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

Returns a NUMBER token with number as its text.

@classmethod
def string(cls, string: str) -> sqlglot.tokens.Token:
343    @classmethod
344    def string(cls, string: str) -> Token:
345        """Returns a STRING token with `string` as its text."""
346        return cls(TokenType.STRING, string)

Returns a STRING token with string as its text.

@classmethod
def identifier(cls, identifier: str) -> sqlglot.tokens.Token:
348    @classmethod
349    def identifier(cls, identifier: str) -> Token:
350        """Returns an IDENTIFIER token with `identifier` as its text."""
351        return cls(TokenType.IDENTIFIER, identifier)

Returns an IDENTIFIER token with identifier as its text.

@classmethod
def var(cls, var: str) -> sqlglot.tokens.Token:
353    @classmethod
354    def var(cls, var: str) -> Token:
355        """Returns an VAR token with `var` as its text."""
356        return cls(TokenType.VAR, var)

Returns an VAR token with var as its text.

token_type
text
line
col
start
end
comments
class Tokenizer:
 445class Tokenizer(metaclass=_Tokenizer):
 446    SINGLE_TOKENS = {
 447        "(": TokenType.L_PAREN,
 448        ")": TokenType.R_PAREN,
 449        "[": TokenType.L_BRACKET,
 450        "]": TokenType.R_BRACKET,
 451        "{": TokenType.L_BRACE,
 452        "}": TokenType.R_BRACE,
 453        "&": TokenType.AMP,
 454        "^": TokenType.CARET,
 455        ":": TokenType.COLON,
 456        ",": TokenType.COMMA,
 457        ".": TokenType.DOT,
 458        "-": TokenType.DASH,
 459        "=": TokenType.EQ,
 460        ">": TokenType.GT,
 461        "<": TokenType.LT,
 462        "%": TokenType.MOD,
 463        "!": TokenType.NOT,
 464        "|": TokenType.PIPE,
 465        "+": TokenType.PLUS,
 466        ";": TokenType.SEMICOLON,
 467        "/": TokenType.SLASH,
 468        "\\": TokenType.BACKSLASH,
 469        "*": TokenType.STAR,
 470        "~": TokenType.TILDA,
 471        "?": TokenType.PLACEHOLDER,
 472        "@": TokenType.PARAMETER,
 473        # used for breaking a var like x'y' but nothing else
 474        # the token type doesn't matter
 475        "'": TokenType.QUOTE,
 476        "`": TokenType.IDENTIFIER,
 477        '"': TokenType.IDENTIFIER,
 478        "#": TokenType.HASH,
 479    }
 480
 481    BIT_STRINGS: t.List[str | t.Tuple[str, str]] = []
 482    BYTE_STRINGS: t.List[str | t.Tuple[str, str]] = []
 483    HEX_STRINGS: t.List[str | t.Tuple[str, str]] = []
 484    RAW_STRINGS: t.List[str | t.Tuple[str, str]] = []
 485    IDENTIFIERS: t.List[str | t.Tuple[str, str]] = ['"']
 486    IDENTIFIER_ESCAPES = ['"']
 487    QUOTES: t.List[t.Tuple[str, str] | str] = ["'"]
 488    STRING_ESCAPES = ["'"]
 489    VAR_SINGLE_TOKENS: t.Set[str] = set()
 490
 491    # Autofilled
 492    IDENTIFIERS_CAN_START_WITH_DIGIT: bool = False
 493
 494    _COMMENTS: t.Dict[str, str] = {}
 495    _FORMAT_STRINGS: t.Dict[str, t.Tuple[str, TokenType]] = {}
 496    _IDENTIFIERS: t.Dict[str, str] = {}
 497    _IDENTIFIER_ESCAPES: t.Set[str] = set()
 498    _QUOTES: t.Dict[str, str] = {}
 499    _STRING_ESCAPES: t.Set[str] = set()
 500    _KEYWORD_TRIE: t.Dict = {}
 501
 502    KEYWORDS: t.Dict[str, TokenType] = {
 503        **{f"{{%{postfix}": TokenType.BLOCK_START for postfix in ("", "+", "-")},
 504        **{f"{prefix}%}}": TokenType.BLOCK_END for prefix in ("", "+", "-")},
 505        **{f"{{{{{postfix}": TokenType.BLOCK_START for postfix in ("+", "-")},
 506        **{f"{prefix}}}}}": TokenType.BLOCK_END for prefix in ("+", "-")},
 507        "/*+": TokenType.HINT,
 508        "==": TokenType.EQ,
 509        "::": TokenType.DCOLON,
 510        "||": TokenType.DPIPE,
 511        ">=": TokenType.GTE,
 512        "<=": TokenType.LTE,
 513        "<>": TokenType.NEQ,
 514        "!=": TokenType.NEQ,
