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token.go
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/*
* Copyright 2018 Xiaomi, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ast
import (
"fmt"
"regexp"
"strings"
"unicode"
"vitess.io/vitess/go/vt/sqlparser"
)
// TokenType
const (
TokenTypeWhitespace = 0
TokenTypeWord = 1
TokenTypeQuote = 2
TokenTypeBacktickQuote = 3
TokenTypeReserved = 4
TokenTypeReservedToplevel = 5
TokenTypeReservedNewline = 6
TokenTypeBoundary = 7
TokenTypeComment = 8
TokenTypeBlockComment = 9
TokenTypeNumber = 10
TokenTypeError = 11
TokenTypeVariable = 12
)
var maxCachekeySize = 15
var cacheHits int
var cacheMisses int
var tokenBoundaries = []string{
// multi character
"(>=)", "(<=)", "(!=)", "(<>)",
// single characters
",", ";", ":", "\\)", "\\(", "\\.", "=", "<", ">", "\\+", "-", "\\*", "/", "!", "\\^", "%", "\\|", "&", "#",
}
var tokenReserved = []string{
"ACCESSIBLE", "ACTION", "AGAINST", "AGGREGATE", "ALGORITHM", "ALL", "ALTER", "ANALYSE", "ANALYZE", "AS", "ASC",
"AUTOCOMMIT", "AUTO_INCREMENT", "BACKUP", "BEGIN", "BETWEEN", "BINLOG", "BOTH", "CASCADE", "CASE", "CHANGE", "CHANGED", "CHARACTER SET",
"CHARSET", "CHECK", "CHECKSUM", "COLLATE", "COLLATION", "COLUMN", "COLUMNS", "COMMENT", "COMMIT", "COMMITTED", "COMPRESSED", "CONCURRENT",
"CONSTRAINT", "CONTAINS", "CONVERT", "CREATE", "CROSS", "CURRENT_TIMESTAMP", "DATABASE", "DATABASES", "DAY", "DAY_HOUR", "DAY_MINUTE",
"DAY_SECOND", "DEFAULT", "DEFINER", "DELAYED", "DELETE", "DESC", "DESCRIBE", "DETERMINISTIC", "DISTINCT", "DISTINCTROW", "DIV",
"DO", "DUMPFILE", "DUPLICATE", "DYNAMIC", "ELSE", "ENCLOSED", "END", "ENGINE", "ENGINE_TYPE", "ENGINES", "ESCAPE", "ESCAPED", "EVENTS", "EXEC",
"EXECUTE", "EXISTS", "EXPLAIN", "EXTENDED", "FAST", "FIELDS", "FILE", "FIRST", "FIXED", "FLUSH", "FOR", "FORCE", "FOREIGN", "FULL", "FULLTEXT",
"FUNCTION", "GLOBAL", "GRANT", "GRANTS", "GROUP_CONCAT", "HEAP", "HIGH_PRIORITY", "HOSTS", "HOUR", "HOUR_MINUTE",
"HOUR_SECOND", "IDENTIFIED", "IF", "IFNULL", "IGNORE", "IN", "INDEX", "INDEXES", "INFILE", "INSERT", "INSERT_ID", "INSERT_METHOD", "INTERVAL",
"INTO", "INVOKER", "IS", "ISOLATION", "KEY", "KEYS", "KILL", "LAST_INSERT_ID", "LEADING", "LEVEL", "LIKE", "LINEAR",
"LINES", "LOAD", "LOCAL", "LOCK", "LOCKS", "LOGS", "LOW_PRIORITY", "MARIA", "MASTER", "MASTER_CONNECT_RETRY", "MASTER_HOST", "MASTER_LOG_FILE",
"MATCH", "MAX_CONNECTIONS_PER_HOUR", "MAX_QUERIES_PER_HOUR", "MAX_ROWS", "MAX_UPDATES_PER_HOUR", "MAX_USER_CONNECTIONS",
"MEDIUM", "MERGE", "MINUTE", "MINUTE_SECOND", "MIN_ROWS", "MODE", "MODIFY",
"MONTH", "MRG_MYISAM", "MYISAM", "NAMES", "NATURAL", "NOT", "NOW()", "NULL", "OFFSET", "ON", "OPEN", "OPTIMIZE", "OPTION", "OPTIONALLY",
"ON UPDATE", "ON DELETE", "OUTFILE", "PACK_KEYS", "PAGE", "PARTIAL", "PARTITION", "PARTITIONS", "PASSWORD", "PRIMARY", "PRIVILEGES", "PROCEDURE",
"PROCESS", "PROCESSLIST", "PURGE", "QUICK", "RANGE", "RAID0", "RAID_CHUNKS", "RAID_CHUNKSIZE", "RAID_TYPE", "READ", "READ_ONLY",
"READ_WRITE", "REFERENCES", "REGEXP", "RELOAD", "RENAME", "REPAIR", "REPEATABLE", "REPLACE", "REPLICATION", "RESET", "RESTORE", "RESTRICT",
"RETURN", "RETURNS", "REVOKE", "RLIKE", "ROLLBACK", "ROW", "ROWS", "ROW_FORMAT", "SECOND", "SECURITY", "SEPARATOR",
"SERIALIZABLE", "SESSION", "SHARE", "SHOW", "SHUTDOWN", "SLAVE", "SONAME", "SOUNDS", "SQL", "SQL_AUTO_IS_NULL", "SQL_BIG_RESULT",
"SQL_BIG_SELECTS", "SQL_BIG_TABLES", "SQL_BUFFER_RESULT", "SQL_CALC_FOUND_ROWS", "SQL_LOG_BIN", "SQL_LOG_OFF", "SQL_LOG_UPDATE",
"SQL_LOW_PRIORITY_UPDATES", "SQL_MAX_JOIN_SIZE", "SQL_QUOTE_SHOW_CREATE", "SQL_SAFE_UPDATES", "SQL_SELECT_LIMIT", "SQL_SLAVE_SKIP_COUNTER",
