sqlglot.dialects.mysql
1from __future__ import annotations 2 3from sqlglot import exp, generator, parser, tokens 4from sqlglot.dialects.dialect import ( 5 Dialect, 6 locate_to_strposition, 7 min_or_least, 8 no_ilike_sql, 9 no_paren_current_date_sql, 10 no_tablesample_sql, 11 no_trycast_sql, 12 rename_func, 13 strposition_to_locate_sql, 14) 15from sqlglot.helper import seq_get 16from sqlglot.tokens import TokenType 17 18 19def _show_parser(*args, **kwargs): 20 def _parse(self): 21 return self._parse_show_mysql(*args, **kwargs) 22 23 return _parse 24 25 26def _date_trunc_sql(self, expression): 27 expr = self.sql(expression, "this") 28 unit = expression.text("unit") 29 30 if unit == "day": 31 return f"DATE({expr})" 32 33 if unit == "week": 34 concat = f"CONCAT(YEAR({expr}), ' ', WEEK({expr}, 1), ' 1')" 35 date_format = "%Y %u %w" 36 elif unit == "month": 37 concat = f"CONCAT(YEAR({expr}), ' ', MONTH({expr}), ' 1')" 38 date_format = "%Y %c %e" 39 elif unit == "quarter": 40 concat = f"CONCAT(YEAR({expr}), ' ', QUARTER({expr}) * 3 - 2, ' 1')" 41 date_format = "%Y %c %e" 42 elif unit == "year": 43 concat = f"CONCAT(YEAR({expr}), ' 1 1')" 44 date_format = "%Y %c %e" 45 else: 46 self.unsupported(f"Unexpected interval unit: {unit}") 47 return f"DATE({expr})" 48 49 return f"STR_TO_DATE({concat}, '{date_format}')" 50 51 52def _str_to_date(args): 53 date_format = MySQL.format_time(seq_get(args, 1)) 54 return exp.StrToDate(this=seq_get(args, 0), format=date_format) 55 56 57def _str_to_date_sql(self, expression): 58 date_format = self.format_time(expression) 59 return f"STR_TO_DATE({self.sql(expression.this)}, {date_format})" 60 61 62def _trim_sql(self, expression): 63 target = self.sql(expression, "this") 64 trim_type = self.sql(expression, "position") 65 remove_chars = self.sql(expression, "expression") 66 67 # Use TRIM/LTRIM/RTRIM syntax if the expression isn't mysql-specific 68 if not remove_chars: 69 return self.trim_sql(expression) 70 71 trim_type = f"{trim_type} " if trim_type else "" 72 remove_chars = f"{remove_chars} " if remove_chars else "" 73 from_part = "FROM " if trim_type or remove_chars else "" 74 return f"TRIM({trim_type}{remove_chars}{from_part}{target})" 75 76 77def _date_add(expression_class): 78 def func(args): 79 interval = seq_get(args, 1) 80 return expression_class( 81 this=seq_get(args, 0), 82 expression=interval.this, 83 unit=exp.Literal.string(interval.text("unit").lower()), 84 ) 85 86 return func 87 88 89def _date_add_sql(kind): 90 def func(self, expression): 91 this = self.sql(expression, "this") 92 unit = expression.text("unit").upper() or "DAY" 93 return ( 94 f"DATE_{kind}({this}, {self.sql(exp.Interval(this=expression.expression, unit=unit))})" 95 ) 96 97 return func 98 99 100class MySQL(Dialect): 101 time_format = "'%Y-%m-%d %T'" 102 103 # https://prestodb.io/docs/current/functions/datetime.html#mysql-date-functions 104 time_mapping = { 105 "%M": "%B", 106 "%c": "%-m", 107 "%e": "%-d", 108 "%h": "%I", 109 "%i": "%M", 110 "%s": "%S", 111 "%S": "%S", 112 "%u": "%W", 113 "%k": "%-H", 114 "%l": "%-I", 115 "%T": "%H:%M:%S", 116 } 117 118 class Tokenizer(tokens.Tokenizer): 119 QUOTES = ["'", '"'] 120 COMMENTS = ["--", "#", ("/*", "*/")] 121 IDENTIFIERS = ["`"] 122 STRING_ESCAPES = ["'", "\\"] 123 BIT_STRINGS = [("b'", "'"), ("B'", "'"), ("0b", "")] 124 HEX_STRINGS = [("x'", "'"), ("X'", "'"), ("0x", "")] 125 126 KEYWORDS = { 127 **tokens.Tokenizer.KEYWORDS, 128 "MEDIUMTEXT": TokenType.MEDIUMTEXT, 129 "LONGTEXT": TokenType.LONGTEXT, 130 "MEDIUMBLOB": TokenType.MEDIUMBLOB, 131 "LONGBLOB": TokenType.LONGBLOB, 132 "START": TokenType.BEGIN, 133 "SEPARATOR": TokenType.SEPARATOR, 134 "_ARMSCII8": TokenType.INTRODUCER, 135 "_ASCII": TokenType.INTRODUCER, 136 "_BIG5": TokenType.INTRODUCER, 137 "_BINARY": TokenType.INTRODUCER, 138 "_CP1250": TokenType.INTRODUCER, 139 "_CP1251": TokenType.INTRODUCER, 140 "_CP1256": TokenType.INTRODUCER, 141 "_CP1257": TokenType.INTRODUCER, 142 "_CP850": TokenType.INTRODUCER, 143 "_CP852": TokenType.INTRODUCER, 144 "_CP866": TokenType.INTRODUCER, 145 "_CP932": TokenType.INTRODUCER, 146 "_DEC8": TokenType.INTRODUCER, 147 "_EUCJPMS": TokenType.INTRODUCER, 148 "_EUCKR": TokenType.INTRODUCER, 149 "_GB18030": TokenType.INTRODUCER, 150 "_GB2312": TokenType.INTRODUCER, 151 "_GBK": TokenType.INTRODUCER, 152 "_GEOSTD8": TokenType.INTRODUCER, 153 "_GREEK": TokenType.INTRODUCER, 154 "_HEBREW": TokenType.INTRODUCER, 155 "_HP8": TokenType.INTRODUCER, 156 "_KEYBCS2": TokenType.INTRODUCER, 157 "_KOI8R": TokenType.INTRODUCER, 158 "_KOI8U": TokenType.INTRODUCER, 159 "_LATIN1": TokenType.INTRODUCER, 160 "_LATIN2": TokenType.INTRODUCER, 161 "_LATIN5": TokenType.INTRODUCER, 162 "_LATIN7": TokenType.INTRODUCER, 163 "_MACCE": TokenType.INTRODUCER, 164 "_MACROMAN": TokenType.INTRODUCER, 165 "_SJIS": TokenType.INTRODUCER, 166 "_SWE7": TokenType.INTRODUCER, 167 "_TIS620": TokenType.INTRODUCER, 168 "_UCS2": TokenType.INTRODUCER, 169 "_UJIS": TokenType.INTRODUCER, 170 # https://dev.mysql.com/doc/refman/8.0/en/string-literals.html 171 "_UTF8": TokenType.INTRODUCER, 172 "_UTF16": TokenType.INTRODUCER, 173 "_UTF16LE": TokenType.INTRODUCER, 174 "_UTF32": TokenType.INTRODUCER, 175 "_UTF8MB3": TokenType.INTRODUCER, 176 "_UTF8MB4": TokenType.INTRODUCER, 177 "@@": TokenType.SESSION_PARAMETER, 178 } 179 180 COMMANDS = tokens.Tokenizer.COMMANDS - {TokenType.SHOW} 181 182 class Parser(parser.Parser): 183 FUNC_TOKENS = {*parser.Parser.FUNC_TOKENS, TokenType.SCHEMA, TokenType.DATABASE} # type: