parser

package
Version: v0.0.0-...-f0ea040 Latest Latest
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Published: Oct 29, 2015 License: Apache-2.0 Imports: 24 Imported by: 0

Documentation

Index

Constants

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const ACTION = 57358
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const ADD = 57359
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const ALL = 57360
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const ALTER = 57361
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const ANALYSE = 57362
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const ANALYZE = 57363
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const AND = 57364
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const ANY = 57365
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const ARRAY = 57366
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const AS = 57367
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const ASC = 57368
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const ASYMMETRIC = 57369
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const AT = 57370
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const BCONST = 57349
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const BEGIN = 57371
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const BETWEEN = 57372
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const BIGINT = 57373
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const BIT = 57374
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const BLOB = 57375
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const BOOL = 57376
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const BOOLEAN = 57377
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const BOTH = 57378
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const BY = 57379
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const BYTES = 57380
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const CASCADE = 57381
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const CASE = 57382
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const CAST = 57383
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const CHAR = 57384
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const CHARACTER = 57385
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const CHECK = 57386
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const COALESCE = 57387
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const COLLATE = 57388
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const COLLATION = 57389
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const COLUMN = 57390
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const COLUMNS = 57391
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const COMMIT = 57392
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const COMMITTED = 57393
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const CONCAT = 57394
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const CONFLICT = 57395
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const CONSTRAINT = 57396
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const COVERING = 57397
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const CREATE = 57398
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const CROSS = 57399
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const CUBE = 57400
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const CURRENT = 57401
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const CURRENT_CATALOG = 57402
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const CURRENT_DATE = 57403
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const CURRENT_ROLE = 57404
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const CURRENT_TIME = 57405
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const CURRENT_TIMESTAMP = 57406
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const CURRENT_USER = 57407
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const CYCLE = 57408
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const DATA = 57409
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const DATABASE = 57410
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const DATABASES = 57411
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const DATE = 57412
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const DAY = 57413
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const DEC = 57414
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const DECIMAL = 57415
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const DEFAULT = 57416
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const DEFERRABLE = 57417
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const DELETE = 57418
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const DESC = 57419
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const DISTINCT = 57420
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const DO = 57421
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const DOT_DOT = 57353
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const DOUBLE = 57422
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const DROP = 57423
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const ELSE = 57424
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const END = 57425
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const ERROR = 57357
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const ESCAPE = 57426
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const EXCEPT = 57427
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const EXISTS = 57428
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const EXPLAIN = 57429
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const EXTRACT = 57430
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const FALSE = 57431
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const FCONST = 57347
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const FETCH = 57432
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const FILTER = 57433
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const FIRST = 57434
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const FLOAT = 57435
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const FOLLOWING = 57436
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const FOR = 57437
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const FOREIGN = 57438
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const FROM = 57439
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const FULL = 57440
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const GRANT = 57441
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const GRANTS = 57442
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const GREATER_EQUALS = 57355
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const GREATEST = 57443
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const GROUP = 57444
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const GROUPING = 57445
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const HAVING = 57446
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const HOUR = 57447
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const ICONST = 57350
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const IDENT = 57346
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const IF = 57448
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const IFNULL = 57449
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const IN = 57450
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const INDEX = 57451
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const INITIALLY = 57452
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const INNER = 57453
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const INSERT = 57454
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const INT = 57455
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const INT64 = 57456
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const INTEGER = 57457
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const INTERSECT = 57458
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const INTERVAL = 57459
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const INTO = 57460
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const IS = 57461
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const ISOLATION = 57462
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const JOIN = 57463
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const KEY = 57464
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const LATERAL = 57465
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const LEADING = 57466
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const LEAST = 57467
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const LEFT = 57468
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const LESS_EQUALS = 57354
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const LEVEL = 57469
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const LIKE = 57470
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const LIMIT = 57471
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const LOCAL = 57472
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const LOCALTIME = 57473
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const LOCALTIMESTAMP = 57474
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const LSHIFT = 57475
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const MATCH = 57476
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const MINUTE = 57477
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const MONTH = 57478
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const NAME = 57479
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const NAMES = 57480
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const NATURAL = 57481
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const NEXT = 57482
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const NO = 57483
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const NOT = 57484
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const NOTHING = 57485
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const NOT_EQUALS = 57356
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const NOT_LA = 57583
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const NULL = 57486
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const NULLIF = 57487
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const NULLS = 57488
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const NUMERIC = 57489
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const OF = 57490
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const OFF = 57491
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const OFFSET = 57492
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const ON = 57493
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const ONLY = 57494
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const OR = 57495
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const ORDER = 57496
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const ORDINALITY = 57497
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const OUT = 57498
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const OUTER = 57499
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const OVER = 57500
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const OVERLAPS = 57501
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const OVERLAY = 57502
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const PARAM = 57351
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const PARTIAL = 57503
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const PARTITION = 57504
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const PLACING = 57505
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const POSITION = 57506
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const POSTFIXOP = 57585
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const PRECEDING = 57507
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const PRECISION = 57508
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const PRIMARY = 57509
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const RANGE = 57510
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const READ = 57511
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const REAL = 57512
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const RECURSIVE = 57513
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const REF = 57514
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const REFERENCES = 57515
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const RENAME = 57516
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const REPEATABLE = 57517
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const RESTRICT = 57518
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const RETURNING = 57519
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const REVOKE = 57520
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const RIGHT = 57521
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const ROLLBACK = 57522
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const ROLLUP = 57523
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const ROW = 57524
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const ROWS = 57525
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const RSHIFT = 57526
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const SCONST = 57348
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const SEARCH = 57527
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const SECOND = 57528
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const SELECT = 57529
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const SERIALIZABLE = 57530
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const SESSION = 57531
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const SESSION_USER = 57532
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const SET = 57533
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const SHOW = 57534
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const SIMILAR = 57535
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const SIMPLE = 57536
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const SMALLINT = 57537
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const SNAPSHOT = 57538
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const SOME = 57539
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const SQL = 57540
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const STORING = 57543
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const STRICT = 57541
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const STRING = 57542
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const SUBSTRING = 57544
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const SYMMETRIC = 57545
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const TABLE = 57546
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const TABLES = 57547
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const TEXT = 57548
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const THEN = 57549
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const TIME = 57550
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const TIMESTAMP = 57551
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const TO = 57552
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const TRAILING = 57553
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const TRANSACTION = 57554
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const TREAT = 57555
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const TRIM = 57556
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const TRUE = 57557
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const TRUNCATE = 57558
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const TYPE = 57559
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const TYPECAST = 57352
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const (
	TimestampWithOffsetZoneFormat = "2006-01-02 15:04:05.999999999-07:00"
)

time.Time formats.

