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sqlglot.tokens

   1from __future__ import annotations
   2
   3import typing as t
   4from enum import auto
   5
   6from sqlglot.errors import TokenError
   7from sqlglot.helper import AutoName
   8from sqlglot.trie import TrieResult, in_trie, new_trie
   9
  10
  11class TokenType(AutoName):
  12    L_PAREN = auto()
  13    R_PAREN = auto()
  14    L_BRACKET = auto()
  15    R_BRACKET = auto()
  16    L_BRACE = auto()
  17    R_BRACE = auto()
  18    COMMA = auto()
  19    DOT = auto()
  20    DASH = auto()
  21    PLUS = auto()
  22    COLON = auto()
  23    DCOLON = auto()
  24    DQMARK = auto()
  25    SEMICOLON = auto()
  26    STAR = auto()
  27    BACKSLASH = auto()
  28    SLASH = auto()
  29    LT = auto()
  30    LTE = auto()
  31    GT = auto()
  32    GTE = auto()
  33    NOT = auto()
  34    EQ = auto()
  35    NEQ = auto()
  36    NULLSAFE_EQ = auto()
  37    COLON_EQ = auto()
  38    AND = auto()
  39    OR = auto()
  40    AMP = auto()
  41    DPIPE = auto()
  42    PIPE = auto()
  43    CARET = auto()
  44    TILDA = auto()
  45    ARROW = auto()
  46    DARROW = auto()
  47    FARROW = auto()
  48    HASH = auto()
  49    HASH_ARROW = auto()
  50    DHASH_ARROW = auto()
  51    LR_ARROW = auto()
  52    DAT = auto()
  53    LT_AT = auto()
  54    AT_GT = auto()
  55    DOLLAR = auto()
  56    PARAMETER = auto()
  57    SESSION_PARAMETER = auto()
  58    DAMP = auto()
  59    XOR = auto()
  60    DSTAR = auto()
  61
  62    BLOCK_START = auto()
  63    BLOCK_END = auto()
  64
  65    SPACE = auto()
  66    BREAK = auto()
  67
  68    STRING = auto()
  69    NUMBER = auto()
  70    IDENTIFIER = auto()
  71    DATABASE = auto()
  72    COLUMN = auto()
  73    COLUMN_DEF = auto()
  74    SCHEMA = auto()
  75    TABLE = auto()
  76    VAR = auto()
  77    BIT_STRING = auto()
  78    HEX_STRING = auto()
  79    BYTE_STRING = auto()
  80    NATIONAL_STRING = auto()
  81    RAW_STRING = auto()
  82    HEREDOC_STRING = auto()
  83
  84    # types
  85    BIT = auto()
  86    BOOLEAN = auto()
  87    TINYINT = auto()
  88    UTINYINT = auto()
  89    SMALLINT = auto()
  90    USMALLINT = auto()
  91    MEDIUMINT = auto()
  92    UMEDIUMINT = auto()
  93    INT = auto()
  94    UINT = auto()
  95    BIGINT = auto()
  96    UBIGINT = auto()
  97    INT128 = auto()
  98    UINT128 = auto()
  99    INT256 = auto()
 100    UINT256 = auto()
 101    FLOAT = auto()
 102    DOUBLE = auto()
 103    DECIMAL = auto()
 104    UDECIMAL = auto()
 105    BIGDECIMAL = auto()
 106    CHAR = auto()
 107    NCHAR = auto()
 108    VARCHAR = auto()
 109    NVARCHAR = auto()
 110    TEXT = auto()
 111    MEDIUMTEXT = auto()
 112    LONGTEXT = auto()
 113    MEDIUMBLOB = auto()
 114    LONGBLOB = auto()
 115    TINYBLOB = auto()
 116    TINYTEXT = auto()
 117    BINARY = auto()
 118    VARBINARY = auto()
 119    JSON = auto()
 120    JSONB = auto()
 121    TIME = auto()
 122    TIMETZ = auto()
 123    TIMESTAMP = auto()
 124    TIMESTAMPTZ = auto()
 125    TIMESTAMPLTZ = auto()
 126    TIMESTAMP_S = auto()
 127    TIMESTAMP_MS = auto()
 128    TIMESTAMP_NS = auto()
 129    DATETIME = auto()
 130    DATETIME64 = auto()
 131    DATE = auto()
 132    INT4RANGE = auto()
 133    INT4MULTIRANGE = auto()
 134    INT8RANGE = auto()
 135    INT8MULTIRANGE = auto()
 136    NUMRANGE = auto()
 137    NUMMULTIRANGE = auto()
 138    TSRANGE = auto()
 139    TSMULTIRANGE = auto()
 140    TSTZRANGE = auto()
 141    TSTZMULTIRANGE = auto()
 142    DATERANGE = auto()
 143    DATEMULTIRANGE = auto()
 144    UUID = auto()
 145    GEOGRAPHY = auto()
 146    NULLABLE = auto()
 147    GEOMETRY = auto()
 148    HLLSKETCH = auto()
 149    HSTORE = auto()
 150    SUPER = auto()
 151    SERIAL = auto()
 152    SMALLSERIAL = auto()
 153    BIGSERIAL = auto()
 154    XML = auto()
 155    YEAR = auto()
 156    UNIQUEIDENTIFIER = auto()
 157    USERDEFINED = auto()
 158    MONEY = auto()
 159    SMALLMONEY = auto()
 160    ROWVERSION = auto()
 161    IMAGE = auto()
 162    VARIANT = auto()
 163    OBJECT = auto()
 164    INET = auto()
 165    IPADDRESS = auto()
 166    IPPREFIX = auto()
 167    ENUM = auto()
 168    ENUM8 = auto()
 169    ENUM16 = auto()
 170    FIXEDSTRING = auto()
 171    LOWCARDINALITY = auto()
 172    NESTED = auto()
 173    UNKNOWN = auto()
 174
 175    # keywords
 176    ALIAS = auto()
 177    ALTER = auto()
 178    ALWAYS = auto()
 179    ALL = auto()
 180    ANTI = auto()
 181    ANY = auto()
 182    APPLY = auto()
 183    ARRAY = auto()
 184    ASC = auto()
 185    ASOF = auto()
 186    AUTO_INCREMENT = auto()
 187    BEGIN = auto()
 188    BETWEEN = auto()
 189    CACHE = auto()
 190    CASE = auto()
 191    CHARACTER_SET = auto()
 192    CLUSTER_BY = auto()
 193    COLLATE = auto()
 194    COMMAND = auto()
 195    COMMENT = auto()
 196    COMMIT = auto()
 197    CONNECT_BY = auto()
 198    CONSTRAINT = auto()
 199    CREATE = auto()
 200    CROSS = auto()
 201    CUBE = auto()
 202    CURRENT_DATE = auto()
 203    CURRENT_DATETIME = auto()
 204    CURRENT_TIME = auto()
 205    CURRENT_TIMESTAMP = auto()
 206    CURRENT_USER = auto()
 207    DEFAULT = auto()
 208    DELETE = auto()
 209    DESC = auto()
 210    DESCRIBE = auto()
 211    DICTIONARY = auto()
 212    DISTINCT = auto()
 213    DISTRIBUTE_BY = auto()
 214    DIV = auto()
 215    DROP = auto()
 216    ELSE = auto()
 217    END = auto()
 218    ESCAPE = auto()
 219    EXCEPT = auto()
 220    EXECUTE = auto()
 221    EXISTS = auto()
 222    FALSE = auto()
 223    FETCH = auto()
 224    FILTER = auto()
 225    FINAL = auto()
 226    FIRST = auto()
 227    FOR = auto()
 228    FORCE = auto()
 229    FOREIGN_KEY = auto()
 230    FORMAT = auto()
 231    FROM = auto()
 232    FULL = auto()
 233    FUNCTION = auto()
 234    GLOB = auto()
 235    GLOBAL = auto()
 236    GROUP_BY = auto()
 237    GROUPING_SETS = auto()
 238    HAVING = auto()
 239    HINT = auto()
 240    IGNORE = auto()
 241    ILIKE = auto()
 242    ILIKE_ANY = auto()
 243    IN = auto()
 244    INDEX = auto()
 245    INNER = auto()
 246    INSERT = auto()
 247    INTERSECT = auto()
 248    INTERVAL = auto()
 249    INTO = auto()
 250    INTRODUCER = auto()
 251    IRLIKE = auto()
 252    IS = auto()
 253    ISNULL = auto()
 254    JOIN = auto()
 255    JOIN_MARKER = auto()
 256    KEEP = auto()
 257    KILL = auto()
 258    LANGUAGE = auto()
 259    LATERAL = auto()
 260    LEFT = auto()
 261    LIKE = auto()
 262    LIKE_ANY = auto()
 263    LIMIT = auto()
 264    LOAD = auto()
 265    LOCK = auto()
 266    MAP = auto()
 267    MATCH_RECOGNIZE = auto()
 268    MEMBER_OF = auto()
 269    MERGE = auto()
 270    MOD = auto()
 271    MODEL = auto()
 272    NATURAL = auto()
 273    NEXT = auto()
 274    NOTNULL = auto()
 275    NULL = auto()
 276    OBJECT_IDENTIFIER = auto()
 277    OFFSET = auto()
 278    ON = auto()
 279    OPERATOR = auto()
 280    ORDER_BY = auto()
 281    ORDERED = auto()
 282    ORDINALITY = auto()
 283    OUTER = auto()
 284    OVER = auto()
 285    OVERLAPS = auto()
 286    OVERWRITE = auto()
 287    PARTITION = auto()
 288    PARTITION_BY = auto()
 289    PERCENT = auto()
 290    PIVOT = auto()
 291    PLACEHOLDER = auto()
 292    PRAGMA = auto()
 293    PRIMARY_KEY = auto()
 294    PROCEDURE = auto()
 295    PROPERTIES = auto()
 296    PSEUDO_TYPE = auto()
 297    QUALIFY = auto()
 298    QUOTE = auto()
 299    RANGE = auto()
 300    RECURSIVE = auto()
 301    REFRESH = auto()
 302    REPLACE = auto()
 303    RETURNING = auto()
 304    REFERENCES = auto()
 305    RIGHT = auto()
 306    RLIKE = auto()
 307    ROLLBACK = auto()
 308    ROLLUP = auto()
 309    ROW = auto()
 310    ROWS = auto()
 311    SELECT = auto()
 312    SEMI = auto()
 313    SEPARATOR = auto()
 314    SERDE_PROPERTIES = auto()
 315    SET = auto()
 316    SETTINGS = auto()
 317    SHOW = auto()
 318    SIMILAR_TO = auto()
 319    SOME = auto()
 320    SORT_BY = auto()
 321    START_WITH = auto()
 322    STRUCT = auto()
 323    TABLE_SAMPLE = auto()
 324    TEMPORARY = auto()
 325    TOP = auto()
 326    THEN = auto()
 327    TRUE = auto()
 328    UNCACHE = auto()
 329    UNION = auto()
 330    UNNEST = auto()
 331    UNPIVOT = auto()
 332    UPDATE = auto()
 333    USE = auto()
 334    USING = auto()
 335    VALUES = auto()
 336    VIEW = auto()
 337    VOLATILE = auto()
 338    WHEN = auto()
 339    WHERE = auto()
 340    WINDOW = auto()
 341    WITH = auto()
 342    UNIQUE = auto()
 343    VERSION_SNAPSHOT = auto()
 344    TIMESTAMP_SNAPSHOT = auto()
 345
 346
 347class Token:
 348    __slots__ = ("token_type", "text", "line", "col", "start", "end", "comments")
 349
 350    @classmethod
 351    def number(cls, number: int) -> Token:
 352        """Returns a NUMBER token with `number` as its text."""
 353        return cls(TokenType.NUMBER, str(number))
 354
 355    @classmethod
 356    def string(cls, string: str) -> Token:
 357        """Returns a STRING token with `string` as its text."""
 358        return cls(TokenType.STRING, string)
 359
 360    @classmethod
 361    def identifier(cls, identifier: str) -> Token:
 362        """Returns an IDENTIFIER token with `identifier` as its text."""
 363        return cls(TokenType.IDENTIFIER, identifier)
 364
 365    @classmethod
 366    def var(cls, var: str) -> Token:
 367        """Returns an VAR token with `var` as its text."""
 368        return cls(TokenType.VAR, var)
 369
 370    def __init__(
 371        self,
 372        token_type: TokenType,
 373        text: str,
 374        line: int = 1,
 375        col: int = 1,
 376        start: int = 0,
 377        end: int = 0,
 378        comments: t.Optional[t.List[str]] = None,
 379    ) -> None:
 380        """Token initializer.
 381
 382        Args:
 383            token_type: The TokenType Enum.
 384            text: The text of the token.
 385            line: The line that the token ends on.
 386            col: The column that the token ends on.
 387            start: The start index of the token.
 388            end: The ending index of the token.
 389            comments: The comments to attach to the token.