ignore 184 185 FUNCTIONS = { 186 **parser.Parser.FUNCTIONS, # type: ignore 187 "DATE_ADD": _date_add(exp.DateAdd), 188 "DATE_SUB": _date_add(exp.DateSub), 189 "STR_TO_DATE": _str_to_date, 190 "LOCATE": locate_to_strposition, 191 "INSTR": lambda args: exp.StrPosition(substr=seq_get(args, 1), this=seq_get(args, 0)), 192 "LEFT": lambda args: exp.Substring( 193 this=seq_get(args, 0), start=exp.Literal.number(1), length=seq_get(args, 1) 194 ), 195 } 196 197 FUNCTION_PARSERS = { 198 **parser.Parser.FUNCTION_PARSERS, # type: ignore 199 "GROUP_CONCAT": lambda self: self.expression( 200 exp.GroupConcat, 201 this=self._parse_lambda(), 202 separator=self._match(TokenType.SEPARATOR) and self._parse_field(), 203 ), 204 } 205 206 PROPERTY_PARSERS = { 207 **parser.Parser.PROPERTY_PARSERS, # type: ignore 208 "ENGINE": lambda self: self._parse_property_assignment(exp.EngineProperty), 209 } 210 211 STATEMENT_PARSERS = { 212 **parser.Parser.STATEMENT_PARSERS, # type: ignore 213 TokenType.SHOW: lambda self: self._parse_show(), 214 } 215 216 SHOW_PARSERS = { 217 "BINARY LOGS": _show_parser("BINARY LOGS"), 218 "MASTER LOGS": _show_parser("BINARY LOGS"), 219 "BINLOG EVENTS": _show_parser("BINLOG EVENTS"), 220 "CHARACTER SET": _show_parser("CHARACTER SET"), 221 "CHARSET": _show_parser("CHARACTER SET"), 222 "COLLATION": _show_parser("COLLATION"), 223 "FULL COLUMNS": _show_parser("COLUMNS", target="FROM", full=True), 224 "COLUMNS": _show_parser("COLUMNS", target="FROM"), 225 "CREATE DATABASE": _show_parser("CREATE DATABASE", target=True), 226 "CREATE EVENT": _show_parser("CREATE EVENT", target=True), 227 "CREATE FUNCTION": _show_parser("CREATE FUNCTION", target=True), 228 "CREATE PROCEDURE": _show_parser("CREATE PROCEDURE", target=True), 229 "CREATE TABLE": _show_parser("CREATE TABLE", target=True), 230 "CREATE TRIGGER": _show_parser("CREATE TRIGGER", target=True), 231 "CREATE VIEW": _show_parser("CREATE VIEW", target=True), 232 "DATABASES": _show_parser("DATABASES"), 233 "ENGINE": _show_parser("ENGINE", target=True), 234 "STORAGE ENGINES": _show_parser("ENGINES"), 235 "ENGINES": _show_parser("ENGINES"), 236 "ERRORS": _show_parser("ERRORS"), 237 "EVENTS": _show_parser("EVENTS"), 238 "FUNCTION CODE": _show_parser("FUNCTION CODE", target=True), 239 "FUNCTION STATUS": _show_parser("FUNCTION STATUS"), 240 "GRANTS": _show_parser("GRANTS", target="FOR"), 241 "INDEX": _show_parser("INDEX", target="FROM"), 242 "MASTER STATUS": _show_parser("MASTER STATUS"), 243 "OPEN TABLES": _show_parser("OPEN TABLES"), 244 "PLUGINS": _show_parser("PLUGINS"), 245 "PROCEDURE CODE": _show_parser("PROCEDURE CODE", target=True), 246 "PROCEDURE STATUS": _show_parser("PROCEDURE STATUS"), 247 "PRIVILEGES": _show_parser("PRIVILEGES"), 248 "FULL PROCESSLIST": _show_parser("PROCESSLIST", full=True), 249 "PROCESSLIST": _show_parser("PROCESSLIST"), 250 "PROFILE": _show_parser("PROFILE"), 251 "PROFILES": _show_parser("PROFILES"), 252 "RELAYLOG EVENTS": _show_parser("RELAYLOG EVENTS"), 253 "REPLICAS": _show_parser("REPLICAS"), 254 "SLAVE HOSTS": _show_parser("REPLICAS"), 255 "REPLICA STATUS": _show_parser("REPLICA STATUS"), 256 "SLAVE STATUS": _show_parser("REPLICA STATUS"), 257 "GLOBAL STATUS": _show_parser("STATUS", global_=True), 258 "SESSION STATUS": _show_parser("STATUS"), 259 "STATUS": _show_parser("STATUS"), 260 "TABLE STATUS": _show_parser("TABLE STATUS"), 261 "FULL TABLES": _show_parser("TABLES", full=True), 262 "TABLES": _show_parser("TABLES"), 263 "TRIGGERS": _show_parser("TRIGGERS"), 264 "GLOBAL VARIABLES": _show_parser("VARIABLES", global_=True), 265 "SESSION VARIABLES": _show_parser("VARIABLES"), 266 "VARIABLES": _show_parser("VARIABLES"), 267 "WARNINGS": _show_parser("WARNINGS"), 268 } 269 270 SET_PARSERS = { 271 **parser.Parser.SET_PARSERS, 272 "PERSIST": lambda self: self._parse_set_item_assignment("PERSIST"), 273 "PERSIST_ONLY": lambda self: self._parse_set_item_assignment("PERSIST_ONLY"), 274 "CHARACTER SET": lambda self: self._parse_set_item_charset("CHARACTER SET"), 275 "CHARSET": lambda self: self._parse_set_item_charset("CHARACTER SET"), 276 "NAMES": lambda self: self._parse_set_item_names(), 277 } 278 279 PROFILE_TYPES = { 280 "ALL", 281 "BLOCK IO", 282 "CONTEXT SWITCHES", 283 "CPU", 284 "IPC", 285 "MEMORY", 286 "PAGE FAULTS", 287 "SOURCE", 288 "SWAPS", 289 } 290 291 def _parse_show_mysql(self, this, target=False, full=None, global_=None): 292 if target: 293 if isinstance(target, str): 294 self._match_text_seq(target) 295 target_id = self._parse_id_var() 296 else: 297 target_id = None 298 299 log = self._parse_string() if self._match_text_seq("IN") else None 300 301 if this in {"BINLOG EVENTS", "RELAYLOG EVENTS"}: 302 position = self._parse_number() if self._match_text_seq("FROM") else None 303 db = None 304 else: 305 position = None 306 db = self._parse_id_var() if self._match_text_seq("FROM") else None 307 308 channel = self._parse_id_var() if self._match_text_seq("FOR", "CHANNEL") else None 309 310 like = self._parse_string() if self._match_text_seq("LIKE") else None 311 where = self._parse_where() 312 313 if this == "PROFILE": 314 types = self._parse_csv(lambda: self._parse_var_from_options(self.PROFILE_TYPES)) 315 query = self._parse_number() if self._match_text_seq("FOR", "QUERY") else None 316 offset = self._parse_number() if self._match_text_seq("OFFSET") else None 317 limit = self._parse_number() if self._match_text_seq("LIMIT") else None 318 else: 319 types, query = None, None 320 offset, limit = self._parse_oldstyle_limit() 