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sqlglot.tokens

   1from __future__ import annotations
   2
   3import os
   4import typing as t
   5from enum import auto
   6
   7from sqlglot.errors import SqlglotError, TokenError
   8from sqlglot.helper import AutoName
   9from sqlglot.trie import TrieResult, in_trie, new_trie
  10
  11if t.TYPE_CHECKING:
  12    from sqlglot.dialects.dialect import DialectType
  13
  14
  15try:
  16    from sqlglotrs import (  # type: ignore
  17        Tokenizer as RsTokenizer,
  18        TokenizerDialectSettings as RsTokenizerDialectSettings,
  19        TokenizerSettings as RsTokenizerSettings,
  20        TokenTypeSettings as RsTokenTypeSettings,
  21    )
  22
  23    USE_RS_TOKENIZER = os.environ.get("SQLGLOTRS_TOKENIZER", "1") == "1"
  24except ImportError:
  25    USE_RS_TOKENIZER = False
  26
  27
  28class TokenType(AutoName):
  29    L_PAREN = auto()
  30    R_PAREN = auto()
  31    L_BRACKET = auto()
  32    R_BRACKET = auto()
  33    L_BRACE = auto()
  34    R_BRACE = auto()
  35    COMMA = auto()
  36    DOT = auto()
  37    DASH = auto()
  38    PLUS = auto()
  39    COLON = auto()
  40    DOTCOLON = auto()
  41    DCOLON = auto()
  42    DQMARK = auto()
  43    SEMICOLON = auto()
  44    STAR = auto()
  45    BACKSLASH = auto()
  46    SLASH = auto()
  47    LT = auto()
  48    LTE = auto()
  49    GT = auto()
  50    GTE = auto()
  51    NOT = auto()
  52    EQ = auto()
  53    NEQ = auto()
  54    NULLSAFE_EQ = auto()
  55    COLON_EQ = auto()
  56    AND = auto()
  57    OR = auto()
  58    AMP = auto()
  59    DPIPE = auto()
  60    PIPE_GT = auto()
  61    PIPE = auto()
  62    PIPE_SLASH = auto()
  63    DPIPE_SLASH = auto()
  64    CARET = auto()
  65    CARET_AT = auto()
  66    TILDA = auto()
  67    ARROW = auto()
  68    DARROW = auto()
  69    FARROW = auto()
  70    HASH = auto()
  71    HASH_ARROW = auto()
  72    DHASH_ARROW = auto()
  73    LR_ARROW = auto()
  74    DAT = auto()
  75    LT_AT = auto()
  76    AT_GT = auto()
  77    DOLLAR = auto()
  78    PARAMETER = auto()
  79    SESSION_PARAMETER = auto()
  80    DAMP = auto()
  81    XOR = auto()
  82    DSTAR = auto()
  83
  84    URI_START = auto()
  85
  86    BLOCK_START = auto()
  87    BLOCK_END = auto()
  88
  89    SPACE = auto()
  90    BREAK = auto()
  91
  92    STRING = auto()
  93    NUMBER = auto()
  94    IDENTIFIER = auto()
  95    DATABASE = auto()
  96    COLUMN = auto()
  97    COLUMN_DEF = auto()
  98    SCHEMA = auto()
  99    TABLE = auto()
 100    WAREHOUSE = auto()
 101    STAGE = auto()
 102    STREAMLIT = auto()
 103    VAR = auto()
 104    BIT_STRING = auto()
 105    HEX_STRING = auto()
 106    BYTE_STRING = auto()
 107    NATIONAL_STRING = auto()
 108    RAW_STRING = auto()
 109    HEREDOC_STRING = auto()
 110    UNICODE_STRING = auto()
 111
 112    # types
 113    BIT = auto()
 114    BOOLEAN = auto()
 115    TINYINT = auto()
 116    UTINYINT = auto()
 117    SMALLINT = auto()
 118    USMALLINT = auto()
 119    MEDIUMINT = auto()
 120    UMEDIUMINT = auto()
 121    INT = auto()
 122    UINT = auto()
 123    BIGINT = auto()
 124    UBIGINT = auto()
 125    INT128 = auto()
 126    UINT128 = auto()
 127    INT256 = auto()
 128    UINT256 = auto()
 129    FLOAT = auto()
 130    DOUBLE = auto()
 131    UDOUBLE = auto()
 132    DECIMAL = auto()
 133    DECIMAL32 = auto()
 134    DECIMAL64 = auto()
 135    DECIMAL128 = auto()
 136    DECIMAL256 = auto()
 137    UDECIMAL = auto()
 138    BIGDECIMAL = auto()
 139    CHAR = auto()
 140    NCHAR = auto()
 141    VARCHAR = auto()
 142    NVARCHAR = auto()
 143    BPCHAR = auto()
 144    TEXT = auto()
 145    MEDIUMTEXT = auto()
 146    LONGTEXT = auto()
 147    BLOB = auto()
 148    MEDIUMBLOB = auto()
 149    LONGBLOB = auto()
 150    TINYBLOB = auto()
 151    TINYTEXT = auto()
 152    NAME = auto()
 153    BINARY = auto()
 154    VARBINARY = auto()
 155    JSON = auto()
 156    JSONB = auto()
 157    TIME = auto()
 158    TIMETZ = auto()
 159    TIMESTAMP = auto()
 160    TIMESTAMPTZ = auto()
 161    TIMESTAMPLTZ = auto()
 162    TIMESTAMPNTZ = auto()
 163    TIMESTAMP_S = auto()
 164    TIMESTAMP_MS = auto()
 165    TIMESTAMP_NS = auto()
 166    DATETIME = auto()
 167    DATETIME2 = auto()
 168    DATETIME64 = auto()
 169    SMALLDATETIME = auto()
 170    DATE = auto()
 171    DATE32 = auto()
 172    INT4RANGE = auto()
 173    INT4MULTIRANGE = auto()
 174    INT8RANGE = auto()
 175    INT8MULTIRANGE = auto()
 176    NUMRANGE = auto()
 177    NUMMULTIRANGE = auto()
 178    TSRANGE = auto()
 179    TSMULTIRANGE = auto()
 180    TSTZRANGE = auto()
 181    TSTZMULTIRANGE = auto()
 182    DATERANGE = auto()
 183    DATEMULTIRANGE = auto()
 184    UUID = auto()
 185    GEOGRAPHY = auto()
 186    NULLABLE = auto()
 187    GEOMETRY = auto()
 188    POINT = auto()
 189    RING = auto()
 190    LINESTRING = auto()
 191    MULTILINESTRING = auto()
 192    POLYGON = auto()
 193    MULTIPOLYGON = auto()
 194    HLLSKETCH = auto()
 195    HSTORE = auto()
 196    SUPER = auto()
 197    SERIAL = auto()
 198    SMALLSERIAL = auto()
 199    BIGSERIAL = auto()
 200    XML = auto()
 201    YEAR = auto()
 202    USERDEFINED = auto()
 203    MONEY = auto()
 204    SMALLMONEY = auto()
 205    ROWVERSION = auto()
 206    IMAGE = auto()
 207    VARIANT = auto()
 208    OBJECT = auto()
 209    INET = auto()
 210    IPADDRESS = auto()
 211    IPPREFIX = auto()
 212    IPV4 = auto()
 213    IPV6 = auto()
 214    ENUM = auto()
 215    ENUM8 = auto()
 216    ENUM16 = auto()
 217    FIXEDSTRING = auto()
 218    LOWCARDINALITY = auto()
 219    NESTED = auto()
 220    AGGREGATEFUNCTION = auto()
 221    SIMPLEAGGREGATEFUNCTION = auto()
 222    TDIGEST = auto()
 223    UNKNOWN = auto()
 224    VECTOR = auto()
 225    DYNAMIC = auto()
 226    VOID = auto()
 227
 228    # keywords
 229    ALIAS = auto()
 230    ALTER = auto()
 231    ALWAYS = auto()
 232    ALL = auto()
 233    ANTI = auto()
 234    ANY = auto()
 235    APPLY = auto()
 236    ARRAY = auto()
 237    ASC = auto()
 238    ASOF = auto()
 239    ATTACH = auto()
 240    AUTO_INCREMENT = auto()
 241    BEGIN = auto()
 242    BETWEEN = auto()
 243    BULK_COLLECT_INTO = auto()
 244    CACHE = auto()
 245    CASE = auto()
 246    CHARACTER_SET = auto()
 247    CLUSTER_BY = auto()
 248    COLLATE = auto()
 249    COMMAND = auto()
 250    COMMENT = auto()
 251    COMMIT = auto()
 252    CONNECT_BY = auto()
 253    CONSTRAINT = auto()
 254    COPY = auto()
 255    CREATE = auto()
 256    CROSS = auto()
 257    CUBE = auto()
 258    CURRENT_DATE = auto()
 259    CURRENT_DATETIME = auto()
 260    CURRENT_SCHEMA = auto()
 261    CURRENT_TIME = auto()
 262    CURRENT_TIMESTAMP = auto()
 263    CURRENT_USER = auto()
 264    DECLARE = auto()
 265    DEFAULT = auto()
 266    DELETE = auto()
 267    DESC = auto()
 268    DESCRIBE = auto()
 269    DETACH = auto()
 270    DICTIONARY = auto()
 271    DISTINCT = auto()
 272    DISTRIBUTE_BY = auto()
 273    DIV = auto()
 274    DROP = auto()
 275    ELSE = auto()
 276    END = auto()
 277    ESCAPE = auto()
 278    EXCEPT = auto()
 279    EXECUTE = auto()
 280    EXISTS = auto()
 281    FALSE = auto()
 282    FETCH = auto()
 283    FILE_FORMAT = auto()
 284    FILTER = auto()
 285    FINAL = auto()
 286    FIRST = auto()
 287    FOR = auto()
 288    FORCE = auto()
 289    FOREIGN_KEY = auto()
 290    FORMAT = auto()
 291    FROM = auto()
 292    FULL = auto()
 293    FUNCTION = auto()
 294    GET = auto()
 295    GLOB = auto()
 296    GLOBAL = auto()
 297    GRANT = auto()
 298    GROUP_BY = auto()
 299    GROUPING_SETS = auto()
 300    HAVING = auto()
 301    HINT = auto()
 302    IGNORE = auto()
 303    ILIKE = auto()
 304    ILIKE_ANY = auto()
 305    IN = auto()
 306    INDEX = auto()
 307    INNER = auto()
 308    INSERT = auto()
 309    INTERSECT = auto()
 310    INTERVAL = auto()
 311    INTO = auto()
 312    INTRODUCER = auto()
 313    IRLIKE = auto()
 314    IS = auto()
 315    ISNULL = auto()
 316    JOIN = auto()
 317    JOIN_MARKER = auto()
 318    KEEP = auto()
 319    KEY = auto()
 320    KILL = auto()
 321    LANGUAGE = auto()
 322    LATERAL = auto()
 323    LEFT = auto()
 324    LIKE = auto()
 325    LIKE_ANY = auto()
 326    LIMIT = auto()
 327    LIST = auto()
 328    LOAD = auto()
 329    LOCK = auto()
 330    MAP = auto()
 331    MATCH_CONDITION = auto()
 332    MATCH_RECOGNIZE = auto()
 333    MEMBER_OF = auto()
 334    MERGE = auto()
 335    MOD = auto()
 336    MODEL = auto()
 337    NATURAL = auto()
 338    NEXT = auto()
 339    NOTHING = auto()
 340    NOTNULL = auto()
 341    NULL = auto()
 342    OBJECT_IDENTIFIER = auto()
 343    OFFSET = auto()
 344    ON = auto()
 345    ONLY = auto()
 346    OPERATOR = auto()
 347    ORDER_BY = auto()
 348    ORDER_SIBLINGS_BY = auto()
 349    ORDERED = auto()
 350    ORDINALITY = auto()
 351    OUTER = auto()
 352    OVER = auto()
 353    OVERLAPS = auto()
 354    OVERWRITE = auto()
 355    PARTITION = auto()
 356    PARTITION_BY = auto()
 357    PERCENT = auto()
 358    PIVOT = auto()
 359    PLACEHOLDER = auto()
 360    POSITIONAL = auto()
 361    PRAGMA = auto()
 362    PREWHERE = auto()
 363    PRIMARY_KEY = auto()
 364    PROCEDURE = auto()
 365    PROPERTIES = auto()
 366    PSEUDO_TYPE = auto()
 367    PUT = auto()
 368    QUALIFY = auto()
 369    QUOTE = auto()
 370    RANGE = auto()
 371    RECURSIVE = auto()
 372    REFRESH = auto()
 373    RENAME = auto()
 374    REPLACE = auto()
 375    RETURNING = auto()
 376    REFERENCES = auto()
 377    RIGHT = auto()
 378    RLIKE = auto()
 379    ROLLBACK = auto()
 380    ROLLUP = auto()
 381    ROW = auto()
 382    ROWS = auto()
 383    SELECT = auto()
 384    SEMI = auto()
 385    SEPARATOR = auto()
 386    SEQUENCE = auto()
 387    SERDE_PROPERTIES = auto()
 388    SET = auto()
 389    SETTINGS = auto()
 390    SHOW = auto()
 391    SIMILAR_TO = auto()
 392    SOME = auto()
 393    SORT_BY = auto()
 394    START_WITH = auto()
 395    STORAGE_INTEGRATION = auto()
 396    STRAIGHT_JOIN = auto()
 397    STRUCT = auto()
 398    SUMMARIZE = auto()
 399    TABLE_SAMPLE = auto()
 400    TAG = auto()
 401    TEMPORARY = auto()
 402    TOP = auto()
 403    THEN = auto()
 404    TRUE = auto()
 405    TRUNCATE = auto()
 406    UNCACHE = auto()
 407    UNION = auto()
 408    UNNEST = auto()
 409    UNPIVOT = auto()
 410    UPDATE = auto()
 411    USE = auto()
 412    USING = auto()
 413    VALUES = auto()
 414    VIEW = auto()
 415    VOLATILE = auto()
 416    WHEN = auto()
 417    WHERE = auto()
 418    WINDOW = auto()
 419    WITH = auto()
 420    UNIQUE = auto()
 421    VERSION_SNAPSHOT = auto()
 422    TIMESTAMP_SNAPSHOT = auto()
 423    OPTION = auto()
 424    SINK = auto()
 425    SOURCE = auto()
 426    ANALYZE = auto()
 427    NAMESPACE = auto()
 428    EXPORT = auto()
 429
 430
 431_ALL_TOKEN_TYPES = list(TokenType)
 432_TOKEN_TYPE_TO_INDEX = {token_type: i for i, token_type in enumerate(_ALL_TOKEN_TYPES)}
 433
 434
 435class Token:
 436    __slots__ = ("token_type", "text", "line", "col", "start", "end", "comments")
 437
 438    @classmethod
 439    def number(cls, number: int) -> Token:
 440        """Returns a NUMBER token with `number` as its text."""
 441        return cls(TokenType.NUMBER, str(number))
 442
 443    @classmethod
 444    def string(cls, string: str) -> Token:
 445        """Returns a STRING token with `string` as its text."""
 446        return cls(TokenType.STRING, string)
 447
 448    @classmethod
 449    def identifier(cls, identifier: str) -> Token:
 450        """Returns an IDENTIFIER token with `identifier` as its text."""
 451        return cls(TokenType.IDENTIFIER, identifier)
 452
 453    @classmethod
 454    def var(cls, var: str) -> Token:
 455        """Returns an VAR token with `var` as its text."""
 456        return cls(TokenType.VAR, var)
 457
 458    def __init__(
 459        self,
 460        token_type: TokenType,
 461        text: str,
 462        line: int = 1,
 463        col: int = 1,
 464        start: int = 0,
 465        end: int = 0,
 466        comments: t.Optional[t.List[str]] = None,
 467    ) -> None:
 468        """Token initializer.
 469
 470        Args:
 471            token_type: The TokenType Enum.
 472            text: The text of the token.
 473            line: The line that the token ends on.
 474            col: The column that the token ends on.
 475            start: The start index of the token.
 476            end: The ending index of the token.
 477            comments: The comments to attach to the token.
 478        """
 479        self.token_type = token_type
 480        self.text = text
 481        self.line = line
 482        self.col = col
 483        self.start = start
 484        self.end = end
 485        self.comments = [] if comments is None else comments
 486
 487    def __repr__(self) -> str:
 488        attributes = ", ".join(f"{k}: {getattr(self, k)}" for k in self.__slots__)
 489        return f"<Token {attributes}>"
 490
 491
 492class _Tokenizer(type):
 493    def __new__(cls, clsname, bases, attrs):
 494        klass = super().__new__(cls, clsname, bases, attrs)
 495
 496        def _convert_quotes(arr: t.List[str | t.Tuple[str, str]]) -> t.Dict[str, str]:
 497            return dict(
 498                (item, item) if isinstance(item, str) else (item[0], item[1]) for item in arr
 499            )
 500
 501        def _quotes_to_format(
 502            token_type: TokenType, arr: t.List[str | t.Tuple[str, str]]
 503        ) -> t.Dict[str, t.Tuple[str, TokenType]]:
 504            return {k: (v, token_type) for k, v in _convert_quotes(arr).items()}
 505
 506        klass._QUOTES = _convert_quotes(klass.QUOTES)
 507        klass._IDENTIFIERS = _convert_quotes(klass.IDENTIFIERS)
 508
 509        klass._FORMAT_STRINGS = {
 510            **{
 511                p + s: (e, TokenType.NATIONAL_STRING)
 512                for s, e in klass._QUOTES.items()
 513                for p in ("n", "N")
 514            },
 515            **_quotes_to_format(TokenType.BIT_STRING, klass.BIT_STRINGS),
 516            **_quotes_to_format(TokenType.BYTE_STRING, klass.BYTE_STRINGS),
 517            **_quotes_to_format(TokenType.HEX_STRING, klass.HEX_STRINGS),
 518            **_quotes_to_format(TokenType.RAW_STRING, klass.RAW_STRINGS),
 519            **_quotes_to_format(TokenType.HEREDOC_STRING, klass.HEREDOC_STRINGS),
 520            **_quotes_to_format(TokenType.UNICODE_STRING, klass.UNICODE_STRINGS),
 521        }
 522
 523        klass._STRING_ESCAPES = set(klass.STRING_ESCAPES)
 524        klass._IDENTIFIER_ESCAPES = set(klass.IDENTIFIER_ESCAPES)
 525        klass._COMMENTS = {
 526            **dict(
 527                (comment, None) if isinstance(comment, str) else (comment[0], comment[1])
 528                for comment in klass.COMMENTS
 529            ),
 530            "{#": "#}",  # Ensure Jinja comments are tokenized correctly in all dialects
 531        }
 532        if klass.HINT_START in klass.KEYWORDS:
 533            klass._COMMENTS[klass.HINT_START] = "*/"
 534
 535        klass._KEYWORD_TRIE = new_trie(
 536            key.upper()
 537            for key in (
 538                *klass.KEYWORDS,
 539                *klass._COMMENTS,
 540                *klass._QUOTES,
 541                *klass._FORMAT_STRINGS,
 542            )
 543            if " " in key or any(single in key for single in klass.SINGLE_TOKENS)
 544        )
 545
 546        if USE_RS_TOKENIZER:
 547            settings = RsTokenizerSettings(
 548                white_space={k: _TOKEN_TYPE_TO_INDEX[v] for k, v in klass.WHITE_SPACE.items()},
 549                single_tokens={k: _TOKEN_TYPE_TO_INDEX[v] for k, v in klass.SINGLE_TOKENS.items()},
 550                keywords={k: _TOKEN_TYPE_TO_INDEX[v] for k, v in klass.KEYWORDS.items()},
 551                numeric_literals=klass.NUMERIC_LITERALS,
 552                identifiers=klass._IDENTIFIERS,
 553                identifier_escapes=klass._IDENTIFIER_ESCAPES,
 554                string_escapes=klass._STRING_ESCAPES,
 555                quotes=klass._QUOTES,
 556                format_strings={
 557                    k: (v1, _TOKEN_TYPE_TO_INDEX[v2])
 558                    for k, (v1, v2) in klass._FORMAT_STRINGS.items()
 559                },
 560                has_bit_strings=bool(klass.BIT_STRINGS),
 561                has_hex_strings=bool(klass.HEX_STRINGS),
 562                comments=klass._COMMENTS,
 563                var_single_tokens=klass.VAR_SINGLE_TOKENS,
 564                commands={_TOKEN_TYPE_TO_INDEX[v] for v in klass.COMMANDS},
 565                command_prefix_tokens={
 566                    _TOKEN_TYPE_TO_INDEX[v] for v in klass.COMMAND_PREFIX_TOKENS
 567                },
 568                heredoc_tag_is_identifier=klass.HEREDOC_TAG_IS_IDENTIFIER,
 569                string_escapes_allowed_in_raw_strings=klass.STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS,
 570                nested_comments=klass.NESTED_COMMENTS,
 571                hint_start=klass.HINT_START,
 572                tokens_preceding_hint={
 573                    _TOKEN_TYPE_TO_INDEX[v] for v in klass.TOKENS_PRECEDING_HINT
 574                },
 575            )
 576            token_types = RsTokenTypeSettings(
 577                bit_string=_TOKEN_TYPE_TO_INDEX[TokenType.BIT_STRING],
 578                break_=_TOKEN_TYPE_TO_INDEX[TokenType.BREAK],
 579                dcolon=_TOKEN_TYPE_TO_INDEX[TokenType.DCOLON],
 580                heredoc_string=_TOKEN_TYPE_TO_INDEX[TokenType.HEREDOC_STRING],
 581                raw_string=_TOKEN_TYPE_TO_INDEX[TokenType.RAW_STRING],
 582                hex_string=_TOKEN_TYPE_TO_INDEX[TokenType.HEX_STRING],
 583                identifier=_TOKEN_TYPE_TO_INDEX[TokenType.IDENTIFIER],
 584                number=_TOKEN_TYPE_TO_INDEX[TokenType.NUMBER],
 585                parameter=_TOKEN_TYPE_TO_INDEX[TokenType.PARAMETER],
 586                semicolon=_TOKEN_TYPE_TO_INDEX[TokenType.SEMICOLON],
 587                string=_TOKEN_TYPE_TO_INDEX[TokenType.STRING],
 588                var=_TOKEN_TYPE_TO_INDEX[TokenType.VAR],
 589                heredoc_string_alternative=_TOKEN_TYPE_TO_INDEX[klass.HEREDOC_STRING_ALTERNATIVE],
 590                hint=_TOKEN_TYPE_TO_INDEX[TokenType.HINT],
 591            )
 592            klass._RS_TOKENIZER = RsTokenizer(settings, token_types)
 593        else:
 594            klass._RS_TOKENIZER = None
 595
 596        return klass
 597
 598
 599class Tokenizer(metaclass=_Tokenizer):
 600    SINGLE_TOKENS = {
 601        "(": TokenType.L_PAREN,
 602        ")": TokenType.R_PAREN,
 603        "[": TokenType.L_BRACKET,
 604        "]": TokenType.R_BRACKET,
 605        "{": TokenType.L_BRACE,
 606        "}": TokenType.R_BRACE,
 607        "&": TokenType.AMP,
 608        "^": TokenType.CARET,
 609        ":": TokenType.COLON,
 610        ",": TokenType.COMMA,
 611        ".": TokenType.DOT,
 612        "-": TokenType.DASH,
 613        "=": TokenType.EQ,
 614        ">": TokenType.GT,
 615        "<": TokenType.LT,
 616        "%": TokenType.MOD,
 617        "!": TokenType.NOT,
 618        "|": TokenType.PIPE,
 619        "+": TokenType.PLUS,
 620        ";": TokenType.SEMICOLON,
 621        "/": TokenType.SLASH,
 622        "\\": TokenType.BACKSLASH,
 623        "*": TokenType.STAR,
 624        "~": TokenType.TILDA,
 625        "?": TokenType.PLACEHOLDER,
 626        "@": TokenType.PARAMETER,
 627        "#": TokenType.HASH,
 628        # Used for breaking a var like x'y' but nothing else the token type doesn't matter
 629        "'": TokenType.UNKNOWN,
 630        "`": TokenType.UNKNOWN,
 631        '"': TokenType.UNKNOWN,
 632    }
 633
 634    BIT_STRINGS: t.List[str | t.Tuple[str, str]] = []
 635    BYTE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 636    HEX_STRINGS: t.List[str | t.Tuple[str, str]] = []
 637    RAW_STRINGS: t.List[str | t.Tuple[str, str]] = []
 638    HEREDOC_STRINGS: t.List[str | t.Tuple[str, str]] = []
 639    UNICODE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 640    IDENTIFIERS: t.List[str | t.Tuple[str, str]] = ['"']
 641    QUOTES: t.List[t.Tuple[str, str] | str] = ["'"]
 642    STRING_ESCAPES = ["'"]
 643    VAR_SINGLE_TOKENS: t.Set[str] = set()
 644
 645    # The strings in this list can always be used as escapes, regardless of the surrounding
 646    # identifier delimiters. By default, the closing delimiter is assumed to also act as an
 647    # identifier escape, e.g. if we use double-quotes, then they also act as escapes: "x"""
 648    IDENTIFIER_ESCAPES: t.List[str] = []
 649
 650    # Whether the heredoc tags follow the same lexical rules as unquoted identifiers
 651    HEREDOC_TAG_IS_IDENTIFIER = False
 652
 653    # Token that we'll generate as a fallback if the heredoc prefix doesn't correspond to a heredoc
 654    HEREDOC_STRING_ALTERNATIVE = TokenType.VAR
 655
 656    # Whether string escape characters function as such when placed within raw strings
 657    STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS = True
 658
 659    NESTED_COMMENTS = True
 660
 661    HINT_START = "/*+"
 662
 663    TOKENS_PRECEDING_HINT = {TokenType.SELECT, TokenType.INSERT, TokenType.UPDATE, TokenType.DELETE}
 664
 665    # Autofilled
 666    _COMMENTS: t.Dict[str, str] = {}
 667    _FORMAT_STRINGS: t.Dict[str, t.Tuple[str, TokenType]] = {}
 668    _IDENTIFIERS: t.Dict[str, str] = {}
 669    _IDENTIFIER_ESCAPES: t.Set[str] = set()