 390        """
 391        self.token_type = token_type
 392        self.text = text
 393        self.line = line
 394        self.col = col
 395        self.start = start
 396        self.end = end
 397        self.comments = [] if comments is None else comments
 398
 399    def __repr__(self) -> str:
 400        attributes = ", ".join(f"{k}: {getattr(self, k)}" for k in self.__slots__)
 401        return f"<Token {attributes}>"
 402
 403
 404class _Tokenizer(type):
 405    def __new__(cls, clsname, bases, attrs):
 406        klass = super().__new__(cls, clsname, bases, attrs)
 407
 408        def _convert_quotes(arr: t.List[str | t.Tuple[str, str]]) -> t.Dict[str, str]:
 409            return dict(
 410                (item, item) if isinstance(item, str) else (item[0], item[1]) for item in arr
 411            )
 412
 413        def _quotes_to_format(
 414            token_type: TokenType, arr: t.List[str | t.Tuple[str, str]]
 415        ) -> t.Dict[str, t.Tuple[str, TokenType]]:
 416            return {k: (v, token_type) for k, v in _convert_quotes(arr).items()}
 417
 418        klass._QUOTES = _convert_quotes(klass.QUOTES)
 419        klass._IDENTIFIERS = _convert_quotes(klass.IDENTIFIERS)
 420
 421        klass._FORMAT_STRINGS = {
 422            **{
 423                p + s: (e, TokenType.NATIONAL_STRING)
 424                for s, e in klass._QUOTES.items()
 425                for p in ("n", "N")
 426            },
 427            **_quotes_to_format(TokenType.BIT_STRING, klass.BIT_STRINGS),
 428            **_quotes_to_format(TokenType.BYTE_STRING, klass.BYTE_STRINGS),
 429            **_quotes_to_format(TokenType.HEX_STRING, klass.HEX_STRINGS),
 430            **_quotes_to_format(TokenType.RAW_STRING, klass.RAW_STRINGS),
 431            **_quotes_to_format(TokenType.HEREDOC_STRING, klass.HEREDOC_STRINGS),
 432        }
 433
 434        klass._STRING_ESCAPES = set(klass.STRING_ESCAPES)
 435        klass._IDENTIFIER_ESCAPES = set(klass.IDENTIFIER_ESCAPES)
 436        klass._COMMENTS = {
 437            **dict(
 438                (comment, None) if isinstance(comment, str) else (comment[0], comment[1])
 439                for comment in klass.COMMENTS
 440            ),
 441            "{#": "#}",  # Ensure Jinja comments are tokenized correctly in all dialects
 442        }
 443
 444        klass._KEYWORD_TRIE = new_trie(
 445            key.upper()
 446            for key in (
 447                *klass.KEYWORDS,
 448                *klass._COMMENTS,
 449                *klass._QUOTES,
 450                *klass._FORMAT_STRINGS,
 451            )
 452            if " " in key or any(single in key for single in klass.SINGLE_TOKENS)
 453        )
 454
 455        return klass
 456
 457
 458class Tokenizer(metaclass=_Tokenizer):
 459    SINGLE_TOKENS = {
 460        "(": TokenType.L_PAREN,
 461        ")": TokenType.R_PAREN,
 462        "[": TokenType.L_BRACKET,
 463        "]": TokenType.R_BRACKET,
 464        "{": TokenType.L_BRACE,
 465        "}": TokenType.R_BRACE,
 466        "&": TokenType.AMP,
 467        "^": TokenType.CARET,
 468        ":": TokenType.COLON,
 469        ",": TokenType.COMMA,
 470        ".": TokenType.DOT,
 471        "-": TokenType.DASH,
 472        "=": TokenType.EQ,
 473        ">": TokenType.GT,
 474        "<": TokenType.LT,
 475        "%": TokenType.MOD,
 476        "!": TokenType.NOT,
 477        "|": TokenType.PIPE,
 478        "+": TokenType.PLUS,
 479        ";": TokenType.SEMICOLON,
 480        "/": TokenType.SLASH,
 481        "\\": TokenType.BACKSLASH,
 482        "*": TokenType.STAR,
 483        "~": TokenType.TILDA,
 484        "?": TokenType.PLACEHOLDER,
 485        "@": TokenType.PARAMETER,
 486        # used for breaking a var like x'y' but nothing else
 487        # the token type doesn't matter
 488        "'": TokenType.QUOTE,
 489        "`": TokenType.IDENTIFIER,
 490        '"': TokenType.IDENTIFIER,
 491        "#": TokenType.HASH,
 492    }
 493
 494    BIT_STRINGS: t.List[str | t.Tuple[str, str]] = []
 495    BYTE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 496    HEX_STRINGS: t.List[str | t.Tuple[str, str]] = []
 497    RAW_STRINGS: t.List[str | t.Tuple[str, str]] = []
 498    HEREDOC_STRINGS: t.List[str | t.Tuple[str, str]] = []
 499    IDENTIFIERS: t.List[str | t.Tuple[str, str]] = ['"']
 500    IDENTIFIER_ESCAPES = ['"']
 501    QUOTES: t.List[t.Tuple[str, str] | str] = ["'"]
 502    STRING_ESCAPES = ["'"]
 503    VAR_SINGLE_TOKENS: t.Set[str] = set()
 504    ESCAPE_SEQUENCES: t.Dict[str, str] = {}
 505
 506    # Autofilled
 507    IDENTIFIERS_CAN_START_WITH_DIGIT: bool = False
 508
 509    _COMMENTS: t.Dict[str, str] = {}
 510    _FORMAT_STRINGS: t.Dict[str, t.Tuple[str, TokenType]] = {}
 511    _IDENTIFIERS: t.Dict[str, str] = {}
 512    _IDENTIFIER_ESCAPES: t.Set[str] = set()
 513    _QUOTES: t.Dict[str, str] = {}
 514    _STRING_ESCAPES: t.Set[str] = set()
 515    _KEYWORD_TRIE: t.Dict = {}
 516
 517    KEYWORDS: t.Dict[str, TokenType] = {
 518        **{f"{{%{postfix}": TokenType.BLOCK_START for postfix in ("", "+", "-")},
 519        **{f"{prefix}%}}": TokenType.BLOCK_END for prefix in ("", "+", "-")},
 520        **{f"{{{{{postfix}": TokenType.BLOCK_START for postfix in ("+", "-")},
 521        **{f"{prefix}}}}}": TokenType.BLOCK_END for prefix in ("+", "-")},
 522        "/*+": TokenType.HINT,
 523        "==": TokenType.EQ,
 524        "::": TokenType.DCOLON,
 525        "||": TokenType.DPIPE,
 526        ">=": TokenType.GTE,
 527        "<=": TokenType.LTE,
 528        "<>": TokenType.NEQ,
 529        "!=": TokenType.NEQ,
 530        ":=": TokenType.COLON_EQ,
 531        "<=>": TokenType.NULLSAFE_EQ,
 532        "->": TokenType.ARROW,
 533        "->>": TokenType.DARROW,
 534        "=>": TokenType.FARROW,
 535        "#>": TokenType.HASH_ARROW,
 536        "#>>": TokenType.DHASH_ARROW,
 537        "<->": TokenType.LR_ARROW,
 538        "&&": TokenType.DAMP,
 539        "??": TokenType.DQMARK,
 540        "ALL": TokenType.ALL,
 541        "ALWAYS": TokenType.ALWAYS,
 542        "AND": TokenType.AND,
 543        "ANTI": TokenType.ANTI,
 544        "ANY": TokenType.ANY,
 545        "ASC": TokenType.ASC,
 546        "AS": TokenType.ALIAS,
 547        "ASOF": TokenType.ASOF,
 548        "AUTOINCREMENT": TokenType.AUTO_INCREMENT,
 549        "AUTO_INCREMENT": TokenType.AUTO_INCREMENT,
 550        "BEGIN": TokenType.BEGIN,
 551        "BETWEEN": TokenType.BETWEEN,
 552        "CACHE": TokenType.CACHE,
 553        "UNCACHE": TokenType.UNCACHE,
 554        "CASE": TokenType.CASE,
 555        "CHARACTER SET": TokenType.CHARACTER_SET,
 556        "CLUSTER BY": TokenType.CLUSTER_BY,
 557        "COLLATE": TokenType.COLLATE,
 558        "COLUMN": TokenType.COLUMN,
 559        "COMMIT": TokenType.COMMIT,
 560        "CONNECT BY": TokenType.CONNECT_BY,
 561        "CONSTRAINT": TokenType.CONSTRAINT,
 562        "CREATE": TokenType.CREATE,
 563        "CROSS": TokenType.CROSS,
 564        "CUBE": TokenType.CUBE,
 565        "CURRENT_DATE": TokenType.CURRENT_DATE,
 566        "CURRENT_TIME": TokenType.CURRENT_TIME,
 567        "CURRENT_TIMESTAMP": TokenType.CURRENT_TIMESTAMP,
 568        "CURRENT_USER": TokenType.CURRENT_USER,
 569        "DATABASE": TokenType.DATABASE,
 570        "DEFAULT": TokenType.DEFAULT,
 571        "DELETE": TokenType.DELETE,
 572        "DESC": TokenType.DESC,
 573        "DESCRIBE": TokenType.DESCRIBE,
 574        "DISTINCT": TokenType.DISTINCT,
 575        "DISTRIBUTE BY": TokenType.DISTRIBUTE_BY,
 576        "DIV": TokenType.DIV,
 577        "DROP": TokenType.DROP,
 578        "ELSE": TokenType.ELSE,
 579        "END": TokenType.END,
 580        "ESCAPE": TokenType.ESCAPE,
 581        "EXCEPT": TokenType.EXCEPT,
 582        "EXECUTE": TokenType.EXECUTE,
 583        "EXISTS": TokenType.EXISTS,
 584        "FALSE": TokenType.FALSE,
 585        "FETCH": TokenType.FETCH,
 586        "FILTER": TokenType.FILTER,
 587        "FIRST": TokenType.FIRST,
 588        "FULL": TokenType.FULL,
 589        "FUNCTION": TokenType.FUNCTION,
 590        "FOR": TokenType.FOR,
 591        "FOREIGN KEY": TokenType.FOREIGN_KEY,
 592        "FORMAT": TokenType.FORMAT,
 593        "FROM": TokenType.FROM,
 594        "GEOGRAPHY": TokenType.GEOGRAPHY,
 595        "GEOMETRY": TokenType.GEOMETRY,
 596        "GLOB": TokenType.GLOB,
 597        "GROUP BY": TokenType.GROUP_BY,
 598        "GROUPING SETS": TokenType.GROUPING_SETS,
 599        "HAVING": TokenType.HAVING,
 600        "ILIKE": TokenType.ILIKE,
 601        "IN": TokenType.IN,
 602        "INDEX": TokenType.INDEX,
 603        "INET": TokenType.INET,
 604        "INNER": TokenType.INNER,
 605        "INSERT": TokenType.INSERT,
 606        "INTERVAL": TokenType.INTERVAL,
 607        "INTERSECT": TokenType.INTERSECT,
 608        "INTO": TokenType.INTO,
 609        "IS": TokenType.IS,
 610        "ISNULL": TokenType.ISNULL,
 611        "JOIN": TokenType.JOIN,
 612        "KEEP": TokenType.KEEP,
 613        "KILL": TokenType.KILL,
 614        "LATERAL": TokenType.LATERAL,
 615        "LEFT": TokenType.LEFT,
 616        "LIKE": TokenType.LIKE,
 617        "LIMIT": TokenType.LIMIT,
 618        "LOAD": TokenType.LOAD,
 619        "LOCK": TokenType.LOCK,
 620        "MERGE": TokenType.MERGE,
 621        "NATURAL": TokenType.NATURAL,
 622        "NEXT": TokenType.NEXT,
 623        "NOT": TokenType.NOT,
 624        "NOTNULL": TokenType.NOTNULL,
 625        "NULL": TokenType.NULL,
 626        "OBJECT": TokenType.OBJECT,
 627        "OFFSET": TokenType.OFFSET,
 628        "ON": TokenType.ON,
 629        "OR": TokenType.OR,
 630        "XOR": TokenType.XOR,
 631        "ORDER BY": TokenType.ORDER_BY,
 632        "ORDINALITY": TokenType.ORDINALITY,
 633        "OUTER": TokenType.OUTER,
 634        "OVER": TokenType.OVER,
 635        "OVERLAPS": TokenType.OVERLAPS,
 636        "OVERWRITE": TokenType.OVERWRITE,
 637        "PARTITION": TokenType.PARTITION,
 638        "PARTITION BY": TokenType.PARTITION_BY,
 639        "PARTITIONED BY": TokenType.PARTITION_BY,
 640        "PARTITIONED_BY": TokenType.PARTITION_BY,
 641        "PERCENT": TokenType.PERCENT,
 642        "PIVOT": TokenType.PIVOT,
 643        "PRAGMA": TokenType.PRAGMA,
 644        "PRIMARY KEY": TokenType.PRIMARY_KEY,
 645        "PROCEDURE": TokenType.PROCEDURE,
 646        "QUALIFY": TokenType.QUALIFY,
 647        "RANGE": TokenType.RANGE,
 648        "RECURSIVE": TokenType.RECURSIVE,
 649        "REGEXP": TokenType.RLIKE,
 650        "REPLACE": TokenType.REPLACE,
 651        "RETURNING": TokenType.RETURNING,
 652        "REFERENCES": TokenType.REFERENCES,
 653        "RIGHT": TokenType.RIGHT,
 654        "RLIKE": TokenType.RLIKE,
 655        "ROLLBACK": TokenType.ROLLBACK,
 656        "ROLLUP": TokenType.ROLLUP,
 657        "ROW": TokenType.ROW,
 658        "ROWS": TokenType.ROWS,
 659        "SCHEMA": TokenType.SCHEMA,
 660        "SELECT": TokenType.SELECT,
 661        "SEMI": TokenType.SEMI,
 662        "SET": TokenType.SET,
 663        "SETTINGS": TokenType.SETTINGS,
 664        "SHOW": TokenType.SHOW,
 665        "SIMILAR TO": TokenType.SIMILAR_TO,
 666        "SOME": TokenType.SOME,
 667        "SORT BY": TokenType.SORT_BY,
 668        "START WITH": TokenType.START_WITH,
 669        "TABLE": TokenType.TABLE,
 670        "TABLESAMPLE": TokenType.TABLE_SAMPLE,
 671        "TEMP": TokenType.TEMPORARY,
 672        "TEMPORARY": TokenType.TEMPORARY,
 673        "THEN": TokenType.THEN,
 674        "TRUE": TokenType.TRUE,
 675        "UNION": TokenType.UNION,
 676        "UNKNOWN": TokenType.UNKNOWN,
 677        "UNNEST": TokenType.UNNEST,
 678        "UNPIVOT": TokenType.UNPIVOT,
 679        "UPDATE": TokenType.UPDATE,
 680        "USE": TokenType.USE,
 681        "USING": TokenType.USING,
 682        "UUID": TokenType.UUID,
 683        "VALUES": TokenType.VALUES,
 684        "VIEW": TokenType.VIEW,
 685        "VOLATILE": TokenType.VOLATILE,
 686        "WHEN": TokenType.WHEN,
 687        "WHERE": TokenType.WHERE,
 688        "WINDOW": TokenType.WINDOW,
 689        "WITH": TokenType.WITH,
 690        "APPLY": TokenType.APPLY,
 691        "ARRAY": TokenType.ARRAY,
 692        "BIT": TokenType.BIT,
 693        "BOOL": TokenType.BOOLEAN,
 694        "BOOLEAN": TokenType.BOOLEAN,
 695        "BYTE": TokenType.TINYINT,
 696        "MEDIUMINT": TokenType.MEDIUMINT,
 697        "INT1": TokenType.TINYINT,
 698        "TINYINT": TokenType.TINYINT,
 699        "INT16": TokenType.SMALLINT,
 700        "SHORT": TokenType.SMALLINT,
 701        "SMALLINT": TokenType.SMALLINT,
 702        "INT128": TokenType.INT128,
 703        "HUGEINT": TokenType.INT128,
 704        "INT2": TokenType.SMALLINT,
 705        "INTEGER": TokenType.INT,
 706        "INT": TokenType.INT,
 707        "INT4": TokenType.INT,
 708        "INT32": TokenType.INT,
 709        "INT64": TokenType.BIGINT,