321 322 mutex = True if self._match_text_seq("MUTEX") else None 323 mutex = False if self._match_text_seq("STATUS") else mutex 324 325 return self.expression( 326 exp.Show, 327 this=this, 328 target=target_id, 329 full=full, 330 log=log, 331 position=position, 332 db=db, 333 channel=channel, 334 like=like, 335 where=where, 336 types=types, 337 query=query, 338 offset=offset, 339 limit=limit, 340 mutex=mutex, 341 **{"global": global_}, 342 ) 343 344 def _parse_oldstyle_limit(self): 345 limit = None 346 offset = None 347 if self._match_text_seq("LIMIT"): 348 parts = self._parse_csv(self._parse_number) 349 if len(parts) == 1: 350 limit = parts[0] 351 elif len(parts) == 2: 352 limit = parts[1] 353 offset = parts[0] 354 return offset, limit 355 356 def _parse_set_item_charset(self, kind): 357 this = self._parse_string() or self._parse_id_var() 358 359 return self.expression( 360 exp.SetItem, 361 this=this, 362 kind=kind, 363 ) 364 365 def _parse_set_item_names(self): 366 charset = self._parse_string() or self._parse_id_var() 367 if self._match_text_seq("COLLATE"): 368 collate = self._parse_string() or self._parse_id_var() 369 else: 370 collate = None 371 return self.expression( 372 exp.SetItem, 373 this=charset, 374 collate=collate, 375 kind="NAMES", 376 ) 377 378 class Generator(generator.Generator): 379 LOCKING_READS_SUPPORTED = True 380 NULL_ORDERING_SUPPORTED = False 381 382 TRANSFORMS = { 383 **generator.Generator.TRANSFORMS, # type: ignore 384 exp.CurrentDate: no_paren_current_date_sql, 385 exp.CurrentTimestamp: lambda *_: "CURRENT_TIMESTAMP", 386 exp.ILike: no_ilike_sql, 387 exp.Min: min_or_least, 388 exp.TableSample: no_tablesample_sql, 389 exp.TryCast: no_trycast_sql, 390 exp.DateAdd: _date_add_sql("ADD"), 391 exp.DateDiff: lambda self, e: f"DATEDIFF({self.format_args(e.this, e.expression)})", 392 exp.DateSub: _date_add_sql("SUB"), 393 exp.DateTrunc: _date_trunc_sql, 394 exp.DayOfWeek: rename_func("DAYOFWEEK"), 395 exp.DayOfMonth: rename_func("DAYOFMONTH"), 396 exp.DayOfYear: rename_func("DAYOFYEAR"), 397 exp.WeekOfYear: rename_func("WEEKOFYEAR"), 398 exp.GroupConcat: lambda self, e: f"""GROUP_CONCAT({self.sql(e, "this")} SEPARATOR {self.sql(e, "separator") or "','"})""", 399 exp.StrToDate: _str_to_date_sql, 400 exp.StrToTime: _str_to_date_sql, 401 exp.Trim: _trim_sql, 402 exp.NullSafeEQ: lambda self, e: self.binary(e, "<=>"), 403 exp.NullSafeNEQ: lambda self, e: self.not_sql(self.binary(e, "<=>")), 404 exp.StrPosition: strposition_to_locate_sql, 405 } 406 407 TYPE_MAPPING = generator.Generator.TYPE_MAPPING.copy() 408 TYPE_MAPPING.pop(exp.DataType.Type.MEDIUMTEXT) 409 TYPE_MAPPING.pop(exp.DataType.Type.LONGTEXT) 410 TYPE_MAPPING.pop(exp.DataType.Type.MEDIUMBLOB) 411 TYPE_MAPPING.pop(exp.DataType.Type.LONGBLOB) 412 413 PROPERTIES_LOCATION = { 414 **generator.Generator.PROPERTIES_LOCATION, # type: ignore 415 exp.TransientProperty: exp.Properties.Location.UNSUPPORTED, 416 } 417 418 def show_sql(self, expression): 419 this = f" {expression.name}" 420 full = " FULL" if expression.args.get("full") else "" 421 global_ = " GLOBAL" if expression.args.get("global") else "" 422 423 target = self.sql(expression, "target") 424 target = f" {target}" if target else "" 425 if expression.name in {"COLUMNS", "INDEX"}: 426 target = f" FROM{target}" 427 elif expression.name == "GRANTS": 428 target = f" FOR{target}" 429 430 db = self._prefixed_sql("FROM", expression, "db") 431 432 like = self._prefixed_sql("LIKE", expression, "like") 433 where = self.sql(expression, "where") 434 435 types = self.expressions(expression, key="types") 436 types = f" {types}" if types else types 437 query = self._prefixed_sql("FOR QUERY", expression, "query") 438 439 if expression.name == "PROFILE": 440 offset = self._prefixed_sql("OFFSET", expression, "offset") 441 limit = self._prefixed_sql("LIMIT", expression, "limit") 442 else: 443 offset = "" 444 limit = self._oldstyle_limit_sql(expression) 445 446 log = self._prefixed_sql("IN", expression, "log") 447 position = self._prefixed_sql("FROM", expression, "position") 448 449 channel = self._prefixed_sql("FOR CHANNEL", expression, "channel") 450 451 if expression.name == "ENGINE": 452 mutex_or_status = " MUTEX" if expression.args.get("mutex") else " STATUS" 453 else: 454 mutex_or_status = "" 455 456 return f"SHOW{full}{global_}{this}{target}{types}{db}{query}{log}{position}{channel}{mutex_or_status}{like}{where}{offset}{limit}" 457 458 def _prefixed_sql(self, prefix, expression, arg): 459 sql = self.sql(expression, arg) 460 if not sql: 461 return "" 462 return f" {prefix} {sql}" 463 464 def _oldstyle_limit_sql(self, expression): 465 limit = self.sql(expression, "limit") 466 offset = self.sql(expression, "offset") 467 if limit: 468 limit_offset = f"{offset}, {limit}" if offset else limit 469 return f" LIMIT {limit_offset}" 470 return ""