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const UMINUS = 57586
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const UNBOUNDED = 57560
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const UNCOMMITTED = 57561
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const UNION = 57562
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const UNIQUE = 57563
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const UNKNOWN = 57564
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const UPDATE = 57565
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const USER = 57566
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const USING = 57567
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const VALID = 57568
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const VALIDATE = 57569
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const VALUE = 57570
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const VALUES = 57571
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const VARCHAR = 57572
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const VARIADIC = 57573
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const VARYING = 57574
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const WHEN = 57575
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const WHERE = 57576
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const WINDOW = 57577
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const WITH = 57578
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const WITHIN = 57579
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const WITHOUT = 57580
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const WITH_LA = 57584
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const YEAR = 57581
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const ZONE = 57582

Variables

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var (
	// DummyBool is a placeholder DBool value.
	DummyBool = DBool(false)
	// DummyInt is a placeholder DInt value.
	DummyInt = DInt(0)
	// DummyFloat is a placeholder DFloat value.
	DummyFloat = DFloat(0)
	// DummyString is a placeholder DString value.
	DummyString = DString("")
	// DummyBytes is a placeholder DBytes value.
	DummyBytes = DBytes("")
	// DummyDate is a placeholder DDate value.
	DummyDate = DDate(0)
	// DummyTimestamp is a placeholder DTimestamp value.
	DummyTimestamp = DTimestamp{}
	// DummyInterval is a placeholder DInterval value.
	DummyInterval = DInterval{}

	// DNull is the NULL Datum.
	DNull = dNull{}
)

Functions

func ContainsVars

func ContainsVars(expr Expr) bool

ContainsVars returns true if the expression contains any variables.

func FillArgs

func FillArgs(stmt Statement, args Args) error

FillArgs replaces any placeholder nodes in the expression with arguments supplied with the query.

func SimilarEscape

func SimilarEscape(pattern string) string

SimilarEscape converts a SQL:2008 regexp pattern to POSIX style, so it can be used by our regexp engine.

func WalkStmt

func WalkStmt(v Visitor, stmt Statement)

WalkStmt walks the entire parsed stmt calling WalkExpr on each expression, and replacing each expression with the one returned by WalkExpr.

Types

type AliasedTableExpr

type AliasedTableExpr struct {
	Expr SimpleTableExpr
	As   Name
}

AliasedTableExpr represents a table expression coupled with an optional alias.

func (*AliasedTableExpr) String

func (node *AliasedTableExpr) String() string

type AlterTable

type AlterTable struct {
	IfExists bool
	Table    *QualifiedName
	Cmds     AlterTableCmds
}

AlterTable represents an ALTER TABLE statement.

func (*AlterTable) StatementType

func (*AlterTable) StatementType() StatementType

StatementType implements the Statement interface.

func (*AlterTable) String

func (node *AlterTable) String() string

type AlterTableAddColumn

type AlterTableAddColumn struct {
	IfNotExists bool
	ColumnDef   *ColumnTableDef
	// contains filtered or unexported fields
}

AlterTableAddColumn represents an ADD COLUMN command.

func (*AlterTableAddColumn) String

func (node *AlterTableAddColumn) String() string

type AlterTableAddConstraint

type AlterTableAddConstraint struct {
	ConstraintDef ConstraintTableDef
}

AlterTableAddConstraint represents an ADD CONSTRAINT command.

func (*AlterTableAddConstraint) String

func (node *AlterTableAddConstraint) String() string

type AlterTableCmd

type AlterTableCmd interface {
	// contains filtered or unexported methods
}

AlterTableCmd represents a table modification operation.

type AlterTableCmds

type AlterTableCmds []AlterTableCmd

AlterTableCmds represents a list of table alterations.

func (AlterTableCmds) String

func (node AlterTableCmds) String() string

type AlterTableDropColumn

type AlterTableDropColumn struct {
	IfExists bool
	Column   string
	// contains filtered or unexported fields
}

AlterTableDropColumn represents a DROP COLUMN command.

func (*AlterTableDropColumn) String

func (node *AlterTableDropColumn) String() string

type AlterTableDropConstraint

type AlterTableDropConstraint struct {
	IfExists   bool
	Constraint string
}

AlterTableDropConstraint represents a DROP CONSTRAINT command.

func (*AlterTableDropConstraint) String

func (node *AlterTableDropConstraint) String() string

type AndExpr

type AndExpr struct {
	Left, Right Expr
}

AndExpr represents an AND expression.

func (*AndExpr) Eval

func (expr *AndExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*AndExpr) String

func (node *AndExpr) String() string

func (*AndExpr) TypeCheck

func (expr *AndExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*AndExpr) Walk

func (expr *AndExpr) Walk(v Visitor)

Walk implements the Expr interface.

type Args

type Args interface {
	Arg(name string) (Datum, bool)
}

Args defines the interface for retrieving arguments. Return false for the second return value if the argument cannot be found.

type Array

type Array Exprs

Array represents an array constructor.

func (Array) Eval

func (t Array) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (Array) String

func (node Array) String() string

func (Array) TypeCheck

func (expr Array) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (Array) Walk

func (expr Array) Walk(v Visitor)

Walk implements the Expr interface.

type ArrayIndirection

type ArrayIndirection struct {
	Begin Expr
	End   Expr
}

ArrayIndirection represents "[<begin>:<end>]" in an indirection expression.

func (*ArrayIndirection) String

func (a *ArrayIndirection) String() string

type BeginTransaction

type BeginTransaction struct {
	Isolation IsolationLevel
}

BeginTransaction represents a BEGIN statement

func (*BeginTransaction) StatementType

func (*BeginTransaction) StatementType() StatementType

StatementType implements the Statement interface.

func (*BeginTransaction) String

func (node *BeginTransaction) String() string

type BinaryExpr

type BinaryExpr struct {
	Operator    BinaryOp
	Left, Right Expr
	// contains filtered or unexported fields
}

BinaryExpr represents a binary value expression.

func (*BinaryExpr) Eval

func (expr *BinaryExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*BinaryExpr) String

func (node *BinaryExpr) String() string

func (*BinaryExpr) TypeCheck

func (expr *BinaryExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*BinaryExpr) Walk

func (expr *BinaryExpr) Walk(v Visitor)

Walk implements the Expr interface.

type BinaryOp

type BinaryOp int

BinaryOp represents a binary operator.

const (
	Bitand BinaryOp = iota
	Bitor
	Bitxor
	Plus
	Minus
	Mult
	Div
	Mod
	Concat
	LShift
	RShift
)

BinaryExpr.Operator

func (BinaryOp) String

func (i BinaryOp) String() string

type BoolType

type BoolType struct {
	Name string
}

BoolType represents a BOOLEAN type.

func (*BoolType) String

func (node *BoolType) String() string

type BytesType

type BytesType struct {
	Name string
}

BytesType represents a BYTES or BLOB type.

func (*BytesType) String

func (node *BytesType) String() string

type CaseExpr

type CaseExpr struct {
	Expr  Expr
	Whens []*When
	Else  Expr
}

CaseExpr represents a CASE expression.

func (*CaseExpr) Eval

func (expr *CaseExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*CaseExpr) String

func (node *CaseExpr) String() string

func (*CaseExpr) TypeCheck

func (expr *CaseExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*CaseExpr) Walk

func (expr *CaseExpr) Walk(v Visitor)

Walk implements the Expr interface.

type CastExpr

type CastExpr struct {
	Expr Expr
	Type ColumnType
}

CastExpr represents a CAST(expr AS type) expression.

func (*CastExpr) Eval

func (expr *CastExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*CastExpr) String

func (n *CastExpr) String() string

func (*CastExpr) TypeCheck

func (expr *CastExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*CastExpr) Walk

func (expr *CastExpr) Walk(v Visitor)

Walk implements the Expr interface.

type CoalesceExpr

type CoalesceExpr struct {
	Name  string
	Exprs Exprs
}

CoalesceExpr represents a COALESCE or IFNULL expression.

func (*CoalesceExpr) Eval

func (expr *CoalesceExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*CoalesceExpr) String

func (node *CoalesceExpr) String() string

func (*CoalesceExpr) TypeCheck

func (expr *CoalesceExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*CoalesceExpr) Walk

func (expr *CoalesceExpr) Walk(v Visitor)

Walk implements the Expr interface.

type ColumnDefault

type ColumnDefault struct {
	Expr Expr
}

ColumnDefault represents a DEFAULT clause for a column.

