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<?php declare(strict_types=1); namespace Doctrine\SqlFormatter; use function array_combine; use function array_keys; use function array_map; use function arsort; use function assert; use function implode; use function preg_match; use function preg_quote; use function str_replace; use function strlen; use function strpos; use function strtoupper; use function substr; /** * @internal */ final class Tokenizer { /** * Reserved words (for syntax highlighting) * * @var string[] */ private $reserved = [ 'ACCESSIBLE', 'ACTION', 'AFTER', '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 ROW', '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', 'FILTER', 'FIRST', 'FIXED', 'FLUSH', 'FOR', 'FORCE', 'FOLLOWING', 'FOREIGN', 'FULL', 'FULLTEXT', 'FUNCTION', 'GLOBAL', 'GRANT', 'GRANTS', 'GROUP', 'GROUPS', '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', 'MONTH', 'MRG_MYISAM', 'MYISAM', 'NAMES', 'NATURAL', 'NO OTHERS', 'NOT', 'NOW()', 'NULL', 'OFFSET', 'ON', 'OPEN', 'OPTIMIZE', 'OPTION', 'OPTIONALLY', 'ON UPDATE', 'ON DELETE', 'OUTFILE', 'OVER', 'PACK_KEYS', 'PAGE', 'PARTIAL', 'PARTITION', 'PARTITIONS', 'PASSWORD', 'PRECEDING', 'PRIMARY', 'PRIVILEGES', 'PROCEDURE', 'PROCESS', 'PROCESSLIST', 'PURGE', 'QUICK', 'RANGE', 'RAID0', 'RAID_CHUNKS', 'RAID_CHUNKSIZE', 'RAID_TYPE', 'READ', 'READ_ONLY', 'READ_WRITE', 'RECURSIVE', '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', 'TIES', 'TO', 'TRAILING', 'TRANSACTIONAL', 'TRUE', 'TRUNCATE', 'TYPE', 'TYPES', 'UNBOUNDED', 'UNCOMMITTED', 'UNIQUE', 'UNLOCK', 'UNSIGNED', 'USAGE', 'USE', 'USING', 'VARIABLES', 'VIEW', 'WHEN', 'WITH', 'WORK', 'WRITE', 'YEAR_MONTH', ]; /** * For SQL formatting * These keywords will all be on their own line * * @var string[] */ private $reservedToplevel = [ 'WITH', 'SELECT', 'FROM', 'WHERE', 'SET', 'ORDER BY', 'GROUP BY', 'LIMIT', 'DROP', 'VALUES', 'UPDATE', 'HAVING', 'ADD', 'CHANGE', 'MODIFY', 'ALTER TABLE', 'DELETE FROM', 'UNION ALL', 'UNION', 'EXCEPT', 'INTERSECT', 'PARTITION BY', 'ROWS', 'RANGE', 'GROUPS', 'WINDOW', ]; /** @var string[] */ private $reservedNewline = [ 'LEFT OUTER JOIN', 'RIGHT OUTER JOIN', 'LEFT JOIN', 'RIGHT JOIN', 'OUTER JOIN', 'INNER JOIN', 'JOIN', 'XOR', 'OR', 'AND', 'EXCLUDE', ]; /** @var string[] */ private $functions = [ 'ABS', 'ACOS', 'ADDDATE', 'ADDTIME', 'AES_DECRYPT', 'AES_ENCRYPT', 'APPROX_COUNT_DISTINCT', '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', 'CHECKSUM_AGG', 'COALESCE', 'COERCIBILITY', 'COLLATION', 'COMPRESS', 'CONCAT', 'CONCAT_WS', 'CONNECTION_ID', 'CONTAINS', 'CONV', 'CONVERT', 'CONVERT_TZ', 'CONVEXHULL', 'COS', 'COT', 'COUNT', 'COUNT_BIG', 'CRC32', 'CROSSES', 'CUME_DIST', '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', 'DENSE_RANK', 'DES_DECRYPT', 'DES_ENCRYPT', 'DIFFERENCE', 'DIMENSION', 'DISJOINT', 'DISTANCE', 'ELT', 'ENCODE', 'ENCRYPT', 'ENDPOINT', 'ENVELOPE', 'EQUALS', 'EXP', 'EXPORT_SET', 'EXTERIORRING', 'EXTRACT', 'EXTRACTVALUE', 'FIELD', 'FIND_IN_SET', 'FIRST_VALUE', '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', 'GROUPING', 'GROUPING_ID', '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', 'LAG', 'LAST_DAY', 'LAST_INSERT_ID', 'LAST_VALUE', 'LCASE', 'LEAD', 'LEAST', 'LEFT', 'LENGTH', 'LINEFROMTEXT', 'LINEFROMWKB', 'LINESTRING', 'LINESTRINGFROMTEXT', 'LINESTRINGFROMWKB', 'LISTAGG', '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', 'NTH_VALUE', 'NTILE', 'NULLIF', 'NUMGEOMETRIES', 'NUMINTERIORRINGS', 'NUMPOINTS', 'OCT', 'OCTET_LENGTH', 'OLD_PASSWORD', 'ORD', 'OVERLAPS', 'PASSWORD', 'PERCENT_RANK', 'PERCENTILE_CONT', 'PERCENTILE_DISC', 'PERIOD_ADD', 'PERIOD_DIFF', 'PI', 'POINT', 'POINTFROMTEXT', 'POINTFROMWKB', 'POINTN', 'POINTONSURFACE', 'POLYFROMTEXT', 'POLYFROMWKB', 'POLYGON', 'POLYGONFROMTEXT', 'POLYGONFROMWKB', 'POSITION', 'POW', 'POWER', 'QUARTER', 'QUOTE', 'RADIANS', 'RAND', 'RANK', 'RELATED', 'RELEASE_LOCK', 'REPEAT', 'REPLACE', 'REVERSE', 'RIGHT', 'ROUND', 'ROW_COUNT', 'ROW_NUMBER', 