101class MySQL(Dialect): 102 time_format = "'%Y-%m-%d %T'" 103 104 # https://prestodb.io/docs/current/functions/datetime.html#mysql-date-functions 105 time_mapping = { 106 "%M": "%B", 107 "%c": "%-m", 108 "%e": "%-d", 109 "%h": "%I", 110 "%i": "%M", 111 "%s": "%S", 112 "%S": "%S", 113 "%u": "%W", 114 "%k": "%-H", 115 "%l": "%-I", 116 "%T": "%H:%M:%S", 117 } 118 119 class Tokenizer(tokens.Tokenizer): 120 QUOTES = ["'", '"'] 121 COMMENTS = ["--", "#", ("/*", "*/")] 122 IDENTIFIERS = ["`"] 123 STRING_ESCAPES = ["'", "\\"] 124 BIT_STRINGS = [("b'", "'"), ("B'", "'"), ("0b", "")] 125 HEX_STRINGS = [("x'", "'"), ("X'", "'"), ("0x", "")] 126 127 KEYWORDS = { 128 **tokens.Tokenizer.KEYWORDS, 129 "MEDIUMTEXT": TokenType.MEDIUMTEXT, 130 "LONGTEXT": TokenType.LONGTEXT, 131 "MEDIUMBLOB": TokenType.MEDIUMBLOB, 132 "LONGBLOB": TokenType.LONGBLOB, 133 "START": TokenType.BEGIN, 134 "SEPARATOR": TokenType.SEPARATOR, 135 "_ARMSCII8": TokenType.INTRODUCER, 136 "_ASCII": TokenType.INTRODUCER, 137 "_BIG5": TokenType.INTRODUCER, 138 "_BINARY": TokenType.INTRODUCER, 139 "_CP1250": TokenType.INTRODUCER, 140 "_CP1251": TokenType.INTRODUCER, 141 "_CP1256": TokenType.INTRODUCER, 142 "_CP1257": TokenType.INTRODUCER, 143 "_CP850": TokenType.INTRODUCER, 144 "_CP852": TokenType.INTRODUCER, 145 "_CP866": TokenType.INTRODUCER, 146 "_CP932": TokenType.INTRODUCER, 147 "_DEC8": TokenType.INTRODUCER, 148 "_EUCJPMS": TokenType.INTRODUCER, 149 "_EUCKR": TokenType.INTRODUCER, 150 "_GB18030": TokenType.INTRODUCER, 151 "_GB2312": TokenType.INTRODUCER, 152 "_GBK": TokenType.INTRODUCER, 153 "_GEOSTD8": TokenType.INTRODUCER, 154 "_GREEK": TokenType.INTRODUCER, 155 "_HEBREW": TokenType.INTRODUCER, 156 "_HP8": TokenType.INTRODUCER, 157 "_KEYBCS2": TokenType.INTRODUCER, 158 "_KOI8R": TokenType.INTRODUCER, 159 "_KOI8U": TokenType.INTRODUCER, 160 "_LATIN1": TokenType.INTRODUCER, 161 "_LATIN2": TokenType.INTRODUCER, 162 "_LATIN5": TokenType.INTRODUCER, 163 "_LATIN7": TokenType.INTRODUCER, 164 "_MACCE": TokenType.INTRODUCER, 165 "_MACROMAN": TokenType.INTRODUCER, 166 "_SJIS": TokenType.INTRODUCER, 167 "_SWE7": TokenType.INTRODUCER, 168 "_TIS620": TokenType.INTRODUCER, 169 "_UCS2": TokenType.INTRODUCER, 170 "_UJIS": TokenType.INTRODUCER, 171 # https://dev.mysql.com/doc/refman/8.0/en/string-literals.html 172 "_UTF8": TokenType.INTRODUCER, 173 "_UTF16": TokenType.INTRODUCER, 174 "_UTF16LE": TokenType.INTRODUCER, 175 "_UTF32": TokenType.INTRODUCER, 176 "_UTF8MB3": TokenType.INTRODUCER, 177 "_UTF8MB4": TokenType.INTRODUCER, 178 "@@": TokenType.SESSION_PARAMETER, 179 } 180 181 COMMANDS = tokens.Tokenizer.COMMANDS - {TokenType.SHOW} 182 183 class Parser(parser.Parser): 184 FUNC_TOKENS = {*parser.Parser.FUNC_TOKENS, TokenType.SCHEMA, TokenType.DATABASE} # type: ignore 185 186 FUNCTIONS = { 187 **parser.Parser.FUNCTIONS, # type: ignore 188 "DATE_ADD": _date_add(exp.DateAdd), 189 "DATE_SUB": _date_add(exp.DateSub), 190 "STR_TO_DATE": _str_to_date, 191 "LOCATE": locate_to_strposition, 192 "INSTR": lambda args: exp.StrPosition(substr=seq_get(args, 1), this=seq_get(args, 0)), 193 "LEFT": lambda args: exp.Substring( 194 this=seq_get(args, 0), start=exp.Literal.number(1), length=seq_get(args, 1) 195 ), 196 } 197 198 FUNCTION_PARSERS = { 199 **parser.Parser.FUNCTION_PARSERS, # type: ignore 200 "GROUP_CONCAT": lambda self: self.expression( 201 exp.GroupConcat, 202 this=self._parse_lambda(), 203 separator=self._match(TokenType.SEPARATOR) and self._parse_field(), 204 ), 205 } 206 207 PROPERTY_PARSERS = { 208 **parser.Parser.PROPERTY_PARSERS, # type: ignore 209 "ENGINE": lambda self: self._parse_property_assignment(exp.EngineProperty), 210 } 211 212 STATEMENT_PARSERS = { 213 **parser.Parser.STATEMENT_PARSERS, # type: ignore 214 TokenType.SHOW: lambda self: self._parse_show(), 215 } 216 217 SHOW_PARSERS = { 218 "BINARY LOGS": _show_parser("BINARY LOGS"), 219 "MASTER LOGS": _show_parser("BINARY LOGS"), 220 "BINLOG EVENTS": _show_parser("BINLOG EVENTS"), 221 "CHARACTER SET": _show_parser("CHARACTER SET"), 222 "CHARSET": _show_parser("CHARACTER SET"), 223 "COLLATION": _show_parser("COLLATION"), 224 "FULL COLUMNS": _show_parser("COLUMNS", target="FROM", full=True), 225 "COLUMNS": _show_parser("COLUMNS", target="FROM"), 226 "CREATE DATABASE": _show_parser("CREATE DATABASE", target=True), 227 "CREATE EVENT": _show_parser("CREATE EVENT", target=True), 228 "CREATE FUNCTION": _show_parser("CREATE FUNCTION", target=True), 229 "CREATE PROCEDURE": _show_parser("CREATE PROCEDURE", target=True), 230 "CREATE TABLE": _show_parser("CREATE TABLE", target=True), 231 "CREATE TRIGGER": _show_parser("CREATE TRIGGER", target=True), 232 "CREATE VIEW": _show_parser("CREATE VIEW", target=True), 233 "DATABASES": _show_parser("DATABASES"), 234 "ENGINE": _show_parser("ENGINE", target=True), 235 "STORAGE ENGINES": _show_parser("ENGINES"), 236 "ENGINES": _show_parser("ENGINES"), 237 "ERRORS": _show_parser("ERRORS"), 238 "EVENTS": _show_parser("EVENTS"), 239 "FUNCTION CODE": _show_parser("FUNCTION CODE", target=True), 240 "FUNCTION STATUS": _show_parser("FUNCTION STATUS"), 241 "GRANTS": _show_parser("GRANTS", target="FOR"), 242 "INDEX": _show_parser("INDEX", target="FROM"), 243 "MASTER STATUS": _show_parser("MASTER STATUS"), 244 "OPEN TABLES": _show_parser("OPEN TABLES"), 245 "PLUGINS": _show_parser("PLUGINS"), 246 "PROCEDURE CODE": _show_parser("PROCEDURE CODE", target=True), 247 "PROCEDURE STATUS": _show_parser("PROCEDURE STATUS"), 248 "PRIVILEGES": _show_parser("PRIVILEGES"), 249 "FULL PROCESSLIST": _show_parser("PROCESSLIST", full=True), 250 "PROCESSLIST": _show_parser("PROCESSLIST"), 251 "PROFILE": _show_parser("PROFILE"), 252 "PROFILES": _show_parser("PROFILES"), 253 "RELAYLOG EVENTS": _show_parser("RELAYLOG EVENTS"), 254 "REPLICAS": _show_parser("REPLICAS"), 255 "SLAVE HOSTS": _show_parser("REPLICAS"), 256 "REPLICA STATUS": _show_parser("REPLICA STATUS"), 257 "SLAVE STATUS": _show_parser("REPLICA STATUS"), 258 "GLOBAL STATUS": _show_parser("STATUS", global_=True), 259 "SESSION STATUS": _show_parser("STATUS"), 260 "STATUS": _show_parser("STATUS"), 261 "TABLE STATUS": _show_parser("TABLE STATUS"), 262 "FULL