type ColumnQualification

type ColumnQualification interface {
	// contains filtered or unexported methods
}

ColumnQualification represents a constraint on a column.

type ColumnTableDef

type ColumnTableDef struct {
	Name        Name
	Type        ColumnType
	Nullable    Nullability
	PrimaryKey  bool
	Unique      bool
	DefaultExpr Expr
}

ColumnTableDef represents a column definition within a CREATE TABLE statement.

func (*ColumnTableDef) String

func (node *ColumnTableDef) String() string

type ColumnType

type ColumnType interface {
	fmt.Stringer
	// contains filtered or unexported methods
}

ColumnType represents a type in a column definition.

type CommitTransaction

type CommitTransaction struct{}

CommitTransaction represents a COMMIT statement.

func (*CommitTransaction) StatementType

func (*CommitTransaction) StatementType() StatementType

StatementType implements the Statement interface.

func (*CommitTransaction) String

func (node *CommitTransaction) String() string

type ComparisonExpr

type ComparisonExpr struct {
	Operator    ComparisonOp
	Left, Right Expr
	// contains filtered or unexported fields
}

ComparisonExpr represents a two-value comparison expression.

func (*ComparisonExpr) Eval

func (expr *ComparisonExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*ComparisonExpr) String

func (node *ComparisonExpr) String() string

func (*ComparisonExpr) TypeCheck

func (expr *ComparisonExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*ComparisonExpr) Walk

func (expr *ComparisonExpr) Walk(v Visitor)

Walk implements the Expr interface.

type ComparisonOp

type ComparisonOp int

ComparisonOp represents a binary operator.

const (
	EQ ComparisonOp = iota
	LT
	GT
	LE
	GE
	NE
	In
	NotIn
	Like
	NotLike
	SimilarTo
	NotSimilarTo
	IsDistinctFrom
	IsNotDistinctFrom
	Is
	IsNot
)

ComparisonExpr.Operator

func (ComparisonOp) String

func (i ComparisonOp) String() string

type ConstraintTableDef

type ConstraintTableDef interface {
	TableDef
	// contains filtered or unexported methods
}

ConstraintTableDef represents a constraint definition within a CREATE TABLE statement.

type CreateDatabase

type CreateDatabase struct {
	IfNotExists bool
	Name        Name
}

CreateDatabase represents a CREATE DATABASE statement.

func (*CreateDatabase) StatementType

func (*CreateDatabase) StatementType() StatementType

StatementType implements the Statement interface.

func (*CreateDatabase) String

func (node *CreateDatabase) String() string

type CreateIndex

type CreateIndex struct {
	Name        Name
	Table       *QualifiedName
	Unique      bool
	IfNotExists bool
	Columns     NameList
	Storing     NameList
}

CreateIndex represents a CREATE INDEX statement.

func (*CreateIndex) StatementType

func (*CreateIndex) StatementType() StatementType

StatementType implements the Statement interface.

func (*CreateIndex) String

func (node *CreateIndex) String() string

type CreateTable

type CreateTable struct {
	IfNotExists bool
	Table       *QualifiedName
	Defs        TableDefs
}

CreateTable represents a CREATE TABLE statement.

func (*CreateTable) StatementType

func (*CreateTable) StatementType() StatementType

StatementType implements the Statement interface.

func (*CreateTable) String

func (node *CreateTable) String() string

type DBool

type DBool bool

DBool is the boolean Datum.

func (DBool) Compare

func (d DBool) Compare(other Datum) int

Compare implements the Datum interface.

func (DBool) Eval

func (t DBool) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DBool) IsMax

func (d DBool) IsMax() bool

IsMax implements the Datum interface.

func (DBool) IsMin

func (d DBool) IsMin() bool

IsMin implements the Datum interface.

func (DBool) Next

func (d DBool) Next() Datum

Next implements the Datum interface.

func (DBool) String

func (d DBool) String() string

func (DBool) Type

func (d DBool) Type() string

Type implements the Datum interface.

func (DBool) TypeCheck

func (expr DBool) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DBool) Walk

func (DBool) Walk(_ Visitor)

Walk implements the Expr interface.

type DBytes

type DBytes string

DBytes is the bytes Datum. The underlying type is a string because we want the immutability, but this may contain arbitrary bytes.

func (DBytes) Compare

func (d DBytes) Compare(other Datum) int

Compare implements the Datum interface.

func (DBytes) Eval

func (t DBytes) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DBytes) IsMax

func (d DBytes) IsMax() bool

IsMax implements the Datum interface.

func (DBytes) IsMin

func (d DBytes) IsMin() bool

IsMin implements the Datum interface.

func (DBytes) Next

func (d DBytes) Next() Datum

Next implements the Datum interface.

func (DBytes) String

func (d DBytes) String() string

func (DBytes) Type

func (d DBytes) Type() string

Type implements the Datum interface.

func (DBytes) TypeCheck

func (expr DBytes) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DBytes) Walk

func (DBytes) Walk(_ Visitor)

Walk implements the Expr interface.

type DDate

type DDate int64

DDate is the date Datum represented as the number of days after the Unix epoch.

func ParseDate

func ParseDate(s DString) (DDate, error)

ParseDate parses a date.

func (DDate) Compare

func (d DDate) Compare(other Datum) int

Compare implements the Datum interface.

func (DDate) Eval

func (t DDate) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DDate) IsMax

func (d DDate) IsMax() bool

IsMax implements the Datum interface.

func (DDate) IsMin

func (d DDate) IsMin() bool

IsMin implements the Datum interface.

func (DDate) Next

func (d DDate) Next() Datum

Next implements the Datum interface.

func (DDate) String

func (d DDate) String() string

func (DDate) Type

func (d DDate) Type() string

Type implements the Datum interface.

func (DDate) TypeCheck

func (expr DDate) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DDate) Walk

func (DDate) Walk(_ Visitor)

Walk implements the Expr interface.

type DFloat

type DFloat float64

DFloat is the float Datum.

func (DFloat) Compare

func (d DFloat) Compare(other Datum) int

Compare implements the Datum interface.

func (DFloat) Eval

func (t DFloat) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DFloat) IsMax

func (d DFloat) IsMax() bool

IsMax implements the Datum interface.

func (DFloat) IsMin

func (d DFloat) IsMin() bool

IsMin implements the Datum interface.

func (DFloat) Next

func (d DFloat) Next() Datum

Next implements the Datum interface.

func (DFloat) String

func (d DFloat) String() string

func (DFloat) Type

func (d DFloat) Type() string

Type implements the Datum interface.

func (DFloat) TypeCheck

func (expr DFloat) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DFloat) Walk

func (DFloat) Walk(_ Visitor)

Walk implements the Expr interface.

type DInt

type DInt int64

DInt is the int Datum.

func (DInt) Compare

func (d DInt) Compare(other Datum) int

Compare implements the Datum interface.

func (DInt) Eval

func (t DInt) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DInt) IsMax

func (d DInt) IsMax() bool

IsMax implements the Datum interface.

func (DInt) IsMin

func (d DInt) IsMin() bool

IsMin implements the Datum interface.

func (DInt) Next

func (d DInt) Next() Datum

Next implements the Datum interface.

func (DInt) String

func (d DInt) String() string

func (DInt) Type

func (d DInt) Type() string

Type implements the Datum interface.

func (DInt) TypeCheck

func (expr DInt) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DInt) Walk

func (DInt) Walk(_ Visitor)

Walk implements the Expr interface.

type DInterval

type DInterval struct {
	time.Duration
}

DInterval is the interval Datum.