 515        "<=>": TokenType.NULLSAFE_EQ,
 516        "->": TokenType.ARROW,
 517        "->>": TokenType.DARROW,
 518        "=>": TokenType.FARROW,
 519        "#>": TokenType.HASH_ARROW,
 520        "#>>": TokenType.DHASH_ARROW,
 521        "<->": TokenType.LR_ARROW,
 522        "&&": TokenType.DAMP,
 523        "??": TokenType.DQMARK,
 524        "ALL": TokenType.ALL,
 525        "ALWAYS": TokenType.ALWAYS,
 526        "AND": TokenType.AND,
 527        "ANTI": TokenType.ANTI,
 528        "ANY": TokenType.ANY,
 529        "ASC": TokenType.ASC,
 530        "AS": TokenType.ALIAS,
 531        "ASOF": TokenType.ASOF,
 532        "AUTOINCREMENT": TokenType.AUTO_INCREMENT,
 533        "AUTO_INCREMENT": TokenType.AUTO_INCREMENT,
 534        "BEGIN": TokenType.BEGIN,
 535        "BETWEEN": TokenType.BETWEEN,
 536        "CACHE": TokenType.CACHE,
 537        "UNCACHE": TokenType.UNCACHE,
 538        "CASE": TokenType.CASE,
 539        "CHARACTER SET": TokenType.CHARACTER_SET,
 540        "CLUSTER BY": TokenType.CLUSTER_BY,
 541        "COLLATE": TokenType.COLLATE,
 542        "COLUMN": TokenType.COLUMN,
 543        "COMMIT": TokenType.COMMIT,
 544        "CONNECT BY": TokenType.CONNECT_BY,
 545        "CONSTRAINT": TokenType.CONSTRAINT,
 546        "CREATE": TokenType.CREATE,
 547        "CROSS": TokenType.CROSS,
 548        "CUBE": TokenType.CUBE,
 549        "CURRENT_DATE": TokenType.CURRENT_DATE,
 550        "CURRENT_TIME": TokenType.CURRENT_TIME,
 551        "CURRENT_TIMESTAMP": TokenType.CURRENT_TIMESTAMP,
 552        "CURRENT_USER": TokenType.CURRENT_USER,
 553        "DATABASE": TokenType.DATABASE,
 554        "DEFAULT": TokenType.DEFAULT,
 555        "DELETE": TokenType.DELETE,
 556        "DESC": TokenType.DESC,
 557        "DESCRIBE": TokenType.DESCRIBE,
 558        "DISTINCT": TokenType.DISTINCT,
 559        "DISTRIBUTE BY": TokenType.DISTRIBUTE_BY,
 560        "DIV": TokenType.DIV,
 561        "DROP": TokenType.DROP,
 562        "ELSE": TokenType.ELSE,
 563        "END": TokenType.END,
 564        "ESCAPE": TokenType.ESCAPE,
 565        "EXCEPT": TokenType.EXCEPT,
 566        "EXECUTE": TokenType.EXECUTE,
 567        "EXISTS": TokenType.EXISTS,
 568        "FALSE": TokenType.FALSE,
 569        "FETCH": TokenType.FETCH,
 570        "FILTER": TokenType.FILTER,
 571        "FIRST": TokenType.FIRST,
 572        "FULL": TokenType.FULL,
 573        "FUNCTION": TokenType.FUNCTION,
 574        "FOR": TokenType.FOR,
 575        "FOREIGN KEY": TokenType.FOREIGN_KEY,
 576        "FORMAT": TokenType.FORMAT,
 577        "FROM": TokenType.FROM,
 578        "GEOGRAPHY": TokenType.GEOGRAPHY,
 579        "GEOMETRY": TokenType.GEOMETRY,
 580        "GLOB": TokenType.GLOB,
 581        "GROUP BY": TokenType.GROUP_BY,
 582        "GROUPING SETS": TokenType.GROUPING_SETS,
 583        "HAVING": TokenType.HAVING,
 584        "ILIKE": TokenType.ILIKE,
 585        "IN": TokenType.IN,
 586        "INDEX": TokenType.INDEX,
 587        "INET": TokenType.INET,
 588        "INNER": TokenType.INNER,
 589        "INSERT": TokenType.INSERT,
 590        "INTERVAL": TokenType.INTERVAL,
 591        "INTERSECT": TokenType.INTERSECT,
 592        "INTO": TokenType.INTO,
 593        "IS": TokenType.IS,
 594        "ISNULL": TokenType.ISNULL,
 595        "JOIN": TokenType.JOIN,
 596        "KEEP": TokenType.KEEP,
 597        "LATERAL": TokenType.LATERAL,
 598        "LEFT": TokenType.LEFT,
 599        "LIKE": TokenType.LIKE,
 600        "LIMIT": TokenType.LIMIT,
 601        "LOAD": TokenType.LOAD,
 602        "LOCK": TokenType.LOCK,
 603        "MERGE": TokenType.MERGE,
 604        "NATURAL": TokenType.NATURAL,
 605        "NEXT": TokenType.NEXT,
 606        "NOT": TokenType.NOT,
 607        "NOTNULL": TokenType.NOTNULL,
 608        "NULL": TokenType.NULL,
 609        "OBJECT": TokenType.OBJECT,