TABLES": _show_parser("TABLES", full=True), 263 "TABLES": _show_parser("TABLES"), 264 "TRIGGERS": _show_parser("TRIGGERS"), 265 "GLOBAL VARIABLES": _show_parser("VARIABLES", global_=True), 266 "SESSION VARIABLES": _show_parser("VARIABLES"), 267 "VARIABLES": _show_parser("VARIABLES"), 268 "WARNINGS": _show_parser("WARNINGS"), 269 } 270 271 SET_PARSERS = { 272 **parser.Parser.SET_PARSERS, 273 "PERSIST": lambda self: self._parse_set_item_assignment("PERSIST"), 274 "PERSIST_ONLY": lambda self: self._parse_set_item_assignment("PERSIST_ONLY"), 275 "CHARACTER SET": lambda self: self._parse_set_item_charset("CHARACTER SET"), 276 "CHARSET": lambda self: self._parse_set_item_charset("CHARACTER SET"), 277 "NAMES": lambda self: self._parse_set_item_names(), 278 } 279 280 PROFILE_TYPES = { 281 "ALL", 282 "BLOCK IO", 283 "CONTEXT SWITCHES", 284 "CPU", 285 "IPC", 286 "MEMORY", 287 "PAGE FAULTS", 288 "SOURCE", 289 "SWAPS", 290 } 291 292 def _parse_show_mysql(self, this, target=False, full=None, global_=None): 293 if target: 294 if isinstance(target, str): 295 self._match_text_seq(target) 296 target_id = self._parse_id_var() 297 else: 298 target_id = None 299 300 log = self._parse_string() if self._match_text_seq("IN") else None 301 302 if this in {"BINLOG EVENTS", "RELAYLOG EVENTS"}: 303 position = self._parse_number() if self._match_text_seq("FROM") else None 304 db = None 305 else: 306 position = None 307 db = self._parse_id_var() if self._match_text_seq("FROM") else None 308 309 channel = self._parse_id_var() if self._match_text_seq("FOR", "CHANNEL") else None 310 311 like = self._parse_string() if self._match_text_seq("LIKE") else None 312 where = self._parse_where() 313 314 if this == "PROFILE": 315 types = self._parse_csv(lambda: self._parse_var_from_options(self.PROFILE_TYPES)) 316 query = self._parse_number() if self._match_text_seq("FOR", "QUERY") else None 317 offset = self._parse_number() if self._match_text_seq("OFFSET") else None 318 limit = self._parse_number() if self._match_text_seq("LIMIT") else None 319 else: 320 types, query = None, None 321 offset, limit = self._parse_oldstyle_limit() 322 323 mutex = True if self._match_text_seq("MUTEX") else None 324 mutex = False if self._match_text_seq("STATUS") else mutex 325 326 return self.expression( 327 exp.Show, 328 this=this, 329 target=target_id, 330 full=full, 331 log=log, 332 position=position, 333 db=db, 334 channel=channel, 335 like=like, 336 where=where, 337 types=types, 338 query=query, 339 offset=offset, 340 limit=limit, 341 mutex=mutex, 342 **{"global": global_}, 343 ) 344 345 def _parse_oldstyle_limit(self): 346 limit = None 347 offset = None 348 if self._match_text_seq("LIMIT"): 349 parts = self._parse_csv(self._parse_number) 350 if len(parts) == 1: 351 limit = parts[0] 352 elif len(parts) == 2: 353 limit = parts[1] 354 offset = parts[0] 355 return offset, limit 356 357 def _parse_set_item_charset(self, kind): 358 this = self._parse_string() or self._parse_id_var() 359 360 return self.expression( 361 exp.SetItem, 362 this=this, 363 kind=kind, 364 ) 365 366 def _parse_set_item_names(self): 367 charset = self._parse_string() or self._parse_id_var() 368 if self._match_text_seq("COLLATE"): 369 collate = self._parse_string() or self._parse_id_var() 370 else: 371 collate = None 372 return self.expression( 373 exp.SetItem, 374 this=charset, 375 collate=collate, 376 kind="NAMES", 377 ) 378 379 class Generator(generator.Generator): 380 LOCKING_READS_SUPPORTED = True 381 NULL_ORDERING_SUPPORTED = False 382 383 TRANSFORMS = { 384 **generator.Generator.TRANSFORMS, # type: ignore 385 exp.CurrentDate: no_paren_current_date_sql, 386 exp.CurrentTimestamp: lambda *_: "CURRENT_TIMESTAMP", 387 exp.ILike: no_ilike_sql, 388 exp.Min: min_or_least, 389 exp.TableSample: no_tablesample_sql, 390 exp.TryCast: no_trycast_sql, 391 exp.DateAdd: _date_add_sql("ADD"), 392 exp.DateDiff: lambda self, e: f"DATEDIFF({self.format_args(e.this, e.expression)})", 393 exp.DateSub: _date_add_sql("SUB"), 394 exp.DateTrunc: _date_trunc_sql, 395 exp.DayOfWeek: rename_func("DAYOFWEEK"), 396 exp.DayOfMonth: rename_func("DAYOFMONTH"), 397 exp.DayOfYear: rename_func("DAYOFYEAR"), 398 exp.WeekOfYear: rename_func("WEEKOFYEAR"), 399 exp.GroupConcat: lambda self, e: f"""GROUP_CONCAT({self.sql(e, "this")} SEPARATOR {self.sql(e, "separator") or "','"})""", 400 exp.StrToDate: _str_to_date_sql, 401 exp.StrToTime: _str_to_date_sql, 402 exp.Trim: _trim_sql, 403 exp.NullSafeEQ: lambda self, e: self.binary(e, "<=>"), 404 exp.NullSafeNEQ: lambda self, e: self.not_sql(self.binary(e, "<=>")), 405 exp.StrPosition: strposition_to_locate_sql, 406 } 407 408 TYPE_MAPPING = generator.Generator.TYPE_MAPPING.copy() 409 TYPE_MAPPING.pop(exp.DataType.Type.MEDIUMTEXT) 410 TYPE_MAPPING.pop(exp.DataType.Type.LONGTEXT) 411 TYPE_MAPPING.pop(exp.DataType.Type.MEDIUMBLOB) 412 TYPE_MAPPING.pop(exp.DataType.Type.LONGBLOB) 413 414 PROPERTIES_LOCATION = { 415 **generator.Generator.PROPERTIES_LOCATION, # type: ignore 416 exp.TransientProperty: exp.Properties.Location.UNSUPPORTED, 417 } 418 419 def show_sql(self, expression): 420 this = f" {expression.name}" 421 full = " FULL" if expression.args.get("full") else "" 422 global_ = " GLOBAL" if expression.args.get("global") else "" 423 424 target = self.sql(expression, "target") 425 target = f" {target}" if target else "" 426 if expression.name in {"COLUMNS", "INDEX"}: 427 target = f" FROM{target}" 428 elif expression.name == "GRANTS": 429 target = f" FOR{target}" 430 431 db = self._prefixed_sql("FROM", expression, "db") 432 433 like = self._prefixed_sql("LIKE", expression, "like") 434 where = self.sql(expression, "where") 435 436 types = self.expressions(expression, key="types") 437 types = f" {types}" if types else types 438 query = self._prefixed_sql("FOR QUERY", expression, "query") 439 440 if expression.name == "PROFILE": 441 offset = self._prefixed_sql("OFFSET", expression, "offset") 442 limit = self._prefixed_sql("LIMIT", expression, "limit") 443 else: 444 offset = "" 445 limit = self._oldstyle_limit_sql(expression) 446 447 log = self._prefixed_sql("IN", expression, "log") 448 position = self._prefixed_sql("FROM", expression, "position") 449 450 channel = self._prefixed_sql("FOR CHANNEL", expression, "channel") 451 452 if expression.name == "ENGINE": 453 mutex_or_status = " MUTEX" if expression.args.get("mutex") else " STATUS" 454 else: 455 mutex_or_status = "" 456 457 return f"SHOW{full}{global_}{this}{target}{types}{db}{query}{log}{position}{channel}{mutex_or_status}{like}{where}{offset}{limit}" 458 459 def _prefixed_sql(self, prefix, expression, arg): 460 sql = self.sql(expression, arg) 461 if not sql: 462 return "" 463 return f" {prefix} {sql}" 464 465 def _oldstyle_limit_sql(self, expression): 466 limit = self.sql(expression, "limit") 467 offset = self.sql(expression, "offset") 468 if limit: 469 limit_offset = f"{offset}, {limit}" if offset else limit 470 return f" LIMIT {limit_offset}" 471 return ""
119 class Tokenizer(tokens.Tokenizer): 120 QUOTES = ["'", '"'] 121 COMMENTS = ["--", "#", ("/*", "*/")] 122 IDENTIFIERS = ["`"] 123 STRING_ESCAPES = ["'", "\\"] 124 BIT_STRINGS = [("b'", "'"), ("B'", "'"), ("0b", "")] 125 HEX_STRINGS = [("x'", "'"), ("X'", "'"), ("0x", "")] 126 127 KEYWORDS = { 128 **tokens.Tokenizer.KEYWORDS, 129 "MEDIUMTEXT": TokenType.MEDIUMTEXT, 130 "LONGTEXT": TokenType.LONGTEXT, 131 "MEDIUMBLOB": TokenType.MEDIUMBLOB, 132 "LONGBLOB": TokenType.LONGBLOB, 133 "START": TokenType.BEGIN, 134 "SEPARATOR": TokenType.SEPARATOR, 135 "_ARMSCII8": TokenType.INTRODUCER, 136 "_ASCII": TokenType.INTRODUCER, 137 "_BIG5": TokenType.INTRODUCER, 138 "_BINARY": TokenType.INTRODUCER, 139 "_CP1250": TokenType.INTRODUCER, 140 "_CP1251": TokenType.INTRODUCER, 141 "_CP1256": TokenType.INTRODUCER, 142 "_CP1257": TokenType.INTRODUCER, 143 "_CP850": TokenType.INTRODUCER, 144 "_CP852": TokenType.INTRODUCER, 145 "_CP866": TokenType.INTRODUCER, 146 "_CP932": TokenType.INTRODUCER, 147 "_DEC8": TokenType.INTRODUCER, 148 "_EUCJPMS": TokenType.INTRODUCER, 149 "_EUCKR": TokenType.INTRODUCER, 150 "_GB18030": TokenType.INTRODUCER, 151 "_GB2312": TokenType.INTRODUCER, 152 "_GBK": TokenType.INTRODUCER, 153 "_GEOSTD8": TokenType.INTRODUCER, 154 "_GREEK": TokenType.INTRODUCER, 155 "_HEBREW": TokenType.INTRODUCER, 156 "_HP8": TokenType.INTRODUCER, 157 "_KEYBCS2": TokenType.INTRODUCER, 158 "_KOI8R": TokenType.INTRODUCER, 159 "_KOI8U": TokenType.INTRODUCER, 160 "_LATIN1": TokenType.INTRODUCER, 161 "_LATIN2": TokenType.INTRODUCER, 162 "_LATIN5": TokenType.INTRODUCER, 163 "_LATIN7": TokenType.INTRODUCER, 164 "_MACCE": TokenType.INTRODUCER, 165 "_MACROMAN": TokenType.INTRODUCER, 166 "_SJIS": TokenType.INTRODUCER, 167 "_SWE7": TokenType.INTRODUCER, 168 "_TIS620": TokenType.INTRODUCER, 169 "_UCS2": TokenType.INTRODUCER, 170 "_UJIS": TokenType.INTRODUCER, 171 # https://dev.mysql.com/doc/refman/8.0/en/string-literals.html 172 "_UTF8": TokenType.INTRODUCER, 173 "_UTF16": TokenType.INTRODUCER, 174 "_UTF16LE": TokenType.INTRODUCER, 175 "_UTF32": TokenType.INTRODUCER, 176 "_UTF8MB3": TokenType.INTRODUCER, 177 "_UTF8MB4": TokenType.INTRODUCER, 178 "@@": TokenType.SESSION_PARAMETER, 179 } 180 181 COMMANDS = tokens.Tokenizer.COMMANDS - {TokenType.SHOW}
Inherited Members
183 class Parser(parser.Parser): 184 FUNC_TOKENS = {*parser.Parser.FUNC_TOKENS, TokenType.SCHEMA, TokenType.DATABASE} # type: ignore 185 186 FUNCTIONS = { 187 **parser.Parser.FUNCTIONS, # type: ignore 188 "DATE_ADD": _date_add(exp.DateAdd), 189 "DATE_SUB": _date_add(exp.DateSub), 190 "STR_TO_DATE": _str_to_date, 191 "LOCATE": locate_to_strposition, 192 "INSTR": lambda args: exp.StrPosition(substr=seq_get(args, 1), this=seq_get(args, 0)), 193 "LEFT": lambda args: exp.Substring( 194 this=seq_get(args, 0), start=exp.Literal.number(1), length=seq_get(args, 1) 195 ), 196 } 197 198 FUNCTION_PARSERS = { 199 **parser.Parser.FUNCTION_PARSERS, # type: ignore 200 "GROUP_CONCAT": lambda self: self.expression( 201 exp.GroupConcat, 202 this=self._parse_lambda(), 203 separator=self._match(TokenType.SEPARATOR) and self._parse_field(), 204 ), 205 } 206 207 PROPERTY_PARSERS = { 208 **parser.Parser.PROPERTY_PARSERS, # type: ignore 209 "ENGINE": lambda self: self._parse_property_assignment(exp.EngineProperty), 210 } 211 212 STATEMENT_PARSERS = { 213 **parser.Parser.STATEMENT_PARSERS, # type: ignore 214 TokenType.SHOW: lambda self: self._parse_show(), 215 } 216 217 SHOW_PARSERS = { 218 "BINARY LOGS": _show_parser("BINARY LOGS"), 219 "MASTER LOGS": _show_parser("BINARY LOGS"), 220 "BINLOG EVENTS": _show_parser("BINLOG EVENTS"), 221 "CHARACTER SET": _show_parser("CHARACTER SET"), 222 "CHARSET": _show_parser("CHARACTER SET"), 223 "COLLATION": _show_parser("COLLATION"), 224 "FULL COLUMNS": _show_parser("COLUMNS", target="FROM", full=True), 225 "COLUMNS": _show_parser("COLUMNS", target="FROM"), 226 "CREATE DATABASE": _show_parser("CREATE DATABASE", target=True), 227 "CREATE EVENT": _show_parser("CREATE EVENT", target=True), 228 "CREATE