func (DInterval) Compare

func (d DInterval) Compare(other Datum) int

Compare implements the Datum interface.

func (DInterval) Eval

func (t DInterval) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DInterval) IsMax

func (d DInterval) IsMax() bool

IsMax implements the Datum interface.

func (DInterval) IsMin

func (d DInterval) IsMin() bool

IsMin implements the Datum interface.

func (DInterval) Next

func (d DInterval) Next() Datum

Next implements the Datum interface.

func (DInterval) Type

func (d DInterval) Type() string

Type implements the Datum interface.

func (DInterval) TypeCheck

func (expr DInterval) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DInterval) Walk

func (DInterval) Walk(_ Visitor)

Walk implements the Expr interface.

type DString

type DString string

DString is the string Datum.

func (DString) Compare

func (d DString) Compare(other Datum) int

Compare implements the Datum interface.

func (DString) Eval

func (t DString) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DString) IsMax

func (d DString) IsMax() bool

IsMax implements the Datum interface.

func (DString) IsMin

func (d DString) IsMin() bool

IsMin implements the Datum interface.

func (DString) Next

func (d DString) Next() Datum

Next implements the Datum interface.

func (DString) String

func (d DString) String() string

func (DString) Type

func (d DString) Type() string

Type implements the Datum interface.

func (DString) TypeCheck

func (expr DString) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DString) Walk

func (DString) Walk(_ Visitor)

Walk implements the Expr interface.

type DTimestamp

type DTimestamp struct {
	time.Time
}

DTimestamp is the timestamp Datum.

func (DTimestamp) Compare

func (d DTimestamp) Compare(other Datum) int

Compare implements the Datum interface.

func (DTimestamp) Eval

func (t DTimestamp) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DTimestamp) IsMax

func (d DTimestamp) IsMax() bool

IsMax implements the Datum interface.

func (DTimestamp) IsMin

func (d DTimestamp) IsMin() bool

IsMin implements the Datum interface.

func (DTimestamp) Next

func (d DTimestamp) Next() Datum

Next implements the Datum interface.

func (DTimestamp) String

func (d DTimestamp) String() string

func (DTimestamp) Type

func (d DTimestamp) Type() string

Type implements the Datum interface.

func (DTimestamp) TypeCheck

func (expr DTimestamp) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DTimestamp) Walk

func (DTimestamp) Walk(_ Visitor)

Walk implements the Expr interface.

type DTuple

type DTuple []Datum

DTuple is the tuple Datum.

func (DTuple) Compare

func (d DTuple) Compare(other Datum) int

Compare implements the Datum interface.

func (DTuple) Eval

func (t DTuple) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DTuple) IsMax

func (d DTuple) IsMax() bool

IsMax implements the Datum interface.

func (DTuple) IsMin

func (d DTuple) IsMin() bool

IsMin implements the Datum interface.

func (DTuple) Len

func (d DTuple) Len() int

func (DTuple) Less

func (d DTuple) Less(i, j int) bool

func (DTuple) Next

func (d DTuple) Next() Datum

Next implements the Datum interface.

func (*DTuple) Normalize

func (d *DTuple) Normalize()

Normalize sorts and uniques the datum tuple.

func (DTuple) String

func (d DTuple) String() string

func (DTuple) Swap

func (d DTuple) Swap(i, j int)

func (DTuple) Type

func (d DTuple) Type() string

Type implements the Datum interface.

func (DTuple) TypeCheck

func (expr DTuple) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DTuple) Walk

func (DTuple) Walk(_ Visitor)

Walk implements the Expr interface.

type DateType

type DateType struct {
}

DateType represents a DATE type.

func (*DateType) String

func (node *DateType) String() string

type Datum

type Datum interface {
	Expr
	Type() string
	// Compare returns -1 if the receiver is less than other, 0 if receiver is
	// equal to other and +1 if receiver is greater than other.
	Compare(other Datum) int
	// Next returns the next datum. If the receiver is "a" and the returned datum
	// is "b", then "a < b" and no other datum will compare such that "a < c <
	// b".
	Next() Datum
	// IsMax returns true if the datum is equal to the maximum value the datum
	// type can hold.
	IsMax() bool
	// IsMin returns true if the datum is equal to the minimum value the datum
	// type can hold.
	IsMin() bool
}

A Datum holds either a bool, int64, float64, string or []Datum.

type DecimalType

type DecimalType struct {
	Name  string
	Prec  int
	Scale int
}

DecimalType represents a DECIMAL or NUMERIC type.

func (*DecimalType) String

func (node *DecimalType) String() string

type DefaultVal

type DefaultVal struct{}

DefaultVal represents the DEFAULT expression.

func (DefaultVal) Eval

func (t DefaultVal) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (DefaultVal) String

func (node DefaultVal) String() string

func (DefaultVal) TypeCheck

func (expr DefaultVal) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (DefaultVal) Walk

func (DefaultVal) Walk(_ Visitor)

Walk implements the Expr interface.

type Delete

type Delete struct {
	Table TableExpr
	Where *Where
}

Delete represents a DELETE statement.

func (*Delete) StatementType

func (*Delete) StatementType() StatementType

StatementType implements the Statement interface.

func (*Delete) String

func (node *Delete) String() string

type Direction

type Direction int

Direction for ordering results.

const (
	DefaultDirection Direction = iota
	Ascending
	Descending
)

Direction values.

func (Direction) String

func (d Direction) String() string

type DropDatabase

type DropDatabase struct {
	Name     Name
	IfExists bool
}

DropDatabase represents a DROP DATABASE statement.

func (*DropDatabase) StatementType

func (*DropDatabase) StatementType() StatementType

StatementType implements the Statement interface.

func (*DropDatabase) String

func (node *DropDatabase) String() string

type DropIndex

type DropIndex struct {
	Names    QualifiedNames
	IfExists bool
}

DropIndex represents a DROP DATABASE statement.

func (*DropIndex) StatementType

func (*DropIndex) StatementType() StatementType

StatementType implements the Statement interface.

func (*DropIndex) String

func (node *DropIndex) String() string

type DropTable

type DropTable struct {
	Names    QualifiedNames
	IfExists bool
}

DropTable represents a DROP TABLE statement.

func (*DropTable) StatementType

func (*DropTable) StatementType() StatementType

StatementType implements the Statement interface.

func (*DropTable) String

func (node *DropTable) String() string

type EvalContext

type EvalContext struct {
	NodeID        uint32
	StmtTimestamp DTimestamp
	TxnTimestamp  DTimestamp
	ReCache       *RegexpCache
	GetLocation   func() (*time.Location, error)
}

EvalContext defines the context in which to evaluate an expression, allowing the retrieval of state such as the node ID or statement start time.

func (EvalContext) NormalizeExpr

func (ctx EvalContext) NormalizeExpr(expr Expr) (Expr, error)

NormalizeExpr normalizes an expression, simplifying where possible, but guaranteeing that the result of evaluating the expression is unchanged. Example normalizations:

(a)                   -> a
ROW(a, b, c)          -> (a, b, c)
a = 1 + 1             -> a = 2
a + 1 = 2             -> a = 1
a BETWEEN b AND c     -> (a >= b) AND (a <= c)
a NOT BETWEEN b AND c -> (a < b) OR (a > c)

func (EvalContext) ParseTimestamp

func (ctx EvalContext) ParseTimestamp(s DString) (DTimestamp, error)

ParseTimestamp parses the timestamp.

func (EvalContext) TypeCheckAndNormalizeExpr

func (ctx EvalContext) TypeCheckAndNormalizeExpr(expr Expr) (Expr, error)