 610        "OFFSET": TokenType.OFFSET,
 611        "ON": TokenType.ON,
 612        "OR": TokenType.OR,
 613        "XOR": TokenType.XOR,
 614        "ORDER BY": TokenType.ORDER_BY,
 615        "ORDINALITY": TokenType.ORDINALITY,
 616        "OUTER": TokenType.OUTER,
 617        "OVER": TokenType.OVER,
 618        "OVERLAPS": TokenType.OVERLAPS,
 619        "OVERWRITE": TokenType.OVERWRITE,
 620        "PARTITION": TokenType.PARTITION,
 621        "PARTITION BY": TokenType.PARTITION_BY,
 622        "PARTITIONED BY": TokenType.PARTITION_BY,
 623        "PARTITIONED_BY": TokenType.PARTITION_BY,
 624        "PERCENT": TokenType.PERCENT,
 625        "PIVOT": TokenType.PIVOT,
 626        "PRAGMA": TokenType.PRAGMA,
 627        "PRIMARY KEY": TokenType.PRIMARY_KEY,
 628        "PROCEDURE": TokenType.PROCEDURE,
 629        "QUALIFY": TokenType.QUALIFY,
 630        "RANGE": TokenType.RANGE,
 631        "RECURSIVE": TokenType.RECURSIVE,
 632        "REGEXP": TokenType.RLIKE,
 633        "REPLACE": TokenType.REPLACE,
 634        "RETURNING": TokenType.RETURNING,
 635        "REFERENCES": TokenType.REFERENCES,
 636        "RIGHT": TokenType.RIGHT,
 637        "RLIKE": TokenType.RLIKE,
 638        "ROLLBACK": TokenType.ROLLBACK,
 639        "ROLLUP": TokenType.ROLLUP,
 640        "ROW": TokenType.ROW,
 641        "ROWS": TokenType.ROWS,
 642        "SCHEMA": TokenType.SCHEMA,
 643        "SELECT": TokenType.SELECT,
 644        "SEMI": TokenType.SEMI,
 645        "SET": TokenType.SET,
 646        "SETTINGS": TokenType.SETTINGS,
 647        "SHOW": TokenType.SHOW,
 648        "SIMILAR TO": TokenType.SIMILAR_TO,
 649        "SOME": TokenType.SOME,
 650        "SORT BY": TokenType.SORT_BY,
 651        "START WITH": TokenType.START_WITH,
 652        "TABLE": TokenType.TABLE,
 653        "TABLESAMPLE": TokenType.TABLE_SAMPLE,
 654        "TEMP": TokenType.TEMPORARY,
 655        "TEMPORARY": TokenType.TEMPORARY,
 656        "THEN": TokenType.THEN,
 657        "TRUE": TokenType.TRUE,
 658        "UNION": TokenType.UNION,
 659        "UNKNOWN": TokenType.UNKNOWN,
 660        "UNNEST": TokenType.UNNEST,
 661        "UNPIVOT": TokenType.UNPIVOT,
 662        "UPDATE": TokenType.UPDATE,
 663        "USE": TokenType.USE,
 664        "USING": TokenType.USING,
 665        "UUID": TokenType.UUID,
 666        "VALUES": TokenType.VALUES,
 667        "VIEW": TokenType.VIEW,
 668        "VOLATILE": TokenType.VOLATILE,
 669        "WHEN": TokenType.WHEN,
 670        "WHERE": TokenType.WHERE,
 671        "WINDOW": TokenType.WINDOW,
 672        "WITH": TokenType.WITH,
 673        "APPLY": TokenType.APPLY,
 674        "ARRAY": TokenType.ARRAY,
 675        "BIT": TokenType.BIT,
 676        "BOOL": TokenType.BOOLEAN,
 677        "BOOLEAN": TokenType.BOOLEAN,
 678        "BYTE": TokenType.TINYINT,
 679        "TINYINT": TokenType.TINYINT,
 680        "SHORT": TokenType.SMALLINT,
 681        "SMALLINT": TokenType.SMALLINT,
 682        "INT128": TokenType.INT128,
 683        "INT2": TokenType.SMALLINT,
 684        "INTEGER": TokenType.INT,
 685        "INT": TokenType.INT,
 686        "INT4": TokenType.INT,
 687        "LONG": TokenType.BIGINT,
 688        "BIGINT": TokenType.BIGINT,
 689        "INT8": TokenType.BIGINT,
 690        "DEC": TokenType.DECIMAL,
 691        "DECIMAL": TokenType.DECIMAL,
 692        "BIGDECIMAL": TokenType.BIGDECIMAL,
 693        "BIGNUMERIC": TokenType.BIGDECIMAL,
 694        "MAP": TokenType.MAP,
 695        "NULLABLE": TokenType.NULLABLE,
 696        "NUMBER": TokenType.DECIMAL,
 697        "NUMERIC": TokenType.DECIMAL,
 698        "FIXED": TokenType.DECIMAL,
 699        "REAL": TokenType.FLOAT,
 700        "FLOAT": TokenType.FLOAT,
 701        "FLOAT4": TokenType.FLOAT,
 702        "FLOAT8": TokenType.DOUBLE,
 703        "DOUBLE": TokenType.DOUBLE,