 670    _QUOTES: t.Dict[str, str] = {}
 671    _STRING_ESCAPES: t.Set[str] = set()
 672    _KEYWORD_TRIE: t.Dict = {}
 673    _RS_TOKENIZER: t.Optional[t.Any] = None
 674
 675    KEYWORDS: t.Dict[str, TokenType] = {
 676        **{f"{{%{postfix}": TokenType.BLOCK_START for postfix in ("", "+", "-")},
 677        **{f"{prefix}%}}": TokenType.BLOCK_END for prefix in ("", "+", "-")},
 678        **{f"{{{{{postfix}": TokenType.BLOCK_START for postfix in ("+", "-")},
 679        **{f"{prefix}}}}}": TokenType.BLOCK_END for prefix in ("+", "-")},
 680        HINT_START: TokenType.HINT,
 681        "==": TokenType.EQ,
 682        "::": TokenType.DCOLON,
 683        "||": TokenType.DPIPE,
 684        "|>": TokenType.PIPE_GT,
 685        ">=": TokenType.GTE,
 686        "<=": TokenType.LTE,
 687        "<>": TokenType.NEQ,
 688        "!=": TokenType.NEQ,
 689        ":=": TokenType.COLON_EQ,
 690        "<=>": TokenType.NULLSAFE_EQ,
 691        "->": TokenType.ARROW,
 692        "->>": TokenType.DARROW,
 693        "=>": TokenType.FARROW,
 694        "#>": TokenType.HASH_ARROW,
 695        "#>>": TokenType.DHASH_ARROW,
 696        "<->": TokenType.LR_ARROW,
 697        "&&": TokenType.DAMP,
 698        "??": TokenType.DQMARK,
 699        "~~~": TokenType.GLOB,
 700        "~~": TokenType.LIKE,
 701        "~~*": TokenType.ILIKE,
 702        "~*": TokenType.IRLIKE,
 703        "ALL": TokenType.ALL,
 704        "ALWAYS": TokenType.ALWAYS,
 705        "AND": TokenType.AND,
 706        "ANTI": TokenType.ANTI,
 707        "ANY": TokenType.ANY,
 708        "ASC": TokenType.ASC,
 709        "AS": TokenType.ALIAS,
 710        "ASOF": TokenType.ASOF,
 711        "AUTOINCREMENT": TokenType.AUTO_INCREMENT,
 712        "AUTO_INCREMENT": TokenType.AUTO_INCREMENT,
 713        "BEGIN": TokenType.BEGIN,
 714        "BETWEEN": TokenType.BETWEEN,
 715        "CACHE": TokenType.CACHE,
 716        "UNCACHE": TokenType.UNCACHE,
 717        "CASE": TokenType.CASE,
 718        "CHARACTER SET": TokenType.CHARACTER_SET,
 719        "CLUSTER BY": TokenType.CLUSTER_BY,
 720        "COLLATE": TokenType.COLLATE,
 721        "COLUMN": TokenType.COLUMN,
 722        "COMMIT": TokenType.COMMIT,
 723        "CONNECT BY": TokenType.CONNECT_BY,
 724        "CONSTRAINT": TokenType.CONSTRAINT,
 725        "COPY": TokenType.COPY,
 726        "CREATE": TokenType.CREATE,
 727        "CROSS": TokenType.CROSS,
 728        "CUBE": TokenType.CUBE,
 729        "CURRENT_DATE": TokenType.CURRENT_DATE,
 730        "CURRENT_SCHEMA": TokenType.CURRENT_SCHEMA,
 731        "CURRENT_TIME": TokenType.CURRENT_TIME,
 732        "CURRENT_TIMESTAMP": TokenType.CURRENT_TIMESTAMP,
 733        "CURRENT_USER": TokenType.CURRENT_USER,
 734        "DATABASE": TokenType.DATABASE,
 735        "DEFAULT": TokenType.DEFAULT,
 736        "DELETE": TokenType.DELETE,
 737        "DESC": TokenType.DESC,
 738        "DESCRIBE": TokenType.DESCRIBE,
 739        "DISTINCT": TokenType.DISTINCT,
 740        "DISTRIBUTE BY": TokenType.DISTRIBUTE_BY,
 741        "DIV": TokenType.DIV,
 742        "DROP": TokenType.DROP,
 743        "ELSE": TokenType.ELSE,
 744        "END": TokenType.END,
 745        "ENUM": TokenType.ENUM,
 746        "ESCAPE": TokenType.ESCAPE,
 747        "EXCEPT": TokenType.EXCEPT,
 748        "EXECUTE": TokenType.EXECUTE,
 749        "EXISTS": TokenType.EXISTS,
 750        "FALSE": TokenType.FALSE,
 751        "FETCH": TokenType.FETCH,
 752        "FILTER": TokenType.FILTER,
 753        "FIRST": TokenType.FIRST,
 754        "FULL": TokenType.FULL,
 755        "FUNCTION": TokenType.FUNCTION,
 756        "FOR": TokenType.FOR,
 757        "FOREIGN KEY": TokenType.FOREIGN_KEY,
 758        "FORMAT": TokenType.FORMAT,
 759        "FROM": TokenType.FROM,
 760        "GEOGRAPHY": TokenType.GEOGRAPHY,
 761        "GEOMETRY": TokenType.GEOMETRY,
 762        "GLOB": TokenType.GLOB,
 763        "GROUP BY": TokenType.GROUP_BY,
 764        "GROUPING SETS": TokenType.GROUPING_SETS,
 765        "HAVING": TokenType.HAVING,
 766        "ILIKE": TokenType.ILIKE,
 767        "IN": TokenType.IN,
 768        "INDEX": TokenType.INDEX,
 769        "INET": TokenType.INET,
 770        "INNER": TokenType.INNER,
 771        "INSERT": TokenType.INSERT,
 772        "INTERVAL": TokenType.INTERVAL,
 773        "INTERSECT": TokenType.INTERSECT,
 774        "INTO": TokenType.INTO,
 775        "IS": TokenType.IS,
 776        "ISNULL": TokenType.ISNULL,
 777        "JOIN": TokenType.JOIN,
 778        "KEEP": TokenType.KEEP,
 779        "KILL": TokenType.KILL,
 780        "LATERAL": TokenType.LATERAL,
 781        "LEFT": TokenType.LEFT,
 782        "LIKE": TokenType.LIKE,
 783        "LIMIT": TokenType.LIMIT,
 784        "LOAD": TokenType.LOAD,
 785        "LOCK": TokenType.LOCK,
 786        "MERGE": TokenType.MERGE,
 787        "NAMESPACE": TokenType.NAMESPACE,
 788        "NATURAL": TokenType.NATURAL,
 789        "NEXT": TokenType.NEXT,
 790        "NOT": TokenType.NOT,
 791        "NOTNULL": TokenType.NOTNULL,
 792        "NULL": TokenType.NULL,
 793        "OBJECT": TokenType.OBJECT,
 794        "OFFSET": TokenType.OFFSET,
 795        "ON": TokenType.ON,
 796        "OR": TokenType.OR,
 797        "XOR": TokenType.XOR,
 798        "ORDER BY": TokenType.ORDER_BY,
 799        "ORDINALITY": TokenType.ORDINALITY,
 800        "OUTER": TokenType.OUTER,
 801        "OVER": TokenType.OVER,
 802        "OVERLAPS": TokenType.OVERLAPS,
 803        "OVERWRITE": TokenType.OVERWRITE,
 804        "PARTITION": TokenType.PARTITION,
 805        "PARTITION BY": TokenType.PARTITION_BY,
 806        "PARTITIONED BY": TokenType.PARTITION_BY,
 807        "PARTITIONED_BY": TokenType.PARTITION_BY,
 808        "PERCENT": TokenType.PERCENT,
 809        "PIVOT": TokenType.PIVOT,
 810        "PRAGMA": TokenType.PRAGMA,
 811        "PRIMARY KEY": TokenType.PRIMARY_KEY,
 812        "PROCEDURE": TokenType.PROCEDURE,
 813        "QUALIFY": TokenType.QUALIFY,
 814        "RANGE": TokenType.RANGE,
 815        "RECURSIVE": TokenType.RECURSIVE,
 816        "REGEXP": TokenType.RLIKE,
 817        "RENAME": TokenType.RENAME,
 818        "REPLACE": TokenType.REPLACE,
 819        "RETURNING": TokenType.RETURNING,
 820        "REFERENCES": TokenType.REFERENCES,
 821        "RIGHT": TokenType.RIGHT,
 822        "RLIKE": TokenType.RLIKE,
 823        "ROLLBACK": TokenType.ROLLBACK,
 824        "ROLLUP": TokenType.ROLLUP,
 825        "ROW": TokenType.ROW,
 826        "ROWS": TokenType.ROWS,
 827        "SCHEMA": TokenType.SCHEMA,
 828        "SELECT": TokenType.SELECT,
 829        "SEMI": TokenType.SEMI,
 830        "SET": TokenType.SET,
 831        "SETTINGS": TokenType.SETTINGS,
 832        "SHOW": TokenType.SHOW,
 833        "SIMILAR TO": TokenType.SIMILAR_TO,
 834        "SOME": TokenType.SOME,
 835        "SORT BY": TokenType.SORT_BY,
 836        "START WITH": TokenType.START_WITH,
 837        "STRAIGHT_JOIN": TokenType.STRAIGHT_JOIN,
 838        "TABLE": TokenType.TABLE,
 839        "TABLESAMPLE": TokenType.TABLE_SAMPLE,
 840        "TEMP": TokenType.TEMPORARY,
 841        "TEMPORARY": TokenType.TEMPORARY,
 842        "THEN": TokenType.THEN,
 843        "TRUE": TokenType.TRUE,
 844        "TRUNCATE": TokenType.TRUNCATE,
 845        "UNION": TokenType.UNION,
 846        "UNKNOWN": TokenType.UNKNOWN,
 847        "UNNEST": TokenType.UNNEST,
 848        "UNPIVOT": TokenType.UNPIVOT,
 849        "UPDATE": TokenType.UPDATE,
 850        "USE": TokenType.USE,
 851        "USING": TokenType.USING,
 852        "UUID": TokenType.UUID,
 853        "VALUES": TokenType.VALUES,
 854        "VIEW": TokenType.VIEW,
 855        "VOLATILE": TokenType.VOLATILE,
 856        "WHEN": TokenType.WHEN,
 857        "WHERE": TokenType.WHERE,
 858        "WINDOW": TokenType.WINDOW,
 859        "WITH": TokenType.WITH,
 860        "APPLY": TokenType.APPLY,
 861        "ARRAY": TokenType.ARRAY,
 862        "BIT": TokenType.BIT,
 863        "BOOL": TokenType.BOOLEAN,
 864        "BOOLEAN": TokenType.BOOLEAN,
 865        "BYTE": TokenType.TINYINT,
 866        "MEDIUMINT": TokenType.MEDIUMINT,
 867        "INT1": TokenType.TINYINT,
 868        "TINYINT": TokenType.TINYINT,
 869        "INT16": TokenType.SMALLINT,
 870        "SHORT": TokenType.SMALLINT,
 871        "SMALLINT": TokenType.SMALLINT,
 872        "HUGEINT": TokenType.INT128,
 873        "UHUGEINT": TokenType.UINT128,
 874        "INT2": TokenType.SMALLINT,
 875        "INTEGER": TokenType.INT,
 876        "INT": TokenType.INT,
 877        "INT4": TokenType.INT,
 878        "INT32": TokenType.INT,
 879        "INT64": TokenType.BIGINT,
 880        "INT128": TokenType.INT128,
 881        "INT256": TokenType.INT256,
 882        "LONG": TokenType.BIGINT,
 883        "BIGINT": TokenType.BIGINT,
 884        "INT8": TokenType.TINYINT,
 885        "UINT": TokenType.UINT,
 886        "UINT128": TokenType.UINT128,
 887        "UINT256": TokenType.UINT256,
 888        "DEC": TokenType.DECIMAL,
 889        "DECIMAL": TokenType.DECIMAL,
 890        "DECIMAL32": TokenType.DECIMAL32,
 891        "DECIMAL64": TokenType.DECIMAL64,
 892        "DECIMAL128": TokenType.DECIMAL128,
 893        "DECIMAL256": TokenType.DECIMAL256,
 894        "BIGDECIMAL": TokenType.BIGDECIMAL,
 895        "BIGNUMERIC": TokenType.BIGDECIMAL,
 896        "LIST": TokenType.LIST,
 897        "MAP": TokenType.MAP,
 898        "NULLABLE": TokenType.NULLABLE,
 899        "NUMBER": TokenType.DECIMAL,
 900        "NUMERIC": TokenType.DECIMAL,
 901        "FIXED": TokenType.DECIMAL,
 902        "REAL": TokenType.FLOAT,
 903        "FLOAT": TokenType.FLOAT,
 904        "FLOAT4": TokenType.FLOAT,
 905        "FLOAT8": TokenType.DOUBLE,
 906        "DOUBLE": TokenType.DOUBLE,
 907        "DOUBLE PRECISION": TokenType.DOUBLE,
 908        "JSON": TokenType.JSON,
 909        "JSONB": TokenType.JSONB,
 910        "CHAR": TokenType.CHAR,
 911        "CHARACTER": TokenType.CHAR,
 912        "CHAR VARYING": TokenType.VARCHAR,
 913        "CHARACTER VARYING": TokenType.VARCHAR,
 914        "NCHAR": TokenType.NCHAR,
 915        "VARCHAR": TokenType.VARCHAR,
 916        "VARCHAR2": TokenType.VARCHAR,
 917        "NVARCHAR": TokenType.NVARCHAR,
 918        "NVARCHAR2": TokenType.NVARCHAR,
 919        "BPCHAR": TokenType.BPCHAR,
 920        "STR": TokenType.TEXT,
 921        "STRING": TokenType.TEXT,
 922        "TEXT": TokenType.TEXT,
 923        "LONGTEXT": TokenType.LONGTEXT,
 924        "MEDIUMTEXT": TokenType.MEDIUMTEXT,
 925        "TINYTEXT": TokenType.TINYTEXT,
 926        "CLOB": TokenType.TEXT,
 927        "LONGVARCHAR": TokenType.TEXT,
 928        "BINARY": TokenType.BINARY,
 929        "BLOB": TokenType.VARBINARY,
 930        "LONGBLOB": TokenType.LONGBLOB,
 931        "MEDIUMBLOB": TokenType.MEDIUMBLOB,
 932        "TINYBLOB": TokenType.TINYBLOB,
 933        "BYTEA": TokenType.VARBINARY,
 934        "VARBINARY": TokenType.VARBINARY,
 935        "TIME": TokenType.TIME,
 936        "TIMETZ": TokenType.TIMETZ,
 937        "TIMESTAMP": TokenType.TIMESTAMP,
 938        "TIMESTAMPTZ": TokenType.TIMESTAMPTZ,
 939        "TIMESTAMPLTZ": TokenType.TIMESTAMPLTZ,
 940        "TIMESTAMP_LTZ": TokenType.TIMESTAMPLTZ,
 941        "TIMESTAMPNTZ": TokenType.TIMESTAMPNTZ,
 942        "TIMESTAMP_NTZ": TokenType.TIMESTAMPNTZ,
 943        "DATE": TokenType.DATE,
 944        "DATETIME": TokenType.DATETIME,
 945        "INT4RANGE": TokenType.INT4RANGE,
 946        "INT4MULTIRANGE": TokenType.INT4MULTIRANGE,
 947        "INT8RANGE": TokenType.INT8RANGE,
 948        "INT8MULTIRANGE": TokenType.INT8MULTIRANGE,
 949        "NUMRANGE": TokenType.NUMRANGE,
 950        "NUMMULTIRANGE": TokenType.NUMMULTIRANGE,
 951        "TSRANGE": TokenType.TSRANGE,
 952        "TSMULTIRANGE": TokenType.TSMULTIRANGE,
 953        "TSTZRANGE": TokenType.TSTZRANGE,
 954        "TSTZMULTIRANGE": TokenType.TSTZMULTIRANGE,
 955        "DATERANGE": TokenType.DATERANGE,
 956        "DATEMULTIRANGE": TokenType.DATEMULTIRANGE,
 957        "UNIQUE": TokenType.UNIQUE,
 958        "VECTOR": TokenType.VECTOR,
 959        "STRUCT": TokenType.STRUCT,
 960        "SEQUENCE": TokenType.SEQUENCE,
 961        "VARIANT": TokenType.VARIANT,
 962        "ALTER": TokenType.ALTER,
 963        "ANALYZE": TokenType.ANALYZE,
 964        "CALL": TokenType.COMMAND,
 965        "COMMENT": TokenType.COMMENT,
 966        "EXPLAIN": TokenType.COMMAND,
 967        "GRANT": TokenType.GRANT,
 968        "OPTIMIZE": TokenType.COMMAND,
 969        "PREPARE": TokenType.COMMAND,
 970        "VACUUM": TokenType.COMMAND,
 971        "USER-DEFINED": TokenType.USERDEFINED,
 972        "FOR VERSION": TokenType.VERSION_SNAPSHOT,
 973        "FOR TIMESTAMP": TokenType.TIMESTAMP_SNAPSHOT,
 974    }
 975
 976    WHITE_SPACE: t.Dict[t.Optional[str], TokenType] = {
 977        " ": TokenType.SPACE,
 978        "\t": TokenType.SPACE,
 979        "\n": TokenType.BREAK,
 980        "\r": TokenType.BREAK,
 981    }
 982
 983    COMMANDS = {
 984        TokenType.COMMAND,
 985        TokenType.EXECUTE,
 986        TokenType.FETCH,
 987        TokenType.SHOW,
 988        TokenType.RENAME,
 989    }
 990
 991    COMMAND_PREFIX_TOKENS = {TokenType.SEMICOLON, TokenType.BEGIN}
 992
 993    # Handle numeric literals like in hive (3L = BIGINT)
 994    NUMERIC_LITERALS: t.Dict[str, str] = {}
 995
 996    COMMENTS = ["--", ("/*", "*/")]
 997
 998    __slots__ = (
 999        "sql",
1000        "size",
1001        "tokens",
1002        "dialect",
1003        "use_rs_tokenizer",
1004        "_start",
1005        "_current",
1006        "_line",
1007        "_col",
1008        "_comments",
1009        "_char",
1010        "_end",
1011        "_peek",
1012        "_prev_token_line",
1013        "_rs_dialect_settings",
1014    )
1015
1016    def __init__(
1017        self, dialect: DialectType = None, use_rs_tokenizer: t.Optional[bool] = None
1018    ) -> None:
1019        from sqlglot.dialects import Dialect
1020
1021        self.dialect = Dialect.get_or_raise(dialect)
1022
1023        # initialize `use_rs_tokenizer`, and allow it to be overwritten per Tokenizer instance
1024        self.use_rs_tokenizer = (
1025            use_rs_tokenizer if use_rs_tokenizer is not None else USE_RS_TOKENIZER
1026        )
1027
1028        if self.use_rs_tokenizer:
1029            self._rs_dialect_settings = RsTokenizerDialectSettings(
1030                unescaped_sequences=self.dialect.UNESCAPED_SEQUENCES,
1031                identifiers_can_start_with_digit=self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT,
1032                numbers_can_be_underscore_separated=self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED,
1033            )
1034
1035        self.reset()
1036
1037    def reset(self) -> None:
1038        self.sql = ""
1039        self.size = 0
1040        self.tokens: t.List[Token] = []
1041        self._start = 0
1042        self._current = 0
1043        self._line = 1
1044        self._col = 0
1045        self._comments: t.List[str] = []
1046
1047        self._char = ""
1048        self._end = False
1049        self._peek = ""
1050        self._prev_token_line = -1
1051
1052    def tokenize(self, sql: str) -> t.List[Token]:
1053        """Returns a list of tokens corresponding to the SQL string `sql`."""
1054        if self.use_rs_tokenizer:
1055            return self.tokenize_rs(sql)
1056
1057        self.reset()
1058        self.sql = sql
1059        self.size = len(sql)
1060
1061        try:
1062            self._scan()
1063        except Exception as e:
1064            start = max(self._current - 50, 0)
1065            end = min(self._current + 50, self.size - 1)
1066            context = self.sql[start:end]
1067            raise TokenError(f"Error tokenizing '{context}'") from e
1068
1069        return self.tokens
1070
1071    def _scan(self, until: t.Optional[t.Callable] = None) -> None:
1072        while self.size and not self._end:
1073            current = self._current
1074
1075            # Skip spaces here rather than iteratively calling advance() for performance reasons
1076            while current < self.size:
1077                char = self.sql[current]
1078
1079                if char.isspace() and (char == " " or char == "\t"):
1080                    current += 1
1081                else:
1082                    break
1083
1084            offset = current - self._current if current > self._current else 1
1085
1086            self._start = current
1087            self._advance(offset)
1088
1089            if not self._char.isspace():
1090                if self._char.isdigit():
1091                    self._scan_number()
1092                elif self._char in self._IDENTIFIERS:
1093                    self._scan_identifier(self._IDENTIFIERS[self._char])
1094                else:
1095                    self._scan_keywords()
1096
1097            if until and until():
1098                break
1099
1100        if self.tokens and self._comments:
1101            self.tokens[-1].comments.extend(self._comments)
1102
1103    def _chars(self, size: int) -> str:
1104        if size == 1:
1105            return self._char
1106
1107        start = self._current - 1
1108        end = start + size
1109
1110        return self.sql[start:end] if end <= self.size else ""
1111
1112    def _advance(self, i: int = 1, alnum: bool = False) -> None:
1113        if self.WHITE_SPACE.get(self._char) is TokenType.BREAK:
1114            # Ensures we don't count an extra line if we get a \r\n line break sequence
1115            if not (self._char == "\r" and self._peek == "\n"):
1116                self._col = i
1117                self._line += 1
1118        else:
1119            self._col += i
1120
1121        self._current += i
1122        self._end = self._current >= self.size
1123        self._char = self.sql[self._current - 1]
1124        self._peek = "" if self._end else self.sql[self._current]
1125
1126        if alnum and self._char.isalnum():
1127            # Here we use local variables instead of attributes for better performance
1128            _col = self._col
1129            _current = self._current
1130            _end = self._end
1131            _peek = self._peek
1132
1133            while _peek.isalnum():
1134                _col += 1
1135                _current += 1
1136                _end = _current >= self.size
1137                _peek = "" if _end else self.sql[_current]
1138
1139            self._col = _col
1140            self._current = _current
1141            self._end = _end
1142            self._peek = _peek
1143            self._char = self.sql[_current - 1]
1144
1145    @property
1146    def _text(self) -> str:
1147        return self.sql[self._start : self._current]
1148
1149    def _add(self, token_type: TokenType, text: t.Optional[str] = None) -> None:
1150        self._prev_token_line = self._line
1151
1152        if self._comments and token_type == TokenType.SEMICOLON and self.tokens:
1153            self.tokens[-1].comments.extend(self._comments)
1154            self._comments = []
1155
1156        self.tokens.append(
1157            Token(
1158                token_type,
1159                text=self._text if text is None else text,
1160                line=self._line,
1161                col=self._col,
1162                start=self._start,
1163                end=self._current - 1,
1164                comments=self._comments,
1165            )
1166        )
1167        self._comments = []
1168
1169        # If we have either a semicolon or a begin token before the command's token, we'll parse
1170        # whatever follows the command's token as a string
1171        if (
1172            token_type in self.COMMANDS
1173            and self._peek != ";"
1174            and (len(self.tokens) == 1 or self.tokens[-2].token_type in self.COMMAND_PREFIX_TOKENS)
1175        ):
1176            start = self._current
1177            tokens = len(self.tokens)
1178            self._scan(lambda: self._peek == ";")
1179            self.tokens = self.tokens[:tokens]
1180            text = self.sql[start : self._current].strip()
1181            if text:
1182                self._add(TokenType.STRING, text)
1183
1184    def _scan_keywords(self) -> None:
1185        size = 0
1186        word = None
1187        chars = self._text
1188        char = chars
1189        prev_space = False
1190        skip = False
1191        trie = self._KEYWORD_TRIE
1192        single_token = char in self.SINGLE_TOKENS
1193
1194        while chars:
1195            if skip:
1196                result = TrieResult.PREFIX
1197            else:
1198                result, trie = in_trie(trie, char.upper())
1199
1200            if result == TrieResult.FAILED:
1201                break
1202            if result == TrieResult.EXISTS:
1203                word = chars
1204
1205            end = self._current + size
1206            size += 1
1207
1208            if end < self.size:
1209                char = self.sql[end]
1210                single_token = single_token or char in self.SINGLE_TOKENS
1211                is_space = char.isspace()
1212
1213                if not is_space or not prev_space:
1214                    if is_space:
1215                        char = " "
1216                    chars += char
1217                    prev_space = is_space
1218                    skip = False
1219                else:
1220                    skip = True
1221            else:
1222                char = ""
1223                break
1224
1225        if word:
1226            if self._scan_string(word):