TypeCheckAndNormalizeExpr is a combination of TypeCheck() and ctx.NormalizeExpr(). It returns an error if either of TypeCheck() or ctx.NormalizeExpr() return one, and otherwise returns the Expr returned by ctx.NormalizeExpr().

type ExistsExpr

type ExistsExpr struct {
	Subquery *Subquery
}

ExistsExpr represents an EXISTS expression.

func (*ExistsExpr) Eval

func (t *ExistsExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*ExistsExpr) String

func (node *ExistsExpr) String() string

func (*ExistsExpr) TypeCheck

func (expr *ExistsExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*ExistsExpr) Walk

func (expr *ExistsExpr) Walk(v Visitor)

Walk implements the Expr interface.

type Explain

type Explain struct {
	Options   []string
	Statement Statement
}

Explain represents an EXPLAIN statement.

func (*Explain) StatementType

func (*Explain) StatementType() StatementType

StatementType implements the Statement interface.

func (*Explain) String

func (node *Explain) String() string

type Expr

type Expr interface {
	fmt.Stringer
	// Walk replaces each child of the receiver with the return of
	// `WalkExpr(v, child)`. For childless (leaf) Exprs, its
	// implementation is empty.
	Walk(Visitor)
	// TypeCheck returns the zero value of the expression's type, or an
	// error if the expression doesn't type-check.
	TypeCheck() (Datum, error)
	// Eval evaluates an SQL expression. Expression evaluation is a mostly
	// straightforward walk over the parse tree. The only significant complexity is
	// the handling of types and implicit conversions. See binOps and cmpOps for
	// more details. Note that expression evaluation returns an error if certain
	// node types are encountered: ValArg, QualifiedName or Subquery. These nodes
	// should be replaced prior to expression evaluation by an appropriate
	// WalkExpr. For example, ValArg should be replace by the argument passed from
	// the client.
	Eval(EvalContext) (Datum, error)
}

Expr represents an expression.

func ParseExpr

func ParseExpr(expr string, syntax Syntax) (Expr, error)

ParseExpr parses a sql expression.

func WalkExpr

func WalkExpr(v Visitor, expr Expr) Expr

WalkExpr traverses the nodes in an expression.

type Exprs

type Exprs []Expr

Exprs represents a list of value expressions. It's not a valid expression because it's not parenthesized.

func (Exprs) String

func (node Exprs) String() string

type FloatType

type FloatType struct {
	Name string
	Prec int
}

FloatType represents a REAL, DOUBLE or FLOAT type.

func (*FloatType) String

func (node *FloatType) String() string

type FuncExpr

type FuncExpr struct {
	Name     *QualifiedName
	Distinct bool
	Exprs    Exprs
	// contains filtered or unexported fields
}

FuncExpr represents a function call.

func (*FuncExpr) Eval

func (expr *FuncExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*FuncExpr) String

func (node *FuncExpr) String() string

func (*FuncExpr) TypeCheck

func (expr *FuncExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*FuncExpr) Walk

func (expr *FuncExpr) Walk(v Visitor)

Walk implements the Expr interface.

type Grant

type Grant struct {
	Privileges privilege.List
	Targets    TargetList
	Grantees   NameList
}

Grant represents a GRANT statement.

func (*Grant) StatementType

func (*Grant) StatementType() StatementType

StatementType implements the Statement interface.

func (*Grant) String

func (node *Grant) String() string

type GroupBy

type GroupBy []Expr

GroupBy represents a GROUP BY clause.

func (GroupBy) String

func (node GroupBy) String() string

type IfExpr

type IfExpr struct {
	Cond Expr
	True Expr
	Else Expr
}

IfExpr represents an IF expression.

func (*IfExpr) Eval

func (expr *IfExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*IfExpr) String

func (node *IfExpr) String() string

func (*IfExpr) TypeCheck

func (expr *IfExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*IfExpr) Walk

func (expr *IfExpr) Walk(v Visitor)

Walk implements the Expr interface.

type IndexIndirection

type IndexIndirection Name

IndexIndirection represents ":<name>" in an indirection expression.

func (IndexIndirection) String

func (n IndexIndirection) String() string

type IndexTableDef

type IndexTableDef struct {
	Name    Name
	Columns NameList
	Storing NameList
}

IndexTableDef represents an index definition within a CREATE TABLE statement.

func (*IndexTableDef) String

func (node *IndexTableDef) String() string

type Indirection

type Indirection []IndirectionElem

Indirection represents an indirection expression composed of a series of indirection elements.

func (Indirection) String

func (i Indirection) String() string

type IndirectionElem

type IndirectionElem interface {
	String() string
	// contains filtered or unexported methods
}

IndirectionElem is a single element in an indirection expression.

type Insert

type Insert struct {
	Table   *QualifiedName
	Columns QualifiedNames
	Rows    SelectStatement
}

Insert represents an INSERT statement.

func (*Insert) DefaultValues

func (node *Insert) DefaultValues() bool

DefaultValues returns true iff only default values are being inserted.

func (*Insert) StatementType

func (*Insert) StatementType() StatementType

StatementType implements the Statement interface.

func (*Insert) String

func (node *Insert) String() string

type IntType

type IntType struct {
	Name string
	N    int
}

IntType represents an INT, INTEGER, SMALLINT or BIGINT type.

func (*IntType) String

func (node *IntType) String() string

type IntVal

type IntVal int64

IntVal represents an integer.

func (IntVal) Eval

func (t IntVal) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (IntVal) String

func (node IntVal) String() string

func (IntVal) TypeCheck

func (expr IntVal) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (IntVal) Walk

func (IntVal) Walk(_ Visitor)

Walk implements the Expr interface.

type IntervalType

type IntervalType struct {
}

IntervalType represents a INTERVAL type

func (*IntervalType) String

func (node *IntervalType) String() string

type IsOfTypeExpr

type IsOfTypeExpr struct {
	Not   bool
	Expr  Expr
	Types []ColumnType
}

IsOfTypeExpr represents an IS {,NOT} OF (type_list) expression.

func (*IsOfTypeExpr) Eval

func (expr *IsOfTypeExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*IsOfTypeExpr) String

func (node *IsOfTypeExpr) String() string

func (*IsOfTypeExpr) TypeCheck

func (expr *IsOfTypeExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*IsOfTypeExpr) Walk

func (*IsOfTypeExpr) Walk(_ Visitor)

Walk implements the Expr interface.

type IsOp

type IsOp int

IsOp represents an IS expression operator.

type IsolationLevel

type IsolationLevel int

IsolationLevel holds the isolation level for a transaction.

const (
	UnspecifiedIsolation IsolationLevel = iota
	SnapshotIsolation
	SerializableIsolation
)

IsolationLevel values

func (IsolationLevel) String

func (i IsolationLevel) String() string

type JoinCond

type JoinCond interface {
	// contains filtered or unexported methods
}

JoinCond represents a join condition.

type JoinTableExpr

type JoinTableExpr struct {
	Join  string
	Left  TableExpr
	Right TableExpr
	Cond  JoinCond
}

JoinTableExpr represents a TableExpr that's a JOIN operation.

func (*JoinTableExpr) String

func (node *JoinTableExpr) String() string

type Limit

type Limit struct {
	Offset, Count Expr
}

Limit represents a LIMIT clause.

func (*Limit) String

func (node *Limit) String() string

type Name

type Name string

A Name is an SQL identifier.

func (Name) String

func (n Name) String() string

String formats an SQL identifier, applying proper escaping rules.