"SQL_SMALL_RESULT", "SQL_WARNINGS", "SQL_CACHE", "SQL_NO_CACHE", "START", "STARTING", "STATUS", "STOP", "STORAGE",
"STRAIGHT_JOIN", "STRING", "STRIPED", "SUPER", "TABLE", "TABLES", "TEMPORARY", "TERMINATED", "THEN", "TO", "TRAILING", "TRANSACTIONAL", "TRUE",
"TRUNCATE", "TYPE", "TYPES", "UNCOMMITTED", "UNIQUE", "UNLOCK", "UNSIGNED", "USAGE", "USE", "USING", "VARIABLES",
"VIEW", "WHEN", "WITH", "WORK", "WRITE", "YEAR_MONTH",
}
var tokenReservedTopLevel = []string{
"SELECT", "FROM", "WHERE", "SET", "ORDER BY", "GROUP BY", "LIMIT", "DROP",
"VALUES", "UPDATE", "HAVING", "ADD", "AFTER", "ALTER TABLE", "DELETE FROM", "UNION ALL", "UNION", "EXCEPT", "INTERSECT",
}
var tokenFunction = []string{
"ABS", "ACOS", "ADDDATE", "ADDTIME", "AES_DECRYPT", "AES_ENCRYPT", "AREA", "ASBINARY", "ASCII", "ASIN", "ASTEXT", "ATAN", "ATAN2",
"AVG", "BDMPOLYFROMTEXT", "BDMPOLYFROMWKB", "BDPOLYFROMTEXT", "BDPOLYFROMWKB", "BENCHMARK", "BIN", "BIT_AND", "BIT_COUNT", "BIT_LENGTH",
"BIT_OR", "BIT_XOR", "BOUNDARY", "BUFFER", "CAST", "CEIL", "CEILING", "CENTROID", "CHAR", "CHARACTER_LENGTH", "CHARSET", "CHAR_LENGTH",
"COALESCE", "COERCIBILITY", "COLLATION", "COMPRESS", "CONCAT", "CONCAT_WS", "CONNECTION_ID", "CONTAINS", "CONV", "CONVERT", "CONVERT_TZ",
"CONVEXHULL", "COS", "COT", "COUNT", "CRC32", "CROSSES", "CURDATE", "CURRENT_DATE", "CURRENT_TIME", "CURRENT_TIMESTAMP", "CURRENT_USER",
"CURTIME", "DATABASE", "DATE", "DATEDIFF", "DATE_ADD", "DATE_DIFF", "DATE_FORMAT", "DATE_SUB", "DAY", "DAYNAME", "DAYOFMONTH", "DAYOFWEEK",
"DAYOFYEAR", "DECODE", "DEFAULT", "DEGREES", "DES_DECRYPT", "DES_ENCRYPT", "DIFFERENCE", "DIMENSION", "DISJOINT", "DISTANCE", "ELT", "ENCODE",
"ENCRYPT", "ENDPOINT", "ENVELOPE", "EQUALS", "EXP", "EXPORT_SET", "EXTERIORRING", "EXTRACT", "EXTRACTVALUE", "FIELD", "FIND_IN_SET", "FLOOR",
"FORMAT", "FOUND_ROWS", "FROM_DAYS", "FROM_UNIXTIME", "GEOMCOLLFROMTEXT", "GEOMCOLLFROMWKB", "GEOMETRYCOLLECTION", "GEOMETRYCOLLECTIONFROMTEXT",
"GEOMETRYCOLLECTIONFROMWKB", "GEOMETRYFROMTEXT", "GEOMETRYFROMWKB", "GEOMETRYN", "GEOMETRYTYPE", "GEOMFROMTEXT", "GEOMFROMWKB", "GET_FORMAT",
"GET_LOCK", "GLENGTH", "GREATEST", "GROUP_CONCAT", "GROUP_UNIQUE_USERS", "HEX", "HOUR", "IF", "IFNULL", "INET_ATON", "INET_NTOA", "INSERT", "INSTR",
"INTERIORRINGN", "INTERSECTION", "INTERSECTS", "INTERVAL", "ISCLOSED", "ISEMPTY", "ISNULL", "ISRING", "ISSIMPLE", "IS_FREE_LOCK", "IS_USED_LOCK",
"LAST_DAY", "LAST_INSERT_ID", "LCASE", "LEAST", "LEFT", "LENGTH", "LINEFROMTEXT", "LINEFROMWKB", "LINESTRING", "LINESTRINGFROMTEXT", "LINESTRINGFROMWKB",
"LN", "LOAD_FILE", "LOCALTIME", "LOCALTIMESTAMP", "LOCATE", "LOG", "LOG10", "LOG2", "LOWER", "LPAD", "LTRIM", "MAKEDATE", "MAKETIME", "MAKE_SET",
"MASTER_POS_WAIT", "MAX", "MBRCONTAINS", "MBRDISJOINT", "MBREQUAL", "MBRINTERSECTS", "MBROVERLAPS", "MBRTOUCHES", "MBRWITHIN", "MD5", "MICROSECOND",
"MID", "MIN", "MINUTE", "MLINEFROMTEXT", "MLINEFROMWKB", "MOD", "MONTH", "MONTHNAME", "MPOINTFROMTEXT", "MPOINTFROMWKB", "MPOLYFROMTEXT", "MPOLYFROMWKB",
"MULTILINESTRING", "MULTILINESTRINGFROMTEXT", "MULTILINESTRINGFROMWKB", "MULTIPOINT", "MULTIPOINTFROMTEXT", "MULTIPOINTFROMWKB", "MULTIPOLYGON",
"MULTIPOLYGONFROMTEXT", "MULTIPOLYGONFROMWKB", "NAME_CONST", "NULLIF", "NUMGEOMETRIES", "NUMINTERIORRINGS", "NUMPOINTS", "OCT", "OCTET_LENGTH",
"OLD_PASSWORD", "ORD", "OVERLAPS", "PASSWORD", "PERIOD_ADD", "PERIOD_DIFF", "PI", "POINT", "POINTFROMTEXT", "POINTFROMWKB", "POINTN", "POINTONSURFACE",
"POLYFROMTEXT", "POLYFROMWKB", "POLYGON", "POLYGONFROMTEXT", "POLYGONFROMWKB", "POSITION", "POW", "POWER", "QUARTER", "QUOTE", "RADIANS", "RAND",