FUNCTION": _show_parser("CREATE FUNCTION", target=True), 229 "CREATE PROCEDURE": _show_parser("CREATE PROCEDURE", target=True), 230 "CREATE TABLE": _show_parser("CREATE TABLE", target=True), 231 "CREATE TRIGGER": _show_parser("CREATE TRIGGER", target=True), 232 "CREATE VIEW": _show_parser("CREATE VIEW", target=True), 233 "DATABASES": _show_parser("DATABASES"), 234 "ENGINE": _show_parser("ENGINE", target=True), 235 "STORAGE ENGINES": _show_parser("ENGINES"), 236 "ENGINES": _show_parser("ENGINES"), 237 "ERRORS": _show_parser("ERRORS"), 238 "EVENTS": _show_parser("EVENTS"), 239 "FUNCTION CODE": _show_parser("FUNCTION CODE", target=True), 240 "FUNCTION STATUS": _show_parser("FUNCTION STATUS"), 241 "GRANTS": _show_parser("GRANTS", target="FOR"), 242 "INDEX": _show_parser("INDEX", target="FROM"), 243 "MASTER STATUS": _show_parser("MASTER STATUS"), 244 "OPEN TABLES": _show_parser("OPEN TABLES"), 245 "PLUGINS": _show_parser("PLUGINS"), 246 "PROCEDURE CODE": _show_parser("PROCEDURE CODE", target=True), 247 "PROCEDURE STATUS": _show_parser("PROCEDURE STATUS"), 248 "PRIVILEGES": _show_parser("PRIVILEGES"), 249 "FULL PROCESSLIST": _show_parser("PROCESSLIST", full=True), 250 "PROCESSLIST": _show_parser("PROCESSLIST"), 251 "PROFILE": _show_parser("PROFILE"), 252 "PROFILES": _show_parser("PROFILES"), 253 "RELAYLOG EVENTS": _show_parser("RELAYLOG EVENTS"), 254 "REPLICAS": _show_parser("REPLICAS"), 255 "SLAVE HOSTS": _show_parser("REPLICAS"), 256 "REPLICA STATUS": _show_parser("REPLICA STATUS"), 257 "SLAVE STATUS": _show_parser("REPLICA STATUS"), 258 "GLOBAL STATUS": _show_parser("STATUS", global_=True), 259 "SESSION STATUS": _show_parser("STATUS"), 260 "STATUS": _show_parser("STATUS"), 261 "TABLE STATUS": _show_parser("TABLE STATUS"), 262 "FULL TABLES": _show_parser("TABLES", full=True), 263 "TABLES": _show_parser("TABLES"), 264 "TRIGGERS": _show_parser("TRIGGERS"), 265 "GLOBAL VARIABLES": _show_parser("VARIABLES", global_=True), 266 "SESSION VARIABLES": _show_parser("VARIABLES"), 267 "VARIABLES": _show_parser("VARIABLES"), 268 "WARNINGS": _show_parser("WARNINGS"), 269 } 270 271 SET_PARSERS = { 272 **parser.Parser.SET_PARSERS, 273 "PERSIST": lambda self: self._parse_set_item_assignment("PERSIST"), 274 "PERSIST_ONLY": lambda self: self._parse_set_item_assignment("PERSIST_ONLY"), 275 "CHARACTER SET": lambda self: self._parse_set_item_charset("CHARACTER SET"), 276 "CHARSET": lambda self: self._parse_set_item_charset("CHARACTER SET"), 277 "NAMES": lambda self: self._parse_set_item_names(), 278 } 279 280 PROFILE_TYPES = { 281 "ALL", 282 "BLOCK IO", 283 "CONTEXT SWITCHES", 284 "CPU", 285 "IPC", 286 "MEMORY", 287 "PAGE FAULTS", 288 "SOURCE", 289 "SWAPS", 290 } 291 292 def _parse_show_mysql(self, this, target=False, full=None, global_=None): 293 if target: 294 if isinstance(target, str): 295 self._match_text_seq(target) 296 target_id = self._parse_id_var() 297 else: 298 target_id = None 299 300 log = self._parse_string() if self._match_text_seq("IN") else None 301 302 if this in {"BINLOG EVENTS", "RELAYLOG EVENTS"}: 303 position = self._parse_number() if self._match_text_seq("FROM") else None 304 db = None 305 else: 306 position = None 307 db = self._parse_id_var() if self._match_text_seq("FROM") else None 308 309 channel = self._parse_id_var() if self._match_text_seq("FOR", "CHANNEL") else None 310 311 like = self._parse_string() if self._match_text_seq("LIKE") else None 312 where = self._parse_where() 313 314 if this == "PROFILE": 315 types = self._parse_csv(lambda: self._parse_var_from_options(self.PROFILE_TYPES)) 316 query = self._parse_number() if self._match_text_seq("FOR", "QUERY") else None 317 offset = self._parse_number() if self._match_text_seq("OFFSET") else None 318 limit = self._parse_number() if self._match_text_seq("LIMIT") else None 319 else: 320 types, query = None, None 321 offset, limit = self._parse_oldstyle_limit() 322 323 mutex = True if self._match_text_seq("MUTEX") else None 324 mutex = False if self._match_text_seq("STATUS") else mutex 325 326 return self.expression( 327 exp.Show, 328 this=this, 329 target=target_id, 330 full=full, 331 log=log, 332 position=position, 333 db=db, 334 channel=channel, 335 like=like, 336 where=where, 337 types=types, 338 query=query, 339 offset=offset, 340 limit=limit, 341 mutex=mutex, 342 **{"global": global_}, 343 ) 344 345 def _parse_oldstyle_limit(self): 346 limit = None 347 offset = None 348 if self._match_text_seq("LIMIT"): 349 parts = self._parse_csv(self._parse_number) 350 if len(parts) == 1: 351 limit = parts[0] 352 elif len(parts) == 2: 353 limit = parts[1] 354 offset = parts[0] 355 return offset, limit 356 357 def _parse_set_item_charset(self, kind): 358 this = self._parse_string() or self._parse_id_var() 359 360 return self.expression( 361 exp.SetItem, 362 this=this, 363 kind=kind, 364 ) 365 366 def _parse_set_item_names(self): 367 charset = self._parse_string() or self._parse_id_var() 368 if self._match_text_seq("COLLATE"): 369 collate = self._parse_string() or self._parse_id_var() 370 else: 371 collate = None 372 return self.expression( 373 exp.SetItem, 374 this=charset, 375 collate=collate, 376 kind="NAMES", 377 )
Parser consumes a list of tokens produced by the sqlglot.tokens.Tokenizer and produces
a parsed syntax tree.
Arguments:
- error_level: the desired error level. Default: ErrorLevel.RAISE
- error_message_context: determines the amount of context to capture from a query string when displaying the error message (in number of characters). Default: 50.