type NameIndirection

type NameIndirection Name

NameIndirection represents ".<name>" in an indirection expression.

func (NameIndirection) String

func (n NameIndirection) String() string

type NameList

type NameList []string

A NameList is a list of identifier. TODO(tschottdorf): would be nicer to have []Name here but unless we want to introduce new types to the grammar, NameList([]string{...}) needs to work.

func (NameList) String

func (l NameList) String() string

String formats the contained names as a comma-separated, escaped string.

type NotExpr

type NotExpr struct {
	Expr Expr
}

NotExpr represents a NOT expression.

func (*NotExpr) Eval

func (expr *NotExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*NotExpr) String

func (node *NotExpr) String() string

func (*NotExpr) TypeCheck

func (expr *NotExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*NotExpr) Walk

func (expr *NotExpr) Walk(v Visitor)

Walk implements the Expr interface.

type NotNullConstraint

type NotNullConstraint struct{}

NotNullConstraint represents NOT NULL on a column.

type NullConstraint

type NullConstraint struct{}

NullConstraint represents NULL on a column.

type NullIfExpr

type NullIfExpr struct {
	Expr1 Expr
	Expr2 Expr
}

NullIfExpr represents a NULLIF expression.

func (*NullIfExpr) Eval

func (expr *NullIfExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*NullIfExpr) String

func (node *NullIfExpr) String() string

func (*NullIfExpr) TypeCheck

func (expr *NullIfExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*NullIfExpr) Walk

func (expr *NullIfExpr) Walk(v Visitor)

Walk implements the Expr interface.

type Nullability

type Nullability int

Nullability represents either NULL, NOT NULL or an unspecified value (silent NULL).

const (
	NotNull Nullability = iota
	Null
	SilentNull
)

The values for NullType.

type NumVal

type NumVal string

NumVal represents a number.

func (NumVal) Eval

func (t NumVal) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (NumVal) String

func (node NumVal) String() string

func (NumVal) TypeCheck

func (expr NumVal) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (NumVal) Walk

func (NumVal) Walk(_ Visitor)

Walk implements the Expr interface.

type OnJoinCond

type OnJoinCond struct {
	Expr Expr
}

OnJoinCond represents an ON join condition.

func (*OnJoinCond) String

func (node *OnJoinCond) String() string

type OrExpr

type OrExpr struct {
	Left, Right Expr
}

OrExpr represents an OR expression.

func (*OrExpr) Eval

func (expr *OrExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*OrExpr) String

func (node *OrExpr) String() string

func (*OrExpr) TypeCheck

func (expr *OrExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*OrExpr) Walk

func (expr *OrExpr) Walk(v Visitor)

Walk implements the Expr interface.

type Order

type Order struct {
	Expr      Expr
	Direction Direction
}

Order represents an ordering expression.

func (*Order) String

func (node *Order) String() string

type OrderBy

type OrderBy []*Order

OrderBy represents an ORDER By clause.

func (OrderBy) String

func (node OrderBy) String() string

type ParenExpr

type ParenExpr struct {
	Expr
}

ParenExpr represents a parenthesized expression.

func (*ParenExpr) String

func (node *ParenExpr) String() string

func (*ParenExpr) Walk

func (expr *ParenExpr) Walk(v Visitor)

Walk implements the Expr interface.

type ParenSelect

type ParenSelect struct {
	Select SelectStatement
}

ParenSelect represents a parenthesized SELECT/UNION/VALUES statement.

func (*ParenSelect) StatementType

func (*ParenSelect) StatementType() StatementType

StatementType implements the Statement interface.

func (*ParenSelect) String

func (node *ParenSelect) String() string

type ParenTableExpr

type ParenTableExpr struct {
	Expr TableExpr
}

ParenTableExpr represents a parenthesized TableExpr.

func (*ParenTableExpr) String

func (node *ParenTableExpr) String() string

type PrimaryKeyConstraint

type PrimaryKeyConstraint struct{}

PrimaryKeyConstraint represents NULL on a column.

type QualifiedName

type QualifiedName struct {
	Base     Name
	Indirect Indirection
	// contains filtered or unexported fields
}

QualifiedName is a base name and an optional indirection expression.

func StarExpr

func StarExpr() *QualifiedName

StarExpr is a convenience function that represents an unqualified "*".

func (*QualifiedName) Column

func (n *QualifiedName) Column() string

Column returns the column portion of the name. Note that the returned string is not quoted even if the name is a keyword.

func (*QualifiedName) Database

func (n *QualifiedName) Database() string

Database returns the database portion of the name. Note that the returned string is not quoted even if the name is a keyword.

func (*QualifiedName) Eval

func (t *QualifiedName) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*QualifiedName) Index

func (n *QualifiedName) Index() string

Index returns the index portion of the name. Note that the returned string is not quoted even if the name is a keyword.

func (*QualifiedName) IsStar

func (n *QualifiedName) IsStar() bool

IsStar returns true iff the qualified name contains matches "".* or table.*.

func (*QualifiedName) NormalizeColumnName

func (n *QualifiedName) NormalizeColumnName() error

NormalizeColumnName normalizes the qualified name to contain a table name as prefix, returning an error if unable to do so or if the name is not a valid column name (e.g. it contains too many indirections). If normalization occurred, the modified qualified name will have n.Base == "" to indicate no explicit table was specified. The incoming qualified name should have one of the following forms:

*
table.*
column
column[array-indirection]
table.column
table.column[array-indirection]

Note that "table" may be the empty string. On successful normalization the qualified name will have one of the forms:

table.*
table.column
table.column[array-indirection]

func (*QualifiedName) NormalizeTableName

func (n *QualifiedName) NormalizeTableName(database string) error

NormalizeTableName normalizes the qualified name to contain a database name as prefix, returning an error if unable to do so or if the name is not a valid table name (e.g. it contains an array indirection). The incoming qualified name should have one of the following forms:

table
database.table
table@index
database.table@index

On successful normalization, the qualified name will have the form:

database.table@index

func (*QualifiedName) String

func (n *QualifiedName) String() string

func (*QualifiedName) Table

func (n *QualifiedName) Table() string

Table returns the table portion of the name. Note that the returned string is not quoted even if the name is a keyword.

func (*QualifiedName) TypeCheck

func (expr *QualifiedName) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*QualifiedName) Variable

func (*QualifiedName) Variable()

Variable implements the VariableExpr interface.

func (*QualifiedName) Walk

func (*QualifiedName) Walk(_ Visitor)

Walk implements the Expr interface.

type QualifiedNames

type QualifiedNames []*QualifiedName

QualifiedNames represents a command separated list (see the String method) of qualified names.

func (QualifiedNames) String

func (n QualifiedNames) String() string

type RangeCond

type RangeCond struct {
	Not      bool
	Left     Expr
	From, To Expr
}

RangeCond represents a BETWEEN or a NOT BETWEEN expression.

func (*RangeCond) Eval

func (t *RangeCond) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*RangeCond) String

func (node *RangeCond) String() string

func (*RangeCond) TypeCheck

func (expr *RangeCond) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*RangeCond) Walk

func (expr *RangeCond) Walk(v Visitor)

Walk implements the Expr interface.

type RegexpCache

type RegexpCache struct {
	// contains filtered or unexported fields
}

A RegexpCache is a cache used to store compiled regular expressions. The cache is safe for concurrent use by multiple goroutines. It is also safe to use the cache through a nil reference, where it will act like a valid cache with no capacity.