1227                return
1228            if self._scan_comment(word):
1229                return
1230            if prev_space or single_token or not char:
1231                self._advance(size - 1)
1232                word = word.upper()
1233                self._add(self.KEYWORDS[word], text=word)
1234                return
1235
1236        if self._char in self.SINGLE_TOKENS:
1237            self._add(self.SINGLE_TOKENS[self._char], text=self._char)
1238            return
1239
1240        self._scan_var()
1241
1242    def _scan_comment(self, comment_start: str) -> bool:
1243        if comment_start not in self._COMMENTS:
1244            return False
1245
1246        comment_start_line = self._line
1247        comment_start_size = len(comment_start)
1248        comment_end = self._COMMENTS[comment_start]
1249
1250        if comment_end:
1251            # Skip the comment's start delimiter
1252            self._advance(comment_start_size)
1253
1254            comment_count = 1
1255            comment_end_size = len(comment_end)
1256
1257            while not self._end:
1258                if self._chars(comment_end_size) == comment_end:
1259                    comment_count -= 1
1260                    if not comment_count:
1261                        break
1262
1263                self._advance(alnum=True)
1264
1265                # Nested comments are allowed by some dialects, e.g. databricks, duckdb, postgres
1266                if (
1267                    self.NESTED_COMMENTS
1268                    and not self._end
1269                    and self._chars(comment_end_size) == comment_start
1270                ):
1271                    self._advance(comment_start_size)
1272                    comment_count += 1
1273
1274            self._comments.append(self._text[comment_start_size : -comment_end_size + 1])
1275            self._advance(comment_end_size - 1)
1276        else:
1277            while not self._end and self.WHITE_SPACE.get(self._peek) is not TokenType.BREAK:
1278                self._advance(alnum=True)
1279            self._comments.append(self._text[comment_start_size:])
1280
1281        if (
1282            comment_start == self.HINT_START
1283            and self.tokens
1284            and self.tokens[-1].token_type in self.TOKENS_PRECEDING_HINT
1285        ):
1286            self._add(TokenType.HINT)
1287
1288        # Leading comment is attached to the succeeding token, whilst trailing comment to the preceding.
1289        # Multiple consecutive comments are preserved by appending them to the current comments list.
1290        if comment_start_line == self._prev_token_line:
1291            self.tokens[-1].comments.extend(self._comments)
1292            self._comments = []
1293            self._prev_token_line = self._line
1294
1295        return True
1296
1297    def _scan_number(self) -> None:
1298        if self._char == "0":
1299            peek = self._peek.upper()
1300            if peek == "B":
1301                return self._scan_bits() if self.BIT_STRINGS else self._add(TokenType.NUMBER)
1302            elif peek == "X":
1303                return self._scan_hex() if self.HEX_STRINGS else self._add(TokenType.NUMBER)
1304
1305        decimal = False
1306        scientific = 0
1307
1308        while True:
1309            if self._peek.isdigit():
1310                self._advance()
1311            elif self._peek == "." and not decimal:
1312                if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER:
1313                    return self._add(TokenType.NUMBER)
1314                decimal = True
1315                self._advance()
1316            elif self._peek in ("-", "+") and scientific == 1:
1317                scientific += 1
1318                self._advance()
1319            elif self._peek.upper() == "E" and not scientific:
1320                scientific += 1
1321                self._advance()
1322            elif self._peek.isidentifier():
1323                number_text = self._text
1324                literal = ""
1325
1326                while self._peek.strip() and self._peek not in self.SINGLE_TOKENS:
1327                    literal += self._peek
1328                    self._advance()
1329
1330                token_type = self.KEYWORDS.get(self.NUMERIC_LITERALS.get(literal.upper(), ""))
1331
1332                if token_type:
1333                    self._add(TokenType.NUMBER, number_text)
1334                    self._add(TokenType.DCOLON, "::")
1335                    return self._add(token_type, literal)
1336                else:
1337                    replaced = literal.replace("_", "")
1338                    if self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED and replaced.isdigit():
1339                        return self._add(TokenType.NUMBER, number_text + replaced)
1340                    if self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT:
1341                        return self._add(TokenType.VAR)
1342
1343                self._advance(-len(literal))
1344                return self._add(TokenType.NUMBER, number_text)
1345            else:
1346                return self._add(TokenType.NUMBER)
1347
1348    def _scan_bits(self) -> None:
1349        self._advance()
1350        value = self._extract_value()
1351        try:
1352            # If `value` can't be converted to a binary, fallback to tokenizing it as an identifier
1353            int(value, 2)
1354            self._add(TokenType.BIT_STRING, value[2:])  # Drop the 0b
1355        except ValueError:
1356            self._add(TokenType.IDENTIFIER)
1357
1358    def _scan_hex(self) -> None:
1359        self._advance()
1360        value = self._extract_value()
1361        try:
1362            # If `value` can't be converted to a hex, fallback to tokenizing it as an identifier
1363            int(value, 16)
1364            self._add(TokenType.HEX_STRING, value[2:])  # Drop the 0x
1365        except ValueError:
1366            self._add(TokenType.IDENTIFIER)
1367
1368    def _extract_value(self) -> str:
1369        while True:
1370            char = self._peek.strip()
1371            if char and char not in self.SINGLE_TOKENS:
1372                self._advance(alnum=True)
1373            else:
1374                break
1375
1376        return self._text
1377
1378    def _scan_string(self, start: str) -> bool:
1379        base = None
1380        token_type = TokenType.STRING
1381
1382        if start in self._QUOTES:
1383            end = self._QUOTES[start]
1384        elif start in self._FORMAT_STRINGS:
1385            end, token_type = self._FORMAT_STRINGS[start]
1386
1387            if token_type == TokenType.HEX_STRING:
1388                base = 16
1389            elif token_type == TokenType.BIT_STRING:
1390                base = 2
1391            elif token_type == TokenType.HEREDOC_STRING:
1392                self._advance()
1393
1394                if self._char == end:
1395                    tag = ""
1396                else:
1397                    tag = self._extract_string(
1398                        end,
1399                        raw_string=True,
1400                        raise_unmatched=not self.HEREDOC_TAG_IS_IDENTIFIER,
1401                    )
1402
1403                if tag and self.HEREDOC_TAG_IS_IDENTIFIER and (self._end or not tag.isidentifier()):
1404                    if not self._end:
1405                        self._advance(-1)
1406
1407                    self._advance(-len(tag))
1408                    self._add(self.HEREDOC_STRING_ALTERNATIVE)
1409                    return True
1410
1411                end = f"{start}{tag}{end}"
1412        else:
1413            return False
1414
1415        self._advance(len(start))
1416        text = self._extract_string(end, raw_string=token_type == TokenType.RAW_STRING)
1417
1418        if base:
1419            try:
1420                int(text, base)
1421            except Exception:
1422                raise TokenError(
1423                    f"Numeric string contains invalid characters from {self._line}:{self._start}"
1424                )
1425
1426        self._add(token_type, text)
1427        return True
1428
1429    def _scan_identifier(self, identifier_end: str) -> None:
1430        self._advance()
1431        text = self._extract_string(
1432            identifier_end, escapes=self._IDENTIFIER_ESCAPES | {identifier_end}
1433        )
1434        self._add(TokenType.IDENTIFIER, text)
1435
1436    def _scan_var(self) -> None:
1437        while True:
1438            char = self._peek.strip()
1439            if char and (char in self.VAR_SINGLE_TOKENS or char not in self.SINGLE_TOKENS):
1440                self._advance(alnum=True)
1441            else:
1442                break
1443
1444        self._add(
1445            TokenType.VAR
1446            if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER
1447            else self.KEYWORDS.get(self._text.upper(), TokenType.VAR)
1448        )
1449
1450    def _extract_string(
1451        self,
1452        delimiter: str,
1453        escapes: t.Optional[t.Set[str]] = None,
1454        raw_string: bool = False,
1455        raise_unmatched: bool = True,
1456    ) -> str:
1457        text = ""
1458        delim_size = len(delimiter)
1459        escapes = self._STRING_ESCAPES if escapes is None else escapes
1460
1461        while True:
1462            if (
1463                not raw_string
1464                and self.dialect.UNESCAPED_SEQUENCES
1465                and self._peek
1466                and self._char in self.STRING_ESCAPES
1467            ):
1468                unescaped_sequence = self.dialect.UNESCAPED_SEQUENCES.get(self._char + self._peek)
1469                if unescaped_sequence:
1470                    self._advance(2)
1471                    text += unescaped_sequence
1472                    continue
1473            if (
1474                (self.STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS or not raw_string)
1475                and self._char in escapes
1476                and (self._peek == delimiter or self._peek in escapes)
1477                and (self._char not in self._QUOTES or self._char == self._peek)
1478            ):
1479                if self._peek == delimiter:
1480                    text += self._peek
1481                else:
1482                    text += self._char + self._peek
1483
1484                if self._current + 1 < self.size:
1485                    self._advance(2)
1486                else:
1487                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._current}")
1488            else:
1489                if self._chars(delim_size) == delimiter:
1490                    if delim_size > 1:
1491                        self._advance(delim_size - 1)
1492                    break
1493
1494                if self._end:
1495                    if not raise_unmatched:
1496                        return text + self._char
1497
1498                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._start}")
1499
1500                current = self._current - 1
1501                self._advance(alnum=True)
1502                text += self.sql[current : self._current - 1]
1503
1504        return text
1505
1506    def tokenize_rs(self, sql: str) -> t.List[Token]:
1507        if not self._RS_TOKENIZER:
1508            raise SqlglotError("Rust tokenizer is not available")
1509
1510        tokens, error_msg = self._RS_TOKENIZER.tokenize(sql, self._rs_dialect_settings)
1511        for token in tokens:
1512            token.token_type = _ALL_TOKEN_TYPES[token.token_type_index]
1513
1514        # Setting this here so partial token lists can be inspected even if there is a failure
1515        self.tokens = tokens
1516
1517        if error_msg is not None:
1518            raise TokenError(error_msg)
1519
1520        return tokens
class TokenType(sqlglot.helper.AutoName):
 29class TokenType(AutoName):
 30    L_PAREN = auto()
 31    R_PAREN = auto()
 32    L_BRACKET = auto()
 33    R_BRACKET = auto()
 34    L_BRACE = auto()
 35    R_BRACE = auto()
 36    COMMA = auto()
 37    DOT = auto()
 38    DASH = auto()
 39    PLUS = auto()
 40    COLON = auto()
 41    DOTCOLON = auto()
 42    DCOLON = auto()
 43    DQMARK = auto()
 44    SEMICOLON = auto()
 45    STAR = auto()
 46    BACKSLASH = auto()
 47    SLASH = auto()
 48    LT = auto()
 49    LTE = auto()
 50    GT = auto()
 51    GTE = auto()
 52    NOT = auto()
 53    EQ = auto()
 54    NEQ = auto()
 55    NULLSAFE_EQ = auto()
 56    COLON_EQ = auto()
 57    AND = auto()
 58    OR = auto()
 59    AMP = auto()
 60    DPIPE = auto()
 61    PIPE_GT = auto()
 62    PIPE = auto()
 63    PIPE_SLASH = auto()
 64    DPIPE_SLASH = auto()
 65    CARET = auto()
 66    CARET_AT = auto()
 67    TILDA = auto()
 68    ARROW = auto()
 69    DARROW = auto()
 70    FARROW = auto()
 71    HASH = auto()
 72    HASH_ARROW = auto()
 73    DHASH_ARROW = auto()
 74    LR_ARROW = auto()
 75    DAT = auto()
 76    LT_AT = auto()
 77    AT_GT = auto()
 78    DOLLAR = auto()
 79    PARAMETER = auto()
 80    SESSION_PARAMETER = auto()
 81    DAMP = auto()
 82    XOR = auto()
 83    DSTAR = auto()
 84
 85    URI_START = auto()
 86
 87    BLOCK_START = auto()
 88    BLOCK_END = auto()
 89
 90    SPACE = auto()
 91    BREAK = auto()
 92
 93    STRING = auto()
 94    NUMBER = auto()
 95    IDENTIFIER = auto()
 96    DATABASE = auto()
 97    COLUMN = auto()
 98    COLUMN_DEF = auto()
 99    SCHEMA = auto()
100    TABLE = auto()
101    WAREHOUSE = auto()
102    STAGE = auto()
103    STREAMLIT = auto()
104    VAR = auto()
105    BIT_STRING = auto()
106    HEX_STRING = auto()
107    BYTE_STRING = auto()
108    NATIONAL_STRING = auto()
109    RAW_STRING = auto()
110    HEREDOC_STRING = auto()
111    UNICODE_STRING = auto()
112
113    # types
114    BIT = auto()
115    BOOLEAN = auto()
116    TINYINT = auto()
117    UTINYINT = auto()
118    SMALLINT = auto()
119    USMALLINT = auto()
120    MEDIUMINT = auto()
121    UMEDIUMINT = auto()
122    INT = auto()
123    UINT = auto()
124    BIGINT = auto()
125    UBIGINT = auto()
126    INT128 = auto()
127    UINT128 = auto()
128    INT256 = auto()
129    UINT256 = auto()
130    FLOAT = auto()
131    DOUBLE = auto()
132    UDOUBLE = auto()
133    DECIMAL = auto()
134    DECIMAL32 = auto()
135    DECIMAL64 = auto()
136    DECIMAL128 = auto()
137    DECIMAL256 = auto()
138    UDECIMAL = auto()
139    BIGDECIMAL = auto()
140    CHAR = auto()
141    NCHAR = auto()
142    VARCHAR = auto()
143    NVARCHAR = auto()
144    BPCHAR = auto()
145    TEXT = auto()
146    MEDIUMTEXT = auto()
147    LONGTEXT = auto()
148    BLOB = auto()
149    MEDIUMBLOB = auto()
150    LONGBLOB = auto()
151    TINYBLOB = auto()
152    TINYTEXT = auto()
153    NAME = auto()
154    BINARY = auto()
155    VARBINARY = auto()
156    JSON = auto()
157    JSONB = auto()
158    TIME = auto()
159    TIMETZ = auto()
160    TIMESTAMP = auto()
161    TIMESTAMPTZ = auto()
162    TIMESTAMPLTZ = auto()
163    TIMESTAMPNTZ = auto()
164    TIMESTAMP_S = auto()
165    TIMESTAMP_MS = auto()
166    TIMESTAMP_NS = auto()
167    DATETIME = auto()
168    DATETIME2 = auto()
169    DATETIME64 = auto()
170    SMALLDATETIME = auto()
171    DATE = auto()
172    DATE32 = auto()
173    INT4RANGE = auto()
174    INT4MULTIRANGE = auto()
175    INT8RANGE = auto()
176    INT8MULTIRANGE = auto()
177    NUMRANGE = auto()
178    NUMMULTIRANGE = auto()
179    TSRANGE = auto()
180    TSMULTIRANGE = auto()
181    TSTZRANGE = auto()
182    TSTZMULTIRANGE = auto()
183    DATERANGE = auto()
184    DATEMULTIRANGE = auto()
185    UUID = auto()
186    GEOGRAPHY = auto()
187    NULLABLE = auto()
188    GEOMETRY = auto()
189    POINT = auto()
190    RING = auto()
191    LINESTRING = auto()
192    MULTILINESTRING = auto()
193    POLYGON = auto()
194    MULTIPOLYGON = auto()
195    HLLSKETCH = auto()
196    HSTORE = auto()
197    SUPER = auto()
198    SERIAL = auto()
199    SMALLSERIAL = auto()
200    BIGSERIAL = auto()
201    XML = auto()
202    YEAR = auto()
203    USERDEFINED = auto()
204    MONEY = auto()
205    SMALLMONEY = auto()
206    ROWVERSION = auto()
207    IMAGE = auto()
208    VARIANT = auto()
209    OBJECT = auto()
210    INET = auto()
211    IPADDRESS = auto()
212    IPPREFIX = auto()
213    IPV4 = auto()
214    IPV6 = auto()
215    ENUM = auto()
216    ENUM8 = auto()
217    ENUM16 = auto()
218    FIXEDSTRING = auto()
219    LOWCARDINALITY = auto()
220    NESTED = auto()
221    AGGREGATEFUNCTION = auto()
222    SIMPLEAGGREGATEFUNCTION = auto()
223    TDIGEST = auto()
224    UNKNOWN = auto()
225    VECTOR = auto()
226    DYNAMIC = auto()
227    VOID = auto()
228
229    # keywords
230    ALIAS = auto()
231    ALTER = auto()
232    ALWAYS = auto()
233    ALL = auto()
234    ANTI = auto()
235    ANY = auto()
236    APPLY = auto()
237    ARRAY = auto()
238    ASC = auto()
239    ASOF = auto()
240    ATTACH = auto()
241    AUTO_INCREMENT = auto()
242    BEGIN = auto()
243    BETWEEN = auto()
244    BULK_COLLECT_INTO = auto()
245    CACHE = auto()
246    CASE = auto()
247    CHARACTER_SET = auto()
248    CLUSTER_BY = auto()
249    COLLATE = auto()
250    COMMAND = auto()
251    COMMENT = auto()
252    COMMIT = auto()
253    CONNECT_BY = auto()
254    CONSTRAINT = auto()
255    COPY = auto()
256    CREATE = auto()
257    CROSS = auto()
258    CUBE = auto()
259    CURRENT_DATE = auto()
260    CURRENT_DATETIME = auto()
261    CURRENT_SCHEMA = auto()
262    CURRENT_TIME = auto()
263    CURRENT_TIMESTAMP = auto()
264    CURRENT_USER = auto()
265    DECLARE = auto()
266    DEFAULT = auto()
267    DELETE = auto()
268    DESC = auto()
269    DESCRIBE = auto()
270    DETACH = auto()
271    DICTIONARY = auto()
272    DISTINCT = auto()
273    DISTRIBUTE_BY = auto()
274    DIV = auto()
275    DROP = auto()
276    ELSE = auto()
277    END = auto()
278    ESCAPE = auto()
279    EXCEPT = auto()
280    EXECUTE = auto()
281    EXISTS = auto()
282    FALSE = auto()
283    FETCH = auto()
284    FILE_FORMAT = auto()
285    FILTER = auto()
286    FINAL = auto()
287    FIRST = auto()
288    FOR = auto()
289    FORCE = auto()
290    FOREIGN_KEY = auto()
291    FORMAT = auto()
292    FROM = auto()
293    FULL = auto()
294    FUNCTION = auto()
295    GET = auto()
296    GLOB = auto()
297    GLOBAL = auto()
298    GRANT = auto()
299    GROUP_BY = auto()
300    GROUPING_SETS = auto()
301    HAVING = auto()
302    HINT = auto()
303    IGNORE = auto()
304    ILIKE = auto()
305    ILIKE_ANY = auto()
306    IN = auto()
307    INDEX = auto()
308    INNER = auto()
309    INSERT = auto()
310    INTERSECT = auto()
311    INTERVAL = auto()
312    INTO = auto()
313    INTRODUCER = auto()
314    IRLIKE = auto()
315    IS = auto()
316    ISNULL = auto()
317    JOIN = auto()
318    JOIN_MARKER = auto()
319    KEEP = auto()
320    KEY = auto()
321    KILL = auto()
322    LANGUAGE = auto()
323    LATERAL = auto()
324    LEFT = auto()
325    LIKE = auto()
326    LIKE_ANY = auto()
327    LIMIT = auto()
328    LIST = auto()
329    LOAD = auto()
330    LOCK = auto()
331    MAP = auto()
332    MATCH_CONDITION = auto()
333    MATCH_RECOGNIZE = auto()
334    MEMBER_OF = auto()
335    MERGE = auto()
336    MOD = auto()
337    MODEL = auto()
338    NATURAL = auto()
339    NEXT = auto()
340    NOTHING = auto()
341    NOTNULL = auto()
342    NULL = auto()
343    OBJECT_IDENTIFIER = auto()
344    OFFSET = auto()
345    ON = auto()
346    ONLY = auto()
347    OPERATOR = auto()
348    ORDER_BY = auto()
349    ORDER_SIBLINGS_BY = auto()
350    ORDERED = auto()
351    ORDINALITY = auto()
352    OUTER = auto()
353    OVER = auto()
354    OVERLAPS = auto()
355    OVERWRITE = auto()
356    PARTITION = auto()
357    PARTITION_BY = auto()
358    PERCENT = auto()
359    PIVOT = auto()
360    PLACEHOLDER = auto()
361    POSITIONAL = auto()
362    PRAGMA = auto()
363    PREWHERE = auto()
364    PRIMARY_KEY = auto()
365    PROCEDURE = auto()
366    PROPERTIES = auto()
367    PSEUDO_TYPE = auto()
368    PUT = auto()
369    QUALIFY = auto()
370    QUOTE = auto()
371    RANGE = auto()
372    RECURSIVE = auto()
373    REFRESH = auto()
374    RENAME = auto()
375    REPLACE = auto()
376    RETURNING = auto()
377    REFERENCES = auto()
378    RIGHT = auto()
379    RLIKE = auto()
380    ROLLBACK = auto()
381    ROLLUP = auto()
382    ROW = auto()
383    ROWS = auto()
384    SELECT = auto()
385    SEMI = auto()
386    SEPARATOR = auto()
387    SEQUENCE = auto()
388    SERDE_PROPERTIES = auto()
389    SET = auto()
390    SETTINGS = auto()
391    SHOW = auto()
392    SIMILAR_TO = auto()
393    SOME = auto()
394    SORT_BY = auto()
395    START_WITH = auto()
396    STORAGE_INTEGRATION = auto()
397    STRAIGHT_JOIN = auto()
398    STRUCT = auto()
399    SUMMARIZE = auto()
400    TABLE_SAMPLE = auto()
401    TAG = auto()
402    TEMPORARY = auto()
403    TOP = auto()
404    THEN = auto()
405    TRUE = auto()
406    TRUNCATE = auto()
407    UNCACHE = auto()
408    UNION = auto()
409    UNNEST = auto()
410    UNPIVOT = auto()
411    UPDATE = auto()
412    USE = auto()
413    USING = auto()
414    VALUES = auto()
415    VIEW = auto()
416    VOLATILE = auto()
417    WHEN = auto()
418    WHERE = auto()
419    WINDOW = auto()
420    WITH = auto()
421    UNIQUE = auto()
422    VERSION_SNAPSHOT = auto()
423    TIMESTAMP_SNAPSHOT = auto()
424    OPTION = auto()
425    SINK = auto()
426    SOURCE = auto()
427    ANALYZE = auto()
428    NAMESPACE = auto()
429    EXPORT = auto()