 704        "DOUBLE PRECISION": TokenType.DOUBLE,
 705        "JSON": TokenType.JSON,
 706        "CHAR": TokenType.CHAR,
 707        "CHARACTER": TokenType.CHAR,
 708        "NCHAR": TokenType.NCHAR,
 709        "VARCHAR": TokenType.VARCHAR,
 710        "VARCHAR2": TokenType.VARCHAR,
 711        "NVARCHAR": TokenType.NVARCHAR,
 712        "NVARCHAR2": TokenType.NVARCHAR,
 713        "STR": TokenType.TEXT,
 714        "STRING": TokenType.TEXT,
 715        "TEXT": TokenType.TEXT,
 716        "CLOB": TokenType.TEXT,
 717        "LONGVARCHAR": TokenType.TEXT,
 718        "BINARY": TokenType.BINARY,
 719        "BLOB": TokenType.VARBINARY,
 720        "BYTEA": TokenType.VARBINARY,
 721        "VARBINARY": TokenType.VARBINARY,
 722        "TIME": TokenType.TIME,
 723        "TIMETZ": TokenType.TIMETZ,
 724        "TIMESTAMP": TokenType.TIMESTAMP,
 725        "TIMESTAMPTZ": TokenType.TIMESTAMPTZ,
 726        "TIMESTAMPLTZ": TokenType.TIMESTAMPLTZ,
 727        "DATE": TokenType.DATE,
 728        "DATETIME": TokenType.DATETIME,
 729        "INT4RANGE": TokenType.INT4RANGE,
 730        "INT4MULTIRANGE": TokenType.INT4MULTIRANGE,
 731        "INT8RANGE": TokenType.INT8RANGE,
 732        "INT8MULTIRANGE": TokenType.INT8MULTIRANGE,
 733        "NUMRANGE": TokenType.NUMRANGE,
 734        "NUMMULTIRANGE": TokenType.NUMMULTIRANGE,
 735        "TSRANGE": TokenType.TSRANGE,
 736        "TSMULTIRANGE": TokenType.TSMULTIRANGE,
 737        "TSTZRANGE": TokenType.TSTZRANGE,
 738        "TSTZMULTIRANGE": TokenType.TSTZMULTIRANGE,
 739        "DATERANGE": TokenType.DATERANGE,
 740        "DATEMULTIRANGE": TokenType.DATEMULTIRANGE,
 741        "UNIQUE": TokenType.UNIQUE,
 742        "STRUCT": TokenType.STRUCT,
 743        "VARIANT": TokenType.VARIANT,
 744        "ALTER": TokenType.ALTER,
 745        "ANALYZE": TokenType.COMMAND,
 746        "CALL": TokenType.COMMAND,
 747        "COMMENT": TokenType.COMMENT,
 748        "COPY": TokenType.COMMAND,
 749        "EXPLAIN": TokenType.COMMAND,
 750        "GRANT": TokenType.COMMAND,
 751        "OPTIMIZE": TokenType.COMMAND,
 752        "PREPARE": TokenType.COMMAND,
 753        "TRUNCATE": TokenType.COMMAND,
 754        "VACUUM": TokenType.COMMAND,
 755        "USER-DEFINED": TokenType.USERDEFINED,
 756        "FOR VERSION": TokenType.VERSION_SNAPSHOT,
 757        "FOR TIMESTAMP": TokenType.TIMESTAMP_SNAPSHOT,
 758    }
 759
 760    WHITE_SPACE: t.Dict[t.Optional[str], TokenType] = {
 761        " ": TokenType.SPACE,
 762        "\t": TokenType.SPACE,
 763        "\n": TokenType.BREAK,
 764        "\r": TokenType.BREAK,
 765        "\r\n": TokenType.BREAK,
 766    }
 767
 768    COMMANDS = {
 769        TokenType.COMMAND,
 770        TokenType.EXECUTE,
 771        TokenType.FETCH,
 772        TokenType.SHOW,
 773    }
 774
 775    COMMAND_PREFIX_TOKENS = {TokenType.SEMICOLON, TokenType.BEGIN}
 776
 777    # handle numeric literals like in hive (3L = BIGINT)
 778    NUMERIC_LITERALS: t.Dict[str, str] = {}
 779    ENCODE: t.Optional[str] = None
 780
 781    COMMENTS = ["--", ("/*", "*/")]
 782
 783    __slots__ = (
 784        "sql",
 785        "size",
 786        "tokens",
 787        "_start",
 788        "_current",
 789        "_line",
 790        "_col",
 791        "_comments",
 792        "_char",
 793        "_end",
 794        "_peek",
 795        "_prev_token_line",
 796    )
 797
 798    def __init__(self) -> None:
 799        self.reset()
 800
 801    def reset(self) -> None:
 802        self.sql = ""
 803        self.size = 0
 804        self.tokens: t.List[Token] = []
 805        self._start = 0
 806        self._current = 0
 807        self._line = 1
 808        self._col = 0
 809        self._comments: t.List[str] = []
 810
 811        self._char = ""
 812        self._end = False
 813        self._peek = ""