"RELATED", "RELEASE_LOCK", "REPEAT", "REPLACE", "REVERSE", "RIGHT", "ROUND", "ROW_COUNT", "RPAD", "RTRIM", "SCHEMA", "SECOND", "SEC_TO_TIME",
"SESSION_USER", "SHA", "SHA1", "SIGN", "SIN", "SLEEP", "SOUNDEX", "SPACE", "SQRT", "SRID", "STARTPOINT", "STD", "STDDEV", "STDDEV_POP", "STDDEV_SAMP",
"STRCMP", "STR_TO_DATE", "SUBDATE", "SUBSTR", "SUBSTRING", "SUBSTRING_INDEX", "SUBTIME", "SUM", "SYMDIFFERENCE", "SYSDATE", "SYSTEM_USER", "TAN",
"TIME", "TIMEDIFF", "TIMESTAMP", "TIMESTAMPADD", "TIMESTAMPDIFF", "TIME_FORMAT", "TIME_TO_SEC", "TOUCHES", "TO_DAYS", "TRIM", "TRUNCATE", "UCASE",
"UNCOMPRESS", "UNCOMPRESSED_LENGTH", "UNHEX", "UNIQUE_USERS", "UNIX_TIMESTAMP", "UPDATEXML", "UPPER", "USER", "UTC_DATE", "UTC_TIME", "UTC_TIMESTAMP",
"UUID", "VARIANCE", "VAR_POP", "VAR_SAMP", "VERSION", "WEEK", "WEEKDAY", "WEEKOFYEAR", "WITHIN", "X", "Y", "YEAR", "YEARWEEK",
}
var tokenReservedNewLine = []string{
"LEFT OUTER JOIN", "RIGHT OUTER JOIN", "LEFT JOIN", "RIGHT JOIN", "OUTER JOIN", "INNER JOIN", "JOIN", "XOR", "OR", "AND",
}
var regBoundariesString string
var regReservedToplevelString string
var regReservedNewlineString string
var regReservedString string
var regFunctionString string
func init() {
var regs []string
regs = append(regs, tokenBoundaries...)
regBoundariesString = "(" + strings.Join(regs, "|") + ")"
regs = make([]string, 0)
for _, reg := range tokenReservedTopLevel {
regs = append(regs, regexp.QuoteMeta(reg))
}
regReservedToplevelString = "(" + strings.Join(regs, "|") + ")"
regs = make([]string, 0)
for _, reg := range tokenReservedNewLine {
regs = append(regs, regexp.QuoteMeta(reg))
}
regReservedNewlineString = "(" + strings.Join(regs, "|") + ")"
regs = make([]string, 0)
for _, reg := range tokenReserved {
regs = append(regs, regexp.QuoteMeta(reg))
}
regReservedString = "(" + strings.Join(regs, "|") + ")"
regs = make([]string, 0)
for _, reg := range tokenFunction {
regs = append(regs, regexp.QuoteMeta(reg))
}
regFunctionString = "(" + strings.Join(regs, "|") + ")"
}
// TokenString sqlparser tokens
var TokenString = map[int]string{
sqlparser.LEX_ERROR: "",
sqlparser.UNION: "union",
sqlparser.SELECT: "select",
sqlparser.STREAM: "stream",
sqlparser.INSERT: "insert",
sqlparser.UPDATE: "update",
sqlparser.DELETE: "delete",
sqlparser.FROM: "from",
sqlparser.WHERE: "where",
sqlparser.GROUP: "group",
sqlparser.HAVING: "having",
sqlparser.ORDER: "order",
sqlparser.BY: "by",
sqlparser.LIMIT: "limit",
sqlparser.OFFSET: "offset",
sqlparser.FOR: "for",
sqlparser.ALL: "all",
sqlparser.DISTINCT: "distinct",
sqlparser.AS: "as",
sqlparser.EXISTS: "exists",
sqlparser.ASC: "asc",
sqlparser.DESC: "desc",
sqlparser.INTO: "into",
sqlparser.DUPLICATE: "duplicate",
sqlparser.KEY: "key",
sqlparser.DEFAULT: "default",
sqlparser.SET: "set",
sqlparser.LOCK: "lock",
sqlparser.KEYS: "keys",
sqlparser.VALUES: "values",
sqlparser.LAST_INSERT_ID: "last_insert_id",
sqlparser.NEXT: "next",
sqlparser.VALUE: "value",
sqlparser.SHARE: "share",
sqlparser.MODE: "mode",
sqlparser.SQL_NO_CACHE: "sql_no_cache",
sqlparser.SQL_CACHE: "sql_cache",
sqlparser.JOIN: "join",
sqlparser.STRAIGHT_JOIN: "straight_join",
sqlparser.LEFT: "left",
sqlparser.RIGHT: "right",
sqlparser.INNER: "inner",
sqlparser.OUTER: "outer",
sqlparser.CROSS: "cross",
sqlparser.NATURAL: "natural",
sqlparser.USE: "use",
sqlparser.FORCE: "force",
sqlparser.ON: "on",
sqlparser.USING: "using",
sqlparser.ID: "id",
sqlparser.HEX: "hex",
sqlparser.STRING: "string",
sqlparser.INTEGRAL: "integral",
sqlparser.FLOAT: "float",
sqlparser.HEXNUM: "hexnum",
sqlparser.VALUE_ARG: "?",
sqlparser.LIST_ARG: ":",
sqlparser.COMMENT: "",
sqlparser.COMMENT_KEYWORD: "comment",
sqlparser.BIT_LITERAL: "bit_literal",
sqlparser.NULL: "null",