 710        "LONG": TokenType.BIGINT,
 711        "BIGINT": TokenType.BIGINT,
 712        "INT8": TokenType.TINYINT,
 713        "DEC": TokenType.DECIMAL,
 714        "DECIMAL": TokenType.DECIMAL,
 715        "BIGDECIMAL": TokenType.BIGDECIMAL,
 716        "BIGNUMERIC": TokenType.BIGDECIMAL,
 717        "MAP": TokenType.MAP,
 718        "NULLABLE": TokenType.NULLABLE,
 719        "NUMBER": TokenType.DECIMAL,
 720        "NUMERIC": TokenType.DECIMAL,
 721        "FIXED": TokenType.DECIMAL,
 722        "REAL": TokenType.FLOAT,
 723        "FLOAT": TokenType.FLOAT,
 724        "FLOAT4": TokenType.FLOAT,
 725        "FLOAT8": TokenType.DOUBLE,
 726        "DOUBLE": TokenType.DOUBLE,
 727        "DOUBLE PRECISION": TokenType.DOUBLE,
 728        "JSON": TokenType.JSON,
 729        "CHAR": TokenType.CHAR,
 730        "CHARACTER": TokenType.CHAR,
 731        "NCHAR": TokenType.NCHAR,
 732        "VARCHAR": TokenType.VARCHAR,
 733        "VARCHAR2": TokenType.VARCHAR,
 734        "NVARCHAR": TokenType.NVARCHAR,
 735        "NVARCHAR2": TokenType.NVARCHAR,
 736        "STR": TokenType.TEXT,
 737        "STRING": TokenType.TEXT,
 738        "TEXT": TokenType.TEXT,
 739        "LONGTEXT": TokenType.LONGTEXT,
 740        "MEDIUMTEXT": TokenType.MEDIUMTEXT,
 741        "TINYTEXT": TokenType.TINYTEXT,
 742        "CLOB": TokenType.TEXT,
 743        "LONGVARCHAR": TokenType.TEXT,
 744        "BINARY": TokenType.BINARY,
 745        "BLOB": TokenType.VARBINARY,
 746        "LONGBLOB": TokenType.LONGBLOB,
 747        "MEDIUMBLOB": TokenType.MEDIUMBLOB,
 748        "TINYBLOB": TokenType.TINYBLOB,
 749        "BYTEA": TokenType.VARBINARY,
 750        "VARBINARY": TokenType.VARBINARY,
 751        "TIME": TokenType.TIME,
 752        "TIMETZ": TokenType.TIMETZ,
 753        "TIMESTAMP": TokenType.TIMESTAMP,
 754        "TIMESTAMPTZ": TokenType.TIMESTAMPTZ,
 755        "TIMESTAMPLTZ": TokenType.TIMESTAMPLTZ,
 756        "DATE": TokenType.DATE,
 757        "DATETIME": TokenType.DATETIME,
 758        "INT4RANGE": TokenType.INT4RANGE,
 759        "INT4MULTIRANGE": TokenType.INT4MULTIRANGE,
 760        "INT8RANGE": TokenType.INT8RANGE,
 761        "INT8MULTIRANGE": TokenType.INT8MULTIRANGE,
 762        "NUMRANGE": TokenType.NUMRANGE,
 763        "NUMMULTIRANGE": TokenType.NUMMULTIRANGE,
 764        "TSRANGE": TokenType.TSRANGE,
 765        "TSMULTIRANGE": TokenType.TSMULTIRANGE,
 766        "TSTZRANGE": TokenType.TSTZRANGE,
 767        "TSTZMULTIRANGE": TokenType.TSTZMULTIRANGE,
 768        "DATERANGE": TokenType.DATERANGE,
 769        "DATEMULTIRANGE": TokenType.DATEMULTIRANGE,
 770        "UNIQUE": TokenType.UNIQUE,
 771        "STRUCT": TokenType.STRUCT,
 772        "VARIANT": TokenType.VARIANT,
 773        "ALTER": TokenType.ALTER,
 774        "ANALYZE": TokenType.COMMAND,
 775        "CALL": TokenType.COMMAND,
 776        "COMMENT": TokenType.COMMENT,
 777        "COPY": TokenType.COMMAND,
 778        "EXPLAIN": TokenType.COMMAND,
 779        "GRANT": TokenType.COMMAND,
 780        "OPTIMIZE": TokenType.COMMAND,
 781        "PREPARE": TokenType.COMMAND,
 782        "TRUNCATE": TokenType.COMMAND,
 783        "VACUUM": TokenType.COMMAND,
 784        "USER-DEFINED": TokenType.USERDEFINED,
 785        "FOR VERSION": TokenType.VERSION_SNAPSHOT,
 786        "FOR TIMESTAMP": TokenType.TIMESTAMP_SNAPSHOT,
 787    }
 788
 789    WHITE_SPACE: t.Dict[t.Optional[str], TokenType] = {
 790        " ": TokenType.SPACE,
 791        "\t": TokenType.SPACE,
 792        "\n": TokenType.BREAK,
 793        "\r": TokenType.BREAK,
 794        "\r\n": TokenType.BREAK,
 795    }
 796
 797    COMMANDS = {
 798        TokenType.COMMAND,
 799        TokenType.EXECUTE,
 800        TokenType.FETCH,
 801        TokenType.SHOW,
 802    }
 803
 804    COMMAND_PREFIX_TOKENS = {TokenType.SEMICOLON, TokenType.BEGIN}
 805
 806    # handle numeric literals like in hive (3L = BIGINT)
 807    NUMERIC_LITERALS: t.Dict[str, str] = {}
 808    ENCODE: t.Optional[str] = None
 809
 810    COMMENTS = ["--", ("/*", "*/")]
 811
 812    __slots__ = (
 813        "sql",
 814        "size",
 815        "tokens",
 816        "_start",
 817        "_current",
 818        "_line",
 819        "_col",
 820        "_comments",
 821        "_char",
 822        "_end",
 823        "_peek",
 824        "_prev_token_line",
 825    )
 826
 827    def __init__(self) -> None:
 828        self.reset()
 829
 830    def reset(self) -> None:
 831        self.sql = ""
 832        self.size = 0
 833        self.tokens: t.List[Token] = []
 834        self._start = 0
 835        self._current = 0
 836        self._line = 1
 837        self._col = 0
 838        self._comments: t.List[str] = []
 839
 840        self._char = ""
 841        self._end = False
 842        self._peek = ""
 843        self._prev_token_line = -1
 844
 845    def tokenize(self, sql: str) -> t.List[Token]:
 846        """Returns a list of tokens corresponding to the SQL string `sql`."""
 847        self.reset()
 848        self.sql = sql
 849        self.size = len(sql)
 850
 851        try:
 852            self._scan()
 853        except Exception as e:
 854            start = max(self._current - 50, 0)
 855            end = min(self._current + 50, self.size - 1)
 856            context = self.sql[start:end]
 857            raise TokenError(f"Error tokenizing '{context}'") from e
 858
 859        return self.tokens
 860
 861    def _scan(self, until: t.Optional[t.Callable] = None) -> None:
 862        while self.size and not self._end:
 863            current = self._current
 864
 865            # skip spaces inline rather than iteratively call advance()
 866            # for performance reasons
 867            while current < self.size:
 868                char = self.sql[current]
 869
 870                if char.isspace() and (char == " " or char == "\t"):
 871                    current += 1
 872                else:
 873                    break
 874
 875            n = current - self._current
 876            self._start = current
 877            self._advance(n if n > 1 else 1)
 878
 879            if self._char is None:
 880                break
 881
 882            if not self._char.isspace():
 883                if self._char.isdigit():
 884                    self._scan_number()
 885                elif self._char in self._IDENTIFIERS:
 886                    self._scan_identifier(self._IDENTIFIERS[self._char])
 887                else:
 888                    self._scan_keywords()
 889
 890            if until and until():
 891                break
 892
 893        if self.tokens and self._comments:
 894            self.tokens[-1].comments.extend(self._comments)
 895
 896    def _chars(self, size: int) -> str:
 897        if size == 1:
 898            return self._char
 899
 900        start = self._current - 1
 901        end = start + size
 902
 903        return self.sql[start:end] if end <= self.size else ""
 904
 905    def _advance(self, i: int = 1, alnum: bool = False) -> None:
 906        if self.WHITE_SPACE.get(self._char) is TokenType.BREAK:
 907            self._col = 1
 908            self._line += 1
 909        else:
 910            self._col += i
 911
 912        self._current += i
 913        self._end = self._current >= self.size
 914        self._char = self.sql[self._current - 1]
 915        self._peek = "" if self._end else self.sql[self._current]
 916
 917        if alnum and self._char.isalnum():
 918            # Here we use local variables instead of attributes for better performance
 919            _col = self._col
 920            _current = self._current
 921            _end = self._end
 922            _peek = self._peek
 923
 924            while _peek.isalnum():
 925                _col += 1
 926                _current += 1
 927                _end = _current >= self.size
 928                _peek = "" if _end else self.sql[_current]
 929
 930            self._col = _col
 931            self._current = _current
 932            self._end = _end
 933            self._peek = _peek
 934            self._char = self.sql[_current - 1]
 935
 936    @property
 937    def _text(self) -> str:
 938        return self.sql[self._start : self._current]
 939
 940    def peek(self, i: int = 0) -> str:
 941        i = self._current + i
 942        if i < self.size:
 943            return self.sql[i]
 944        return ""
 945
 946    def _add(self, token_type: TokenType, text: t.Optional[str] = None) -> None:
 947        self._prev_token_line = self._line
 948
 949        if self._comments and token_type == TokenType.SEMICOLON and self.tokens:
 950            self.tokens[-1].comments.extend(self._comments)
 951            self._comments = []
 952
 953        self.tokens.append(
 954            Token(
 955                token_type,
 956                text=self._text if text is None else text,
 957                line=self._line,
 958                col=self._col,
 959                start=self._start,
 960                end=self._current - 1,
 961                comments=self._comments,
 962            )
 963        )
 964        self._comments = []
 965
 966        # If we have either a semicolon or a begin token before the command's token, we'll parse
 967        # whatever follows the command's token as a string
 968        if (
 969            token_type in self.COMMANDS
 970            and self._peek != ";"
 971            and (len(self.tokens) == 1 or self.tokens[-2].token_type in self.COMMAND_PREFIX_TOKENS)
 972        ):
 973            start = self._current
 974            tokens = len(self.tokens)
 975            self._scan(lambda: self._peek == ";")
 976            self.tokens = self.tokens[:tokens]
 977            text = self.sql[start : self._current].strip()
 978            if text:
 979                self._add(TokenType.STRING, text)
 980
 981    def _scan_keywords(self) -> None:
 982        size = 0
 983        word = None
 984        chars = self._text
 985        char = chars
 986        prev_space = False
 987        skip = False
 988        trie = self._KEYWORD_TRIE
 989        single_token = char in self.SINGLE_TOKENS
 990
 991        while chars:
 992            if skip:
 993                result = TrieResult.PREFIX
 994            else:
 995                result, trie = in_trie(trie, char.upper())
 996
 997            if result == TrieResult.FAILED:
 998                break
 999            if result == TrieResult.EXISTS:
1000                word = chars
1001
1002            end = self._current + size
1003            size += 1
1004
1005            if end < self.size:
1006                char = self.sql[end]
1007                single_token = single_token or char in self.SINGLE_TOKENS
1008                is_space = char.isspace()
1009
1010                if not is_space or not prev_space:
1011                    if is_space:
1012                        char = " "
1013                    chars += char
1014                    prev_space = is_space
1015                    skip = False
1016                else:
1017                    skip = True
1018            else:
1019                char = ""
1020                break
1021
1022        if word:
1023            if self._scan_string(word):
1024                return
1025            if self._scan_comment(word):
1026                return
1027            if prev_space or single_token or not char:
1028                self._advance(size - 1)
1029                word = word.upper()
1030                self._add(self.KEYWORDS[word], text=word)
1031                return
1032
1033        if self._char in self.SINGLE_TOKENS:
1034            self._add(self.SINGLE_TOKENS[self._char], text=self._char)
1035            return
1036
1037        self._scan_var()
1038
1039    def _scan_comment(self, comment_start: str) -> bool:
1040        if comment_start not in self._COMMENTS:
1041            return False
1042
1043        comment_start_line = self._line
1044        comment_start_size = len(comment_start)
1045        comment_end = self._COMMENTS[comment_start]
1046
1047        if comment_end:
1048            # Skip the comment's start delimiter
1049            self._advance(comment_start_size)
1050
1051            comment_end_size = len(comment_end)
1052            while not self._end and self._chars(comment_end_size) != comment_end:
1053                self._advance(alnum=True)
1054
1055            self._comments.append(self._text[comment_start_size : -comment_end_size + 1])
1056            self._advance(comment_end_size - 1)
1057        else:
1058            while not self._end and not self.WHITE_SPACE.get(self._peek) is TokenType.BREAK:
1059                self._advance(alnum=True)
1060            self._comments.append(self._text[comment_start_size:])
1061
1062        # Leading comment is attached to the succeeding token, whilst trailing comment to the preceding.