 814        self._prev_token_line = -1
 815
 816    def tokenize(self, sql: str) -> t.List[Token]:
 817        """Returns a list of tokens corresponding to the SQL string `sql`."""
 818        self.reset()
 819        self.sql = sql
 820        self.size = len(sql)
 821
 822        try:
 823            self._scan()
 824        except Exception as e:
 825            start = max(self._current - 50, 0)
 826            end = min(self._current + 50, self.size - 1)
 827            context = self.sql[start:end]
 828            raise TokenError(f"Error tokenizing '{context}'") from e
 829
 830        return self.tokens
 831
 832    def _scan(self, until: t.Optional[t.Callable] = None) -> None:
 833        while self.size and not self._end:
 834            self._start = self._current
 835            self._advance()
 836
 837            if self._char is None:
 838                break
 839
 840            if self._char not in self.WHITE_SPACE:
 841                if self._char.isdigit():
 842                    self._scan_number()
 843                elif self._char in self._IDENTIFIERS:
 844                    self._scan_identifier(self._IDENTIFIERS[self._char])
 845                else:
 846                    self._scan_keywords()
 847
 848            if until and until():
 849                break
 850
 851        if self.tokens and self._comments:
 852            self.tokens[-1].comments.extend(self._comments)
 853
 854    def _chars(self, size: int) -> str:
 855        if size == 1:
 856            return self._char
 857
 858        start = self._current - 1
 859        end = start + size
 860
 861        return self.sql[start:end] if end <= self.size else ""
 862
 863    def _advance(self, i: int = 1, alnum: bool = False) -> None:
 864        if self.WHITE_SPACE.get(self._char) is TokenType.BREAK:
 865            self._col = 1
 866            self._line += 1
 867        else:
 868            self._col += i
 869
 870        self._current += i
 871        self._end = self._current >= self.size
 872        self._char = self.sql[self._current - 1]
 873        self._peek = "" if self._end else self.sql[self._current]
 874
 875        if alnum and self._char.isalnum():
 876            # Here we use local variables instead of attributes for better performance
 877            _col = self._col
 878            _current = self._current
 879            _end = self._end
 880            _peek = self._peek
 881
 882            while _peek.isalnum():
 883                _col += 1
 884                _current += 1
 885                _end = _current >= self.size
 886                _peek = "" if _end else self.sql[_current]
 887
 888            self._col = _col
 889            self._current = _current
 890            self._end = _end
 891            self._peek = _peek
 892            self._char = self.sql[_current - 1]
 893
 894    @property
 895    def _text(self) -> str:
 896        return self.sql[self._start : self._current]
 897
 898    def peek(self, i: int = 0) -> str:
 899        i = self._current + i
 900        if i < self.size:
 901            return self.sql[i]
 902        return ""
 903
 904    def _add(self, token_type: TokenType, text: t.Optional[str] = None) -> None:
 905        self._prev_token_line = self._line
 906
 907        if self._comments and token_type == TokenType.SEMICOLON and self.tokens:
 908            self.tokens[-1].comments.extend(self._comments)
 909            self._comments = []
 910
 911        self.tokens.append(
 912            Token(
 913                token_type,
 914                text=self._text if text is None else text,
 915                line=self._line,
 916                col=self._col,
 917                start=self._start,
 918                end=self._current - 1,
 919                comments=self._comments,