sqlparser.TRUE: "true",
sqlparser.FALSE: "false",
sqlparser.OR: "||",
sqlparser.AND: "&&",
sqlparser.NOT: "not",
sqlparser.BETWEEN: "between",
sqlparser.CASE: "case",
sqlparser.WHEN: "when",
sqlparser.THEN: "then",
sqlparser.ELSE: "else",
sqlparser.END: "end",
sqlparser.LE: "<",
sqlparser.GE: ">=",
sqlparser.NE: "<>",
sqlparser.NULL_SAFE_EQUAL: "<=>",
sqlparser.IS: "is",
sqlparser.LIKE: "like",
sqlparser.REGEXP: "regexp",
sqlparser.IN: "in",
sqlparser.SHIFT_LEFT: "<<",
sqlparser.SHIFT_RIGHT: ">>",
sqlparser.DIV: "div",
sqlparser.MOD: "mod",
sqlparser.UNARY: "unary",
sqlparser.COLLATE: "collate",
sqlparser.BINARY: "binary",
sqlparser.UNDERSCORE_BINARY: "_binary",
sqlparser.INTERVAL: "interval",
sqlparser.JSON_EXTRACT_OP: "->>",
sqlparser.JSON_UNQUOTE_EXTRACT_OP: "->",
sqlparser.CREATE: "create",
sqlparser.ALTER: "alter",
sqlparser.DROP: "drop",
sqlparser.RENAME: "rename",
sqlparser.ANALYZE: "analyze",
sqlparser.ADD: "add",
sqlparser.SCHEMA: "schema",
sqlparser.TABLE: "table",
sqlparser.INDEX: "index",
sqlparser.VIEW: "view",
sqlparser.TO: "to",
sqlparser.IGNORE: "ignore",
sqlparser.IF: "if",
sqlparser.UNIQUE: "unique",
sqlparser.PRIMARY: "primary",
sqlparser.COLUMN: "column",
sqlparser.CONSTRAINT: "constraint",
sqlparser.SPATIAL: "spatial",
sqlparser.FULLTEXT: "fulltext",
sqlparser.FOREIGN: "foreign",
sqlparser.SHOW: "show",
sqlparser.DESCRIBE: "describe",
sqlparser.EXPLAIN: "explain",
sqlparser.DATE: "date",
sqlparser.ESCAPE: "escape",
sqlparser.REPAIR: "repair",
sqlparser.OPTIMIZE: "optimize",
sqlparser.TRUNCATE: "truncate",
sqlparser.MAXVALUE: "maxvalue",
sqlparser.PARTITION: "partition",
sqlparser.REORGANIZE: "reorganize",
sqlparser.LESS: "less",
sqlparser.THAN: "than",
sqlparser.PROCEDURE: "procedure",
sqlparser.TRIGGER: "trigger",
sqlparser.VINDEX: "vindex",
sqlparser.VINDEXES: "vindexes",
sqlparser.STATUS: "status",
sqlparser.VARIABLES: "variables",
sqlparser.BEGIN: "begin",
sqlparser.START: "start",
sqlparser.TRANSACTION: "transaction",
sqlparser.COMMIT: "commit",
sqlparser.ROLLBACK: "rollback",
sqlparser.BIT: "bit",
sqlparser.TINYINT: "tinyint",
sqlparser.SMALLINT: "smallint",
sqlparser.MEDIUMINT: "mediumint",
sqlparser.INT: "int",
sqlparser.INTEGER: "integer",
sqlparser.BIGINT: "bigint",
sqlparser.INTNUM: "intnum",
sqlparser.REAL: "real",
sqlparser.DOUBLE: "double",
sqlparser.FLOAT_TYPE: "float_type",
sqlparser.DECIMAL: "decimal",
sqlparser.NUMERIC: "numeric",
sqlparser.TIME: "time",
sqlparser.TIMESTAMP: "timestamp",
sqlparser.DATETIME: "datetime",
sqlparser.YEAR: "year",
sqlparser.CHAR: "char",
sqlparser.VARCHAR: "varchar",
sqlparser.BOOL: "bool",
sqlparser.CHARACTER: "character",
sqlparser.VARBINARY: "varbinary",
sqlparser.NCHAR: "nchar",
sqlparser.TEXT: "text",
sqlparser.TINYTEXT: "tinytext",
sqlparser.MEDIUMTEXT: "mediumtext",
sqlparser.LONGTEXT: "longtext",
sqlparser.BLOB: "blob",
sqlparser.TINYBLOB: "tinyblob",
sqlparser.MEDIUMBLOB: "mediumblob",
sqlparser.LONGBLOB: "longblob",
sqlparser.JSON: "json",
sqlparser.ENUM: "enum",
sqlparser.GEOMETRY: "geometry",
sqlparser.POINT: "point",
sqlparser.LINESTRING: "linestring",
sqlparser.POLYGON: "polygon",
sqlparser.GEOMETRYCOLLECTION: "geometrycollection",
sqlparser.MULTIPOINT: "multipoint",
sqlparser.MULTILINESTRING: "multilinestring",
sqlparser.MULTIPOLYGON: "multipolygon",
sqlparser.NULLX: "nullx",
sqlparser.AUTO_INCREMENT: "auto_increment",
sqlparser.APPROXNUM: "approxnum",
sqlparser.SIGNED: "signed",
sqlparser.UNSIGNED: "unsigned",
sqlparser.ZEROFILL: "zerofill",
sqlparser.DATABASES: "databases",
sqlparser.TABLES: "tables",
sqlparser.NAMES: "names",
sqlparser.CHARSET: "charset",
sqlparser.GLOBAL: "global",