1063        # Multiple consecutive comments are preserved by appending them to the current comments list.
1064        if comment_start_line == self._prev_token_line:
1065            self.tokens[-1].comments.extend(self._comments)
1066            self._comments = []
1067            self._prev_token_line = self._line
1068
1069        return True
1070
1071    def _scan_number(self) -> None:
1072        if self._char == "0":
1073            peek = self._peek.upper()
1074            if peek == "B":
1075                return self._scan_bits() if self.BIT_STRINGS else self._add(TokenType.NUMBER)
1076            elif peek == "X":
1077                return self._scan_hex() if self.HEX_STRINGS else self._add(TokenType.NUMBER)
1078
1079        decimal = False
1080        scientific = 0
1081
1082        while True:
1083            if self._peek.isdigit():
1084                self._advance()
1085            elif self._peek == "." and not decimal:
1086                after = self.peek(1)
1087                if after.isdigit() or not after.isalpha():
1088                    decimal = True
1089                    self._advance()
1090                else:
1091                    return self._add(TokenType.VAR)
1092            elif self._peek in ("-", "+") and scientific == 1:
1093                scientific += 1
1094                self._advance()
1095            elif self._peek.upper() == "E" and not scientific:
1096                scientific += 1
1097                self._advance()
1098            elif self._peek.isidentifier():
1099                number_text = self._text
1100                literal = ""
1101
1102                while self._peek.strip() and self._peek not in self.SINGLE_TOKENS:
1103                    literal += self._peek
1104                    self._advance()
1105
1106                token_type = self.KEYWORDS.get(self.NUMERIC_LITERALS.get(literal.upper(), ""))
1107
1108                if token_type:
1109                    self._add(TokenType.NUMBER, number_text)
1110                    self._add(TokenType.DCOLON, "::")
1111                    return self._add(token_type, literal)
1112                elif self.IDENTIFIERS_CAN_START_WITH_DIGIT:
1113                    return self._add(TokenType.VAR)
1114
1115                self._advance(-len(literal))
1116                return self._add(TokenType.NUMBER, number_text)
1117            else:
1118                return self._add(TokenType.NUMBER)
1119
1120    def _scan_bits(self) -> None:
1121        self._advance()
1122        value = self._extract_value()
1123        try:
1124            # If `value` can't be converted to a binary, fallback to tokenizing it as an identifier
1125            int(value, 2)
1126            self._add(TokenType.BIT_STRING, value[2:])  # Drop the 0b
1127        except ValueError:
1128            self._add(TokenType.IDENTIFIER)
1129
1130    def _scan_hex(self) -> None:
1131        self._advance()
1132        value = self._extract_value()
1133        try:
1134            # If `value` can't be converted to a hex, fallback to tokenizing it as an identifier
1135            int(value, 16)
1136            self._add(TokenType.HEX_STRING, value[2:])  # Drop the 0x
1137        except ValueError:
1138            self._add(TokenType.IDENTIFIER)
1139
1140    def _extract_value(self) -> str:
1141        while True:
1142            char = self._peek.strip()
1143            if char and char not in self.SINGLE_TOKENS:
1144                self._advance(alnum=True)
1145            else:
1146                break
1147
1148        return self._text
1149
1150    def _scan_string(self, start: str) -> bool:
1151        base = None
1152        token_type = TokenType.STRING
1153
1154        if start in self._QUOTES:
1155            end = self._QUOTES[start]
1156        elif start in self._FORMAT_STRINGS:
1157            end, token_type = self._FORMAT_STRINGS[start]
1158
1159            if token_type == TokenType.HEX_STRING:
1160                base = 16
1161            elif token_type == TokenType.BIT_STRING:
1162                base = 2
1163            elif token_type == TokenType.HEREDOC_STRING:
1164                self._advance()
1165                tag = "" if self._char == end else self._extract_string(end)
1166                end = f"{start}{tag}{end}"
1167        else:
1168            return False
1169
1170        self._advance(len(start))
1171        text = self._extract_string(end)
1172
1173        if base:
1174            try:
1175                int(text, base)
1176            except:
1177                raise TokenError(
1178                    f"Numeric string contains invalid characters from {self._line}:{self._start}"
1179                )
1180        else:
1181            text = text.encode(self.ENCODE).decode(self.ENCODE) if self.ENCODE else text
1182
1183        self._add(token_type, text)
1184        return True
1185
1186    def _scan_identifier(self, identifier_end: str) -> None:
1187        self._advance()
1188        text = self._extract_string(identifier_end, self._IDENTIFIER_ESCAPES)
1189        self._add(TokenType.IDENTIFIER, text)
1190
1191    def _scan_var(self) -> None:
1192        while True:
1193            char = self._peek.strip()
1194            if char and (char in self.VAR_SINGLE_TOKENS or char not in self.SINGLE_TOKENS):
1195                self._advance(alnum=True)
1196            else:
1197                break
1198
1199        self._add(
1200            TokenType.VAR
1201            if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER
1202            else self.KEYWORDS.get(self._text.upper(), TokenType.VAR)
1203        )
1204
1205    def _extract_string(self, delimiter: str, escapes=None) -> str:
1206        text = ""
1207        delim_size = len(delimiter)
1208        escapes = self._STRING_ESCAPES if escapes is None else escapes
1209
1210        while True:
1211            if (
1212                self._char in escapes
1213                and (self._peek == delimiter or self._peek in escapes)
1214                and (self._char not in self._QUOTES or self._char == self._peek)
1215            ):
1216                if self._peek == delimiter:
1217                    text += self._peek
1218                else:
1219                    text += self._char + self._peek
1220
1221                if self._current + 1 < self.size:
1222                    self._advance(2)
1223                else:
1224                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._current}")
1225            else:
1226                if self._chars(delim_size) == delimiter:
1227                    if delim_size > 1:
1228                        self._advance(delim_size - 1)
1229                    break
1230
1231                if self._end:
1232                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._start}")
1233
1234                if self.ESCAPE_SEQUENCES and self._peek and self._char in self.STRING_ESCAPES:
1235                    escaped_sequence = self.ESCAPE_SEQUENCES.get(self._char + self._peek)
1236                    if escaped_sequence:
1237                        self._advance(2)
1238                        text += escaped_sequence
1239                        continue
1240
1241                current = self._current - 1
1242                self._advance(alnum=True)
1243                text += self.sql[current : self._current - 1]
1244
1245        return text
class TokenType(sqlglot.helper.AutoName):
 12class TokenType(AutoName):
 13    L_PAREN = auto()
 14    R_PAREN = auto()
 15    L_BRACKET = auto()
 16    R_BRACKET = auto()
 17    L_BRACE = auto()
 18    R_BRACE = auto()
 19    COMMA = auto()
 20    DOT = auto()
 21    DASH = auto()
 22    PLUS = auto()
 23    COLON = auto()
 24    DCOLON = auto()
 25    DQMARK = auto()
 26    SEMICOLON = auto()
 27    STAR = auto()
 28    BACKSLASH = auto()
 29    SLASH = auto()
 30    LT = auto()
 31    LTE = auto()
 32    GT = auto()
 33    GTE = auto()
 34    NOT = auto()
 35    EQ = auto()
 36    NEQ = auto()
 37    NULLSAFE_EQ = auto()
 38    COLON_EQ = auto()
 39    AND = auto()
 40    OR = auto()
 41    AMP = auto()
 42    DPIPE = auto()
 43    PIPE = auto()
 44    CARET = auto()
 45    TILDA = auto()
 46    ARROW = auto()
 47    DARROW = auto()
 48    FARROW = auto()
 49    HASH = auto()
 50    HASH_ARROW = auto()
 51    DHASH_ARROW = auto()
 52    LR_ARROW = auto()
 53    DAT = auto()
 54    LT_AT = auto()
 55    AT_GT = auto()
 56    DOLLAR = auto()
 57    PARAMETER = auto()
 58    SESSION_PARAMETER = auto()
 59    DAMP = auto()
 60    XOR = auto()
 61    DSTAR = auto()
 62
 63    BLOCK_START = auto()
 64    BLOCK_END = auto()
 65
 66    SPACE = auto()
 67    BREAK = auto()
 68
 69    STRING = auto()
 70    NUMBER = auto()
 71    IDENTIFIER = auto()
 72    DATABASE = auto()
 73    COLUMN = auto()
 74    COLUMN_DEF = auto()
 75    SCHEMA = auto()
 76    TABLE = auto()
 77    VAR = auto()
 78    BIT_STRING = auto()
 79    HEX_STRING = auto()
 80    BYTE_STRING = auto()
 81    NATIONAL_STRING = auto()
 82    RAW_STRING = auto()
 83    HEREDOC_STRING = auto()
 84
 85    # types
 86    BIT = auto()
 87    BOOLEAN = auto()
 88    TINYINT = auto()
 89    UTINYINT = auto()
 90    SMALLINT = auto()
 91    USMALLINT = auto()
 92    MEDIUMINT = auto()
 93    UMEDIUMINT = auto()
 94    INT = auto()
 95    UINT = auto()
 96    BIGINT = auto()
 97    UBIGINT = auto()
 98    INT128 = auto()
 99    UINT128 = auto()
100    INT256 = auto()
101    UINT256 = auto()
102    FLOAT = auto()
103    DOUBLE = auto()
104    DECIMAL = auto()
105    UDECIMAL = auto()
106    BIGDECIMAL = auto()
107    CHAR = auto()
108    NCHAR = auto()
109    VARCHAR = auto()
110    NVARCHAR = auto()
111    TEXT = auto()
112    MEDIUMTEXT = auto()
113    LONGTEXT = auto()
114    MEDIUMBLOB = auto()
115    LONGBLOB = auto()
116    TINYBLOB = auto()
117    TINYTEXT = auto()
118    BINARY = auto()
119    VARBINARY = auto()
120    JSON = auto()
121    JSONB = auto()
122    TIME = auto()
123    TIMETZ = auto()
124    TIMESTAMP = auto()
125    TIMESTAMPTZ = auto()
126    TIMESTAMPLTZ = auto()
127    TIMESTAMP_S = auto()
128    TIMESTAMP_MS = auto()
129    TIMESTAMP_NS = auto()
130    DATETIME = auto()
131    DATETIME64 = auto()
132    DATE = auto()
133    INT4RANGE = auto()
134    INT4MULTIRANGE = auto()
135    INT8RANGE = auto()
136    INT8MULTIRANGE = auto()
137    NUMRANGE = auto()
138    NUMMULTIRANGE = auto()
139    TSRANGE = auto()
140    TSMULTIRANGE = auto()
141    TSTZRANGE = auto()
142    TSTZMULTIRANGE = auto()
143    DATERANGE = auto()
144    DATEMULTIRANGE = auto()
145    UUID = auto()
146    GEOGRAPHY = auto()
147    NULLABLE = auto()
148    GEOMETRY = auto()
149    HLLSKETCH = auto()
150    HSTORE = auto()
151    SUPER = auto()
152    SERIAL = auto()
153    SMALLSERIAL = auto()
154    BIGSERIAL = auto()
155    XML = auto()