 920            )
 921        )
 922        self._comments = []
 923
 924        # If we have either a semicolon or a begin token before the command's token, we'll parse
 925        # whatever follows the command's token as a string
 926        if (
 927            token_type in self.COMMANDS
 928            and self._peek != ";"
 929            and (len(self.tokens) == 1 or self.tokens[-2].token_type in self.COMMAND_PREFIX_TOKENS)
 930        ):
 931            start = self._current
 932            tokens = len(self.tokens)
 933            self._scan(lambda: self._peek == ";")
 934            self.tokens = self.tokens[:tokens]
 935            text = self.sql[start : self._current].strip()
 936            if text:
 937                self._add(TokenType.STRING, text)
 938
 939    def _scan_keywords(self) -> None:
 940        size = 0
 941        word = None
 942        chars = self._text
 943        char = chars
 944        prev_space = False
 945        skip = False
 946        trie = self._KEYWORD_TRIE
 947        single_token = char in self.SINGLE_TOKENS
 948
 949        while chars:
 950            if skip:
 951                result = TrieResult.PREFIX
 952            else:
 953                result, trie = in_trie(trie, char.upper())
 954
 955            if result == TrieResult.FAILED:
 956                break
 957            if result == TrieResult.EXISTS:
 958                word = chars
 959
 960            end = self._current + size
 961            size += 1
 962
 963            if end < self.size:
 964                char = self.sql[end]
 965                single_token = single_token or char in self.SINGLE_TOKENS
 966                is_space = char in self.WHITE_SPACE
 967
 968                if not is_space or not prev_space:
 969                    if is_space:
 970                        char = " "
 971                    chars += char
 972                    prev_space = is_space
 973                    skip = False
 974                else:
 975                    skip = True
 976            else:
 977                char = ""
 978                chars = " "
 979
 980        if word:
 981            if self._scan_string(word):
 982                return
 983            if self._scan_comment(word):
 984                return
 985            if prev_space or single_token or not char:
 986                self._advance(size - 1)
 987                word = word.upper()
 988                self._add(self.KEYWORDS[word], text=word)
 989                return
 990        if self._char in self.SINGLE_TOKENS:
 991            self._add(self.SINGLE_TOKENS[self._char], text=self._char)
 992            return
 993        self._scan_var()
 994
 995    def _scan_comment(self, comment_start: str) -> bool:
 996        if comment_start not in self._COMMENTS:
 997            return False
 998
 999        comment_start_line = self._line
1000        comment_start_size = len(comment_start)
1001        comment_end = self._COMMENTS[comment_start]
1002
1003        if comment_end:
1004            # Skip the comment's start delimiter
1005            self._advance(comment_start_size)
1006
1007            comment_end_size = len(comment_end)
1008            while not self._end and self._chars(comment_end_size) != comment_end:
1009                self._advance(alnum=True)
1010
1011            self._comments.append(self._text[comment_start_size : -comment_end_size + 1])
1012            self._advance(comment_end_size - 1)
1013        else:
1014            while not self._end and not self.WHITE_SPACE.get(self._peek) is TokenType.BREAK:
1015                self._advance(alnum=True)
1016            self._comments.append(self._text[comment_start_size:])
1017
1018        # Leading comment is attached to the succeeding token, whilst trailing comment to the preceding.