sqlparser.SESSION: "session",
sqlparser.CURRENT_TIMESTAMP: "current_timestamp",
sqlparser.DATABASE: "database",
sqlparser.CURRENT_DATE: "current_date",
sqlparser.CURRENT_TIME: "current_time",
sqlparser.LOCALTIME: "localtime",
sqlparser.LOCALTIMESTAMP: "localtimestamp",
sqlparser.UTC_DATE: "utc_date",
sqlparser.UTC_TIME: "utc_time",
sqlparser.UTC_TIMESTAMP: "utc_timestamp",
sqlparser.REPLACE: "replace",
sqlparser.CONVERT: "convert",
sqlparser.CAST: "cast",
sqlparser.SUBSTR: "substr",
sqlparser.SUBSTRING: "substring",
sqlparser.GROUP_CONCAT: "group_concat",
sqlparser.SEPARATOR: "separator",
sqlparser.VSCHEMA: "vschema",
sqlparser.SEQUENCE: "sequence",
sqlparser.MATCH: "match",
sqlparser.AGAINST: "against",
sqlparser.BOOLEAN: "boolean",
sqlparser.LANGUAGE: "language",
sqlparser.WITH: "with",
sqlparser.QUERY: "query",
sqlparser.EXPANSION: "expansion",
sqlparser.UNUSED: "",
}
// 这个变更从vitess更新过来，如果vitess新开了一个关键字这里也要同步开
var mySQLKeywords = map[string]string{
"add": "ADD",
"against": "AGAINST",
"all": "ALL",
"alter": "ALTER",
"analyze": "ANALYZE",
"and": "AND",
"as": "AS",
"asc": "ASC",
"auto_increment": "AUTO_INCREMENT",
"begin": "BEGIN",
"between": "BETWEEN",
"bigint": "BIGINT",
"binary": "BINARY",
"_binary": "UNDERSCORE_BINARY",
"bit": "BIT",
"blob": "BLOB",
"bool": "BOOL",
"boolean": "BOOLEAN",
"by": "BY",
"case": "CASE",
"cast": "CAST",
"char": "CHAR",
"character": "CHARACTER",
"charset": "CHARSET",
"collate": "COLLATE",
"column": "COLUMN",
"comment": "COMMENT_KEYWORD",
"commit": "COMMIT",
"constraint": "CONSTRAINT",
"convert": "CONVERT",
"substr": "SUBSTR",
"substring": "SUBSTRING",
"create": "CREATE",
"cross": "CROSS",
"current_date": "CURRENT_DATE",
"current_time": "CURRENT_TIME",
"current_timestamp": "CURRENT_TIMESTAMP",
"database": "DATABASE",
"databases": "DATABASES",
"date": "DATE",
"datetime": "DATETIME",
"decimal": "DECIMAL",
"default": "DEFAULT",
"delete": "DELETE",
"desc": "DESC",
"describe": "DESCRIBE",
"distinct": "DISTINCT",
"div": "DIV",
"double": "DOUBLE",
"drop": "DROP",
"duplicate": "DUPLICATE",
"else": "ELSE",
"end": "END",
"enum": "ENUM",
"escape": "ESCAPE",
"exists": "EXISTS",
"explain": "EXPLAIN",
"expansion": "EXPANSION",
"false": "FALSE",
"float": "FLOAT_TYPE",
"for": "FOR",
"force": "FORCE",
"foreign": "FOREIGN",
"from": "FROM",
"fulltext": "FULLTEXT",
"geometry": "GEOMETRY",
"geometrycollection": "GEOMETRYCOLLECTION",
"global": "GLOBAL",
"grant": "GRANT",
"group": "GROUP",
"group_concat": "GROUP_CONCAT",
"having": "HAVING",
"if": "IF",
"ignore": "IGNORE",
"in": "IN",
"index": "INDEX",
"inner": "INNER",
"insert": "INSERT",
"int": "INT",
"integer": "INTEGER",
"interval": "INTERVAL",
"into": "INTO",
"is": "IS",
"join": "JOIN",
"json": "JSON",
"key": "KEY",
"keys": "KEYS",
"key_block_size": "KEY_BLOCK_SIZE",
"language": "LANGUAGE",
"last_insert_id": "LAST_INSERT_ID",
"left": "LEFT",
"less": "LESS",
"like": "LIKE",
"limit": "LIMIT",
"linestring": "LINESTRING",
"localtime": "LOCALTIME",
"localtimestamp": "LOCALTIMESTAMP",
"lock": "LOCK",
"longblob": "LONGBLOB",
"longtext": "LONGTEXT",
"match": "MATCH",
"maxvalue": "MAXVALUE",
"mediumblob": "MEDIUMBLOB",
"mediumint": "MEDIUMINT",
"mediumtext": "MEDIUMTEXT",
"mod": "MOD",
"mode": "MODE",
"multilinestring": "MULTILINESTRING",
"multipoint": "MULTIPOINT",
"multipolygon": "MULTIPOLYGON",
"names": "NAMES",
"natural": "NATURAL",
"nchar": "NCHAR",
"next": "NEXT",
"not": "NOT",
"null": "NULL",
"numeric": "NUMERIC",
"offset": "OFFSET",
"on": "ON",
"optimize": "OPTIMIZE",
"or": "OR",
"order": "ORDER",
"outer": "OUTER",
"partition": "PARTITION",
"point": "POINT",
"polygon": "POLYGON",
"primary": "PRIMARY",
"procedure": "PROCEDURE",