An enumeration.

L_PAREN = <TokenType.L_PAREN: 'L_PAREN'>
R_PAREN = <TokenType.R_PAREN: 'R_PAREN'>
L_BRACKET = <TokenType.L_BRACKET: 'L_BRACKET'>
R_BRACKET = <TokenType.R_BRACKET: 'R_BRACKET'>
L_BRACE = <TokenType.L_BRACE: 'L_BRACE'>
R_BRACE = <TokenType.R_BRACE: 'R_BRACE'>
COMMA = <TokenType.COMMA: 'COMMA'>
DOT = <TokenType.DOT: 'DOT'>
DASH = <TokenType.DASH: 'DASH'>
PLUS = <TokenType.PLUS: 'PLUS'>
COLON = <TokenType.COLON: 'COLON'>
DOTCOLON = <TokenType.DOTCOLON: 'DOTCOLON'>
DCOLON = <TokenType.DCOLON: 'DCOLON'>
DQMARK = <TokenType.DQMARK: 'DQMARK'>
SEMICOLON = <TokenType.SEMICOLON: 'SEMICOLON'>
STAR = <TokenType.STAR: 'STAR'>
BACKSLASH = <TokenType.BACKSLASH: 'BACKSLASH'>
SLASH = <TokenType.SLASH: 'SLASH'>
LT = <TokenType.LT: 'LT'>
LTE = <TokenType.LTE: 'LTE'>
GT = <TokenType.GT: 'GT'>
GTE = <TokenType.GTE: 'GTE'>
NOT = <TokenType.NOT: 'NOT'>
EQ = <TokenType.EQ: 'EQ'>
NEQ = <TokenType.NEQ: 'NEQ'>
NULLSAFE_EQ = <TokenType.NULLSAFE_EQ: 'NULLSAFE_EQ'>
COLON_EQ = <TokenType.COLON_EQ: 'COLON_EQ'>
AND = <TokenType.AND: 'AND'>
OR = <TokenType.OR: 'OR'>
AMP = <TokenType.AMP: 'AMP'>
DPIPE = <TokenType.DPIPE: 'DPIPE'>
PIPE_GT = <TokenType.PIPE_GT: 'PIPE_GT'>
PIPE = <TokenType.PIPE: 'PIPE'>
PIPE_SLASH = <TokenType.PIPE_SLASH: 'PIPE_SLASH'>
DPIPE_SLASH = <TokenType.DPIPE_SLASH: 'DPIPE_SLASH'>
CARET = <TokenType.CARET: 'CARET'>
CARET_AT = <TokenType.CARET_AT: 'CARET_AT'>
TILDA = <TokenType.TILDA: 'TILDA'>
ARROW = <TokenType.ARROW: 'ARROW'>
DARROW = <TokenType.DARROW: 'DARROW'>
FARROW = <TokenType.FARROW: 'FARROW'>
HASH = <TokenType.HASH: 'HASH'>
HASH_ARROW = <TokenType.HASH_ARROW: 'HASH_ARROW'>
DHASH_ARROW = <TokenType.DHASH_ARROW: 'DHASH_ARROW'>
LR_ARROW = <TokenType.LR_ARROW: 'LR_ARROW'>
DAT = <TokenType.DAT: 'DAT'>
LT_AT = <TokenType.LT_AT: 'LT_AT'>
AT_GT = <TokenType.AT_GT: 'AT_GT'>
DOLLAR = <TokenType.DOLLAR: 'DOLLAR'>
PARAMETER = <TokenType.PARAMETER: 'PARAMETER'>
SESSION_PARAMETER = <TokenType.SESSION_PARAMETER: 'SESSION_PARAMETER'>
DAMP = <TokenType.DAMP: 'DAMP'>
XOR = <TokenType.XOR: 'XOR'>
DSTAR = <TokenType.DSTAR: 'DSTAR'>
URI_START = <TokenType.URI_START: 'URI_START'>
BLOCK_START = <TokenType.BLOCK_START: 'BLOCK_START'>
BLOCK_END = <TokenType.BLOCK_END: 'BLOCK_END'>
SPACE = <TokenType.SPACE: 'SPACE'>
BREAK = <TokenType.BREAK: 'BREAK'>
STRING = <TokenType.STRING: 'STRING'>
NUMBER = <TokenType.NUMBER: 'NUMBER'>
IDENTIFIER = <TokenType.IDENTIFIER: 'IDENTIFIER'>
DATABASE = <TokenType.DATABASE: 'DATABASE'>
COLUMN = <TokenType.COLUMN: 'COLUMN'>
COLUMN_DEF = <TokenType.COLUMN_DEF: 'COLUMN_DEF'>
SCHEMA = <TokenType.SCHEMA: 'SCHEMA'>
TABLE = <TokenType.TABLE: 'TABLE'>
WAREHOUSE = <TokenType.WAREHOUSE: 'WAREHOUSE'>
STAGE = <TokenType.STAGE: 'STAGE'>
STREAMLIT = <TokenType.STREAMLIT: 'STREAMLIT'>
VAR = <TokenType.VAR: 'VAR'>
BIT_STRING = <TokenType.BIT_STRING: 'BIT_STRING'>
HEX_STRING = <TokenType.HEX_STRING: 'HEX_STRING'>
BYTE_STRING = <TokenType.BYTE_STRING: 'BYTE_STRING'>
NATIONAL_STRING = <TokenType.NATIONAL_STRING: 'NATIONAL_STRING'>
RAW_STRING = <TokenType.RAW_STRING: 'RAW_STRING'>
HEREDOC_STRING = <TokenType.HEREDOC_STRING: 'HEREDOC_STRING'>
UNICODE_STRING = <TokenType.UNICODE_STRING: 'UNICODE_STRING'>
BIT = <TokenType.BIT: 'BIT'>
BOOLEAN = <TokenType.BOOLEAN: 'BOOLEAN'>
TINYINT = <TokenType.TINYINT: 'TINYINT'>
UTINYINT = <TokenType.UTINYINT: 'UTINYINT'>
SMALLINT = <TokenType.SMALLINT: 'SMALLINT'>
USMALLINT = <TokenType.USMALLINT: 'USMALLINT'>
MEDIUMINT = <TokenType.MEDIUMINT: 'MEDIUMINT'>
UMEDIUMINT = <TokenType.UMEDIUMINT: 'UMEDIUMINT'>
INT = <TokenType.INT: 'INT'>
UINT = <TokenType.UINT: 'UINT'>
BIGINT = <TokenType.BIGINT: 'BIGINT'>
UBIGINT = <TokenType.UBIGINT: 'UBIGINT'>
INT128 = <TokenType.INT128: 'INT128'>
UINT128 = <TokenType.UINT128: 'UINT128'>
INT256 = <TokenType.INT256: 'INT256'>
UINT256 = <TokenType.UINT256: 'UINT256'>
FLOAT = <TokenType.FLOAT: 'FLOAT'>
DOUBLE = <TokenType.DOUBLE: 'DOUBLE'>
UDOUBLE = <TokenType.UDOUBLE: 'UDOUBLE'>
DECIMAL = <TokenType.DECIMAL: 'DECIMAL'>
DECIMAL32 = <TokenType.DECIMAL32: 'DECIMAL32'>
DECIMAL64 = <TokenType.DECIMAL64: 'DECIMAL64'>
DECIMAL128 = <TokenType.DECIMAL128: 'DECIMAL128'>
DECIMAL256 = <TokenType.DECIMAL256: 'DECIMAL256'>
UDECIMAL = <TokenType.UDECIMAL: 'UDECIMAL'>
BIGDECIMAL = <TokenType.BIGDECIMAL: 'BIGDECIMAL'>
CHAR = <TokenType.CHAR: 'CHAR'>
NCHAR = <TokenType.NCHAR: 'NCHAR'>
VARCHAR = <TokenType.VARCHAR: 'VARCHAR'>
NVARCHAR = <TokenType.NVARCHAR: 'NVARCHAR'>
BPCHAR = <TokenType.BPCHAR: 'BPCHAR'>
TEXT = <TokenType.TEXT: 'TEXT'>
MEDIUMTEXT = <TokenType.MEDIUMTEXT: 'MEDIUMTEXT'>
LONGTEXT = <TokenType.LONGTEXT: 'LONGTEXT'>
BLOB = <TokenType.BLOB: 'BLOB'>
MEDIUMBLOB = <TokenType.MEDIUMBLOB: 'MEDIUMBLOB'>
LONGBLOB = <TokenType.LONGBLOB: 'LONGBLOB'>
TINYBLOB = <TokenType.TINYBLOB: 'TINYBLOB'>
TINYTEXT = <TokenType.TINYTEXT: 'TINYTEXT'>
NAME = <TokenType.NAME: 'NAME'>
BINARY = <TokenType.BINARY: 'BINARY'>
VARBINARY = <TokenType.VARBINARY: 'VARBINARY'>
JSON = <TokenType.JSON: 'JSON'>
JSONB = <TokenType.JSONB: 'JSONB'>
TIME = <TokenType.TIME: 'TIME'>
TIMETZ = <TokenType.TIMETZ: 'TIMETZ'>
TIMESTAMP = <TokenType.TIMESTAMP: 'TIMESTAMP'>
TIMESTAMPTZ = <TokenType.TIMESTAMPTZ: 'TIMESTAMPTZ'>
TIMESTAMPLTZ = <TokenType.TIMESTAMPLTZ: 'TIMESTAMPLTZ'>
TIMESTAMPNTZ = <TokenType.TIMESTAMPNTZ: 'TIMESTAMPNTZ'>
TIMESTAMP_S = <TokenType.TIMESTAMP_S: 'TIMESTAMP_S'>
TIMESTAMP_MS = <TokenType.TIMESTAMP_MS: 'TIMESTAMP_MS'>
TIMESTAMP_NS = <TokenType.TIMESTAMP_NS: 'TIMESTAMP_NS'>
DATETIME = <TokenType.DATETIME: 'DATETIME'>
DATETIME2 = <TokenType.DATETIME2: 'DATETIME2'>
DATETIME64 = <TokenType.DATETIME64: 'DATETIME64'>
SMALLDATETIME = <TokenType.SMALLDATETIME: 'SMALLDATETIME'>
DATE = <TokenType.DATE: 'DATE'>
DATE32 = <TokenType.DATE32: 'DATE32'>
INT4RANGE = <TokenType.INT4RANGE: 'INT4RANGE'>
INT4MULTIRANGE = <TokenType.INT4MULTIRANGE: 'INT4MULTIRANGE'>
INT8RANGE = <TokenType.INT8RANGE: 'INT8RANGE'>
INT8MULTIRANGE = <TokenType.INT8MULTIRANGE: 'INT8MULTIRANGE'>
NUMRANGE = <TokenType.NUMRANGE: 'NUMRANGE'>
NUMMULTIRANGE = <TokenType.NUMMULTIRANGE: 'NUMMULTIRANGE'>
TSRANGE = <TokenType.TSRANGE: 'TSRANGE'>
TSMULTIRANGE = <TokenType.TSMULTIRANGE: 'TSMULTIRANGE'>
TSTZRANGE = <TokenType.TSTZRANGE: 'TSTZRANGE'>
TSTZMULTIRANGE = <TokenType.TSTZMULTIRANGE: 'TSTZMULTIRANGE'>
DATERANGE = <TokenType.DATERANGE: 'DATERANGE'>
DATEMULTIRANGE = <TokenType.DATEMULTIRANGE: 'DATEMULTIRANGE'>
UUID = <TokenType.UUID: 'UUID'>
GEOGRAPHY = <TokenType.GEOGRAPHY: 'GEOGRAPHY'>
NULLABLE = <TokenType.NULLABLE: 'NULLABLE'>
GEOMETRY = <TokenType.GEOMETRY: 'GEOMETRY'>
POINT = <TokenType.POINT: 'POINT'>
RING = <TokenType.RING: 'RING'>
LINESTRING = <TokenType.LINESTRING: 'LINESTRING'>
MULTILINESTRING = <TokenType.MULTILINESTRING: 'MULTILINESTRING'>
POLYGON = <TokenType.POLYGON: 'POLYGON'>
MULTIPOLYGON = <TokenType.MULTIPOLYGON: 'MULTIPOLYGON'>
HLLSKETCH = <TokenType.HLLSKETCH: 'HLLSKETCH'>
HSTORE = <TokenType.HSTORE: 'HSTORE'>
SUPER = <TokenType.SUPER: 'SUPER'>
SERIAL = <TokenType.SERIAL: 'SERIAL'>
SMALLSERIAL = <TokenType.SMALLSERIAL: 'SMALLSERIAL'>
BIGSERIAL = <TokenType.BIGSERIAL: 'BIGSERIAL'>
XML = <TokenType.XML: 'XML'>
YEAR = <TokenType.YEAR: 'YEAR'>
USERDEFINED = <TokenType.USERDEFINED: 'USERDEFINED'>
MONEY = <TokenType.MONEY: 'MONEY'>
SMALLMONEY = <TokenType.SMALLMONEY: 'SMALLMONEY'>
ROWVERSION = <TokenType.ROWVERSION: 'ROWVERSION'>
IMAGE = <TokenType.IMAGE: 'IMAGE'>
VARIANT = <TokenType.VARIANT: 'VARIANT'>
OBJECT = <TokenType.OBJECT: 'OBJECT'>
INET = <TokenType.INET: 'INET'>
IPADDRESS = <TokenType.IPADDRESS: 'IPADDRESS'>
IPPREFIX = <TokenType.IPPREFIX: 'IPPREFIX'>
IPV4 = <TokenType.IPV4: 'IPV4'>
IPV6 = <TokenType.IPV6: 'IPV6'>
ENUM = <TokenType.ENUM: 'ENUM'>
ENUM8 = <TokenType.ENUM8: 'ENUM8'>
ENUM16 = <TokenType.ENUM16: 'ENUM16'>
FIXEDSTRING = <TokenType.FIXEDSTRING: 'FIXEDSTRING'>
LOWCARDINALITY = <TokenType.LOWCARDINALITY: 'LOWCARDINALITY'>
NESTED = <TokenType.NESTED: 'NESTED'>
AGGREGATEFUNCTION = <TokenType.AGGREGATEFUNCTION: 'AGGREGATEFUNCTION'>
SIMPLEAGGREGATEFUNCTION = <TokenType.SIMPLEAGGREGATEFUNCTION: 'SIMPLEAGGREGATEFUNCTION'>
TDIGEST = <TokenType.TDIGEST: 'TDIGEST'>
UNKNOWN = <TokenType.UNKNOWN: 'UNKNOWN'>
VECTOR = <TokenType.VECTOR: 'VECTOR'>
DYNAMIC = <TokenType.DYNAMIC: 'DYNAMIC'>
VOID = <TokenType.VOID: 'VOID'>
ALIAS = <TokenType.ALIAS: 'ALIAS'>
ALTER = <TokenType.ALTER: 'ALTER'>
ALWAYS = <TokenType.ALWAYS: 'ALWAYS'>
ALL = <TokenType.ALL: 'ALL'>
ANTI = <TokenType.ANTI: 'ANTI'>
ANY = <TokenType.ANY: 'ANY'>
APPLY = <TokenType.APPLY: 'APPLY'>
ARRAY = <TokenType.ARRAY: 'ARRAY'>
ASC = <TokenType.ASC: 'ASC'>
ASOF = <TokenType.ASOF: 'ASOF'>
ATTACH = <TokenType.ATTACH: 'ATTACH'>
AUTO_INCREMENT = <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>
BEGIN = <TokenType.BEGIN: 'BEGIN'>
BETWEEN = <TokenType.BETWEEN: 'BETWEEN'>
BULK_COLLECT_INTO = <TokenType.BULK_COLLECT_INTO: 'BULK_COLLECT_INTO'>
CACHE = <TokenType.CACHE: 'CACHE'>
CASE = <TokenType.CASE: 'CASE'>
CHARACTER_SET = <TokenType.CHARACTER_SET: 'CHARACTER_SET'>
CLUSTER_BY = <TokenType.CLUSTER_BY: 'CLUSTER_BY'>
COLLATE = <TokenType.COLLATE: 'COLLATE'>
COMMAND = <TokenType.COMMAND: 'COMMAND'>
COMMENT = <TokenType.COMMENT: 'COMMENT'>
COMMIT = <TokenType.COMMIT: 'COMMIT'>
CONNECT_BY = <TokenType.CONNECT_BY: 'CONNECT_BY'>
CONSTRAINT = <TokenType.CONSTRAINT: 'CONSTRAINT'>
COPY = <TokenType.COPY: 'COPY'>
CREATE = <TokenType.CREATE: 'CREATE'>
CROSS = <TokenType.CROSS: 'CROSS'>
CUBE = <TokenType.CUBE: 'CUBE'>
CURRENT_DATE = <TokenType.CURRENT_DATE: 'CURRENT_DATE'>
CURRENT_DATETIME = <TokenType.CURRENT_DATETIME: 'CURRENT_DATETIME'>
CURRENT_SCHEMA = <TokenType.CURRENT_SCHEMA: 'CURRENT_SCHEMA'>
CURRENT_TIME = <TokenType.CURRENT_TIME: 'CURRENT_TIME'>
CURRENT_TIMESTAMP = <TokenType.CURRENT_TIMESTAMP: 'CURRENT_TIMESTAMP'>
CURRENT_USER = <TokenType.CURRENT_USER: 'CURRENT_USER'>
DECLARE = <TokenType.DECLARE: 'DECLARE'>
DEFAULT = <TokenType.DEFAULT: 'DEFAULT'>
DELETE = <TokenType.DELETE: 'DELETE'>
DESC = <TokenType.DESC: 'DESC'>
DESCRIBE = <TokenType.DESCRIBE: 'DESCRIBE'>
DETACH = <TokenType.DETACH: 'DETACH'>
DICTIONARY = <TokenType.DICTIONARY: 'DICTIONARY'>
DISTINCT = <TokenType.DISTINCT: 'DISTINCT'>
DISTRIBUTE_BY = <TokenType.DISTRIBUTE_BY: 'DISTRIBUTE_BY'>
DIV = <TokenType.DIV: 'DIV'>
DROP = <TokenType.DROP: 'DROP'>
ELSE = <TokenType.ELSE: 'ELSE'>
END = <TokenType.END: 'END'>
ESCAPE = <TokenType.ESCAPE: 'ESCAPE'>
EXCEPT = <TokenType.EXCEPT: 'EXCEPT'>
EXECUTE = <TokenType.EXECUTE: 'EXECUTE'>
EXISTS = <TokenType.EXISTS: 'EXISTS'>
FALSE = <TokenType.FALSE: 'FALSE'>
FETCH = <TokenType.FETCH: 'FETCH'>
FILE_FORMAT = <TokenType.FILE_FORMAT: 'FILE_FORMAT'>
FILTER = <TokenType.FILTER: 'FILTER'>
FINAL = <TokenType.FINAL: 'FINAL'>
FIRST = <TokenType.FIRST: 'FIRST'>
FOR = <TokenType.FOR: 'FOR'>
FORCE = <TokenType.FORCE: 'FORCE'>
FOREIGN_KEY = <TokenType.FOREIGN_KEY: 'FOREIGN_KEY'>
FORMAT = <TokenType.FORMAT: 'FORMAT'>
FROM = <TokenType.FROM: 'FROM'>
FULL = <TokenType.FULL: 'FULL'>
FUNCTION = <TokenType.FUNCTION: 'FUNCTION'>
GET = <TokenType.GET: 'GET'>
GLOB = <TokenType.GLOB: 'GLOB'>
GLOBAL = <TokenType.GLOBAL: 'GLOBAL'>
GRANT = <TokenType.GRANT: 'GRANT'>
GROUP_BY = <TokenType.GROUP_BY: 'GROUP_BY'>
GROUPING_SETS = <TokenType.GROUPING_SETS: 'GROUPING_SETS'>
HAVING = <TokenType.HAVING: 'HAVING'>
HINT = <TokenType.HINT: 'HINT'>
IGNORE = <TokenType.IGNORE: 'IGNORE'>
ILIKE = <TokenType.ILIKE: 'ILIKE'>
ILIKE_ANY = <TokenType.ILIKE_ANY: 'ILIKE_ANY'>
IN = <TokenType.IN: 'IN'>
INDEX = <TokenType.INDEX: 'INDEX'>
INNER = <TokenType.INNER: 'INNER'>
INSERT = <TokenType.INSERT: 'INSERT'>
INTERSECT = <TokenType.INTERSECT: 'INTERSECT'>
INTERVAL = <TokenType.INTERVAL: 'INTERVAL'>
INTO = <TokenType.INTO: 'INTO'>
INTRODUCER = <TokenType.INTRODUCER: 'INTRODUCER'>
IRLIKE = <TokenType.IRLIKE: 'IRLIKE'>
IS = <TokenType.IS: 'IS'>
ISNULL = <TokenType.ISNULL: 'ISNULL'>
JOIN = <TokenType.JOIN: 'JOIN'>
JOIN_MARKER = <TokenType.JOIN_MARKER: 'JOIN_MARKER'>
KEEP = <TokenType.KEEP: 'KEEP'>
KEY = <TokenType.KEY: 'KEY'>
KILL = <TokenType.KILL: 'KILL'>
LANGUAGE = <TokenType.LANGUAGE: 'LANGUAGE'>
LATERAL = <TokenType.LATERAL: 'LATERAL'>
LEFT = <TokenType.LEFT: 'LEFT'>
LIKE = <TokenType.LIKE: 'LIKE'>
LIKE_ANY = <TokenType.LIKE_ANY: 'LIKE_ANY'>
LIMIT = <TokenType.LIMIT: 'LIMIT'>
LIST = <TokenType.LIST: 'LIST'>
LOAD = <TokenType.LOAD: 'LOAD'>
LOCK = <TokenType.LOCK: 'LOCK'>
MAP = <TokenType.MAP: 'MAP'>
MATCH_CONDITION = <TokenType.MATCH_CONDITION: 'MATCH_CONDITION'>
MATCH_RECOGNIZE = <TokenType.MATCH_RECOGNIZE: 'MATCH_RECOGNIZE'>
MEMBER_OF = <TokenType.MEMBER_OF: 'MEMBER_OF'>
MERGE = <TokenType.MERGE: 'MERGE'>
MOD = <TokenType.MOD: 'MOD'>
MODEL = <TokenType.MODEL: 'MODEL'>
NATURAL = <TokenType.NATURAL: 'NATURAL'>
NEXT = <TokenType.NEXT: 'NEXT'>
NOTHING = <TokenType.NOTHING: 'NOTHING'>
NOTNULL = <TokenType.NOTNULL: 'NOTNULL'>
NULL = <TokenType.NULL: 'NULL'>
OBJECT_IDENTIFIER = <TokenType.OBJECT_IDENTIFIER: 'OBJECT_IDENTIFIER'>
OFFSET = <TokenType.OFFSET: 'OFFSET'>
ON = <TokenType.ON: 'ON'>
ONLY = <TokenType.ONLY: 'ONLY'>
OPERATOR = <TokenType.OPERATOR: 'OPERATOR'>
ORDER_BY = <TokenType.ORDER_BY: 'ORDER_BY'>
ORDER_SIBLINGS_BY = <TokenType.ORDER_SIBLINGS_BY: 'ORDER_SIBLINGS_BY'>
ORDERED = <TokenType.ORDERED: 'ORDERED'>
ORDINALITY = <TokenType.ORDINALITY: 'ORDINALITY'>
OUTER = <TokenType.OUTER: 'OUTER'>
OVER = <TokenType.OVER: 'OVER'>
OVERLAPS = <TokenType.OVERLAPS: 'OVERLAPS'>
OVERWRITE = <TokenType.OVERWRITE: 'OVERWRITE'>
PARTITION = <TokenType.PARTITION: 'PARTITION'>
PARTITION_BY = <TokenType.PARTITION_BY: 'PARTITION_BY'>
PERCENT = <TokenType.PERCENT: 'PERCENT'>
PIVOT = <TokenType.PIVOT: 'PIVOT'>
PLACEHOLDER = <TokenType.PLACEHOLDER: 'PLACEHOLDER'>
POSITIONAL = <TokenType.POSITIONAL: 'POSITIONAL'>
PRAGMA = <TokenType.PRAGMA: 'PRAGMA'>
PREWHERE = <TokenType.PREWHERE: 'PREWHERE'>
PRIMARY_KEY = <TokenType.PRIMARY_KEY: 'PRIMARY_KEY'>
PROCEDURE = <TokenType.PROCEDURE: 'PROCEDURE'>
PROPERTIES = <TokenType.PROPERTIES: 'PROPERTIES'>
PSEUDO_TYPE = <TokenType.PSEUDO_TYPE: 'PSEUDO_TYPE'>
PUT = <TokenType.PUT: 'PUT'>
QUALIFY = <TokenType.QUALIFY: 'QUALIFY'>
QUOTE = <TokenType.QUOTE: 'QUOTE'>
RANGE = <TokenType.RANGE: 'RANGE'>
RECURSIVE = <TokenType.RECURSIVE: 'RECURSIVE'>
REFRESH = <TokenType.REFRESH: 'REFRESH'>
RENAME = <TokenType.RENAME: 'RENAME'>
REPLACE = <TokenType.REPLACE: 'REPLACE'>
RETURNING = <TokenType.RETURNING: 'RETURNING'>
REFERENCES = <TokenType.REFERENCES: 'REFERENCES'>
RIGHT = <TokenType.RIGHT: 'RIGHT'>
RLIKE = <TokenType.RLIKE: 'RLIKE'>
ROLLBACK = <TokenType.ROLLBACK: 'ROLLBACK'>
ROLLUP = <TokenType.ROLLUP: 'ROLLUP'>
ROW = <TokenType.ROW: 'ROW'>
ROWS = <TokenType.ROWS: 'ROWS'>
SELECT = <TokenType.SELECT: 'SELECT'>
SEMI = <TokenType.SEMI: 'SEMI'>
SEPARATOR = <TokenType.SEPARATOR: 'SEPARATOR'>
SEQUENCE = <TokenType.SEQUENCE: 'SEQUENCE'>
SERDE_PROPERTIES = <TokenType.SERDE_PROPERTIES: 'SERDE_PROPERTIES'>
SET = <TokenType.SET: 'SET'>
SETTINGS = <TokenType.SETTINGS: 'SETTINGS'>
SHOW = <TokenType.SHOW: 'SHOW'>
SIMILAR_TO = <TokenType.SIMILAR_TO: 'SIMILAR_TO'>
SOME = <TokenType.SOME: 'SOME'>
SORT_BY = <TokenType.SORT_BY: 'SORT_BY'>
START_WITH = <TokenType.START_WITH: 'START_WITH'>
STORAGE_INTEGRATION = <TokenType.STORAGE_INTEGRATION: 'STORAGE_INTEGRATION'>
STRAIGHT_JOIN = <TokenType.STRAIGHT_JOIN: 'STRAIGHT_JOIN'>
STRUCT = <TokenType.STRUCT: 'STRUCT'>
SUMMARIZE = <TokenType.SUMMARIZE: 'SUMMARIZE'>
TABLE_SAMPLE = <TokenType.TABLE_SAMPLE: 'TABLE_SAMPLE'>
TAG = <TokenType.TAG: 'TAG'>
TEMPORARY = <TokenType.TEMPORARY: 'TEMPORARY'>
TOP = <TokenType.TOP: 'TOP'>
THEN = <TokenType.THEN: 'THEN'>
TRUE = <TokenType.TRUE: 'TRUE'>
TRUNCATE = <TokenType.TRUNCATE: 'TRUNCATE'>
UNCACHE = <TokenType.UNCACHE: 'UNCACHE'>
UNION = <TokenType.UNION: 'UNION'>
UNNEST = <TokenType.UNNEST: 'UNNEST'>
UNPIVOT = <TokenType.UNPIVOT: 'UNPIVOT'>
UPDATE = <TokenType.UPDATE: 'UPDATE'>
USE = <TokenType.USE: 'USE'>
USING = <TokenType.USING: 'USING'>
VALUES = <TokenType.VALUES: 'VALUES'>
VIEW = <TokenType.VIEW: 'VIEW'>
VOLATILE = <TokenType.VOLATILE: 'VOLATILE'>
WHEN = <TokenType.WHEN: 'WHEN'>
WHERE = <TokenType.WHERE: 'WHERE'>
WINDOW = <TokenType.WINDOW: 'WINDOW'>
WITH = <TokenType.WITH: 'WITH'>
UNIQUE = <TokenType.UNIQUE: 'UNIQUE'>
VERSION_SNAPSHOT = <TokenType.VERSION_SNAPSHOT: 'VERSION_SNAPSHOT'>
TIMESTAMP_SNAPSHOT = <TokenType.TIMESTAMP_SNAPSHOT: 'TIMESTAMP_SNAPSHOT'>
OPTION = <TokenType.OPTION: 'OPTION'>
SINK = <TokenType.SINK: 'SINK'>
SOURCE = <TokenType.SOURCE: 'SOURCE'>
ANALYZE = <TokenType.ANALYZE: 'ANALYZE'>
NAMESPACE = <TokenType.NAMESPACE: 'NAMESPACE'>
EXPORT = <TokenType.EXPORT: 'EXPORT'>
class Token:
436class Token:
437    __slots__ = ("token_type", "text", "line", "col", "start", "end", "comments")
438
439    @classmethod
440    def number(cls, number: int) -> Token:
441        """Returns a NUMBER token with `number` as its text."""
442        return cls(TokenType.NUMBER, str(number))
443
444    @classmethod
445    def string(cls, string: str) -> Token:
446        """Returns a STRING token with `string` as its text."""
447        return cls(TokenType.STRING, string)
448
449    @classmethod
450    def identifier(cls, identifier: str) -> Token:
451        """Returns an IDENTIFIER token with `identifier` as its text."""
452        return cls(TokenType.IDENTIFIER, identifier)
453
454    @classmethod
455    def var(cls, var: str) -> Token:
456        """Returns an VAR token with `var` as its text."""
457        return cls(TokenType.VAR, var)
458
459    def __init__(
460        self,
461        token_type: TokenType,
462        text: str,
463        line: int = 1,
464        col: int = 1,
465        start: int = 0,
466        end: int = 0,
467        comments: t.Optional[t.List[str]] = None,
468    ) -> None:
469        """Token initializer.
470
471        Args:
472            token_type: The TokenType Enum.
473            text: The text of the token.
474            line: The line that the token ends on.
475            col: The column that the token ends on.
476            start: The start index of the token.
477            end: The ending index of the token.
478            comments: The comments to attach to the token.
479        """
480        self.token_type = token_type
481        self.text = text
482        self.line = line
483        self.col = col
484        self.start = start
485        self.end = end
486        self.comments = [] if comments is None else comments
487
488    def __repr__(self) -> str:
489        attributes = ", ".join(f"{k}: {getattr(self, k)}" for k in self.__slots__)
490        return f"<Token {attributes}>"
Token( token_type: TokenType, text: str, line: int = 1, col: int = 1, start: int = 0, end: int = 0, comments: Optional[List[str]] = None)
459    def __init__(
460        self,
461        token_type: TokenType,
462        text: str,
463        line: int = 1,
464        col: int = 1,
465        start: int = 0,
466        end: int = 0,
467        comments: t.Optional[t.List[str]] = None,
468    ) -> None:
469        """Token initializer.
470
471        Args:
472            token_type: The TokenType Enum.
473            text: The text of the token.
474            line: The line that the token ends on.
475            col: The column that the token ends on.
476            start: The start index of the token.
477            end: The ending index of the token.
478            comments: The comments to attach to the token.
479        """
480        self.token_type = token_type
481        self.text = text
482        self.line = line
483        self.col = col
484        self.start = start
485        self.end = end
486        self.comments = [] if comments is None else comments