156    YEAR = auto()
157    UNIQUEIDENTIFIER = auto()
158    USERDEFINED = auto()
159    MONEY = auto()
160    SMALLMONEY = auto()
161    ROWVERSION = auto()
162    IMAGE = auto()
163    VARIANT = auto()
164    OBJECT = auto()
165    INET = auto()
166    IPADDRESS = auto()
167    IPPREFIX = auto()
168    ENUM = auto()
169    ENUM8 = auto()
170    ENUM16 = auto()
171    FIXEDSTRING = auto()
172    LOWCARDINALITY = auto()
173    NESTED = auto()
174    UNKNOWN = auto()
175
176    # keywords
177    ALIAS = auto()
178    ALTER = auto()
179    ALWAYS = auto()
180    ALL = auto()
181    ANTI = auto()
182    ANY = auto()
183    APPLY = auto()
184    ARRAY = auto()
185    ASC = auto()
186    ASOF = auto()
187    AUTO_INCREMENT = auto()
188    BEGIN = auto()
189    BETWEEN = auto()
190    CACHE = auto()
191    CASE = auto()
192    CHARACTER_SET = auto()
193    CLUSTER_BY = auto()
194    COLLATE = auto()
195    COMMAND = auto()
196    COMMENT = auto()
197    COMMIT = auto()
198    CONNECT_BY = auto()
199    CONSTRAINT = auto()
200    CREATE = auto()
201    CROSS = auto()
202    CUBE = auto()
203    CURRENT_DATE = auto()
204    CURRENT_DATETIME = auto()
205    CURRENT_TIME = auto()
206    CURRENT_TIMESTAMP = auto()
207    CURRENT_USER = auto()
208    DEFAULT = auto()
209    DELETE = auto()
210    DESC = auto()
211    DESCRIBE = auto()
212    DICTIONARY = auto()
213    DISTINCT = auto()
214    DISTRIBUTE_BY = auto()
215    DIV = auto()
216    DROP = auto()
217    ELSE = auto()
218    END = auto()
219    ESCAPE = auto()
220    EXCEPT = auto()
221    EXECUTE = auto()
222    EXISTS = auto()
223    FALSE = auto()
224    FETCH = auto()
225    FILTER = auto()
226    FINAL = auto()
227    FIRST = auto()
228    FOR = auto()
229    FORCE = auto()
230    FOREIGN_KEY = auto()
231    FORMAT = auto()
232    FROM = auto()
233    FULL = auto()
234    FUNCTION = auto()
235    GLOB = auto()
236    GLOBAL = auto()
237    GROUP_BY = auto()
238    GROUPING_SETS = auto()
239    HAVING = auto()
240    HINT = auto()
241    IGNORE = auto()
242    ILIKE = auto()
243    ILIKE_ANY = auto()
244    IN = auto()
245    INDEX = auto()
246    INNER = auto()
247    INSERT = auto()
248    INTERSECT = auto()
249    INTERVAL = auto()
250    INTO = auto()
251    INTRODUCER = auto()
252    IRLIKE = auto()
253    IS = auto()
254    ISNULL = auto()
255    JOIN = auto()
256    JOIN_MARKER = auto()
257    KEEP = auto()
258    KILL = auto()
259    LANGUAGE = auto()
260    LATERAL = auto()
261    LEFT = auto()
262    LIKE = auto()
263    LIKE_ANY = auto()
264    LIMIT = auto()
265    LOAD = auto()
266    LOCK = auto()
267    MAP = auto()
268    MATCH_RECOGNIZE = auto()
269    MEMBER_OF = auto()
270    MERGE = auto()
271    MOD = auto()
272    MODEL = auto()
273    NATURAL = auto()
274    NEXT = auto()
275    NOTNULL = auto()
276    NULL = auto()
277    OBJECT_IDENTIFIER = auto()
278    OFFSET = auto()
279    ON = auto()
280    OPERATOR = auto()
281    ORDER_BY = auto()
282    ORDERED = auto()
283    ORDINALITY = auto()
284    OUTER = auto()
285    OVER = auto()
286    OVERLAPS = auto()
287    OVERWRITE = auto()
288    PARTITION = auto()
289    PARTITION_BY = auto()
290    PERCENT = auto()
291    PIVOT = auto()
292    PLACEHOLDER = auto()
293    PRAGMA = auto()
294    PRIMARY_KEY = auto()
295    PROCEDURE = auto()
296    PROPERTIES = auto()
297    PSEUDO_TYPE = auto()
298    QUALIFY = auto()
299    QUOTE = auto()
300    RANGE = auto()
301    RECURSIVE = auto()
302    REFRESH = auto()
303    REPLACE = auto()
304    RETURNING = auto()
305    REFERENCES = auto()
306    RIGHT = auto()
307    RLIKE = auto()
308    ROLLBACK = auto()
309    ROLLUP = auto()
310    ROW = auto()
311    ROWS = auto()
312    SELECT = auto()
313    SEMI = auto()
314    SEPARATOR = auto()
315    SERDE_PROPERTIES = auto()
316    SET = auto()
317    SETTINGS = auto()
318    SHOW = auto()
319    SIMILAR_TO = auto()
320    SOME = auto()
321    SORT_BY = auto()
322    START_WITH = auto()
323    STRUCT = auto()
324    TABLE_SAMPLE = auto()
325    TEMPORARY = auto()
326    TOP = auto()
327    THEN = auto()
328    TRUE = auto()
329    UNCACHE = auto()
330    UNION = auto()
331    UNNEST = auto()
332    UNPIVOT = auto()
333    UPDATE = auto()
334    USE = auto()
335    USING = auto()
336    VALUES = auto()
337    VIEW = auto()
338    VOLATILE = auto()
339    WHEN = auto()
340    WHERE = auto()
341    WINDOW = auto()
342    WITH = auto()
343    UNIQUE = auto()
344    VERSION_SNAPSHOT = auto()
345    TIMESTAMP_SNAPSHOT = 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'>
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 = <TokenType.PIPE: 'PIPE'>
CARET = <TokenType.CARET: 'CARET'>
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'>
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'>
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'>
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'>
DECIMAL = <TokenType.DECIMAL: 'DECIMAL'>
UDECIMAL = <TokenType.UDECIMAL: 'UDECIMAL'>
BIGDECIMAL = <TokenType.BIGDECIMAL: 'BIGDECIMAL'>
CHAR = <TokenType.CHAR: 'CHAR'>
NCHAR = <TokenType.NCHAR: 'NCHAR'>
VARCHAR = <TokenType.VARCHAR: 'VARCHAR'>
NVARCHAR = <TokenType.NVARCHAR: 'NVARCHAR'>
TEXT = <TokenType.TEXT: 'TEXT'>
MEDIUMTEXT = <TokenType.MEDIUMTEXT: 'MEDIUMTEXT'>
LONGTEXT = <TokenType.LONGTEXT: 'LONGTEXT'>
MEDIUMBLOB = <TokenType.MEDIUMBLOB: 'MEDIUMBLOB'>
LONGBLOB = <TokenType.LONGBLOB: 'LONGBLOB'>
TINYBLOB = <TokenType.TINYBLOB: 'TINYBLOB'>
TINYTEXT = <TokenType.TINYTEXT: 'TINYTEXT'>
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'>
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'>
DATETIME64 = <TokenType.DATETIME64: 'DATETIME64'>
DATE = <TokenType.DATE: 'DATE'>
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'>
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'>
UNIQUEIDENTIFIER = <TokenType.UNIQUEIDENTIFIER: 'UNIQUEIDENTIFIER'>
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'>
ENUM = <TokenType.ENUM: 'ENUM'>
ENUM8 = <TokenType.ENUM8: 'ENUM8'>
ENUM16 = <TokenType.ENUM16: 'ENUM16'>
FIXEDSTRING = <TokenType.FIXEDSTRING: 'FIXEDSTRING'>
LOWCARDINALITY = <TokenType.LOWCARDINALITY: 'LOWCARDINALITY'>
NESTED = <TokenType.NESTED: 'NESTED'>
UNKNOWN = <TokenType.UNKNOWN: 'UNKNOWN'>
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'>
AUTO_INCREMENT = <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>
BEGIN = <TokenType.BEGIN: 'BEGIN'>
BETWEEN = <TokenType.BETWEEN: 'BETWEEN'>
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'>
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_TIME = <TokenType.CURRENT_TIME: 'CURRENT_TIME'>
CURRENT_TIMESTAMP = <TokenType.CURRENT_TIMESTAMP: 'CURRENT_TIMESTAMP'>
CURRENT_USER = <TokenType.CURRENT_USER: 'CURRENT_USER'>
DEFAULT = <TokenType.DEFAULT: 'DEFAULT'>
DELETE = <TokenType.DELETE: 'DELETE'>
DESC = <TokenType.DESC: 'DESC'>
DESCRIBE = <TokenType.DESCRIBE: 'DESCRIBE'>
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'>
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'>
GLOB = <TokenType.GLOB: 'GLOB'>
GLOBAL = <TokenType.GLOBAL: 'GLOBAL'>
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'>
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'>
LOAD = <TokenType.LOAD: 'LOAD'>
LOCK = <TokenType.LOCK: 'LOCK'>
MAP = <TokenType.MAP: 'MAP'>
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'>
NOTNULL = <TokenType.NOTNULL: 'NOTNULL'>
NULL = <TokenType.NULL: 'NULL'>
OBJECT_IDENTIFIER = <TokenType.OBJECT_IDENTIFIER: 'OBJECT_IDENTIFIER'>
OFFSET = <TokenType.OFFSET: 'OFFSET'>
ON = <TokenType.ON: 'ON'>
OPERATOR = <TokenType.OPERATOR: 'OPERATOR'>
ORDER_BY = <TokenType.ORDER_BY: 'ORDER_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'>
PRAGMA = <TokenType.PRAGMA: 'PRAGMA'>
PRIMARY_KEY = <TokenType.PRIMARY_KEY: 'PRIMARY_KEY'>
PROCEDURE = <TokenType.PROCEDURE: 'PROCEDURE'>
PROPERTIES = <TokenType.PROPERTIES: 'PROPERTIES'>
PSEUDO_TYPE = <TokenType.PSEUDO_TYPE: 'PSEUDO_TYPE'>
QUALIFY = <TokenType.QUALIFY: 'QUALIFY'>
QUOTE = <TokenType.QUOTE: 'QUOTE'>
RANGE = <TokenType.RANGE: 'RANGE'>
RECURSIVE = <TokenType.RECURSIVE: 'RECURSIVE'>
REFRESH = <TokenType.REFRESH: 'REFRESH'>
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'>
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'>
STRUCT = <TokenType.STRUCT: 'STRUCT'>
TABLE_SAMPLE = <TokenType.TABLE_SAMPLE: 'TABLE_SAMPLE'>
TEMPORARY = <TokenType.TEMPORARY: 'TEMPORARY'>
TOP = <TokenType.TOP: 'TOP'>
THEN = <TokenType.THEN: 'THEN'>
TRUE = <TokenType.TRUE: 'TRUE'>
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'>
Inherited Members
enum.Enum
name
value
class Token:
348class Token:
349    __slots__ = ("token_type", "text", "line", "col", "start", "end", "comments")
350
351    @classmethod
352    def number(cls, number: int) -> Token:
353        """Returns a NUMBER token with `number` as its text."""
354        return cls(TokenType.NUMBER, str(number))
355
356    @classmethod
357    def string(cls, string: str) -> Token:
358        """Returns a STRING token with `string` as its text."""
359        return cls(TokenType.STRING, string)
360
361    @classmethod
362    def identifier(cls, identifier: str) -> Token:
363        """Returns an IDENTIFIER token with `identifier` as its text."""
364        return cls(TokenType.IDENTIFIER, identifier)
365
366    @classmethod
367    def var(cls, var: str) -> Token:
368        """Returns an VAR token with `var` as its text."""
369        return cls(TokenType.VAR, var)
370
371    def __init__(
372        self,
373        token_type: TokenType,
374        text: str,
375        line: int = 1,
376        col: int = 1,
377        start: int = 0,
378        end: int = 0,
379        comments: t.Optional[t.List[str]] = None,
380    ) -> None:
381        """Token initializer.
382
383        Args:
384            token_type: The TokenType Enum.
385            text: The text of the token.
386            line: The line that the token ends on.
387            col: The column that the token ends on.
388            start: The start index of the token.
389            end: The ending index of the token.
390            comments: The comments to attach to the token.
391        """
392        self.token_type = token_type
393        self.text = text
394        self.line = line
395        self.col = col
396        self.start = start
397        self.end = end
398        self.comments = [] if comments is None else comments
399
400    def __repr__(self) -> str:
401        attributes = ", ".join(f"{k}: {getattr(self, k)}" for k in self.__slots__)
402        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)
371    def __init__(
372        self,
373        token_type: TokenType,
374        text: str,
375        line: int = 1,
376        col: int = 1,
377        start: int = 0,
378        end: int = 0,
379        comments: t.Optional[t.List[str]] = None,
380    ) -> None:
381        """Token initializer.