"query": "QUERY",
"real": "REAL",
"regexp": "REGEXP",
"rename": "RENAME",
"reorganize": "REORGANIZE",
"repair": "REPAIR",
"replace": "REPLACE",
"revoke": "REVOKE",
"right": "RIGHT",
"rlike": "REGEXP",
"rollback": "ROLLBACK",
"schema": "SCHEMA",
"select": "SELECT",
"separator": "SEPARATOR",
"session": "SESSION",
"set": "SET",
"share": "SHARE",
"show": "SHOW",
"signed": "SIGNED",
"smallint": "SMALLINT",
"spatial": "SPATIAL",
"sql_cache": "SQL_CACHE",
"sql_no_cache": "SQL_NO_CACHE",
"start": "START",
"status": "STATUS",
"straight_join": "STRAIGHT_JOIN",
"stream": "STREAM",
"table": "TABLE",
"tables": "TABLES",
"text": "TEXT",
"than": "THAN",
"then": "THEN",
"time": "TIME",
"timestamp": "TIMESTAMP",
"tinyblob": "TINYBLOB",
"tinyint": "TINYINT",
"tinytext": "TINYTEXT",
"to": "TO",
"transaction": "TRANSACTION",
"trigger": "TRIGGER",
"true": "TRUE",
"truncate": "TRUNCATE",
"union": "UNION",
"unique": "UNIQUE",
"unsigned": "UNSIGNED",
"update": "UPDATE",
"use": "USE",
"using": "USING",
"utc_date": "UTC_DATE",
"utc_time": "UTC_TIME",
"utc_timestamp": "UTC_TIMESTAMP",
"values": "VALUES",
"variables": "VARIABLES",
"varbinary": "VARBINARY",
"varchar": "VARCHAR",
"vindex": "VINDEX",
"vindexes": "VINDEXES",
"view": "VIEW",
"vitess_keyspaces": "VITESS_KEYSPACES",
"vitess_shards": "VITESS_SHARDS",
"vitess_tablets": "VITESS_TABLETS",
"vschema_tables": "VSCHEMA_TABLES",
"when": "WHEN",
"where": "WHERE",
"with": "WITH",
"year": "YEAR",
"zerofill": "ZEROFILL",
}
// Token 基本定义
type Token struct {
Type int
Val string
i int
}
// Tokenizer 用于初始化 token，区别于 Tokenize 函数，这个函数使用 vitess 的切词方式
func Tokenizer(sql string) []Token {
var tokens []Token
tkn := sqlparser.NewStringTokenizer(sql)
typ, val := tkn.Scan()
for typ != 0 {
if val != nil {
tokens = append(tokens, Token{Type: typ, Val: string(val)})
} else {
if typ > 255 {
if v, ok := TokenString[typ]; ok {
tokens = append(tokens, Token{
Type: typ,
Val: v,
})
} else {
tokens = append(tokens, Token{
Type: typ,
Val: "",
})
}
} else {
tokens = append(tokens, Token{
Type: typ,
Val: fmt.Sprintf("%c", typ),
})
}
}
typ, val = tkn.Scan()
}
return tokens
}
// IsMysqlKeyword 判断是否是关键字
func IsMysqlKeyword(name string) bool {
_, ok := mySQLKeywords[strings.ToLower(strings.TrimSpace(name))]
return ok
}
// getNextToken 从 buf 中获取 token
func getNextToken(buf string, previous Token) Token {
var typ int // TOKEN_TYPE
// Whitespace
whiteSpaceReg := regexp.MustCompile(`^\s+`)
if whiteSpaceReg.MatchString(buf) {
return Token{
Type: TokenTypeWhitespace,
Val: " ",
}
}
// Comment (#, --, /**/)
if buf[0] == '#' || (len(buf) > 1 && (buf[:2] == "--" || buf[:2] == "/*")) {
var last int
if buf[0] == '-' || buf[0] == '#' {
// Comment until end of line
last = strings.Index(buf, "\n")
typ = TokenTypeComment
} else {
// Comment until closing comment tag
last = strings.Index(buf[2:], "*/") + 2
typ = TokenTypeBlockComment
}
if last <= 0 {
last = len(buf)
}
return Token{
Type: typ,
Val: buf[:last],
}
}
// Quoted String
if buf[0] == '"' || buf[0] == '\'' || buf[0] == '`' || buf[0] == '[' {
var typ int
switch buf[0] {
case '`', '[':
typ = TokenTypeBacktickQuote
default:
typ = TokenTypeQuote
}
return Token{
Type: typ,
Val: getQuotedString(buf),
}
}
// User-defined Variable
if (buf[0] == '@' || buf[0] == ':') && len(buf) > 1 {
ret := Token{
Type: TokenTypeVariable,
Val: "",
}
if buf[1] == '"' || buf[1] == '\'' || buf[1] == '`' {
// If the variable name is quoted
ret.Val = string(buf[0]) + getQuotedString(buf[1:])
} else {
// Non-quoted variable name
varReg := regexp.MustCompile(`^(` + string(buf[0]) + `[a-zA-Z0-9\._\$]+)`)
if varReg.MatchString(buf) {
ret.Val = varReg.FindString(buf)