Token initializer.

Arguments:
  • token_type: The TokenType Enum.
  • text: The text of the token.
  • line: The line that the token ends on.
  • col: The column that the token ends on.
  • start: The start index of the token.
  • end: The ending index of the token.
  • comments: The comments to attach to the token.
@classmethod
def number(cls, number: int) -> Token:
439    @classmethod
440    def number(cls, number: int) -> Token:
441        """Returns a NUMBER token with `number` as its text."""
442        return cls(TokenType.NUMBER, str(number))

Returns a NUMBER token with number as its text.

@classmethod
def string(cls, string: str) -> Token:
444    @classmethod
445    def string(cls, string: str) -> Token:
446        """Returns a STRING token with `string` as its text."""
447        return cls(TokenType.STRING, string)

Returns a STRING token with string as its text.

@classmethod
def identifier(cls, identifier: str) -> Token:
449    @classmethod
450    def identifier(cls, identifier: str) -> Token:
451        """Returns an IDENTIFIER token with `identifier` as its text."""
452        return cls(TokenType.IDENTIFIER, identifier)

Returns an IDENTIFIER token with identifier as its text.

@classmethod
def var(cls, var: str) -> Token:
454    @classmethod
455    def var(cls, var: str) -> Token:
456        """Returns an VAR token with `var` as its text."""
457        return cls(TokenType.VAR, var)

Returns an VAR token with var as its text.