func NewRegexpCache

func NewRegexpCache(size int) *RegexpCache

NewRegexpCache creates a new RegexpCache of the given size. The underlying cache internally uses a hash map, so lookups are cheap.

func (*RegexpCache) Clear

func (rc *RegexpCache) Clear()

Clear clears all regular expressions from the cache.

func (*RegexpCache) GetRegexp

func (rc *RegexpCache) GetRegexp(key regexpCacheKey) (*regexp.Regexp, error)

GetRegexp consults the cache for the regular expressions stored for the given key, compiling the key's pattern if it is not already in the cache.

func (*RegexpCache) Len

func (rc *RegexpCache) Len() int

Len returns the number of compiled regular expressions in the cache.

type RenameColumn

type RenameColumn struct {
	Table   *QualifiedName
	Name    Name
	NewName Name
	// IfExists refers to the table, not the column.
	IfExists bool
}

RenameColumn represents a RENAME COLUMN statement.

func (*RenameColumn) StatementType

func (*RenameColumn) StatementType() StatementType

StatementType implements the Statement interface.

func (*RenameColumn) String

func (node *RenameColumn) String() string

type RenameDatabase

type RenameDatabase struct {
	Name    Name
	NewName Name
}

RenameDatabase represents a RENAME DATABASE statement.

func (*RenameDatabase) StatementType

func (*RenameDatabase) StatementType() StatementType

StatementType implements the Statement interface.

func (*RenameDatabase) String

func (node *RenameDatabase) String() string

type RenameIndex

type RenameIndex struct {
	Name     *QualifiedName
	NewName  Name
	IfExists bool
}

RenameIndex represents a RENAME INDEX statement.

func (*RenameIndex) StatementType

func (*RenameIndex) StatementType() StatementType

StatementType implements the Statement interface.

func (*RenameIndex) String

func (node *RenameIndex) String() string

type RenameTable

type RenameTable struct {
	Name     *QualifiedName
	NewName  *QualifiedName
	IfExists bool
}

RenameTable represents a RENAME TABLE statement.

func (*RenameTable) StatementType

func (*RenameTable) StatementType() StatementType

StatementType implements the Statement interface.

func (*RenameTable) String

func (node *RenameTable) String() string

type Revoke

type Revoke struct {
	Privileges privilege.List
	Targets    TargetList
	Grantees   NameList
}

Revoke represents a REVOKE statements. PrivilegeList and TargetList are defined in grant.go

func (*Revoke) StatementType

func (*Revoke) StatementType() StatementType

StatementType implements the Statement interface.

func (*Revoke) String

func (node *Revoke) String() string

type RollbackTransaction

type RollbackTransaction struct{}

RollbackTransaction represents a ROLLBACK statement.

func (*RollbackTransaction) StatementType

func (*RollbackTransaction) StatementType() StatementType

StatementType implements the Statement interface.

func (*RollbackTransaction) String

func (node *RollbackTransaction) String() string

type Row

type Row Exprs

Row represents a parenthesized list of expressions. Similar to Tuple except in how it is textually represented.

func (Row) Eval

func (t Row) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (Row) String

func (node Row) String() string

func (Row) TypeCheck

func (expr Row) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (Row) Walk

func (expr Row) Walk(v Visitor)

Walk implements the Expr interface.

type Select

type Select struct {
	Distinct bool
	Exprs    SelectExprs
	From     TableExprs
	Where    *Where
	GroupBy  GroupBy
	Having   *Where
	OrderBy  OrderBy
	Limit    *Limit
	Lock     string
	// contains filtered or unexported fields
}

Select represents a SELECT statement.

func (*Select) StatementType

func (*Select) StatementType() StatementType

StatementType implements the Statement interface.

func (*Select) String

func (node *Select) String() string

type SelectExpr

type SelectExpr struct {
	Expr Expr
	As   Name
}

SelectExpr represents a SELECT expression.

func StarSelectExpr

func StarSelectExpr() SelectExpr

StarSelectExpr is a convenience function that represents an unqualified "*" in a select expression.

func (SelectExpr) String

func (node SelectExpr) String() string

type SelectExprs

type SelectExprs []SelectExpr

SelectExprs represents SELECT expressions.

func (SelectExprs) String

func (node SelectExprs) String() string

type SelectStatement

type SelectStatement interface {
	Statement
	// contains filtered or unexported methods
}

SelectStatement any SELECT statement.

type Set

type Set struct {
	Name   *QualifiedName
	Values Exprs
}

Set represents a SET statement.

func (*Set) StatementType

func (*Set) StatementType() StatementType

StatementType implements the Statement interface.

func (*Set) String

func (node *Set) String() string

type SetTimeZone

type SetTimeZone struct {
	Value Expr
}

SetTimeZone represents a SET TIME ZONE statement.

func (*SetTimeZone) StatementType

func (*SetTimeZone) StatementType() StatementType

StatementType implements the Statement interface.

func (*SetTimeZone) String

func (node *SetTimeZone) String() string

type SetTransaction

type SetTransaction struct {
	Isolation IsolationLevel
}

SetTransaction represents a SET TRANSACTION statement.

func (*SetTransaction) StatementType

func (*SetTransaction) StatementType() StatementType

StatementType implements the Statement interface.

func (*SetTransaction) String

func (node *SetTransaction) String() string

type Show

type Show struct {
	Name string
}

Show represents a SHOW statement.

func (*Show) StatementType

func (*Show) StatementType() StatementType

StatementType implements the Statement interface.

func (*Show) String

func (node *Show) String() string

type ShowColumns

type ShowColumns struct {
	Table *QualifiedName
}

ShowColumns represents a SHOW COLUMNS statement.

func (*ShowColumns) StatementType

func (*ShowColumns) StatementType() StatementType

StatementType implements the Statement interface.

func (*ShowColumns) String

func (node *ShowColumns) String() string

type ShowDatabases

type ShowDatabases struct {
}

ShowDatabases represents a SHOW DATABASES statement.

func (*ShowDatabases) StatementType

func (*ShowDatabases) StatementType() StatementType

StatementType implements the Statement interface.

func (*ShowDatabases) String

func (node *ShowDatabases) String() string

type ShowGrants

type ShowGrants struct {
	Targets  *TargetList
	Grantees NameList
}

ShowGrants represents a SHOW GRANTS statement. TargetList is defined in grant.go.

func (*ShowGrants) StatementType

func (*ShowGrants) StatementType() StatementType

StatementType implements the Statement interface.

func (*ShowGrants) String

func (node *ShowGrants) String() string

type ShowIndex

type ShowIndex struct {
	Table *QualifiedName
}

ShowIndex represents a SHOW INDEX statement.

func (*ShowIndex) StatementType

func (*ShowIndex) StatementType() StatementType

StatementType implements the Statement interface.

func (*ShowIndex) String

func (node *ShowIndex) String() string

type ShowTables

type ShowTables struct {
	Name *QualifiedName
}

ShowTables represents a SHOW TABLES statement.

func (*ShowTables) StatementType

func (*ShowTables) StatementType() StatementType

StatementType implements the Statement interface.

func (*ShowTables) String

func (node *ShowTables) String() string

type SimpleTableExpr

type SimpleTableExpr interface {
	// contains filtered or unexported methods
}

SimpleTableExpr represents a simple table expression.

type StarIndirection

type StarIndirection string

StarIndirection represents ".*" in an indirection expression.

func (StarIndirection) String

func (s StarIndirection) String() string

type Statement

type Statement interface {
	fmt.Stringer
	StatementType() StatementType
}

Statement represents a statement.

type StatementList

type StatementList []Statement

StatementList is a list of statements.