- index_offset: Index offset for arrays eg ARRAY[0] vs ARRAY[1] as the head of a list. Default: 0
- alias_post_tablesample: If the table alias comes after tablesample. Default: False
- max_errors: Maximum number of error messages to include in a raised ParseError. This is only relevant if error_level is ErrorLevel.RAISE. Default: 3
- null_ordering: Indicates the default null ordering method to use if not explicitly set. Options are "nulls_are_small", "nulls_are_large", "nulls_are_last". Default: "nulls_are_small"
Inherited Members
379 class Generator(generator.Generator): 380 LOCKING_READS_SUPPORTED = True 381 NULL_ORDERING_SUPPORTED = False 382 383 TRANSFORMS = { 384 **generator.Generator.TRANSFORMS, # type: ignore 385 exp.CurrentDate: no_paren_current_date_sql, 386 exp.CurrentTimestamp: lambda *_: "CURRENT_TIMESTAMP", 387 exp.ILike: no_ilike_sql, 388 exp.Min: min_or_least, 389 exp.TableSample: no_tablesample_sql, 390 exp.TryCast: no_trycast_sql, 391 exp.DateAdd: _date_add_sql("ADD"), 392 exp.DateDiff: lambda self, e: f"DATEDIFF({self.format_args(e.this, e.expression)})", 393 exp.DateSub: _date_add_sql("SUB"), 394 exp.DateTrunc: _date_trunc_sql, 395 exp.DayOfWeek: rename_func("DAYOFWEEK"), 396 exp.DayOfMonth: rename_func("DAYOFMONTH"), 397 exp.DayOfYear: rename_func("DAYOFYEAR"), 398 exp.WeekOfYear: rename_func("WEEKOFYEAR"), 399 exp.GroupConcat: lambda self, e: f"""GROUP_CONCAT({self.sql(e, "this")} SEPARATOR {self.sql(e, "separator") or "','"})""", 400 exp.StrToDate: _str_to_date_sql, 401 exp.StrToTime: _str_to_date_sql, 402 exp.Trim: _trim_sql, 403 exp.NullSafeEQ: lambda self, e: self.binary(e, "<=>"), 404 exp.NullSafeNEQ: lambda self, e: self.not_sql(self.binary(e, "<=>")), 405 exp.StrPosition: strposition_to_locate_sql, 406 } 407 408 TYPE_MAPPING = generator.Generator.TYPE_MAPPING.copy() 409 TYPE_MAPPING.pop(exp.DataType.Type.MEDIUMTEXT) 410 TYPE_MAPPING.pop(exp.DataType.Type.LONGTEXT) 411 TYPE_MAPPING.pop(exp.DataType.Type.MEDIUMBLOB) 412 TYPE_MAPPING.pop(exp.DataType.Type.LONGBLOB) 413 414 PROPERTIES_LOCATION = { 415 **generator.Generator.PROPERTIES_LOCATION, # type: ignore 416 exp.TransientProperty: exp.Properties.Location.UNSUPPORTED, 417 } 418 419 def show_sql(self, expression): 420 this = f" {expression.name}" 421 full = " FULL" if expression.args.get("full") else "" 422 global_ = " GLOBAL" if expression.args.get("global") else "" 423 424 target = self.sql(expression, "target") 425 target = f" {target}" if target else "" 426 if expression.name in {"COLUMNS", "INDEX"}: 427 target = f" FROM{target}" 428 elif expression.name == "GRANTS": 429 target = f" FOR{target}" 430 431 db = self._prefixed_sql("FROM", expression, "db") 432 433 like = self._prefixed_sql("LIKE", expression, "like") 434 where = self.sql(expression, "where") 435 436 types = self.expressions(expression, key="types") 437 types = f" {types}" if types else types 438 query = self._prefixed_sql("FOR QUERY", expression, "query") 439 440 if expression.name == "PROFILE": 441 offset = self._prefixed_sql("OFFSET", expression, "offset") 442 limit = self._prefixed_sql("LIMIT", expression, "limit") 443 else: 444 offset = "" 445 limit = self._oldstyle_limit_sql(expression) 446 447 log = self._prefixed_sql("IN", expression, "log") 448 position = self._prefixed_sql("FROM", expression, "position") 449 450 channel = self._prefixed_sql("FOR CHANNEL", expression, "channel") 451 452 if expression.name == "ENGINE": 453 mutex_or_status = " MUTEX" if expression.args.get("mutex") else " STATUS" 454 else: 455 mutex_or_status = "" 456 457 return f"SHOW{full}{global_}{this}{target}{types}{db}{query}{log}{position}{channel}{mutex_or_status}{like}{where}{offset}{limit}" 458 459 def _prefixed_sql(self, prefix, expression, arg): 460 sql = self.sql(expression, arg) 461 if not sql: 462 return "" 463 return f" {prefix} {sql}" 464 465 def _oldstyle_limit_sql(self, expression): 466 limit = self.sql(expression, "limit") 467 offset = self.sql(expression, "offset") 468 if limit: 469 limit_offset = f"{offset}, {limit}" if offset else limit 470 return f" LIMIT {limit_offset}" 471 return ""
Generator interprets the given syntax tree and produces a SQL string as an output.
Arguments:
- time_mapping (dict): the dictionary of custom time mappings in which the key represents a python time format and the output the target time format
- time_trie (trie): a trie of the time_mapping keys
- pretty (bool): if set to True the returned string will be formatted. Default: False.
- quote_start (str): specifies which starting character to use to delimit quotes. Default: '.
- quote_end (str): specifies which ending character to use to delimit quotes. Default: '.
- identifier_start (str): specifies which starting character to use to delimit identifiers. Default: ".
- identifier_end (str): specifies which ending character to use to delimit identifiers. Default: ".
- identify (bool | str): 'always': always quote, 'safe': quote identifiers if they don't contain an upcase, True defaults to always.
- normalize (bool): if set to True all identifiers will lower cased
- string_escape (str): specifies a string escape character. Default: '.
- identifier_escape (str): specifies an identifier escape character. Default: ".
- pad (int): determines padding in a formatted string. Default: 2.
- indent (int): determines the size of indentation in a formatted string. Default: 4.
- unnest_column_only (bool): if true unnest table aliases are considered only as column aliases
- normalize_functions (str): normalize function names, "upper", "lower", or None Default: "upper"
- alias_post_tablesample (bool): if the table alias comes after tablesample Default: False
- unsupported_level (ErrorLevel): determines the generator's behavior when it encounters unsupported expressions. Default ErrorLevel.WARN.
- null_ordering (str): Indicates the default null ordering method to use if not explicitly set. Options are "nulls_are_small", "nulls_are_large", "nulls_are_last". Default: "nulls_are_small"
- max_unsupported (int): Maximum number of unsupported messages to include in a raised UnsupportedError. This is only relevant if unsupported_level is ErrorLevel.RAISE. Default: 3
- leading_comma (bool): if the the comma is leading or trailing in select statements Default: False
- max_text_width: The max number of characters in a segment before creating new lines in pretty mode. The default is on the smaller end because the length only represents a segment and not the true line length. Default: 80
- comments: Whether or not to preserve comments in the output SQL code. Default: True
def
show_sql(self, expression):
419 def show_sql(self, expression): 420 this = f" {expression.name}" 421 full = " FULL" if expression.args.get("full") else "" 422 global_ = " GLOBAL" if expression.args.get("global") else "" 423 424 target = self.sql(expression, "target") 425 target = f" {target}" if target else "" 426 if expression.name in {"COLUMNS", "INDEX"}: 427 target = f" FROM{target}" 428 elif expression.name == "GRANTS": 429 target = f" FOR{target}" 430 431 db = self._prefixed_sql("FROM", expression, "db") 432 433 like = self._prefixed_sql("LIKE", expression, "like") 434 where = self.sql(expression, "where") 435 436 types = self.expressions(expression, key="types") 437 types = f" {types}" if types else types 438 query = self._prefixed_sql("FOR QUERY", expression, "query") 439 440 if expression.name == "PROFILE": 441 offset = self._prefixed_sql("OFFSET", expression, "offset") 442 limit = self._prefixed_sql("LIMIT", expression, "limit") 443 else: 444 offset = "" 445 limit = self._oldstyle_limit_sql(expression) 446 447 log = self._prefixed_sql("IN", expression, "log") 448 position = self._prefixed_sql("FROM", expression, "position") 449 450 channel = self._prefixed_sql("FOR CHANNEL", expression, "channel") 451 452 if expression.name == "ENGINE": 453 mutex_or_status = " MUTEX" if expression.args.get("mutex") else " STATUS" 454 else: 455 mutex_or_status = "" 456 457 return f"SHOW{full}{global_}{this}{target}{types}{db}{query}{log}{position}{channel}{mutex_or_status}{like}{where}{offset}{limit}"
Inherited Members
- sqlglot.generator.Generator
- Generator
- generate
- unsupported
- sep
- seg
- pad_comment
- maybe_comment
- wrap
- no_identify
- normalize_func
- indent
- sql
- uncache_sql
- cache_sql
- characterset_sql
- column_sql
- columndef_sql
- columnconstraint_sql
- autoincrementcolumnconstraint_sql
- compresscolumnconstraint_sql
- generatedasidentitycolumnconstraint_sql
- notnullcolumnconstraint_sql
- primarykeycolumnconstraint_sql
- uniquecolumnconstraint_sql
- create_sql
- describe_sql
- prepend_ctes
- with_sql
- cte_sql
- tablealias_sql
- bitstring_sql
- hexstring_sql
- datatype_sql
- directory_sql
- delete_sql
- drop_sql
- except_sql
- except_op
- fetch_sql
- filter_sql
- hint_sql
- index_sql
- identifier_sql
- national_sql
- partition_sql
- properties_sql
- root_properties
- properties
- with_properties
- locate_properties
- property_sql
- likeproperty_sql
- fallbackproperty_sql
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