382
383        Args:
384            token_type: The TokenType Enum.
385            text: The text of the token.
386            line: The line that the token ends on.
387            col: The column that the token ends on.
388            start: The start index of the token.
389            end: The ending index of the token.
390            comments: The comments to attach to the token.
391        """
392        self.token_type = token_type
393        self.text = text
394        self.line = line
395        self.col = col
396        self.start = start
397        self.end = end
398        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:
351    @classmethod
352    def number(cls, number: int) -> Token:
353        """Returns a NUMBER token with `number` as its text."""
354        return cls(TokenType.NUMBER, str(number))

Returns a NUMBER token with number as its text.

@classmethod
def string(cls, string: str) -> Token:
356    @classmethod
357    def string(cls, string: str) -> Token:
358        """Returns a STRING token with `string` as its text."""
359        return cls(TokenType.STRING, string)

Returns a STRING token with string as its text.

@classmethod
def identifier(cls, identifier: str) -> Token:
361    @classmethod
362    def identifier(cls, identifier: str) -> Token:
363        """Returns an IDENTIFIER token with `identifier` as its text."""
364        return cls(TokenType.IDENTIFIER, identifier)

Returns an IDENTIFIER token with identifier as its text.

@classmethod
def var(cls, var: str) -> Token:
366    @classmethod
367    def var(cls, var: str) -> Token:
368        """Returns an VAR token with `var` as its text."""
369        return cls(TokenType.VAR, var)

Returns an VAR token with var as its text.

token_type
text
line
col
start
end
comments
class Tokenizer:
 459class Tokenizer(metaclass=_Tokenizer):
 460    SINGLE_TOKENS = {
 461        "(": TokenType.L_PAREN,
 462        ")": TokenType.R_PAREN,
 463        "[": TokenType.L_BRACKET,
 464        "]": TokenType.R_BRACKET,
 465        "{": TokenType.L_BRACE,
 466        "}": TokenType.R_BRACE,
 467        "&": TokenType.AMP,
 468        "^": TokenType.CARET,
 469        ":": TokenType.COLON,
 470        ",": TokenType.COMMA,
 471        ".": TokenType.DOT,
 472        "-": TokenType.DASH,
 473        "=": TokenType.EQ,
 474        ">": TokenType.GT,
 475        "<": TokenType.LT,
 476        "%": TokenType.MOD,
 477        "!": TokenType.NOT,
 478        "|": TokenType.PIPE,
 479        "+": TokenType.PLUS,
 480        ";": TokenType.SEMICOLON,
 481        "/": TokenType.SLASH,
 482        "\\": TokenType.BACKSLASH,
 483        "*": TokenType.STAR,
 484        "~": TokenType.TILDA,
 485        "?": TokenType.PLACEHOLDER,
 486        "@": TokenType.PARAMETER,
 487        # used for breaking a var like x'y' but nothing else
 488        # the token type doesn't matter
 489        "'": TokenType.QUOTE,
 490        "`": TokenType.IDENTIFIER,
 491        '"': TokenType.IDENTIFIER,
 492        "#": TokenType.HASH,
 493    }
 494
 495    BIT_STRINGS: t.List[str | t.Tuple[str, str]] = []
 496    BYTE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 497    HEX_STRINGS: t.List[str | t.Tuple[str, str]] = []
 498    RAW_STRINGS: t.List[str | t.Tuple[str, str]] = []
 499    HEREDOC_STRINGS: t.List[str | t.Tuple[str, str]] = []
 500    IDENTIFIERS: t.List[str | t.Tuple[str, str]] = ['"']
 501    IDENTIFIER_ESCAPES = ['"']
 502    QUOTES: t.List[t.Tuple[str, str] | str] = ["'"]
 503    STRING_ESCAPES = ["'"]
 504    VAR_SINGLE_TOKENS: t.Set[str] = set()
 505    ESCAPE_SEQUENCES: t.Dict[str, str] = {}
 506
 507    # Autofilled
 508    IDENTIFIERS_CAN_START_WITH_DIGIT: bool = False
 509
 510    _COMMENTS: t.Dict[str, str] = {}
 511    _FORMAT_STRINGS: t.Dict[str, t.Tuple[str, TokenType]] = {}
 512    _IDENTIFIERS: t.Dict[str, str] = {}
 513    _IDENTIFIER_ESCAPES: t.Set[str] = set()
 514    _QUOTES: t.Dict[str, str] = {}
 515    _STRING_ESCAPES: t.Set[str] = set()
 516    _KEYWORD_TRIE: t.Dict = {}
 517
 518    KEYWORDS: t.Dict[str, TokenType] = {
 519        **{f"{{%{postfix}": TokenType.BLOCK_START for postfix in ("", "+", "-")},
 520        **{f"{prefix}%}}": TokenType.BLOCK_END for prefix in ("", "+", "-")},
 521        **{f"{{{{{postfix}": TokenType.BLOCK_START for postfix in ("+", "-")},
 522        **{f"{prefix}}}}}": TokenType.BLOCK_END for prefix in ("+", "-")},
 523        "/*+": TokenType.HINT,
 524        "==": TokenType.EQ,
 525        "::": TokenType.DCOLON,
 526        "||": TokenType.DPIPE,
 527        ">=": TokenType.GTE,
 528        "<=": TokenType.LTE,
 529        "<>": TokenType.NEQ,
 530        "!=": TokenType.NEQ,
 531        ":=": TokenType.COLON_EQ,
 532        "<=>": TokenType.NULLSAFE_EQ,
 533        "->": TokenType.ARROW,
 534        "->>": TokenType.DARROW,
 535        "=>": TokenType.FARROW,
 536        "#>": TokenType.HASH_ARROW,
 537        "#>>": TokenType.DHASH_ARROW,
 538        "<->": TokenType.LR_ARROW,
 539        "&&": TokenType.DAMP,
 540        "??": TokenType.DQMARK,
 541        "ALL": TokenType.ALL,
 542        "ALWAYS": TokenType.ALWAYS,
 543        "AND": TokenType.AND,
 544        "ANTI": TokenType.ANTI,
 545        "ANY": TokenType.ANY,
 546        "ASC": TokenType.ASC,
 547        "AS": TokenType.ALIAS,
 548        "ASOF": TokenType.ASOF,
 549        "AUTOINCREMENT": TokenType.AUTO_INCREMENT,
 550        "AUTO_INCREMENT": TokenType.AUTO_INCREMENT,
 551        "BEGIN": TokenType.BEGIN,
 552        "BETWEEN": TokenType.BETWEEN,
 553        "CACHE": TokenType.CACHE,
 554        "UNCACHE": TokenType.UNCACHE,
 555        "CASE": TokenType.CASE,
 556        "CHARACTER SET": TokenType.CHARACTER_SET,
 557        "CLUSTER BY": TokenType.CLUSTER_BY,
 558        "COLLATE": TokenType.COLLATE,
 559        "COLUMN": TokenType.COLUMN,
 560        "COMMIT": TokenType.COMMIT,
 561        "CONNECT BY": TokenType.CONNECT_BY,
 562        "CONSTRAINT": TokenType.CONSTRAINT,
 563        "CREATE": TokenType.CREATE,
 564        "CROSS": TokenType.CROSS,
 565        "CUBE": TokenType.CUBE,
 566        "CURRENT_DATE": TokenType.CURRENT_DATE,
 567        "CURRENT_TIME": TokenType.CURRENT_TIME,
 568        "CURRENT_TIMESTAMP": TokenType.CURRENT_TIMESTAMP,
 569        "CURRENT_USER": TokenType.CURRENT_USER,
 570        "DATABASE": TokenType.DATABASE,
 571        "DEFAULT": TokenType.DEFAULT,
 572        "DELETE": TokenType.DELETE,
 573        "DESC": TokenType.DESC,
 574        "DESCRIBE": TokenType.DESCRIBE,
 575        "DISTINCT": TokenType.DISTINCT,
 576        "DISTRIBUTE BY": TokenType.DISTRIBUTE_BY,
 577        "DIV": TokenType.DIV,
 578        "DROP": TokenType.DROP,
 579        "ELSE": TokenType.ELSE,
 580        "END": TokenType.END,
 581        "ESCAPE": TokenType.ESCAPE,
 582        "EXCEPT": TokenType.EXCEPT,
 583        "EXECUTE": TokenType.EXECUTE,
 584        "EXISTS": TokenType.EXISTS,
 585        "FALSE": TokenType.FALSE,
 586        "FETCH": TokenType.FETCH,
 587        "FILTER": TokenType.FILTER,
 588        "FIRST": TokenType.FIRST,
 589        "FULL": TokenType.FULL,
 590        "FUNCTION": TokenType.FUNCTION,
 591        "FOR": TokenType.FOR,
 592        "FOREIGN KEY": TokenType.FOREIGN_KEY,
 593        "FORMAT": TokenType.FORMAT,
 594        "FROM": TokenType.FROM,
 595        "GEOGRAPHY": TokenType.GEOGRAPHY,
 596        "GEOMETRY": TokenType.GEOMETRY,
 597        "GLOB": TokenType.GLOB,
 598        "GROUP BY": TokenType.GROUP_BY,
 599        "GROUPING SETS": TokenType.GROUPING_SETS,
 600        "HAVING": TokenType.HAVING,
 601        "ILIKE": TokenType.ILIKE,
 602        "IN": TokenType.IN,
 603        "INDEX": TokenType.INDEX,
 604        "INET": TokenType.INET,
 605        "INNER": TokenType.INNER,
 606        "INSERT": TokenType.INSERT,
 607        "INTERVAL": TokenType.INTERVAL,
 608        "INTERSECT": TokenType.INTERSECT,
 609        "INTO": TokenType.INTO,
 610        "IS": TokenType.IS,
 611        "ISNULL": TokenType.ISNULL,
 612        "JOIN": TokenType.JOIN,
 613        "KEEP": TokenType.KEEP,
 614        "KILL": TokenType.KILL,
 615        "LATERAL": TokenType.LATERAL,
 616        "LEFT": TokenType.LEFT,
 617        "LIKE": TokenType.LIKE,
 618        "LIMIT": TokenType.LIMIT,
 619        "LOAD": TokenType.LOAD,
 620        "LOCK": TokenType.LOCK,
 621        "MERGE": TokenType.MERGE,
 622        "NATURAL": TokenType.NATURAL,
 623        "NEXT": TokenType.NEXT,
 624        "NOT": TokenType.NOT,
 625        "NOTNULL": TokenType.NOTNULL,
 626        "NULL": TokenType.NULL,
 627        "OBJECT": TokenType.OBJECT,
 628        "OFFSET": TokenType.OFFSET,
 629        "ON": TokenType.ON,
 630        "OR": TokenType.OR,
 631        "XOR": TokenType.XOR,
 632        "ORDER BY": TokenType.ORDER_BY,
 633        "ORDINALITY": TokenType.ORDINALITY,
 634        "OUTER": TokenType.OUTER,
 635        "OVER": TokenType.OVER,
 636        "OVERLAPS": TokenType.OVERLAPS,
 637        "OVERWRITE": TokenType.OVERWRITE,
 638        "PARTITION": TokenType.PARTITION,
 639        "PARTITION BY": TokenType.PARTITION_BY,
 640        "PARTITIONED BY": TokenType.PARTITION_BY,
 641        "PARTITIONED_BY": TokenType.PARTITION_BY,
 642        "PERCENT": TokenType.PERCENT,
 643        "PIVOT": TokenType.PIVOT,
 644        "PRAGMA": TokenType.PRAGMA,
 645        "PRIMARY KEY": TokenType.PRIMARY_KEY,
 646        "PROCEDURE": TokenType.PROCEDURE,
 647        "QUALIFY": TokenType.QUALIFY,
 648        "RANGE": TokenType.RANGE,
 649        "RECURSIVE": TokenType.RECURSIVE,
 650        "REGEXP": TokenType.RLIKE,
 651        "REPLACE": TokenType.REPLACE,
 652        "RETURNING": TokenType.RETURNING,
 653        "REFERENCES": TokenType.REFERENCES,
 654        "RIGHT": TokenType.RIGHT,
 655        "RLIKE": TokenType.RLIKE,
 656        "ROLLBACK": TokenType.ROLLBACK,
 657        "ROLLUP": TokenType.ROLLUP,
 658        "ROW": TokenType.ROW,
 659        "ROWS": TokenType.ROWS,
 660        "SCHEMA": TokenType.SCHEMA,
 661        "SELECT": TokenType.SELECT,
 662        "SEMI": TokenType.SEMI,
 663        "SET": TokenType.SET,
 664        "SETTINGS": TokenType.SETTINGS,
 665        "SHOW": TokenType.SHOW,
 666        "SIMILAR TO": TokenType.SIMILAR_TO,
 667        "SOME": TokenType.SOME,
 668        "SORT BY": TokenType.SORT_BY,
 669        "START WITH": TokenType.START_WITH,
 670        "TABLE": TokenType.TABLE,
 671        "TABLESAMPLE": TokenType.TABLE_SAMPLE,
 672        "TEMP": TokenType.TEMPORARY,
 673        "TEMPORARY": TokenType.TEMPORARY,
 674        "THEN": TokenType.THEN,
 675        "TRUE": TokenType.TRUE,
 676        "UNION": TokenType.UNION,
 677        "UNKNOWN": TokenType.UNKNOWN,
 678        "UNNEST": TokenType.UNNEST,
 679        "UNPIVOT": TokenType.UNPIVOT,
 680        "UPDATE": TokenType.UPDATE,
 681        "USE": TokenType.USE,
 682        "USING": TokenType.USING,
 683        "UUID": TokenType.UUID,
 684        "VALUES": TokenType.VALUES,
 685        "VIEW": TokenType.VIEW,
 686        "VOLATILE": TokenType.VOLATILE,
 687        "WHEN": TokenType.WHEN,
 688        "WHERE": TokenType.WHERE,
 689        "WINDOW": TokenType.WINDOW,
 690        "WITH": TokenType.WITH,
 691        "APPLY": TokenType.APPLY,
 692        "ARRAY": TokenType.ARRAY,
 693        "BIT": TokenType.BIT,
 694        "BOOL": TokenType.BOOLEAN,
 695        "BOOLEAN": TokenType.BOOLEAN,
 696        "BYTE": TokenType.TINYINT,
 697        "MEDIUMINT": TokenType.MEDIUMINT,
 698        "INT1": TokenType.TINYINT,
 699        "TINYINT": TokenType.TINYINT,
 700        "INT16": TokenType.SMALLINT,
 701        "SHORT": TokenType.SMALLINT,
 702        "SMALLINT": TokenType.SMALLINT,
 703        "INT128": TokenType.INT128,
 704        "HUGEINT": TokenType.INT128,
 705        "INT2": TokenType.SMALLINT,
 706        "INTEGER": TokenType.INT,
 707        "INT": TokenType.INT,
 708        "INT4": TokenType.INT,
 709        "INT32": TokenType.INT,
 710        "INT64": TokenType.BIGINT,
 711        "LONG": TokenType.BIGINT,
 712        "BIGINT": TokenType.BIGINT,
 713        "INT8": TokenType.TINYINT,
 714        "DEC": TokenType.DECIMAL,
 715        "DECIMAL": TokenType.DECIMAL,
 716        "BIGDECIMAL": TokenType.BIGDECIMAL,
 717        "BIGNUMERIC": TokenType.BIGDECIMAL,
 718        "MAP": TokenType.MAP,
 719        "NULLABLE": TokenType.NULLABLE,
 720        "NUMBER": TokenType.DECIMAL,
 721        "NUMERIC": TokenType.DECIMAL,