func Parse

func Parse(sql string, syntax Syntax) (StatementList, error)

Parse parses the sql and returns a list of statements.

func ParseTraditional

func ParseTraditional(sql string) (StatementList, error)

ParseTraditional is short-hand for Parse(sql, Traditional)

func (StatementList) String

func (l StatementList) String() string

type StatementType

type StatementType int

StatementType is the enumerated type for Statement return styles on the wire.

const (
	// Ack indicates that the statement does not have a meaningful
	// return. Examples include SET, BEGIN, COMMIT.
	Ack StatementType = iota
	// DDL indicates that the statement mutates the database schema.
	DDL
	// RowsAffected indicates that the statement returns the count of
	// affected rows.
	RowsAffected
	// Rows indicates that the statement returns the affected rows after
	// the statement was applied.
	Rows
)

type StringType

type StringType struct {
	Name string
	N    int
}

StringType represents a STRING, CHAR or VARCHAR type.

func (*StringType) String

func (node *StringType) String() string

type Subquery

type Subquery struct {
	Select SelectStatement
}

Subquery represents a subquery.

func (*Subquery) Eval

func (t *Subquery) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*Subquery) String

func (node *Subquery) String() string

func (*Subquery) TypeCheck

func (expr *Subquery) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*Subquery) Walk

func (expr *Subquery) Walk(v Visitor)

Walk implements the Expr interface.

type Syntax

type Syntax int

Syntax is an enum of the various syntax types.

const (
	Traditional Syntax = iota
	Modern
)

func (Syntax) String

func (i Syntax) String() string

type TableDef

type TableDef interface {
	// contains filtered or unexported methods
}

TableDef represents a column or index definition within a CREATE TABLE statement.

type TableDefs

type TableDefs []TableDef

TableDefs represents a list of table definitions.

func (TableDefs) String

func (node TableDefs) String() string

type TableExpr

type TableExpr interface {
	// contains filtered or unexported methods
}

TableExpr represents a table expression.

type TableExprs

type TableExprs []TableExpr

TableExprs represents a list of table expressions.

func (TableExprs) String

func (node TableExprs) String() string

type TargetList

type TargetList struct {
	Databases NameList
	Tables    QualifiedNames
}

TargetList represents a list of targets. Only one field may be non-nil.

func (TargetList) String

func (tl TargetList) String() string

type TargetType

type TargetType int

TargetType represents the type of target.

const (
	TargetDatabase TargetType = iota
)

Enums for target and privilege types.

func (TargetType) String

func (tt TargetType) String() string

type TimestampType

type TimestampType struct {
}

TimestampType represents a TIMESTAMP type.

func (*TimestampType) String

func (node *TimestampType) String() string

type Truncate

type Truncate struct {
	Tables QualifiedNames
}

Truncate represents a TRUNCATE statement.

func (*Truncate) StatementType

func (*Truncate) StatementType() StatementType

StatementType implements the Statement interface.

func (*Truncate) String

func (node *Truncate) String() string

type Tuple

type Tuple Exprs

Tuple represents a parenthesized list of expressions.

func (Tuple) Eval

func (t Tuple) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (Tuple) String

func (node Tuple) String() string

func (Tuple) TypeCheck

func (expr Tuple) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (Tuple) Walk

func (expr Tuple) Walk(v Visitor)

Walk implements the Expr interface.

type UnaryExpr

type UnaryExpr struct {
	Operator UnaryOp
	Expr     Expr
	// contains filtered or unexported fields
}

UnaryExpr represents a unary value expression.

func (*UnaryExpr) Eval

func (expr *UnaryExpr) Eval(ctx EvalContext) (Datum, error)

Eval implements the Expr interface.

func (*UnaryExpr) String

func (node *UnaryExpr) String() string

func (*UnaryExpr) TypeCheck

func (expr *UnaryExpr) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (*UnaryExpr) Walk

func (expr *UnaryExpr) Walk(v Visitor)

Walk implements the Expr interface.

type UnaryOp

type UnaryOp int

UnaryOp represents a unary operator.

const (
	UnaryPlus UnaryOp = iota
	UnaryMinus
	UnaryComplement
)

UnaryExpr.Operator

func (UnaryOp) String

func (i UnaryOp) String() string

type Union

type Union struct {
	Type        string
	Left, Right SelectStatement
	All         bool
}

Union represents a UNION statement.

func (*Union) StatementType

func (*Union) StatementType() StatementType

StatementType implements the Statement interface.

func (*Union) String

func (node *Union) String() string

type UniqueConstraint

type UniqueConstraint struct{}

UniqueConstraint represents UNIQUE on a column.

type UniqueConstraintTableDef

type UniqueConstraintTableDef struct {
	IndexTableDef
	PrimaryKey bool
}

UniqueConstraintTableDef represents a unique constraint within a CREATE TABLE statement.

func (*UniqueConstraintTableDef) String

func (node *UniqueConstraintTableDef) String() string

type Update

type Update struct {
	Table TableExpr
	Exprs UpdateExprs
	Where *Where
}

Update represents an UPDATE statement.

func (*Update) StatementType

func (*Update) StatementType() StatementType

StatementType implements the Statement interface.

func (*Update) String

func (node *Update) String() string

type UpdateExpr

type UpdateExpr struct {
	Tuple bool
	Names QualifiedNames
	Expr  Expr
}

UpdateExpr represents an update expression.

func (*UpdateExpr) String

func (node *UpdateExpr) String() string

type UpdateExprs

type UpdateExprs []*UpdateExpr

UpdateExprs represents a list of update expressions.

func (UpdateExprs) String

func (node UpdateExprs) String() string

type UsingJoinCond

type UsingJoinCond struct {
	Cols NameList
}

UsingJoinCond represents a USING join condition.

func (*UsingJoinCond) String

func (node *UsingJoinCond) String() string

type ValArg

type ValArg struct {
	// contains filtered or unexported fields
}

ValArg represents a named bind var argument.

func (ValArg) Eval

func (t ValArg) Eval(_ EvalContext) (Datum, error)

Eval implements the Expr interface.

func (ValArg) String

func (node ValArg) String() string

func (ValArg) TypeCheck

func (expr ValArg) TypeCheck() (Datum, error)

TypeCheck implements the Expr interface.

func (ValArg) Variable

func (ValArg) Variable()

Variable implements the VariableExpr interface.

func (ValArg) Walk

func (ValArg) Walk(_ Visitor)

Walk implements the Expr interface.

type Values

type Values []Tuple

Values represents a VALUES clause.

func (Values) StatementType

func (Values) StatementType() StatementType

StatementType implements the Statement interface.

func (Values) String

func (node Values) String() string

type VariableExpr

type VariableExpr interface {
	Expr
	Variable()
}

VariableExpr is an Expr that may change per row. It is used to signal the evaluation/simplification machinery that the underlying Expr is not constant.

type Visitor

type Visitor interface {
	Visit(expr Expr, pre bool) (Visitor, Expr)
}

The Visitor Visit method is invoked for each Expr node encountered by WalkExpr. The returned Expr replaces the pointer to the visited expression in the parent node and can be used for rewriting expressions. The pre argument indicates whether the visit is a pre-order or post-order visit. On a pre-order visit, if the result Visitor is nil children nodes are skipped from the traversal.

type When

type When struct {
	Cond Expr
	Val  Expr
}

When represents a WHEN sub-expression.

func (*When) String

func (node *When) String() string

type Where

type Where struct {
	Type string
	Expr Expr
}

Where represents a WHERE or HAVING clause.

func (*Where) String

func (node *Where) String() string

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