}
}
if ret.Val != "" {
return ret
}
}
// Number(decimal, binary, hex...)
numReg := regexp.MustCompile(`^([0-9]+(\.[0-9]+)?|0x[0-9a-fA-F]+|0b[01]+)($|\s|"'` + "`|" + regBoundariesString + ")")
if numReg.MatchString(buf) {
return Token{
Type: TokenTypeNumber,
Val: numReg.FindString(buf),
}
}
// Boundary Character(punctuation and symbols)
boundaryReg := regexp.MustCompile(`^(` + regBoundariesString + `)`)
if boundaryReg.MatchString(buf) {
return Token{
Type: TokenTypeBoundary,
Val: boundaryReg.FindString(buf),
}
}
sqlUpper := strings.ToUpper(buf)
// A reserved word cannot be preceded by a '.'
// this makes it so in "mytable.from", "from" is not considered a reserved word
if previous.Val != "." {
// Top Level Reserved Word
reservedToplevelReg := regexp.MustCompile(`^(` + regReservedToplevelString + `)($|\s|` + regBoundariesString + `)`)
if reservedToplevelReg.MatchString(sqlUpper) {
return Token{
Type: TokenTypeReservedToplevel,
Val: reservedToplevelReg.FindString(sqlUpper),
}
}
// Newline Reserved Word
reservedNewlineReg := regexp.MustCompile(`^(` + regReservedNewlineString + `)($|\s|` + regBoundariesString + `)`)
if reservedNewlineReg.MatchString(sqlUpper) {
return Token{
Type: TokenTypeReservedNewline,
Val: reservedNewlineReg.FindString(sqlUpper),
}
}
// Other Reserved Word
reservedReg := regexp.MustCompile(`^(` + regReservedString + `)($|\s|` + regBoundariesString + `)`)
if reservedNewlineReg.MatchString(sqlUpper) {
return Token{
Type: TokenTypeReserved,
Val: reservedReg.FindString(sqlUpper),
}
}
}
// function
// A function must be succeeded by '('
// this makes it so "count(" is considered a function, but "count" alone is not
functionReg := regexp.MustCompile(`^(` + regFunctionString + `)($|\s|` + regBoundariesString + `)`)
if functionReg.MatchString(sqlUpper) {
return Token{
Type: TokenTypeReserved,
Val: functionReg.FindString(sqlUpper),
}
}
// Non reserved word
noReservedReg := regexp.MustCompile(`(.*?)($|\s|["'` + "`]|" + regBoundariesString + `)`)
if noReservedReg.MatchString(buf) {
return Token{
Type: TokenTypeWord,
Val: noReservedReg.FindString(buf),
}
}
return Token{}
}
// getQuotedString 获取quote
func getQuotedString(buf string) string {
// This checks for the following patterns:
// 1. backtick quoted string using `` to escape
// 2. double quoted string using "" or \" to escape
// 3. single quoted string using '' or \' to escape
start := string(buf[0])
switch start {
case "\"", "`", "'":
reg := fmt.Sprintf(`(^%s[^%s\\]*(?:\\.[^%s\\]*)*(%s|$))+`, start, start, start, start)
quotedReg := regexp.MustCompile(reg)
if quotedReg.MatchString(buf) {
buf = quotedReg.FindString(buf)
} else {
buf = ""
}
default:
buf = ""
}
return buf
}
// Tokenize 序列化 token，区别于 Tokenizer 函数，这个函数是 soar built-in 实现的切词
func Tokenize(sql string) []Token {
var token Token
var tokenLength int
var tokens []Token
tokenCache := make(map[string]Token)
// Used to make sure the string keeps shrinking on each iteration
oldStringLen := len(sql) + 1
currentLength := len(sql)
for currentLength > 0 {
// If the string stopped shrinking, there was a problem
if oldStringLen <= currentLength {
tokens = []Token{
{
Type: TokenTypeError,
Val: sql,
},
}
return tokens
}
oldStringLen = currentLength
cacheKey := ""
// Determine if we can use caching
if currentLength >= maxCachekeySize {
cacheKey = sql[:maxCachekeySize]
}
// See if the token is already cached
if _, ok := tokenCache[cacheKey]; ok {
// Retrieve from cache
token = tokenCache[cacheKey]
tokenLength = len(token.Val)
cacheHits = cacheHits + 1
} else {
// Get the next token and the token type
token = getNextToken(sql, token)
tokenLength = len(token.Val)