token_type
text
line
col
start
end
comments
class Tokenizer:
 600class Tokenizer(metaclass=_Tokenizer):
 601    SINGLE_TOKENS = {
 602        "(": TokenType.L_PAREN,
 603        ")": TokenType.R_PAREN,
 604        "[": TokenType.L_BRACKET,
 605        "]": TokenType.R_BRACKET,
 606        "{": TokenType.L_BRACE,
 607        "}": TokenType.R_BRACE,
 608        "&": TokenType.AMP,
 609        "^": TokenType.CARET,
 610        ":": TokenType.COLON,
 611        ",": TokenType.COMMA,
 612        ".": TokenType.DOT,
 613        "-": TokenType.DASH,
 614        "=": TokenType.EQ,
 615        ">": TokenType.GT,
 616        "<": TokenType.LT,
 617        "%": TokenType.MOD,
 618        "!": TokenType.NOT,
 619        "|": TokenType.PIPE,
 620        "+": TokenType.PLUS,
 621        ";": TokenType.SEMICOLON,
 622        "/": TokenType.SLASH,
 623        "\\": TokenType.BACKSLASH,
 624        "*": TokenType.STAR,
 625        "~": TokenType.TILDA,
 626        "?": TokenType.PLACEHOLDER,
 627        "@": TokenType.PARAMETER,
 628        "#": TokenType.HASH,
 629        # Used for breaking a var like x'y' but nothing else the token type doesn't matter
 630        "'": TokenType.UNKNOWN,
 631        "`": TokenType.UNKNOWN,
 632        '"': TokenType.UNKNOWN,
 633    }
 634
 635    BIT_STRINGS: t.List[str | t.Tuple[str, str]] = []
 636    BYTE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 637    HEX_STRINGS: t.List[str | t.Tuple[str, str]] = []
 638    RAW_STRINGS: t.List[str | t.Tuple[str, str]] = []
 639    HEREDOC_STRINGS: t.List[str | t.Tuple[str, str]] = []
 640    UNICODE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 641    IDENTIFIERS: t.List[str | t.Tuple[str, str]] = ['"']
 642    QUOTES: t.List[t.Tuple[str, str] | str] = ["'"]
 643    STRING_ESCAPES = ["'"]
 644    VAR_SINGLE_TOKENS: t.Set[str] = set()
 645
 646    # The strings in this list can always be used as escapes, regardless of the surrounding
 647    # identifier delimiters. By default, the closing delimiter is assumed to also act as an
 648    # identifier escape, e.g. if we use double-quotes, then they also act as escapes: "x"""
 649    IDENTIFIER_ESCAPES: t.List[str] = []
 650
 651    # Whether the heredoc tags follow the same lexical rules as unquoted identifiers
 652    HEREDOC_TAG_IS_IDENTIFIER = False
 653
 654    # Token that we'll generate as a fallback if the heredoc prefix doesn't correspond to a heredoc
 655    HEREDOC_STRING_ALTERNATIVE = TokenType.VAR
 656
 657    # Whether string escape characters function as such when placed within raw strings
 658    STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS = True
 659
 660    NESTED_COMMENTS = True
 661
 662    HINT_START = "/*+"
 663
 664    TOKENS_PRECEDING_HINT = {TokenType.SELECT, TokenType.INSERT, TokenType.UPDATE, TokenType.DELETE}
 665
 666    # Autofilled
 667    _COMMENTS: t.Dict[str, str] = {}
 668    _FORMAT_STRINGS: t.Dict[str, t.Tuple[str, TokenType]] = {}
 669    _IDENTIFIERS: t.Dict[str, str] = {}
 670    _IDENTIFIER_ESCAPES: t.Set[str] = set()
 671    _QUOTES: t.Dict[str, str] = {}
 672    _STRING_ESCAPES: t.Set[str] = set()
 673    _KEYWORD_TRIE: t.Dict = {}
 674    _RS_TOKENIZER: t.Optional[t.Any] = None
 675
 676    KEYWORDS: t.Dict[str, TokenType] = {
 677        **{f"{{%{postfix}": TokenType.BLOCK_START for postfix in ("", "+", "-")},
 678        **{f"{prefix}%}}": TokenType.BLOCK_END for prefix in ("", "+", "-")},
 679        **{f"{{{{{postfix}": TokenType.BLOCK_START for postfix in ("+", "-")},
 680        **{f"{prefix}}}}}": TokenType.BLOCK_END for prefix in ("+", "-")},
 681        HINT_START: TokenType.HINT,
 682        "==": TokenType.EQ,
 683        "::": TokenType.DCOLON,
 684        "||": TokenType.DPIPE,
 685        "|>": TokenType.PIPE_GT,
 686        ">=": TokenType.GTE,
 687        "<=": TokenType.LTE,
 688        "<>": TokenType.NEQ,
 689        "!=": TokenType.NEQ,
 690        ":=": TokenType.COLON_EQ,
 691        "<=>": TokenType.NULLSAFE_EQ,
 692        "->": TokenType.ARROW,
 693        "->>": TokenType.DARROW,
 694        "=>": TokenType.FARROW,
 695        "#>": TokenType.HASH_ARROW,
 696        "#>>": TokenType.DHASH_ARROW,
 697        "<->": TokenType.LR_ARROW,
 698        "&&": TokenType.DAMP,
 699        "??": TokenType.DQMARK,
 700        "~~~": TokenType.GLOB,
 701        "~~": TokenType.LIKE,
 702        "~~*": TokenType.ILIKE,
 703        "~*": TokenType.IRLIKE,
 704        "ALL": TokenType.ALL,
 705        "ALWAYS": TokenType.ALWAYS,
 706        "AND": TokenType.AND,
 707        "ANTI": TokenType.ANTI,
 708        "ANY": TokenType.ANY,
 709        "ASC": TokenType.ASC,
 710        "AS": TokenType.ALIAS,
 711        "ASOF": TokenType.ASOF,
 712        "AUTOINCREMENT": TokenType.AUTO_INCREMENT,
 713        "AUTO_INCREMENT": TokenType.AUTO_INCREMENT,
 714        "BEGIN": TokenType.BEGIN,
 715        "BETWEEN": TokenType.BETWEEN,
 716        "CACHE": TokenType.CACHE,
 717        "UNCACHE": TokenType.UNCACHE,
 718        "CASE": TokenType.CASE,
 719        "CHARACTER SET": TokenType.CHARACTER_SET,
 720        "CLUSTER BY": TokenType.CLUSTER_BY,
 721        "COLLATE": TokenType.COLLATE,
 722        "COLUMN": TokenType.COLUMN,
 723        "COMMIT": TokenType.COMMIT,
 724        "CONNECT BY": TokenType.CONNECT_BY,
 725        "CONSTRAINT": TokenType.CONSTRAINT,
 726        "COPY": TokenType.COPY,
 727        "CREATE": TokenType.CREATE,
 728        "CROSS": TokenType.CROSS,
 729        "CUBE": TokenType.CUBE,
 730        "CURRENT_DATE": TokenType.CURRENT_DATE,
 731        "CURRENT_SCHEMA": TokenType.CURRENT_SCHEMA,
 732        "CURRENT_TIME": TokenType.CURRENT_TIME,
 733        "CURRENT_TIMESTAMP": TokenType.CURRENT_TIMESTAMP,
 734        "CURRENT_USER": TokenType.CURRENT_USER,
 735        "DATABASE": TokenType.DATABASE,
 736        "DEFAULT": TokenType.DEFAULT,
 737        "DELETE": TokenType.DELETE,
 738        "DESC": TokenType.DESC,
 739        "DESCRIBE": TokenType.DESCRIBE,
 740        "DISTINCT": TokenType.DISTINCT,
 741        "DISTRIBUTE BY": TokenType.DISTRIBUTE_BY,
 742        "DIV": TokenType.DIV,
 743        "DROP": TokenType.DROP,
 744        "ELSE": TokenType.ELSE,
 745        "END": TokenType.END,
 746        "ENUM": TokenType.ENUM,
 747        "ESCAPE": TokenType.ESCAPE,
 748        "EXCEPT": TokenType.EXCEPT,
 749        "EXECUTE": TokenType.EXECUTE,
 750        "EXISTS": TokenType.EXISTS,
 751        "FALSE": TokenType.FALSE,
 752        "FETCH": TokenType.FETCH,
 753        "FILTER": TokenType.FILTER,
 754        "FIRST": TokenType.FIRST,
 755        "FULL": TokenType.FULL,
 756        "FUNCTION": TokenType.FUNCTION,
 757        "FOR": TokenType.FOR,
 758        "FOREIGN KEY": TokenType.FOREIGN_KEY,
 759        "FORMAT": TokenType.FORMAT,
 760        "FROM": TokenType.FROM,
 761        "GEOGRAPHY": TokenType.GEOGRAPHY,
 762        "GEOMETRY": TokenType.GEOMETRY,
 763        "GLOB": TokenType.GLOB,
 764        "GROUP BY": TokenType.GROUP_BY,
 765        "GROUPING SETS": TokenType.GROUPING_SETS,
 766        "HAVING": TokenType.HAVING,
 767        "ILIKE": TokenType.ILIKE,
 768        "IN": TokenType.IN,
 769        "INDEX": TokenType.INDEX,
 770        "INET": TokenType.INET,
 771        "INNER": TokenType.INNER,
 772        "INSERT": TokenType.INSERT,
 773        "INTERVAL": TokenType.INTERVAL,
 774        "INTERSECT": TokenType.INTERSECT,
 775        "INTO": TokenType.INTO,
 776        "IS": TokenType.IS,
 777        "ISNULL": TokenType.ISNULL,
 778        "JOIN": TokenType.JOIN,
 779        "KEEP": TokenType.KEEP,
 780        "KILL": TokenType.KILL,
 781        "LATERAL": TokenType.LATERAL,
 782        "LEFT": TokenType.LEFT,
 783        "LIKE": TokenType.LIKE,
 784        "LIMIT": TokenType.LIMIT,
 785        "LOAD": TokenType.LOAD,
 786        "LOCK": TokenType.LOCK,
 787        "MERGE": TokenType.MERGE,
 788        "NAMESPACE": TokenType.NAMESPACE,
 789        "NATURAL": TokenType.NATURAL,
 790        "NEXT": TokenType.NEXT,
 791        "NOT": TokenType.NOT,
 792        "NOTNULL": TokenType.NOTNULL,
 793        "NULL": TokenType.NULL,
 794        "OBJECT": TokenType.OBJECT,
 795        "OFFSET": TokenType.OFFSET,
 796        "ON": TokenType.ON,
 797        "OR": TokenType.OR,
 798        "XOR": TokenType.XOR,
 799        "ORDER BY": TokenType.ORDER_BY,
 800        "ORDINALITY": TokenType.ORDINALITY,
 801        "OUTER": TokenType.OUTER,
 802        "OVER": TokenType.OVER,
 803        "OVERLAPS": TokenType.OVERLAPS,
 804        "OVERWRITE": TokenType.OVERWRITE,
 805        "PARTITION": TokenType.PARTITION,
 806        "PARTITION BY": TokenType.PARTITION_BY,
 807        "PARTITIONED BY": TokenType.PARTITION_BY,
 808        "PARTITIONED_BY": TokenType.PARTITION_BY,
 809        "PERCENT": TokenType.PERCENT,
 810        "PIVOT": TokenType.PIVOT,
 811        "PRAGMA": TokenType.PRAGMA,
 812        "PRIMARY KEY": TokenType.PRIMARY_KEY,
 813        "PROCEDURE": TokenType.PROCEDURE,
 814        "QUALIFY": TokenType.QUALIFY,
 815        "RANGE": TokenType.RANGE,
 816        "RECURSIVE": TokenType.RECURSIVE,
 817        "REGEXP": TokenType.RLIKE,
 818        "RENAME": TokenType.RENAME,
 819        "REPLACE": TokenType.REPLACE,
 820        "RETURNING": TokenType.RETURNING,
 821        "REFERENCES": TokenType.REFERENCES,
 822        "RIGHT": TokenType.RIGHT,
 823        "RLIKE": TokenType.RLIKE,
 824        "ROLLBACK": TokenType.ROLLBACK,
 825        "ROLLUP": TokenType.ROLLUP,
 826        "ROW": TokenType.ROW,
 827        "ROWS": TokenType.ROWS,
 828        "SCHEMA": TokenType.SCHEMA,
 829        "SELECT": TokenType.SELECT,
 830        "SEMI": TokenType.SEMI,
 831        "SET": TokenType.SET,
 832        "SETTINGS": TokenType.SETTINGS,
 833        "SHOW": TokenType.SHOW,
 834        "SIMILAR TO": TokenType.SIMILAR_TO,
 835        "SOME": TokenType.SOME,
 836        "SORT BY": TokenType.SORT_BY,
 837        "START WITH": TokenType.START_WITH,
 838        "STRAIGHT_JOIN": TokenType.STRAIGHT_JOIN,
 839        "TABLE": TokenType.TABLE,
 840        "TABLESAMPLE": TokenType.TABLE_SAMPLE,
 841        "TEMP": TokenType.TEMPORARY,
 842        "TEMPORARY": TokenType.TEMPORARY,
 843        "THEN": TokenType.THEN,
 844        "TRUE": TokenType.TRUE,
 845        "TRUNCATE": TokenType.TRUNCATE,
 846        "UNION": TokenType.UNION,
 847        "UNKNOWN": TokenType.UNKNOWN,
 848        "UNNEST": TokenType.UNNEST,
 849        "UNPIVOT": TokenType.UNPIVOT,
 850        "UPDATE": TokenType.UPDATE,
 851        "USE": TokenType.USE,
 852        "USING": TokenType.USING,
 853        "UUID": TokenType.UUID,
 854        "VALUES": TokenType.VALUES,
 855        "VIEW": TokenType.VIEW,
 856        "VOLATILE": TokenType.VOLATILE,
 857        "WHEN": TokenType.WHEN,
 858        "WHERE": TokenType.WHERE,
 859        "WINDOW": TokenType.WINDOW,
 860        "WITH": TokenType.WITH,
 861        "APPLY": TokenType.APPLY,
 862        "ARRAY": TokenType.ARRAY,
 863        "BIT": TokenType.BIT,
 864        "BOOL": TokenType.BOOLEAN,
 865        "BOOLEAN": TokenType.BOOLEAN,
 866        "BYTE": TokenType.TINYINT,
 867        "MEDIUMINT": TokenType.MEDIUMINT,
 868        "INT1": TokenType.TINYINT,
 869        "TINYINT": TokenType.TINYINT,
 870        "INT16": TokenType.SMALLINT,
 871        "SHORT": TokenType.SMALLINT,
 872        "SMALLINT": TokenType.SMALLINT,
 873        "HUGEINT": TokenType.INT128,
 874        "UHUGEINT": TokenType.UINT128,
 875        "INT2": TokenType.SMALLINT,
 876        "INTEGER": TokenType.INT,
 877        "INT": TokenType.INT,
 878        "INT4": TokenType.INT,
 879        "INT32": TokenType.INT,
 880        "INT64": TokenType.BIGINT,
 881        "INT128": TokenType.INT128,
 882        "INT256": TokenType.INT256,
 883        "LONG": TokenType.BIGINT,
 884        "BIGINT": TokenType.BIGINT,
 885        "INT8": TokenType.TINYINT,
 886        "UINT": TokenType.UINT,
 887        "UINT128": TokenType.UINT128,
 888        "UINT256": TokenType.UINT256,
 889        "DEC": TokenType.DECIMAL,
 890        "DECIMAL": TokenType.DECIMAL,
 891        "DECIMAL32": TokenType.DECIMAL32,
 892        "DECIMAL64": TokenType.DECIMAL64,
 893        "DECIMAL128": TokenType.DECIMAL128,
 894        "DECIMAL256": TokenType.DECIMAL256,
 895        "BIGDECIMAL": TokenType.BIGDECIMAL,
 896        "BIGNUMERIC": TokenType.BIGDECIMAL,
 897        "LIST": TokenType.LIST,
 898        "MAP": TokenType.MAP,
 899        "NULLABLE": TokenType.NULLABLE,
 900        "NUMBER": TokenType.DECIMAL,
 901        "NUMERIC": TokenType.DECIMAL,
 902        "FIXED": TokenType.DECIMAL,
 903        "REAL": TokenType.FLOAT,
 904        "FLOAT": TokenType.FLOAT,
 905        "FLOAT4": TokenType.FLOAT,
 906        "FLOAT8": TokenType.DOUBLE,
 907        "DOUBLE": TokenType.DOUBLE,
 908        "DOUBLE PRECISION": TokenType.DOUBLE,
 909        "JSON": TokenType.JSON,
 910        "JSONB": TokenType.JSONB,
 911        "CHAR": TokenType.CHAR,
 912        "CHARACTER": TokenType.CHAR,
 913        "CHAR VARYING": TokenType.VARCHAR,
 914        "CHARACTER VARYING": TokenType.VARCHAR,
 915        "NCHAR": TokenType.NCHAR,
 916        "VARCHAR": TokenType.VARCHAR,
 917        "VARCHAR2": TokenType.VARCHAR,
 918        "NVARCHAR": TokenType.NVARCHAR,
 919        "NVARCHAR2": TokenType.NVARCHAR,
 920        "BPCHAR": TokenType.BPCHAR,
 921        "STR": TokenType.TEXT,
 922        "STRING": TokenType.TEXT,
 923        "TEXT": TokenType.TEXT,
 924        "LONGTEXT": TokenType.LONGTEXT,
 925        "MEDIUMTEXT": TokenType.MEDIUMTEXT,
 926        "TINYTEXT": TokenType.TINYTEXT,
 927        "CLOB": TokenType.TEXT,
 928        "LONGVARCHAR": TokenType.TEXT,
 929        "BINARY": TokenType.BINARY,
 930        "BLOB": TokenType.VARBINARY,
 931        "LONGBLOB": TokenType.LONGBLOB,
 932        "MEDIUMBLOB": TokenType.MEDIUMBLOB,
 933        "TINYBLOB": TokenType.TINYBLOB,
 934        "BYTEA": TokenType.VARBINARY,
 935        "VARBINARY": TokenType.VARBINARY,
 936        "TIME": TokenType.TIME,
 937        "TIMETZ": TokenType.TIMETZ,
 938        "TIMESTAMP": TokenType.TIMESTAMP,
 939        "TIMESTAMPTZ": TokenType.TIMESTAMPTZ,
 940        "TIMESTAMPLTZ": TokenType.TIMESTAMPLTZ,
 941        "TIMESTAMP_LTZ": TokenType.TIMESTAMPLTZ,
 942        "TIMESTAMPNTZ": TokenType.TIMESTAMPNTZ,
 943        "TIMESTAMP_NTZ": TokenType.TIMESTAMPNTZ,
 944        "DATE": TokenType.DATE,
 945        "DATETIME": TokenType.DATETIME,
 946        "INT4RANGE": TokenType.INT4RANGE,
 947        "INT4MULTIRANGE": TokenType.INT4MULTIRANGE,
 948        "INT8RANGE": TokenType.INT8RANGE,
 949        "INT8MULTIRANGE": TokenType.INT8MULTIRANGE,
 950        "NUMRANGE": TokenType.NUMRANGE,
 951        "NUMMULTIRANGE": TokenType.NUMMULTIRANGE,
 952        "TSRANGE": TokenType.TSRANGE,
 953        "TSMULTIRANGE": TokenType.TSMULTIRANGE,
 954        "TSTZRANGE": TokenType.TSTZRANGE,
 955        "TSTZMULTIRANGE": TokenType.TSTZMULTIRANGE,
 956        "DATERANGE": TokenType.DATERANGE,
 957        "DATEMULTIRANGE": TokenType.DATEMULTIRANGE,
 958        "UNIQUE": TokenType.UNIQUE,
 959        "VECTOR": TokenType.VECTOR,
 960        "STRUCT": TokenType.STRUCT,
 961        "SEQUENCE": TokenType.SEQUENCE,
 962        "VARIANT": TokenType.VARIANT,
 963        "ALTER": TokenType.ALTER,
 964        "ANALYZE": TokenType.ANALYZE,
 965        "CALL": TokenType.COMMAND,
 966        "COMMENT": TokenType.COMMENT,
 967        "EXPLAIN": TokenType.COMMAND,
 968        "GRANT": TokenType.GRANT,
 969        "OPTIMIZE": TokenType.COMMAND,
 970        "PREPARE": TokenType.COMMAND,
 971        "VACUUM": TokenType.COMMAND,
 972        "USER-DEFINED": TokenType.USERDEFINED,
 973        "FOR VERSION": TokenType.VERSION_SNAPSHOT,
 974        "FOR TIMESTAMP": TokenType.TIMESTAMP_SNAPSHOT,
 975    }
 976
 977    WHITE_SPACE: t.Dict[t.Optional[str], TokenType] = {
 978        " ": TokenType.SPACE,
 979        "\t": TokenType.SPACE,
 980        "\n": TokenType.BREAK,
 981        "\r": TokenType.BREAK,
 982    }
 983
 984    COMMANDS = {
 985        TokenType.COMMAND,
 986        TokenType.EXECUTE,
 987        TokenType.FETCH,
 988        TokenType.SHOW,
 989        TokenType.RENAME,
 990    }
 991
 992    COMMAND_PREFIX_TOKENS = {TokenType.SEMICOLON, TokenType.BEGIN}
 993
 994    # Handle numeric literals like in hive (3L = BIGINT)
 995    NUMERIC_LITERALS: t.Dict[str, str] = {}
 996
 997    COMMENTS = ["--", ("/*", "*/")]
 998
 999    __slots__ = (
1000        "sql",
1001        "size",
1002        "tokens",
1003        "dialect",
1004        "use_rs_tokenizer",
1005        "_start",
1006        "_current",
1007        "_line",
1008        "_col",
1009        "_comments",
1010        "_char",
1011        "_end",
1012        "_peek",
1013        "_prev_token_line",
1014        "_rs_dialect_settings",
1015    )
1016
1017    def __init__(
1018        self, dialect: DialectType = None, use_rs_tokenizer: t.Optional[bool] = None
1019    ) -> None:
1020        from sqlglot.dialects import Dialect
1021
1022        self.dialect = Dialect.get_or_raise(dialect)
1023
1024        # initialize `use_rs_tokenizer`, and allow it to be overwritten per Tokenizer instance
1025        self.use_rs_tokenizer = (
1026            use_rs_tokenizer if use_rs_tokenizer is not None else USE_RS_TOKENIZER
1027        )
1028
1029        if self.use_rs_tokenizer:
1030            self._rs_dialect_settings = RsTokenizerDialectSettings(
1031                unescaped_sequences=self.dialect.UNESCAPED_SEQUENCES,
1032                identifiers_can_start_with_digit=self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT,
1033                numbers_can_be_underscore_separated=self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED,
1034            )
1035
1036        self.reset()
1037
1038    def reset(self) -> None:
1039        self.sql = ""
1040        self.size = 0
1041        self.tokens: t.List[Token] = []
1042        self._start = 0
1043        self._current = 0
1044        self._line = 1
1045        self._col = 0
1046        self._comments: t.List[str] = []
1047
1048        self._char = ""
1049        self._end = False
1050        self._peek = ""
1051        self._prev_token_line = -1
1052
1053    def tokenize(self, sql: str) -> t.List[Token]:
1054        """Returns a list of tokens corresponding to the SQL string `sql`."""