 722        "FIXED": TokenType.DECIMAL,
 723        "REAL": TokenType.FLOAT,
 724        "FLOAT": TokenType.FLOAT,
 725        "FLOAT4": TokenType.FLOAT,
 726        "FLOAT8": TokenType.DOUBLE,
 727        "DOUBLE": TokenType.DOUBLE,
 728        "DOUBLE PRECISION": TokenType.DOUBLE,
 729        "JSON": TokenType.JSON,
 730        "CHAR": TokenType.CHAR,
 731        "CHARACTER": TokenType.CHAR,
 732        "NCHAR": TokenType.NCHAR,
 733        "VARCHAR": TokenType.VARCHAR,
 734        "VARCHAR2": TokenType.VARCHAR,
 735        "NVARCHAR": TokenType.NVARCHAR,
 736        "NVARCHAR2": TokenType.NVARCHAR,
 737        "STR": TokenType.TEXT,
 738        "STRING": TokenType.TEXT,
 739        "TEXT": TokenType.TEXT,
 740        "LONGTEXT": TokenType.LONGTEXT,
 741        "MEDIUMTEXT": TokenType.MEDIUMTEXT,
 742        "TINYTEXT": TokenType.TINYTEXT,
 743        "CLOB": TokenType.TEXT,
 744        "LONGVARCHAR": TokenType.TEXT,
 745        "BINARY": TokenType.BINARY,
 746        "BLOB": TokenType.VARBINARY,
 747        "LONGBLOB": TokenType.LONGBLOB,
 748        "MEDIUMBLOB": TokenType.MEDIUMBLOB,
 749        "TINYBLOB": TokenType.TINYBLOB,
 750        "BYTEA": TokenType.VARBINARY,
 751        "VARBINARY": TokenType.VARBINARY,
 752        "TIME": TokenType.TIME,
 753        "TIMETZ": TokenType.TIMETZ,
 754        "TIMESTAMP": TokenType.TIMESTAMP,
 755        "TIMESTAMPTZ": TokenType.TIMESTAMPTZ,
 756        "TIMESTAMPLTZ": TokenType.TIMESTAMPLTZ,
 757        "DATE": TokenType.DATE,
 758        "DATETIME": TokenType.DATETIME,
 759        "INT4RANGE": TokenType.INT4RANGE,
 760        "INT4MULTIRANGE": TokenType.INT4MULTIRANGE,
 761        "INT8RANGE": TokenType.INT8RANGE,
 762        "INT8MULTIRANGE": TokenType.INT8MULTIRANGE,
 763        "NUMRANGE": TokenType.NUMRANGE,
 764        "NUMMULTIRANGE": TokenType.NUMMULTIRANGE,
 765        "TSRANGE": TokenType.TSRANGE,
 766        "TSMULTIRANGE": TokenType.TSMULTIRANGE,
 767        "TSTZRANGE": TokenType.TSTZRANGE,
 768        "TSTZMULTIRANGE": TokenType.TSTZMULTIRANGE,
 769        "DATERANGE": TokenType.DATERANGE,
 770        "DATEMULTIRANGE": TokenType.DATEMULTIRANGE,
 771        "UNIQUE": TokenType.UNIQUE,
 772        "STRUCT": TokenType.STRUCT,
 773        "VARIANT": TokenType.VARIANT,
 774        "ALTER": TokenType.ALTER,
 775        "ANALYZE": TokenType.COMMAND,
 776        "CALL": TokenType.COMMAND,
 777        "COMMENT": TokenType.COMMENT,
 778        "COPY": TokenType.COMMAND,
 779        "EXPLAIN": TokenType.COMMAND,
 780        "GRANT": TokenType.COMMAND,
 781        "OPTIMIZE": TokenType.COMMAND,
 782        "PREPARE": TokenType.COMMAND,
 783        "TRUNCATE": TokenType.COMMAND,
 784        "VACUUM": TokenType.COMMAND,
 785        "USER-DEFINED": TokenType.USERDEFINED,
 786        "FOR VERSION": TokenType.VERSION_SNAPSHOT,
 787        "FOR TIMESTAMP": TokenType.TIMESTAMP_SNAPSHOT,
 788    }
 789
 790    WHITE_SPACE: t.Dict[t.Optional[str], TokenType] = {
 791        " ": TokenType.SPACE,
 792        "\t": TokenType.SPACE,
 793        "\n": TokenType.BREAK,
 794        "\r": TokenType.BREAK,
 795        "\r\n": TokenType.BREAK,
 796    }
 797
 798    COMMANDS = {
 799        TokenType.COMMAND,
 800        TokenType.EXECUTE,
 801        TokenType.FETCH,
 802        TokenType.SHOW,
 803    }
 804
 805    COMMAND_PREFIX_TOKENS = {TokenType.SEMICOLON, TokenType.BEGIN}
 806
 807    # handle numeric literals like in hive (3L = BIGINT)
 808    NUMERIC_LITERALS: t.Dict[str, str] = {}
 809    ENCODE: t.Optional[str] = None
 810
 811    COMMENTS = ["--", ("/*", "*/")]
 812
 813    __slots__ = (
 814        "sql",
 815        "size",
 816        "tokens",
 817        "_start",
 818        "_current",
 819        "_line",
 820        "_col",
 821        "_comments",
 822        "_char",
 823        "_end",
 824        "_peek",
 825        "_prev_token_line",
 826    )
 827
 828    def __init__(self) -> None:
 829        self.reset()
 830
 831    def reset(self) -> None:
 832        self.sql = ""
 833        self.size = 0
 834        self.tokens: t.List[Token] = []
 835        self._start = 0
 836        self._current = 0
 837        self._line = 1
 838        self._col = 0
 839        self._comments: t.List[str] = []
 840
 841        self._char = ""
 842        self._end = False
 843        self._peek = ""
 844        self._prev_token_line = -1
 845
 846    def tokenize(self, sql: str) -> t.List[Token]:
 847        """Returns a list of tokens corresponding to the SQL string `sql`."""
 848        self.reset()
 849        self.sql = sql
 850        self.size = len(sql)
 851
 852        try:
 853            self._scan()
 854        except Exception as e:
 855            start = max(self._current - 50, 0)
 856            end = min(self._current + 50, self.size - 1)
 857            context = self.sql[start:end]
 858            raise TokenError(f"Error tokenizing '{context}'") from e
 859
 860        return self.tokens
 861
 862    def _scan(self, until: t.Optional[t.Callable] = None) -> None:
 863        while self.size and not self._end:
 864            current = self._current
 865
 866            # skip spaces inline rather than iteratively call advance()
 867            # for performance reasons
 868            while current < self.size:
 869                char = self.sql[current]
 870
 871                if char.isspace() and (char == " " or char == "\t"):
 872                    current += 1
 873                else:
 874                    break
 875
 876            n = current - self._current
 877            self._start = current
 878            self._advance(n if n > 1 else 1)
 879
 880            if self._char is None:
 881                break
 882
 883            if not self._char.isspace():
 884                if self._char.isdigit():
 885                    self._scan_number()
 886                elif self._char in self._IDENTIFIERS:
 887                    self._scan_identifier(self._IDENTIFIERS[self._char])
 888                else:
 889                    self._scan_keywords()
 890
 891            if until and until():
 892                break
 893
 894        if self.tokens and self._comments:
 895            self.tokens[-1].comments.extend(self._comments)
 896
 897    def _chars(self, size: int) -> str:
 898        if size == 1:
 899            return self._char
 900
 901        start = self._current - 1
 902        end = start + size
 903
 904        return self.sql[start:end] if end <= self.size else ""
 905
 906    def _advance(self, i: int = 1, alnum: bool = False) -> None:
 907        if self.WHITE_SPACE.get(self._char) is TokenType.BREAK:
 908            self._col = 1
 909            self._line += 1
 910        else:
 911            self._col += i
 912
 913        self._current += i
 914        self._end = self._current >= self.size
 915        self._char = self.sql[self._current - 1]
 916        self._peek = "" if self._end else self.sql[self._current]
 917
 918        if alnum and self._char.isalnum():
 919            # Here we use local variables instead of attributes for better performance
 920            _col = self._col
 921            _current = self._current
 922            _end = self._end
 923            _peek = self._peek
 924
 925            while _peek.isalnum():
 926                _col += 1
 927                _current += 1
 928                _end = _current >= self.size
 929                _peek = "" if _end else self.sql[_current]
 930
 931            self._col = _col
 932            self._current = _current
 933            self._end = _end
 934            self._peek = _peek
 935            self._char = self.sql[_current - 1]
 936
 937    @property
 938    def _text(self) -> str:
 939        return self.sql[self._start : self._current]
 940
 941    def peek(self, i: int = 0) -> str:
 942        i = self._current + i
 943        if i < self.size:
 944            return self.sql[i]
 945        return ""
 946
 947    def _add(self, token_type: TokenType, text: t.Optional[str] = None) -> None:
 948        self._prev_token_line = self._line
 949
 950        if self._comments and token_type == TokenType.SEMICOLON and self.tokens:
 951            self.tokens[-1].comments.extend(self._comments)
 952            self._comments = []
 953
 954        self.tokens.append(
 955            Token(
 956                token_type,
 957                text=self._text if text is None else text,
 958                line=self._line,
 959                col=self._col,
 960                start=self._start,
 961                end=self._current - 1,
 962                comments=self._comments,
 963            )
 964        )
 965        self._comments = []
 966
 967        # If we have either a semicolon or a begin token before the command's token, we'll parse
 968        # whatever follows the command's token as a string
 969        if (
 970            token_type in self.COMMANDS
 971            and self._peek != ";"
 972            and (len(self.tokens) == 1 or self.tokens[-2].token_type in self.COMMAND_PREFIX_TOKENS)
 973        ):
 974            start = self._current
 975            tokens = len(self.tokens)
 976            self._scan(lambda: self._peek == ";")
 977            self.tokens = self.tokens[:tokens]
 978            text = self.sql[start : self._current].strip()
 979            if text:
 980                self._add(TokenType.STRING, text)
 981
 982    def _scan_keywords(self) -> None:
 983        size = 0
 984        word = None
 985        chars = self._text
 986        char = chars
 987        prev_space = False
 988        skip = False
 989        trie = self._KEYWORD_TRIE
 990        single_token = char in self.SINGLE_TOKENS
 991
 992        while chars:
 993            if skip:
 994                result = TrieResult.PREFIX
 995            else:
 996                result, trie = in_trie(trie, char.upper())
 997
 998            if result == TrieResult.FAILED:
 999                break
1000            if result == TrieResult.EXISTS:
1001                word = chars
1002
1003            end = self._current + size
1004            size += 1
1005
1006            if end < self.size:
1007                char = self.sql[end]
1008                single_token = single_token or char in self.SINGLE_TOKENS
1009                is_space = char.isspace()
1010
1011                if not is_space or not prev_space:
1012                    if is_space:
1013                        char = " "
1014                    chars += char
1015                    prev_space = is_space
1016                    skip = False
1017                else:
1018                    skip = True
1019            else:
1020                char = ""
1021                break
1022
1023        if word:
1024            if self._scan_string(word):
1025                return
1026            if self._scan_comment(word):
1027                return
1028            if prev_space or single_token or not char:
1029                self._advance(size - 1)
1030                word = word.upper()
1031                self._add(self.KEYWORDS[word], text=word)
1032                return
1033
1034        if self._char in self.SINGLE_TOKENS:
1035            self._add(self.SINGLE_TOKENS[self._char], text=self._char)
1036            return
1037
1038        self._scan_var()
1039
1040    def _scan_comment(self, comment_start: str) -> bool:
1041        if comment_start not in self._COMMENTS:
1042            return False
1043
1044        comment_start_line = self._line
1045        comment_start_size = len(comment_start)
1046        comment_end = self._COMMENTS[comment_start]
1047
1048        if comment_end:
1049            # Skip the comment's start delimiter
1050            self._advance(comment_start_size)
1051
1052            comment_end_size = len(comment_end)
1053            while not self._end and self._chars(comment_end_size) != comment_end:
1054                self._advance(alnum=True)
1055
1056            self._comments.append(self._text[comment_start_size : -comment_end_size + 1])
1057            self._advance(comment_end_size - 1)
1058        else:
1059            while not self._end and not self.WHITE_SPACE.get(self._peek) is TokenType.BREAK:
1060                self._advance(alnum=True)
1061            self._comments.append(self._text[comment_start_size:])
1062
1063        # Leading comment is attached to the succeeding token, whilst trailing comment to the preceding.