1019        # Multiple consecutive comments are preserved by appending them to the current comments list.
1020        if comment_start_line == self._prev_token_line:
1021            self.tokens[-1].comments.extend(self._comments)
1022            self._comments = []
1023            self._prev_token_line = self._line
1024
1025        return True
1026
1027    def _scan_number(self) -> None:
1028        if self._char == "0":
1029            peek = self._peek.upper()
1030            if peek == "B":
1031                return self._scan_bits() if self.BIT_STRINGS else self._add(TokenType.NUMBER)
1032            elif peek == "X":
1033                return self._scan_hex() if self.HEX_STRINGS else self._add(TokenType.NUMBER)
1034
1035        decimal = False
1036        scientific = 0
1037
1038        while True:
1039            if self._peek.isdigit():
1040                self._advance()
1041            elif self._peek == "." and not decimal:
1042                after = self.peek(1)
1043                if after.isdigit() or not after.isalpha():
1044                    decimal = True
1045                    self._advance()
1046                else:
1047                    return self._add(TokenType.VAR)
1048            elif self._peek in ("-", "+") and scientific == 1:
1049                scientific += 1
1050                self._advance()
1051            elif self._peek.upper() == "E" and not scientific:
1052                scientific += 1
1053                self._advance()
1054            elif self._peek.isidentifier():
1055                number_text = self._text
1056                literal = ""
1057
1058                while self._peek.strip() and self._peek not in self.SINGLE_TOKENS:
1059                    literal += self._peek.upper()
1060                    self._advance()
1061
1062                token_type = self.KEYWORDS.get(self.NUMERIC_LITERALS.get(literal, ""))
1063
1064                if token_type:
1065                    self._add(TokenType.NUMBER, number_text)
1066                    self._add(TokenType.DCOLON, "::")
1067                    return self._add(token_type, literal)
1068                elif self.IDENTIFIERS_CAN_START_WITH_DIGIT:
1069                    return self._add(TokenType.VAR)
1070
1071                self._advance(-len(literal))
1072                return self._add(TokenType.NUMBER, number_text)
1073            else:
1074                return self._add(TokenType.NUMBER)
1075
1076    def _scan_bits(self) -> None:
1077        self._advance()
1078        value = self._extract_value()
1079        try:
1080            # If `value` can't be converted to a binary, fallback to tokenizing it as an identifier
1081            int(value, 2)
1082            self._add(TokenType.BIT_STRING, value[2:])  # Drop the 0b
1083        except ValueError:
1084            self._add(TokenType.IDENTIFIER)
1085
1086    def _scan_hex(self) -> None:
1087        self._advance()
1088        value = self._extract_value()
1089        try:
1090            # If `value` can't be converted to a hex, fallback to tokenizing it as an identifier
1091            int(value, 16)
1092            self._add(TokenType.HEX_STRING, value[2:])  # Drop the 0x
1093        except ValueError:
1094            self._add(TokenType.IDENTIFIER)
1095
1096    def _extract_value(self) -> str:
1097        while True:
1098            char = self._peek.strip()
1099            if char and char not in self.SINGLE_TOKENS:
1100                self._advance(alnum=True)
1101            else:
1102                break
1103
1104        return self._text
1105
1106    def _scan_string(self, start: str) -> bool:
1107        base = None
1108        token_type = TokenType.STRING
1109
1110        if start in self._QUOTES:
1111            end = self._QUOTES[start]
1112        elif start in self._FORMAT_STRINGS:
1113            end, token_type = self._FORMAT_STRINGS[start]
1114
1115            if token_type == TokenType.HEX_STRING:
1116                base = 16
1117            elif token_type == TokenType.BIT_STRING:
1118                base = 2
1119        else:
1120            return False
1121
1122        self._advance(len(start))
1123        text = self._extract_string(end)
1124
1125        if base:
1126            try:
1127                int(text, base)
1128            except:
1129                raise TokenError(
1130                    f"Numeric string contains invalid characters from {self._line}:{self._start}"
1131                )
1132        else:
1133            text = text.encode(self.ENCODE).decode(self.ENCODE) if self.ENCODE else text
1134
1135        self._add(token_type, text)