1055        if self.use_rs_tokenizer:
1056            return self.tokenize_rs(sql)
1057
1058        self.reset()
1059        self.sql = sql
1060        self.size = len(sql)
1061
1062        try:
1063            self._scan()
1064        except Exception as e:
1065            start = max(self._current - 50, 0)
1066            end = min(self._current + 50, self.size - 1)
1067            context = self.sql[start:end]
1068            raise TokenError(f"Error tokenizing '{context}'") from e
1069
1070        return self.tokens
1071
1072    def _scan(self, until: t.Optional[t.Callable] = None) -> None:
1073        while self.size and not self._end:
1074            current = self._current
1075
1076            # Skip spaces here rather than iteratively calling advance() for performance reasons
1077            while current < self.size:
1078                char = self.sql[current]
1079
1080                if char.isspace() and (char == " " or char == "\t"):
1081                    current += 1
1082                else:
1083                    break
1084
1085            offset = current - self._current if current > self._current else 1
1086
1087            self._start = current
1088            self._advance(offset)
1089
1090            if not self._char.isspace():
1091                if self._char.isdigit():
1092                    self._scan_number()
1093                elif self._char in self._IDENTIFIERS:
1094                    self._scan_identifier(self._IDENTIFIERS[self._char])
1095                else:
1096                    self._scan_keywords()
1097
1098            if until and until():
1099                break
1100
1101        if self.tokens and self._comments:
1102            self.tokens[-1].comments.extend(self._comments)
1103
1104    def _chars(self, size: int) -> str:
1105        if size == 1:
1106            return self._char
1107
1108        start = self._current - 1
1109        end = start + size
1110
1111        return self.sql[start:end] if end <= self.size else ""
1112
1113    def _advance(self, i: int = 1, alnum: bool = False) -> None:
1114        if self.WHITE_SPACE.get(self._char) is TokenType.BREAK:
1115            # Ensures we don't count an extra line if we get a \r\n line break sequence
1116            if not (self._char == "\r" and self._peek == "\n"):
1117                self._col = i
1118                self._line += 1
1119        else:
1120            self._col += i
1121
1122        self._current += i
1123        self._end = self._current >= self.size
1124        self._char = self.sql[self._current - 1]
1125        self._peek = "" if self._end else self.sql[self._current]
1126
1127        if alnum and self._char.isalnum():
1128            # Here we use local variables instead of attributes for better performance
1129            _col = self._col
1130            _current = self._current
1131            _end = self._end
1132            _peek = self._peek
1133
1134            while _peek.isalnum():
1135                _col += 1
1136                _current += 1
1137                _end = _current >= self.size
1138                _peek = "" if _end else self.sql[_current]
1139
1140            self._col = _col
1141            self._current = _current
1142            self._end = _end
1143            self._peek = _peek
1144            self._char = self.sql[_current - 1]
1145
1146    @property
1147    def _text(self) -> str:
1148        return self.sql[self._start : self._current]
1149
1150    def _add(self, token_type: TokenType, text: t.Optional[str] = None) -> None:
1151        self._prev_token_line = self._line
1152
1153        if self._comments and token_type == TokenType.SEMICOLON and self.tokens:
1154            self.tokens[-1].comments.extend(self._comments)
1155            self._comments = []
1156
1157        self.tokens.append(
1158            Token(
1159                token_type,
1160                text=self._text if text is None else text,
1161                line=self._line,
1162                col=self._col,
1163                start=self._start,
1164                end=self._current - 1,
1165                comments=self._comments,
1166            )
1167        )
1168        self._comments = []
1169
1170        # If we have either a semicolon or a begin token before the command's token, we'll parse
1171        # whatever follows the command's token as a string
1172        if (
1173            token_type in self.COMMANDS
1174            and self._peek != ";"
1175            and (len(self.tokens) == 1 or self.tokens[-2].token_type in self.COMMAND_PREFIX_TOKENS)
1176        ):
1177            start = self._current
1178            tokens = len(self.tokens)
1179            self._scan(lambda: self._peek == ";")
1180            self.tokens = self.tokens[:tokens]
1181            text = self.sql[start : self._current].strip()
1182            if text:
1183                self._add(TokenType.STRING, text)
1184
1185    def _scan_keywords(self) -> None:
1186        size = 0
1187        word = None
1188        chars = self._text
1189        char = chars
1190        prev_space = False
1191        skip = False
1192        trie = self._KEYWORD_TRIE
1193        single_token = char in self.SINGLE_TOKENS
1194
1195        while chars:
1196            if skip:
1197                result = TrieResult.PREFIX
1198            else:
1199                result, trie = in_trie(trie, char.upper())
1200
1201            if result == TrieResult.FAILED:
1202                break
1203            if result == TrieResult.EXISTS:
1204                word = chars
1205
1206            end = self._current + size
1207            size += 1
1208
1209            if end < self.size:
1210                char = self.sql[end]
1211                single_token = single_token or char in self.SINGLE_TOKENS
1212                is_space = char.isspace()
1213
1214                if not is_space or not prev_space:
1215                    if is_space:
1216                        char = " "
1217                    chars += char
1218                    prev_space = is_space
1219                    skip = False
1220                else:
1221                    skip = True
1222            else:
1223                char = ""
1224                break
1225
1226        if word:
1227            if self._scan_string(word):
1228                return
1229            if self._scan_comment(word):
1230                return
1231            if prev_space or single_token or not char:
1232                self._advance(size - 1)
1233                word = word.upper()
1234                self._add(self.KEYWORDS[word], text=word)
1235                return
1236
1237        if self._char in self.SINGLE_TOKENS:
1238            self._add(self.SINGLE_TOKENS[self._char], text=self._char)
1239            return
1240
1241        self._scan_var()
1242
1243    def _scan_comment(self, comment_start: str) -> bool:
1244        if comment_start not in self._COMMENTS:
1245            return False
1246
1247        comment_start_line = self._line
1248        comment_start_size = len(comment_start)
1249        comment_end = self._COMMENTS[comment_start]
1250
1251        if comment_end:
1252            # Skip the comment's start delimiter
1253            self._advance(comment_start_size)
1254
1255            comment_count = 1
1256            comment_end_size = len(comment_end)
1257
1258            while not self._end:
1259                if self._chars(comment_end_size) == comment_end:
1260                    comment_count -= 1
1261                    if not comment_count:
1262                        break
1263
1264                self._advance(alnum=True)
1265
1266                # Nested comments are allowed by some dialects, e.g. databricks, duckdb, postgres
1267                if (
1268                    self.NESTED_COMMENTS
1269                    and not self._end
1270                    and self._chars(comment_end_size) == comment_start
1271                ):
1272                    self._advance(comment_start_size)
1273                    comment_count += 1
1274
1275            self._comments.append(self._text[comment_start_size : -comment_end_size + 1])
1276            self._advance(comment_end_size - 1)
1277        else:
1278            while not self._end and self.WHITE_SPACE.get(self._peek) is not TokenType.BREAK:
1279                self._advance(alnum=True)
1280            self._comments.append(self._text[comment_start_size:])
1281
1282        if (
1283            comment_start == self.HINT_START
1284            and self.tokens
1285            and self.tokens[-1].token_type in self.TOKENS_PRECEDING_HINT
1286        ):
1287            self._add(TokenType.HINT)
1288
1289        # Leading comment is attached to the succeeding token, whilst trailing comment to the preceding.
1290        # Multiple consecutive comments are preserved by appending them to the current comments list.
1291        if comment_start_line == self._prev_token_line:
1292            self.tokens[-1].comments.extend(self._comments)
1293            self._comments = []
1294            self._prev_token_line = self._line
1295
1296        return True
1297
1298    def _scan_number(self) -> None:
1299        if self._char == "0":
1300            peek = self._peek.upper()
1301            if peek == "B":
1302                return self._scan_bits() if self.BIT_STRINGS else self._add(TokenType.NUMBER)
1303            elif peek == "X":
1304                return self._scan_hex() if self.HEX_STRINGS else self._add(TokenType.NUMBER)
1305
1306        decimal = False
1307        scientific = 0
1308
1309        while True:
1310            if self._peek.isdigit():
1311                self._advance()
1312            elif self._peek == "." and not decimal:
1313                if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER:
1314                    return self._add(TokenType.NUMBER)
1315                decimal = True
1316                self._advance()
1317            elif self._peek in ("-", "+") and scientific == 1:
1318                scientific += 1
1319                self._advance()
1320            elif self._peek.upper() == "E" and not scientific:
1321                scientific += 1
1322                self._advance()
1323            elif self._peek.isidentifier():
1324                number_text = self._text
1325                literal = ""
1326
1327                while self._peek.strip() and self._peek not in self.SINGLE_TOKENS:
1328                    literal += self._peek
1329                    self._advance()
1330
1331                token_type = self.KEYWORDS.get(self.NUMERIC_LITERALS.get(literal.upper(), ""))
1332
1333                if token_type:
1334                    self._add(TokenType.NUMBER, number_text)
1335                    self._add(TokenType.DCOLON, "::")
1336                    return self._add(token_type, literal)
1337                else:
1338                    replaced = literal.replace("_", "")
1339                    if self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED and replaced.isdigit():
1340                        return self._add(TokenType.NUMBER, number_text + replaced)
1341                    if self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT:
1342                        return self._add(TokenType.VAR)
1343
1344                self._advance(-len(literal))
1345                return self._add(TokenType.NUMBER, number_text)
1346            else:
1347                return self._add(TokenType.NUMBER)
1348
1349    def _scan_bits(self) -> None:
1350        self._advance()
1351        value = self._extract_value()
1352        try:
1353            # If `value` can't be converted to a binary, fallback to tokenizing it as an identifier
1354            int(value, 2)
1355            self._add(TokenType.BIT_STRING, value[2:])  # Drop the 0b
1356        except ValueError:
1357            self._add(TokenType.IDENTIFIER)
1358
1359    def _scan_hex(self) -> None:
1360        self._advance()
1361        value = self._extract_value()
1362        try:
1363            # If `value` can't be converted to a hex, fallback to tokenizing it as an identifier
1364            int(value, 16)
1365            self._add(TokenType.HEX_STRING, value[2:])  # Drop the 0x
1366        except ValueError:
1367            self._add(TokenType.IDENTIFIER)
1368
1369    def _extract_value(self) -> str:
1370        while True:
1371            char = self._peek.strip()
1372            if char and char not in self.SINGLE_TOKENS:
1373                self._advance(alnum=True)
1374            else:
1375                break
1376
1377        return self._text
1378
1379    def _scan_string(self, start: str) -> bool:
1380        base = None
1381        token_type = TokenType.STRING
1382
1383        if start in self._QUOTES:
1384            end = self._QUOTES[start]
1385        elif start in self._FORMAT_STRINGS:
1386            end, token_type = self._FORMAT_STRINGS[start]
1387
1388            if token_type == TokenType.HEX_STRING:
1389                base = 16
1390            elif token_type == TokenType.BIT_STRING:
1391                base = 2
1392            elif token_type == TokenType.HEREDOC_STRING:
1393                self._advance()
1394
1395                if self._char == end:
1396                    tag = ""
1397                else:
1398                    tag = self._extract_string(
1399                        end,
1400                        raw_string=True,
1401                        raise_unmatched=not self.HEREDOC_TAG_IS_IDENTIFIER,
1402                    )
1403
1404                if tag and self.HEREDOC_TAG_IS_IDENTIFIER and (self._end or not tag.isidentifier()):
1405                    if not self._end:
1406                        self._advance(-1)
1407
1408                    self._advance(-len(tag))
1409                    self._add(self.HEREDOC_STRING_ALTERNATIVE)
1410                    return True
1411
1412                end = f"{start}{tag}{end}"
1413        else:
1414            return False
1415
1416        self._advance(len(start))
1417        text = self._extract_string(end, raw_string=token_type == TokenType.RAW_STRING)
1418
1419        if base:
1420            try:
1421                int(text, base)
1422            except Exception:
1423                raise TokenError(
1424                    f"Numeric string contains invalid characters from {self._line}:{self._start}"
1425                )
1426
1427        self._add(token_type, text)
1428        return True
1429
1430    def _scan_identifier(self, identifier_end: str) -> None:
1431        self._advance()
1432        text = self._extract_string(
1433            identifier_end, escapes=self._IDENTIFIER_ESCAPES | {identifier_end}
1434        )
1435        self._add(TokenType.IDENTIFIER, text)
1436
1437    def _scan_var(self) -> None:
1438        while True:
1439            char = self._peek.strip()
1440            if char and (char in self.VAR_SINGLE_TOKENS or char not in self.SINGLE_TOKENS):
1441                self._advance(alnum=True)
1442            else:
1443                break
1444
1445        self._add(
1446            TokenType.VAR
1447            if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER
1448            else self.KEYWORDS.get(self._text.upper(), TokenType.VAR)
1449        )
1450
1451    def _extract_string(
1452        self,
1453        delimiter: str,
1454        escapes: t.Optional[t.Set[str]] = None,
1455        raw_string: bool = False,
1456        raise_unmatched: bool = True,
1457    ) -> str:
1458        text = ""
1459        delim_size = len(delimiter)
1460        escapes = self._STRING_ESCAPES if escapes is None else escapes
1461
1462        while True:
1463            if (
1464                not raw_string
1465                and self.dialect.UNESCAPED_SEQUENCES
1466                and self._peek
1467                and self._char in self.STRING_ESCAPES
1468            ):
1469                unescaped_sequence = self.dialect.UNESCAPED_SEQUENCES.get(self._char + self._peek)
1470                if unescaped_sequence:
1471                    self._advance(2)
1472                    text += unescaped_sequence
1473                    continue
1474            if (
1475                (self.STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS or not raw_string)
1476                and self._char in escapes
1477                and (self._peek == delimiter or self._peek in escapes)
1478                and (self._char not in self._QUOTES or self._char == self._peek)
1479            ):
1480                if self._peek == delimiter:
1481                    text += self._peek
1482                else:
1483                    text += self._char + self._peek
1484
1485                if self._current + 1 < self.size:
1486                    self._advance(2)
1487                else:
1488                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._current}")
1489            else:
1490                if self._chars(delim_size) == delimiter:
1491                    if delim_size > 1:
1492                        self._advance(delim_size - 1)
1493                    break
1494
1495                if self._end:
1496                    if not raise_unmatched:
1497                        return text + self._char
1498
1499                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._start}")
1500
1501                current = self._current - 1
1502                self._advance(alnum=True)
1503                text += self.sql[current : self._current - 1]
1504
1505        return text
1506
1507    def tokenize_rs(self, sql: str) -> t.List[Token]:
1508        if not self._RS_TOKENIZER:
1509            raise SqlglotError("Rust tokenizer is not available")
1510
1511        tokens, error_msg = self._RS_TOKENIZER.tokenize(sql, self._rs_dialect_settings)
1512        for token in tokens:
1513            token.token_type = _ALL_TOKEN_TYPES[token.token_type_index]
1514
1515        # Setting this here so partial token lists can be inspected even if there is a failure
1516        self.tokens = tokens
1517
1518        if error_msg is not None:
1519            raise TokenError(error_msg)
1520
1521        return tokens