1064        # Multiple consecutive comments are preserved by appending them to the current comments list.
1065        if comment_start_line == self._prev_token_line:
1066            self.tokens[-1].comments.extend(self._comments)
1067            self._comments = []
1068            self._prev_token_line = self._line
1069
1070        return True
1071
1072    def _scan_number(self) -> None:
1073        if self._char == "0":
1074            peek = self._peek.upper()
1075            if peek == "B":
1076                return self._scan_bits() if self.BIT_STRINGS else self._add(TokenType.NUMBER)
1077            elif peek == "X":
1078                return self._scan_hex() if self.HEX_STRINGS else self._add(TokenType.NUMBER)
1079
1080        decimal = False
1081        scientific = 0
1082
1083        while True:
1084            if self._peek.isdigit():
1085                self._advance()
1086            elif self._peek == "." and not decimal:
1087                after = self.peek(1)
1088                if after.isdigit() or not after.isalpha():
1089                    decimal = True
1090                    self._advance()
1091                else:
1092                    return self._add(TokenType.VAR)
1093            elif self._peek in ("-", "+") and scientific == 1:
1094                scientific += 1
1095                self._advance()
1096            elif self._peek.upper() == "E" and not scientific:
1097                scientific += 1
1098                self._advance()
1099            elif self._peek.isidentifier():
1100                number_text = self._text
1101                literal = ""
1102
1103                while self._peek.strip() and self._peek not in self.SINGLE_TOKENS:
1104                    literal += self._peek
1105                    self._advance()
1106
1107                token_type = self.KEYWORDS.get(self.NUMERIC_LITERALS.get(literal.upper(), ""))
1108
1109                if token_type:
1110                    self._add(TokenType.NUMBER, number_text)
1111                    self._add(TokenType.DCOLON, "::")
1112                    return self._add(token_type, literal)
1113                elif self.IDENTIFIERS_CAN_START_WITH_DIGIT:
1114                    return self._add(TokenType.VAR)
1115
1116                self._advance(-len(literal))
1117                return self._add(TokenType.NUMBER, number_text)
1118            else:
1119                return self._add(TokenType.NUMBER)
1120
1121    def _scan_bits(self) -> None:
1122        self._advance()
1123        value = self._extract_value()
1124        try:
1125            # If `value` can't be converted to a binary, fallback to tokenizing it as an identifier
1126            int(value, 2)
1127            self._add(TokenType.BIT_STRING, value[2:])  # Drop the 0b
1128        except ValueError:
1129            self._add(TokenType.IDENTIFIER)
1130
1131    def _scan_hex(self) -> None:
1132        self._advance()
1133        value = self._extract_value()
1134        try:
1135            # If `value` can't be converted to a hex, fallback to tokenizing it as an identifier
1136            int(value, 16)
1137            self._add(TokenType.HEX_STRING, value[2:])  # Drop the 0x
1138        except ValueError:
1139            self._add(TokenType.IDENTIFIER)
1140
1141    def _extract_value(self) -> str:
1142        while True:
1143            char = self._peek.strip()
1144            if char and char not in self.SINGLE_TOKENS:
1145                self._advance(alnum=True)
1146            else:
1147                break
1148
1149        return self._text
1150
1151    def _scan_string(self, start: str) -> bool:
1152        base = None
1153        token_type = TokenType.STRING
1154
1155        if start in self._QUOTES:
1156            end = self._QUOTES[start]
1157        elif start in self._FORMAT_STRINGS:
1158            end, token_type = self._FORMAT_STRINGS[start]
1159
1160            if token_type == TokenType.HEX_STRING:
1161                base = 16
1162            elif token_type == TokenType.BIT_STRING:
1163                base = 2
1164            elif token_type == TokenType.HEREDOC_STRING:
1165                self._advance()
1166                tag = "" if self._char == end else self._extract_string(end)
1167                end = f"{start}{tag}{end}"
1168        else:
1169            return False
1170
1171        self._advance(len(start))
1172        text = self._extract_string(end)
1173
1174        if base:
1175            try:
1176                int(text, base)
1177            except:
1178                raise TokenError(
1179                    f"Numeric string contains invalid characters from {self._line}:{self._start}"
1180                )
1181        else:
1182            text = text.encode(self.ENCODE).decode(self.ENCODE) if self.ENCODE else text
1183
1184        self._add(token_type, text)
1185        return True
1186
1187    def _scan_identifier(self, identifier_end: str) -> None:
1188        self._advance()
1189        text = self._extract_string(identifier_end, self._IDENTIFIER_ESCAPES)
1190        self._add(TokenType.IDENTIFIER, text)
1191
1192    def _scan_var(self) -> None:
1193        while True:
1194            char = self._peek.strip()
1195            if char and (char in self.VAR_SINGLE_TOKENS or char not in self.SINGLE_TOKENS):
1196                self._advance(alnum=True)
1197            else:
1198                break
1199
1200        self._add(
1201            TokenType.VAR
1202            if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER
1203            else self.KEYWORDS.get(self._text.upper(), TokenType.VAR)
1204        )
1205
1206    def _extract_string(self, delimiter: str, escapes=None) -> str:
1207        text = ""
1208        delim_size = len(delimiter)
1209        escapes = self._STRING_ESCAPES if escapes is None else escapes
1210
1211        while True:
1212            if (
1213                self._char in escapes
1214                and (self._peek == delimiter or self._peek in escapes)
1215                and (self._char not in self._QUOTES or self._char == self._peek)
1216            ):
1217                if self._peek == delimiter:
1218                    text += self._peek
1219                else:
1220                    text += self._char + self._peek
1221
1222                if self._current + 1 < self.size:
1223                    self._advance(2)
1224                else:
1225                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._current}")
1226            else:
1227                if self._chars(delim_size) == delimiter:
1228                    if delim_size > 1:
1229                        self._advance(delim_size - 1)
1230                    break
1231
1232                if self._end:
1233                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._start}")
1234
1235                if self.ESCAPE_SEQUENCES and self._peek and self._char in self.STRING_ESCAPES:
1236                    escaped_sequence = self.ESCAPE_SEQUENCES.get(self._char + self._peek)
1237                    if escaped_sequence:
1238                        self._advance(2)
1239                        text += escaped_sequence
1240                        continue
1241
1242                current = self._current - 1
1243                self._advance(alnum=True)
1244                text += self.sql[current : self._current - 1]
1245
1246        return text
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.QUOTE: 'QUOTE'>, '`': <TokenType.IDENTIFIER: 'IDENTIFIER'>, '"': <TokenType.IDENTIFIER: 'IDENTIFIER'>, '#': <TokenType.HASH: 'HASH'>}
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]]] = []
IDENTIFIERS: List[Union[str, Tuple[str, str]]] = ['"']
IDENTIFIER_ESCAPES = ['"']
QUOTES: List[Union[str, Tuple[str, str]]] = ["'"]
STRING_ESCAPES = ["'"]
VAR_SINGLE_TOKENS: Set[str] = set()
ESCAPE_SEQUENCES: Dict[str, str] = {}
IDENTIFIERS_CAN_START_WITH_DIGIT: bool = False
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.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'>, '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'>, 'CREATE': <TokenType.CREATE: 'CREATE'>, 'CROSS': <TokenType.CROSS: 'CROSS'>, 'CUBE': <TokenType.CUBE: 'CUBE'>, 'CURRENT_DATE': <TokenType.CURRENT_DATE: 'CURRENT_DATE'>, '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'>, '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'>, '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'>, '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'>, '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'>, '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'>, 'INT128': <TokenType.INT128: 'INT128'>, 'HUGEINT': <TokenType.INT128: 'INT128'>, 'INT2': <TokenType.SMALLINT: 'SMALLINT'>, 'INTEGER': <TokenType.INT: 'INT'>, 'INT': <TokenType.INT: 'INT'>, 'INT4': <TokenType.INT: 'INT'>, 'INT32': <TokenType.INT: 'INT'>, 'INT64': <TokenType.BIGINT: 'BIGINT'>, 'LONG': <TokenType.BIGINT: 'BIGINT'>, 'BIGINT': <TokenType.BIGINT: 'BIGINT'>, 'INT8': <TokenType.TINYINT: 'TINYINT'>, 'DEC': <TokenType.DECIMAL: 'DECIMAL'>, 'DECIMAL': <TokenType.DECIMAL: 'DECIMAL'>, 'BIGDECIMAL': <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, 'BIGNUMERIC': <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, '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'>, 'CHAR': <TokenType.CHAR: 'CHAR'>, 'CHARACTER': <TokenType.CHAR: 'CHAR'>, 'NCHAR': <TokenType.NCHAR: 'NCHAR'>, 'VARCHAR': <TokenType.VARCHAR: 'VARCHAR'>, 'VARCHAR2': <TokenType.VARCHAR: 'VARCHAR'>, 'NVARCHAR': <TokenType.NVARCHAR: 'NVARCHAR'>, 'NVARCHAR2': <TokenType.NVARCHAR: 'NVARCHAR'>, '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'>, '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'>, 'STRUCT': <TokenType.STRUCT: 'STRUCT'>, 'VARIANT': <TokenType.VARIANT: 'VARIANT'>, 'ALTER': <TokenType.ALTER: 'ALTER'>, 'ANALYZE': <TokenType.COMMAND: 'COMMAND'>, 'CALL': <TokenType.COMMAND: 'COMMAND'>, 'COMMENT': <TokenType.COMMENT: 'COMMENT'>, 'COPY': <TokenType.COMMAND: 'COMMAND'>, 'EXPLAIN': <TokenType.COMMAND: 'COMMAND'>, 'GRANT': <TokenType.COMMAND: 'COMMAND'>, 'OPTIMIZE': <TokenType.COMMAND: 'COMMAND'>, 'PREPARE': <TokenType.COMMAND: 'COMMAND'>, 'TRUNCATE': <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'>, '\r\n': <TokenType.BREAK: 'BREAK'>}
COMMANDS = {<TokenType.SHOW: 'SHOW'>, <TokenType.FETCH: 'FETCH'>, <TokenType.EXECUTE: 'EXECUTE'>, <TokenType.COMMAND: 'COMMAND'>}
COMMAND_PREFIX_TOKENS = {<TokenType.SEMICOLON: 'SEMICOLON'>, <TokenType.BEGIN: 'BEGIN'>}
NUMERIC_LITERALS: Dict[str, str] = {}
ENCODE: Optional[str] = None
COMMENTS = ['--', ('/*', '*/')]
def reset(self) -> None:
831    def reset(self) -> None:
832        self.sql = ""
833        self.size = 0
834        self.tokens: t.List[Token] = []
835        self._start = 0
836        self._current = 0
837        self._line = 1
838        self._col = 0
839        self._comments: t.List[str] = []
840
841        self._char = ""
842        self._end = False
843        self._peek = ""
844        self._prev_token_line = -1
def tokenize(self, sql: str) -> List[Token]:
846    def tokenize(self, sql: str) -> t.List[Token]:
847        """Returns a list of tokens corresponding to the SQL string `sql`."""
848        self.reset()
849        self.sql = sql
850        self.size = len(sql)
851
852        try:
853            self._scan()
854        except Exception as e:
855            start = max(self._current - 50, 0)
856            end = min(self._current + 50, self.size - 1)
857            context = self.sql[start:end]
858            raise TokenError(f"Error tokenizing '{context}'") from e
859
860        return self.tokens

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

def peek(self, i: int = 0) -> str:
941    def peek(self, i: int = 0) -> str:
942        i = self._current + i
943        if i < self.size:
944            return self.sql[i]
945        return ""
size
sql
tokens