cacheMisses = cacheMisses + 1
// If the token is shorter than the max length, store it in cache
if cacheKey != "" && tokenLength < maxCachekeySize {
tokenCache[cacheKey] = token
}
}
tokens = append(tokens, token)
// Advance the string
sql = sql[tokenLength:]
currentLength = currentLength - tokenLength
}
return tokens
}
// Compress compress sql
// this method is inspired by eversql.com
func Compress(sql string) string {
regLineTab := regexp.MustCompile(`(?i)([\n\t])`)
regSpace := regexp.MustCompile(`\s\s+`)
sql = regSpace.ReplaceAllString(regLineTab.ReplaceAllString(sql, " "), " ")
return sql
}
// SplitStatement SQL切分
// return 1. original sql, 2. remove comment sql, 3. left over buf
func SplitStatement(buf []byte, delimiter []byte) (string, string, []byte) {
var singleLineComment bool
var multiLineComment bool
var quoted bool
var quoteRune byte
var sql string
for i := 0; i < len(buf); i++ {
b := buf[i]
// single line comment
if b == '-' {
if !quoted && i+2 < len(buf) && buf[i+1] == '-' && buf[i+2] == ' ' {
singleLineComment = true
i = i + 2
continue
}
if !quoted && i+2 < len(buf) && i == 0 && buf[i+1] == '-' && (buf[i+2] == '\n' || buf[i+2] == '\r') {
sql = "--\n"
break
}
}
if b == '#' {
if !multiLineComment && !quoted && !singleLineComment {
singleLineComment = true
continue
}
}
// new line end single line comment
if b == '\r' || b == '\n' {
if singleLineComment {
sql = string(buf[:i])
singleLineComment = false
if strings.HasPrefix(strings.TrimSpace(sql), "--") ||
strings.HasPrefix(strings.TrimSpace(sql), "#") {
// just comment, query start with '--', '#'
break
}
// comment in multi-line sql
continue
}
continue
}
// multi line comment
// https://dev.mysql.com/doc/refman/8.0/en/comments.html
// https://dev.mysql.com/doc/refman/8.0/en/optimizer-hints.html
if b == '/' && i+1 < len(buf) && buf[i+1] == '*' {
if !multiLineComment && !singleLineComment && !quoted &&
(buf[i+2] != '!' && buf[i+2] != '+') {
i = i + 2
multiLineComment = true
continue
}
}
if b == '*' && i+1 < len(buf) && buf[i+1] == '/' {
if multiLineComment && !quoted && !singleLineComment {
i = i + 2
multiLineComment = false
// '/*comment*/'
if i == len(buf) {
sql = string(buf[:i])
}
// '/*comment*/;', 'select 1/*comment*/;'
if string(buf[i:]) == string(delimiter) {
sql = string(buf)
}
continue
}
}
// quoted string
switch b {
case '`', '\'', '"':
if i > 1 && buf[i-1] != '\\' {
if quoted && b == quoteRune {
quoted = false
quoteRune = 0
} else {
// check if first time found quote
if quoteRune == 0 {
quoted = true
quoteRune = b
}
}
}
}
// delimiter
if !quoted && !singleLineComment && !multiLineComment {
eof := true
for k, c := range delimiter {
if len(buf) > i+k && buf[i+k] != c {
eof = false
}
}
if eof {
i = i + len(delimiter)
sql = string(buf[:i])
break
}
}
// ended of buf
if i == len(buf)-1 {
sql = string(buf)
}
}
orgSQL := string(buf[:len(sql)])
buf = buf[len(sql):]
return orgSQL, strings.TrimSuffix(sql, string(delimiter)), buf
}
// LeftNewLines cal left new lines in space
func LeftNewLines(buf []byte) int {
newLines := 0
for _, b := range buf {
if !unicode.IsSpace(rune(b)) {
break
}
if b == byte('\n') {
newLines++
}
}
return newLines
}
// NewLines cal all new lines
func NewLines(buf []byte) int {
newLines := 0
for _, b := range buf {
if b == byte('\n') {
newLines++
}
}
return newLines
}
// QueryType get query type such as SELECT/INSERT/DELETE/CREATE/ALTER
func QueryType(sql string) string {
tokens := Tokenize(sql)
for _, token := range tokens {
// use strings.Fields for 'ALTER TABLE' token split
for _, tk := range strings.Fields(strings.TrimSpace(token.Val)) {
if val, ok := mySQLKeywords[strings.ToLower(tk)]; ok {