Tokenizer( dialect: Union[str, sqlglot.dialects.Dialect, Type[sqlglot.dialects.Dialect], NoneType] = None, use_rs_tokenizer: Optional[bool] = None)
1017    def __init__(
1018        self, dialect: DialectType = None, use_rs_tokenizer: t.Optional[bool] = None
1019    ) -> None:
1020        from sqlglot.dialects import Dialect
1021
1022        self.dialect = Dialect.get_or_raise(dialect)
1023
1024        # initialize `use_rs_tokenizer`, and allow it to be overwritten per Tokenizer instance
1025        self.use_rs_tokenizer = (
1026            use_rs_tokenizer if use_rs_tokenizer is not None else USE_RS_TOKENIZER
1027        )
1028
1029        if self.use_rs_tokenizer:
1030            self._rs_dialect_settings = RsTokenizerDialectSettings(
1031                unescaped_sequences=self.dialect.UNESCAPED_SEQUENCES,
1032                identifiers_can_start_with_digit=self.dialect.IDENTIFIERS_CAN_START_WITH_DIGIT,
1033                numbers_can_be_underscore_separated=self.dialect.NUMBERS_CAN_BE_UNDERSCORE_SEPARATED,
1034            )
1035
1036        self.reset()
SINGLE_TOKENS = {'(': <TokenType.L_PAREN: 'L_PAREN'>, ')': <TokenType.R_PAREN: 'R_PAREN'>, '[': <TokenType.L_BRACKET: 'L_BRACKET'>, ']': <TokenType.R_BRACKET: 'R_BRACKET'>, '{': <TokenType.L_BRACE: 'L_BRACE'>, '}': <TokenType.R_BRACE: 'R_BRACE'>, '&': <TokenType.AMP: 'AMP'>, '^': <TokenType.CARET: 'CARET'>, ':': <TokenType.COLON: 'COLON'>, ',': <TokenType.COMMA: 'COMMA'>, '.': <TokenType.DOT: 'DOT'>, '-': <TokenType.DASH: 'DASH'>, '=': <TokenType.EQ: 'EQ'>, '>': <TokenType.GT: 'GT'>, '<': <TokenType.LT: 'LT'>, '%': <TokenType.MOD: 'MOD'>, '!': <TokenType.NOT: 'NOT'>, '|': <TokenType.PIPE: 'PIPE'>, '+': <TokenType.PLUS: 'PLUS'>, ';': <TokenType.SEMICOLON: 'SEMICOLON'>, '/': <TokenType.SLASH: 'SLASH'>, '\\': <TokenType.BACKSLASH: 'BACKSLASH'>, '*': <TokenType.STAR: 'STAR'>, '~': <TokenType.TILDA: 'TILDA'>, '?': <TokenType.PLACEHOLDER: 'PLACEHOLDER'>, '@': <TokenType.PARAMETER: 'PARAMETER'>, '#': <TokenType.HASH: 'HASH'>, "'": <TokenType.UNKNOWN: 'UNKNOWN'>, '`': <TokenType.UNKNOWN: 'UNKNOWN'>, '"': <TokenType.UNKNOWN: 'UNKNOWN'>}
BIT_STRINGS: List[Union[str, Tuple[str, str]]] = []
BYTE_STRINGS: List[Union[str, Tuple[str, str]]] = []
HEX_STRINGS: List[Union[str, Tuple[str, str]]] = []
RAW_STRINGS: List[Union[str, Tuple[str, str]]] = []
HEREDOC_STRINGS: List[Union[str, Tuple[str, str]]] = []
UNICODE_STRINGS: List[Union[str, Tuple[str, str]]] = []
IDENTIFIERS: List[Union[str, Tuple[str, str]]] = ['"']
QUOTES: List[Union[str, Tuple[str, str]]] = ["'"]
STRING_ESCAPES = ["'"]
VAR_SINGLE_TOKENS: Set[str] = set()
IDENTIFIER_ESCAPES: List[str] = []
HEREDOC_TAG_IS_IDENTIFIER = False
HEREDOC_STRING_ALTERNATIVE = <TokenType.VAR: 'VAR'>
STRING_ESCAPES_ALLOWED_IN_RAW_STRINGS = True
NESTED_COMMENTS = True
HINT_START = '/*+'
TOKENS_PRECEDING_HINT = {<TokenType.SELECT: 'SELECT'>, <TokenType.INSERT: 'INSERT'>, <TokenType.UPDATE: 'UPDATE'>, <TokenType.DELETE: 'DELETE'>}
KEYWORDS: Dict[str, TokenType] = {'{%': <TokenType.BLOCK_START: 'BLOCK_START'>, '{%+': <TokenType.BLOCK_START: 'BLOCK_START'>, '{%-': <TokenType.BLOCK_START: 'BLOCK_START'>, '%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '+%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '-%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '{{+': <TokenType.BLOCK_START: 'BLOCK_START'>, '{{-': <TokenType.BLOCK_START: 'BLOCK_START'>, '+}}': <TokenType.BLOCK_END: 'BLOCK_END'>, '-}}': <TokenType.BLOCK_END: 'BLOCK_END'>, '/*+': <TokenType.HINT: 'HINT'>, '==': <TokenType.EQ: 'EQ'>, '::': <TokenType.DCOLON: 'DCOLON'>, '||': <TokenType.DPIPE: 'DPIPE'>, '|>': <TokenType.PIPE_GT: 'PIPE_GT'>, '>=': <TokenType.GTE: 'GTE'>, '<=': <TokenType.LTE: 'LTE'>, '<>': <TokenType.NEQ: 'NEQ'>, '!=': <TokenType.NEQ: 'NEQ'>, ':=': <TokenType.COLON_EQ: 'COLON_EQ'>, '<=>': <TokenType.NULLSAFE_EQ: 'NULLSAFE_EQ'>, '->': <TokenType.ARROW: 'ARROW'>, '->>': <TokenType.DARROW: 'DARROW'>, '=>': <TokenType.FARROW: 'FARROW'>, '#>': <TokenType.HASH_ARROW: 'HASH_ARROW'>, '#>>': <TokenType.DHASH_ARROW: 'DHASH_ARROW'>, '<->': <TokenType.LR_ARROW: 'LR_ARROW'>, '&&': <TokenType.DAMP: 'DAMP'>, '??': <TokenType.DQMARK: 'DQMARK'>, '~~~': <TokenType.GLOB: 'GLOB'>, '~~': <TokenType.LIKE: 'LIKE'>, '~~*': <TokenType.ILIKE: 'ILIKE'>, '~*': <TokenType.IRLIKE: 'IRLIKE'>, 'ALL': <TokenType.ALL: 'ALL'>, 'ALWAYS': <TokenType.ALWAYS: 'ALWAYS'>, 'AND': <TokenType.AND: 'AND'>, 'ANTI': <TokenType.ANTI: 'ANTI'>, 'ANY': <TokenType.ANY: 'ANY'>, 'ASC': <TokenType.ASC: 'ASC'>, 'AS': <TokenType.ALIAS: 'ALIAS'>, 'ASOF': <TokenType.ASOF: 'ASOF'>, 'AUTOINCREMENT': <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>, 'AUTO_INCREMENT': <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>, 'BEGIN': <TokenType.BEGIN: 'BEGIN'>, 'BETWEEN': <TokenType.BETWEEN: 'BETWEEN'>, 'CACHE': <TokenType.CACHE: 'CACHE'>, 'UNCACHE': <TokenType.UNCACHE: 'UNCACHE'>, 'CASE': <TokenType.CASE: 'CASE'>, 'CHARACTER SET': <TokenType.CHARACTER_SET: 'CHARACTER_SET'>, 'CLUSTER BY': <TokenType.CLUSTER_BY: 'CLUSTER_BY'>, 'COLLATE': <TokenType.COLLATE: 'COLLATE'>, 'COLUMN': <TokenType.COLUMN: 'COLUMN'>, 'COMMIT': <TokenType.COMMIT: 'COMMIT'>, 'CONNECT BY': <TokenType.CONNECT_BY: 'CONNECT_BY'>, 'CONSTRAINT': <TokenType.CONSTRAINT: 'CONSTRAINT'>, 'COPY': <TokenType.COPY: 'COPY'>, 'CREATE': <TokenType.CREATE: 'CREATE'>, 'CROSS': <TokenType.CROSS: 'CROSS'>, 'CUBE': <TokenType.CUBE: 'CUBE'>, 'CURRENT_DATE': <TokenType.CURRENT_DATE: 'CURRENT_DATE'>, 'CURRENT_SCHEMA': <TokenType.CURRENT_SCHEMA: 'CURRENT_SCHEMA'>, 'CURRENT_TIME': <TokenType.CURRENT_TIME: 'CURRENT_TIME'>, 'CURRENT_TIMESTAMP': <TokenType.CURRENT_TIMESTAMP: 'CURRENT_TIMESTAMP'>, 'CURRENT_USER': <TokenType.CURRENT_USER: 'CURRENT_USER'>, 'DATABASE': <TokenType.DATABASE: 'DATABASE'>, 'DEFAULT': <TokenType.DEFAULT: 'DEFAULT'>, 'DELETE': <TokenType.DELETE: 'DELETE'>, 'DESC': <TokenType.DESC: 'DESC'>, 'DESCRIBE': <TokenType.DESCRIBE: 'DESCRIBE'>, 'DISTINCT': <TokenType.DISTINCT: 'DISTINCT'>, 'DISTRIBUTE BY': <TokenType.DISTRIBUTE_BY: 'DISTRIBUTE_BY'>, 'DIV': <TokenType.DIV: 'DIV'>, 'DROP': <TokenType.DROP: 'DROP'>, 'ELSE': <TokenType.ELSE: 'ELSE'>, 'END': <TokenType.END: 'END'>, 'ENUM': <TokenType.ENUM: 'ENUM'>, 'ESCAPE': <TokenType.ESCAPE: 'ESCAPE'>, 'EXCEPT': <TokenType.EXCEPT: 'EXCEPT'>, 'EXECUTE': <TokenType.EXECUTE: 'EXECUTE'>, 'EXISTS': <TokenType.EXISTS: 'EXISTS'>, 'FALSE': <TokenType.FALSE: 'FALSE'>, 'FETCH': <TokenType.FETCH: 'FETCH'>, 'FILTER': <TokenType.FILTER: 'FILTER'>, 'FIRST': <TokenType.FIRST: 'FIRST'>, 'FULL': <TokenType.FULL: 'FULL'>, 'FUNCTION': <TokenType.FUNCTION: 'FUNCTION'>, 'FOR': <TokenType.FOR: 'FOR'>, 'FOREIGN KEY': <TokenType.FOREIGN_KEY: 'FOREIGN_KEY'>, 'FORMAT': <TokenType.FORMAT: 'FORMAT'>, 'FROM': <TokenType.FROM: 'FROM'>, 'GEOGRAPHY': <TokenType.GEOGRAPHY: 'GEOGRAPHY'>, 'GEOMETRY': <TokenType.GEOMETRY: 'GEOMETRY'>, 'GLOB': <TokenType.GLOB: 'GLOB'>, 'GROUP BY': <TokenType.GROUP_BY: 'GROUP_BY'>, 'GROUPING SETS': <TokenType.GROUPING_SETS: 'GROUPING_SETS'>, 'HAVING': <TokenType.HAVING: 'HAVING'>, 'ILIKE': <TokenType.ILIKE: 'ILIKE'>, 'IN': <TokenType.IN: 'IN'>, 'INDEX': <TokenType.INDEX: 'INDEX'>, 'INET': <TokenType.INET: 'INET'>, 'INNER': <TokenType.INNER: 'INNER'>, 'INSERT': <TokenType.INSERT: 'INSERT'>, 'INTERVAL': <TokenType.INTERVAL: 'INTERVAL'>, 'INTERSECT': <TokenType.INTERSECT: 'INTERSECT'>, 'INTO': <TokenType.INTO: 'INTO'>, 'IS': <TokenType.IS: 'IS'>, 'ISNULL': <TokenType.ISNULL: 'ISNULL'>, 'JOIN': <TokenType.JOIN: 'JOIN'>, 'KEEP': <TokenType.KEEP: 'KEEP'>, 'KILL': <TokenType.KILL: 'KILL'>, 'LATERAL': <TokenType.LATERAL: 'LATERAL'>, 'LEFT': <TokenType.LEFT: 'LEFT'>, 'LIKE': <TokenType.LIKE: 'LIKE'>, 'LIMIT': <TokenType.LIMIT: 'LIMIT'>, 'LOAD': <TokenType.LOAD: 'LOAD'>, 'LOCK': <TokenType.LOCK: 'LOCK'>, 'MERGE': <TokenType.MERGE: 'MERGE'>, 'NAMESPACE': <TokenType.NAMESPACE: 'NAMESPACE'>, 'NATURAL': <TokenType.NATURAL: 'NATURAL'>, 'NEXT': <TokenType.NEXT: 'NEXT'>, 'NOT': <TokenType.NOT: 'NOT'>, 'NOTNULL': <TokenType.NOTNULL: 'NOTNULL'>, 'NULL': <TokenType.NULL: 'NULL'>, 'OBJECT': <TokenType.OBJECT: 'OBJECT'>, 'OFFSET': <TokenType.OFFSET: 'OFFSET'>, 'ON': <TokenType.ON: 'ON'>, 'OR': <TokenType.OR: 'OR'>, 'XOR': <TokenType.XOR: 'XOR'>, 'ORDER BY': <TokenType.ORDER_BY: 'ORDER_BY'>, 'ORDINALITY': <TokenType.ORDINALITY: 'ORDINALITY'>, 'OUTER': <TokenType.OUTER: 'OUTER'>, 'OVER': <TokenType.OVER: 'OVER'>, 'OVERLAPS': <TokenType.OVERLAPS: 'OVERLAPS'>, 'OVERWRITE': <TokenType.OVERWRITE: 'OVERWRITE'>, 'PARTITION': <TokenType.PARTITION: 'PARTITION'>, 'PARTITION BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PARTITIONED BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PARTITIONED_BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PERCENT': <TokenType.PERCENT: 'PERCENT'>, 'PIVOT': <TokenType.PIVOT: 'PIVOT'>, 'PRAGMA': <TokenType.PRAGMA: 'PRAGMA'>, 'PRIMARY KEY': <TokenType.PRIMARY_KEY: 'PRIMARY_KEY'>, 'PROCEDURE': <TokenType.PROCEDURE: 'PROCEDURE'>, 'QUALIFY': <TokenType.QUALIFY: 'QUALIFY'>, 'RANGE': <TokenType.RANGE: 'RANGE'>, 'RECURSIVE': <TokenType.RECURSIVE: 'RECURSIVE'>, 'REGEXP': <TokenType.RLIKE: 'RLIKE'>, 'RENAME': <TokenType.RENAME: 'RENAME'>, 'REPLACE': <TokenType.REPLACE: 'REPLACE'>, 'RETURNING': <TokenType.RETURNING: 'RETURNING'>, 'REFERENCES': <TokenType.REFERENCES: 'REFERENCES'>, 'RIGHT': <TokenType.RIGHT: 'RIGHT'>, 'RLIKE': <TokenType.RLIKE: 'RLIKE'>, 'ROLLBACK': <TokenType.ROLLBACK: 'ROLLBACK'>, 'ROLLUP': <TokenType.ROLLUP: 'ROLLUP'>, 'ROW': <TokenType.ROW: 'ROW'>, 'ROWS': <TokenType.ROWS: 'ROWS'>, 'SCHEMA': <TokenType.SCHEMA: 'SCHEMA'>, 'SELECT': <TokenType.SELECT: 'SELECT'>, 'SEMI': <TokenType.SEMI: 'SEMI'>, 'SET': <TokenType.SET: 'SET'>, 'SETTINGS': <TokenType.SETTINGS: 'SETTINGS'>, 'SHOW': <TokenType.SHOW: 'SHOW'>, 'SIMILAR TO': <TokenType.SIMILAR_TO: 'SIMILAR_TO'>, 'SOME': <TokenType.SOME: 'SOME'>, 'SORT BY': <TokenType.SORT_BY: 'SORT_BY'>, 'START WITH': <TokenType.START_WITH: 'START_WITH'>, 'STRAIGHT_JOIN': <TokenType.STRAIGHT_JOIN: 'STRAIGHT_JOIN'>, 'TABLE': <TokenType.TABLE: 'TABLE'>, 'TABLESAMPLE': <TokenType.TABLE_SAMPLE: 'TABLE_SAMPLE'>, 'TEMP': <TokenType.TEMPORARY: 'TEMPORARY'>, 'TEMPORARY': <TokenType.TEMPORARY: 'TEMPORARY'>, 'THEN': <TokenType.THEN: 'THEN'>, 'TRUE': <TokenType.TRUE: 'TRUE'>, 'TRUNCATE': <TokenType.TRUNCATE: 'TRUNCATE'>, 'UNION': <TokenType.UNION: 'UNION'>, 'UNKNOWN': <TokenType.UNKNOWN: 'UNKNOWN'>, 'UNNEST': <TokenType.UNNEST: 'UNNEST'>, 'UNPIVOT': <TokenType.UNPIVOT: 'UNPIVOT'>, 'UPDATE': <TokenType.UPDATE: 'UPDATE'>, 'USE': <TokenType.USE: 'USE'>, 'USING': <TokenType.USING: 'USING'>, 'UUID': <TokenType.UUID: 'UUID'>, 'VALUES': <TokenType.VALUES: 'VALUES'>, 'VIEW': <TokenType.VIEW: 'VIEW'>, 'VOLATILE': <TokenType.VOLATILE: 'VOLATILE'>, 'WHEN': <TokenType.WHEN: 'WHEN'>, 'WHERE': <TokenType.WHERE: 'WHERE'>, 'WINDOW': <TokenType.WINDOW: 'WINDOW'>, 'WITH': <TokenType.WITH: 'WITH'>, 'APPLY': <TokenType.APPLY: 'APPLY'>, 'ARRAY': <TokenType.ARRAY: 'ARRAY'>, 'BIT': <TokenType.BIT: 'BIT'>, 'BOOL': <TokenType.BOOLEAN: 'BOOLEAN'>, 'BOOLEAN': <TokenType.BOOLEAN: 'BOOLEAN'>, 'BYTE': <TokenType.TINYINT: 'TINYINT'>, 'MEDIUMINT': <TokenType.MEDIUMINT: 'MEDIUMINT'>, 'INT1': <TokenType.TINYINT: 'TINYINT'>, 'TINYINT': <TokenType.TINYINT: 'TINYINT'>, 'INT16': <TokenType.SMALLINT: 'SMALLINT'>, 'SHORT': <TokenType.SMALLINT: 'SMALLINT'>, 'SMALLINT': <TokenType.SMALLINT: 'SMALLINT'>, 'HUGEINT': <TokenType.INT128: 'INT128'>, 'UHUGEINT': <TokenType.UINT128: 'UINT128'>, 'INT2': <TokenType.SMALLINT: 'SMALLINT'>, 'INTEGER': <TokenType.INT: 'INT'>, 'INT': <TokenType.INT: 'INT'>, 'INT4': <TokenType.INT: 'INT'>, 'INT32': <TokenType.INT: 'INT'>, 'INT64': <TokenType.BIGINT: 'BIGINT'>, 'INT128': <TokenType.INT128: 'INT128'>, 'INT256': <TokenType.INT256: 'INT256'>, 'LONG': <TokenType.BIGINT: 'BIGINT'>, 'BIGINT': <TokenType.BIGINT: 'BIGINT'>, 'INT8': <TokenType.TINYINT: 'TINYINT'>, 'UINT': <TokenType.UINT: 'UINT'>, 'UINT128': <TokenType.UINT128: 'UINT128'>, 'UINT256': <TokenType.UINT256: 'UINT256'>, 'DEC': <TokenType.DECIMAL: 'DECIMAL'>, 'DECIMAL': <TokenType.DECIMAL: 'DECIMAL'>, 'DECIMAL32': <TokenType.DECIMAL32: 'DECIMAL32'>, 'DECIMAL64': <TokenType.DECIMAL64: 'DECIMAL64'>, 'DECIMAL128': <TokenType.DECIMAL128: 'DECIMAL128'>, 'DECIMAL256': <TokenType.DECIMAL256: 'DECIMAL256'>, 'BIGDECIMAL': <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, 'BIGNUMERIC': <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, 'LIST': <TokenType.LIST: 'LIST'>, 'MAP': <TokenType.MAP: 'MAP'>, 'NULLABLE': <TokenType.NULLABLE: 'NULLABLE'>, 'NUMBER': <TokenType.DECIMAL: 'DECIMAL'>, 'NUMERIC': <TokenType.DECIMAL: 'DECIMAL'>, 'FIXED': <TokenType.DECIMAL: 'DECIMAL'>, 'REAL': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT4': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT8': <TokenType.DOUBLE: 'DOUBLE'>, 'DOUBLE': <TokenType.DOUBLE: 'DOUBLE'>, 'DOUBLE PRECISION': <TokenType.DOUBLE: 'DOUBLE'>, 'JSON': <TokenType.JSON: 'JSON'>, 'JSONB': <TokenType.JSONB: 'JSONB'>, 'CHAR': <TokenType.CHAR: 'CHAR'>, 'CHARACTER': <TokenType.CHAR: 'CHAR'>, 'CHAR VARYING': <TokenType.VARCHAR: 'VARCHAR'>, 'CHARACTER VARYING': <TokenType.VARCHAR: 'VARCHAR'>, 'NCHAR': <TokenType.NCHAR: 'NCHAR'>, 'VARCHAR': <TokenType.VARCHAR: 'VARCHAR'>, 'VARCHAR2': <TokenType.VARCHAR: 'VARCHAR'>, 'NVARCHAR': <TokenType.NVARCHAR: 'NVARCHAR'>, 'NVARCHAR2': <TokenType.NVARCHAR: 'NVARCHAR'>, 'BPCHAR': <TokenType.BPCHAR: 'BPCHAR'>, 'STR': <TokenType.TEXT: 'TEXT'>, 'STRING': <TokenType.TEXT: 'TEXT'>, 'TEXT': <TokenType.TEXT: 'TEXT'>, 'LONGTEXT': <TokenType.LONGTEXT: 'LONGTEXT'>, 'MEDIUMTEXT': <TokenType.MEDIUMTEXT: 'MEDIUMTEXT'>, 'TINYTEXT': <TokenType.TINYTEXT: 'TINYTEXT'>, 'CLOB': <TokenType.TEXT: 'TEXT'>, 'LONGVARCHAR': <TokenType.TEXT: 'TEXT'>, 'BINARY': <TokenType.BINARY: 'BINARY'>, 'BLOB': <TokenType.VARBINARY: 'VARBINARY'>, 'LONGBLOB': <TokenType.LONGBLOB: 'LONGBLOB'>, 'MEDIUMBLOB': <TokenType.MEDIUMBLOB: 'MEDIUMBLOB'>, 'TINYBLOB': <TokenType.TINYBLOB: 'TINYBLOB'>, 'BYTEA': <TokenType.VARBINARY: 'VARBINARY'>, 'VARBINARY': <TokenType.VARBINARY: 'VARBINARY'>, 'TIME': <TokenType.TIME: 'TIME'>, 'TIMETZ': <TokenType.TIMETZ: 'TIMETZ'>, 'TIMESTAMP': <TokenType.TIMESTAMP: 'TIMESTAMP'>, 'TIMESTAMPTZ': <TokenType.TIMESTAMPTZ: 'TIMESTAMPTZ'>, 'TIMESTAMPLTZ': <TokenType.TIMESTAMPLTZ: 'TIMESTAMPLTZ'>, 'TIMESTAMP_LTZ': <TokenType.TIMESTAMPLTZ: 'TIMESTAMPLTZ'>, 'TIMESTAMPNTZ': <TokenType.TIMESTAMPNTZ: 'TIMESTAMPNTZ'>, 'TIMESTAMP_NTZ': <TokenType.TIMESTAMPNTZ: 'TIMESTAMPNTZ'>, 'DATE': <TokenType.DATE: 'DATE'>, 'DATETIME': <TokenType.DATETIME: 'DATETIME'>, 'INT4RANGE': <TokenType.INT4RANGE: 'INT4RANGE'>, 'INT4MULTIRANGE': <TokenType.INT4MULTIRANGE: 'INT4MULTIRANGE'>, 'INT8RANGE': <TokenType.INT8RANGE: 'INT8RANGE'>, 'INT8MULTIRANGE': <TokenType.INT8MULTIRANGE: 'INT8MULTIRANGE'>, 'NUMRANGE': <TokenType.NUMRANGE: 'NUMRANGE'>, 'NUMMULTIRANGE': <TokenType.NUMMULTIRANGE: 'NUMMULTIRANGE'>, 'TSRANGE': <TokenType.TSRANGE: 'TSRANGE'>, 'TSMULTIRANGE': <TokenType.TSMULTIRANGE: 'TSMULTIRANGE'>, 'TSTZRANGE': <TokenType.TSTZRANGE: 'TSTZRANGE'>, 'TSTZMULTIRANGE': <TokenType.TSTZMULTIRANGE: 'TSTZMULTIRANGE'>, 'DATERANGE': <TokenType.DATERANGE: 'DATERANGE'>, 'DATEMULTIRANGE': <TokenType.DATEMULTIRANGE: 'DATEMULTIRANGE'>, 'UNIQUE': <TokenType.UNIQUE: 'UNIQUE'>, 'VECTOR': <TokenType.VECTOR: 'VECTOR'>, 'STRUCT': <TokenType.STRUCT: 'STRUCT'>, 'SEQUENCE': <TokenType.SEQUENCE: 'SEQUENCE'>, 'VARIANT': <TokenType.VARIANT: 'VARIANT'>, 'ALTER': <TokenType.ALTER: 'ALTER'>, 'ANALYZE': <TokenType.ANALYZE: 'ANALYZE'>, 'CALL': <TokenType.COMMAND: 'COMMAND'>, 'COMMENT': <TokenType.COMMENT: 'COMMENT'>, 'EXPLAIN': <TokenType.COMMAND: 'COMMAND'>, 'GRANT': <TokenType.GRANT: 'GRANT'>, 'OPTIMIZE': <TokenType.COMMAND: 'COMMAND'>, 'PREPARE': <TokenType.COMMAND: 'COMMAND'>, 'VACUUM': <TokenType.COMMAND: 'COMMAND'>, 'USER-DEFINED': <TokenType.USERDEFINED: 'USERDEFINED'>, 'FOR VERSION': <TokenType.VERSION_SNAPSHOT: 'VERSION_SNAPSHOT'>, 'FOR TIMESTAMP': <TokenType.TIMESTAMP_SNAPSHOT: 'TIMESTAMP_SNAPSHOT'>}
WHITE_SPACE: Dict[Optional[str], TokenType] = {' ': <TokenType.SPACE: 'SPACE'>, '\t': <TokenType.SPACE: 'SPACE'>, '\n': <TokenType.BREAK: 'BREAK'>, '\r': <TokenType.BREAK: 'BREAK'>}
COMMANDS = {<TokenType.EXECUTE: 'EXECUTE'>, <TokenType.SHOW: 'SHOW'>, <TokenType.RENAME: 'RENAME'>, <TokenType.COMMAND: 'COMMAND'>, <TokenType.FETCH: 'FETCH'>}
COMMAND_PREFIX_TOKENS = {<TokenType.SEMICOLON: 'SEMICOLON'>, <TokenType.BEGIN: 'BEGIN'>}
NUMERIC_LITERALS: Dict[str, str] = {}
COMMENTS = ['--', ('/*', '*/')]
dialect
use_rs_tokenizer
def reset(self) -> None:
1038    def reset(self) -> None:
1039        self.sql = ""
1040        self.size = 0
1041        self.tokens: t.List[Token] = []
1042        self._start = 0
1043        self._current = 0
1044        self._line = 1
1045        self._col = 0
1046        self._comments: t.List[str] = []
1047
1048        self._char = ""
1049        self._end = False
1050        self._peek = ""
1051        self._prev_token_line = -1
def tokenize(self, sql: str) -> List[Token]:
1053    def tokenize(self, sql: str) -> t.List[Token]:
1054        """Returns a list of tokens corresponding to the SQL string `sql`."""
1055        if self.use_rs_tokenizer:
1056            return self.tokenize_rs(sql)
1057
1058        self.reset()
1059        self.sql = sql
1060        self.size = len(sql)
1061
1062        try:
1063            self._scan()
1064        except Exception as e:
1065            start = max(self._current - 50, 0)
1066            end = min(self._current + 50, self.size - 1)
1067            context = self.sql[start:end]
1068            raise TokenError(f"Error tokenizing '{context}'") from e
1069
1070        return self.tokens

Returns a list of tokens corresponding to the SQL string sql.

def tokenize_rs(self, sql: str) -> List[Token]:
1507    def tokenize_rs(self, sql: str) -> t.List[Token]:
1508        if not self._RS_TOKENIZER:
1509            raise SqlglotError("Rust tokenizer is not available")
1510
1511        tokens, error_msg = self._RS_TOKENIZER.tokenize(sql, self._rs_dialect_settings)
1512        for token in tokens:
1513            token.token_type = _ALL_TOKEN_TYPES[token.token_type_index]
1514
1515        # Setting this here so partial token lists can be inspected even if there is a failure
1516        self.tokens = tokens
1517
1518        if error_msg is not None:
1519            raise TokenError(error_msg)
1520
1521        return tokens
size
sql
tokens