1136        return True
1137
1138    def _scan_identifier(self, identifier_end: str) -> None:
1139        self._advance()
1140        text = self._extract_string(identifier_end, self._IDENTIFIER_ESCAPES)
1141        self._add(TokenType.IDENTIFIER, text)
1142
1143    def _scan_var(self) -> None:
1144        while True:
1145            char = self._peek.strip()
1146            if char and (char in self.VAR_SINGLE_TOKENS or char not in self.SINGLE_TOKENS):
1147                self._advance(alnum=True)
1148            else:
1149                break
1150
1151        self._add(
1152            TokenType.VAR
1153            if self.tokens and self.tokens[-1].token_type == TokenType.PARAMETER
1154            else self.KEYWORDS.get(self._text.upper(), TokenType.VAR)
1155        )
1156
1157    def _extract_string(self, delimiter: str, escapes=None) -> str:
1158        text = ""
1159        delim_size = len(delimiter)
1160        escapes = self._STRING_ESCAPES if escapes is None else escapes
1161
1162        while True:
1163            if self._char in escapes and (self._peek == delimiter or self._peek in escapes):
1164                if self._peek == delimiter:
1165                    text += self._peek
1166                else:
1167                    text += self._char + self._peek
1168
1169                if self._current + 1 < self.size:
1170                    self._advance(2)
1171                else:
1172                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._current}")
1173            else:
1174                if self._chars(delim_size) == delimiter:
1175                    if delim_size > 1:
1176                        self._advance(delim_size - 1)
1177                    break
1178
1179                if self._end:
1180                    raise TokenError(f"Missing {delimiter} from {self._line}:{self._start}")
1181
1182                current = self._current - 1
1183                self._advance(alnum=True)
1184                text += self.sql[current : self._current - 1]
1185
1186        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]]] = []
IDENTIFIERS: List[Union[str, Tuple[str, str]]] = ['"']
IDENTIFIER_ESCAPES = ['"']
QUOTES: List[Union[str, Tuple[str, str]]] = ["'"]
STRING_ESCAPES = ["'"]
VAR_SINGLE_TOKENS: Set[str] = set()
IDENTIFIERS_CAN_START_WITH_DIGIT: bool = False
KEYWORDS: Dict[str, sqlglot.tokens.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.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'>, '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'>, 'TINYINT': <TokenType.TINYINT: 'TINYINT'>, 'SHORT': <TokenType.SMALLINT: 'SMALLINT'>, 'SMALLINT': <TokenType.SMALLINT: 'SMALLINT'>, 'INT128': <TokenType.INT128: 'INT128'>, 'INT2': <TokenType.SMALLINT: 'SMALLINT'>, 'INTEGER': <TokenType.INT: 'INT'>, 'INT': <TokenType.INT: 'INT'>, 'INT4': <TokenType.INT: 'INT'>, 'LONG': <TokenType.BIGINT: 'BIGINT'>, 'BIGINT': <TokenType.BIGINT: 'BIGINT'>, 'INT8': <TokenType.BIGINT: 'BIGINT'>, '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'>, 'CLOB': <TokenType.TEXT: 'TEXT'>, 'LONGVARCHAR': <TokenType.TEXT: 'TEXT'>, 'BINARY': <TokenType.BINARY: 'BINARY'>, 'BLOB': <TokenType.VARBINARY: 'VARBINARY'>, '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], sqlglot.tokens.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:
801    def reset(self) -> None:
802        self.sql = ""
803        self.size = 0
804        self.tokens: t.List[Token] = []
805        self._start = 0
806        self._current = 0
807        self._line = 1
808        self._col = 0
809        self._comments: t.List[str] = []
810
811        self._char = ""
812        self._end = False
813        self._peek = ""
814        self._prev_token_line = -1
def tokenize(self, sql: str) -> List[sqlglot.tokens.Token]:
816    def tokenize(self, sql: str) -> t.List[Token]:
817        """Returns a list of tokens corresponding to the SQL string `sql`."""
818        self.reset()
819        self.sql = sql
820        self.size = len(sql)
821
822        try:
823            self._scan()
824        except Exception as e:
825            start = max(self._current - 50, 0)
826            end = min(self._current + 50, self.size - 1)
827            context = self.sql[start:end]
828            raise TokenError(f"Error tokenizing '{context}'") from e
829
830        return self.tokens

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

def peek(self, i: int = 0) -> str:
898    def peek(self, i: int = 0) -> str:
899        i = self._current + i
900        if i < self.size:
901            return self.sql[i]
902        return ""
size
sql
tokens