'RPAD', 'RTRIM', 'SCHEMA', 'SECOND', 'SEC_TO_TIME', 'SESSION_USER', 'SHA', 'SHA1', 'SIGN', 'SIN', 'SLEEP', 'SOUNDEX', 'SPACE', 'SQRT', 'SRID', 'STARTPOINT', 'STD', 'STDEV', 'STDEVP', 'STDDEV', 'STDDEV_POP', 'STDDEV_SAMP', 'STRING_AGG', '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', 'VAR', 'VARIANCE', 'VARP', 'VAR_POP', 'VAR_SAMP', 'VERSION', 'WEEK', 'WEEKDAY', 'WEEKOFYEAR', 'WITHIN', 'X', 'Y', 'YEAR', 'YEARWEEK', ]; // Regular expressions for tokenizing /** @var string */ private $regexBoundaries; /** @var string */ private $regexReserved; /** @var string */ private $regexReservedNewline; /** @var string */ private $regexReservedToplevel; /** @var string */ private $regexFunction; /** * Punctuation that can be used as a boundary between other tokens * * @var string[] */ private $boundaries = [ ',', ';', ':', ')', '(', '.', '=', '<', '>', '+', '-', '*', '/', '!', '^', '%', '|', '&', '#', ]; /** * Stuff that only needs to be done once. Builds regular expressions and * sorts the reserved words. */ public function __construct() { // Sort reserved word list from longest word to shortest, 3x faster than usort $reservedMap = array_combine($this->reserved, array_map('strlen', $this->reserved)); assert($reservedMap !== false); arsort($reservedMap); $this->reserved = array_keys($reservedMap); // Set up regular expressions $this->regexBoundaries = '(' . implode( '|', $this->quoteRegex($this->boundaries) ) . ')'; $this->regexReserved = '(' . implode( '|', $this->quoteRegex($this->reserved) ) . ')'; $this->regexReservedToplevel = str_replace(' ', '\\s+', '(' . implode( '|', $this->quoteRegex($this->reservedToplevel) ) . ')'); $this->regexReservedNewline = str_replace(' ', '\\s+', '(' . implode( '|', $this->quoteRegex($this->reservedNewline) ) . ')'); $this->regexFunction = '(' . implode('|', $this->quoteRegex($this->functions)) . ')'; } /** * Takes a SQL string and breaks it into tokens. * Each token is an associative array with type and value. * * @param string $string The SQL string */ public function tokenize(string $string): Cursor { $tokens = []; // Used to make sure the string keeps shrinking on each iteration $oldStringLen = strlen($string) + 1; $token = null; $currentLength = strlen($string); // Keep processing the string until it is empty while ($currentLength) { // If the string stopped shrinking, there was a problem if ($oldStringLen <= $currentLength) { $tokens[] = new Token(Token::TOKEN_TYPE_ERROR, $string); return new Cursor($tokens); } $oldStringLen = $currentLength; // Get the next token and the token type $token = $this->createNextToken($string, $token); $tokenLength = strlen($token->value()); $tokens[] = $token; // Advance the string $string = substr($string, $tokenLength); $currentLength -= $tokenLength; } return new Cursor($tokens); } /** * Return the next token and token type in a SQL string. * Quoted strings, comments, reserved words, whitespace, and punctuation * are all their own tokens. * * @param string $string The SQL string * @param Token|null $previous The result of the previous createNextToken() call * * @return Token An associative array containing the type and value of the token. */ private function createNextToken(string $string, ?Token $previous = null): Token { $matches = []; // Whitespace if (preg_match('/^\s+/', $string, $matches)) { return new Token(Token::TOKEN_TYPE_WHITESPACE, $matches[0]); } // Comment if ( $string[0] === '#' || (isset($string[1]) && ($string[0] === '-' && $string[1] === '-') || (isset($string[1]) && $string[0] === '/' && $string[1] === '*')) ) { // Comment until end of line if ($string[0] === '-' || $string[0] === '#') { $last = strpos($string, "\n"); $type = Token::TOKEN_TYPE_COMMENT; } else { // Comment until closing comment tag $pos = strpos($string, '*/', 2); assert($pos !== false); $last = $pos + 2; $type = Token::TOKEN_TYPE_BLOCK_COMMENT; } if ($last === false) { $last = strlen($string); } return new Token($type, substr($string, 0, $last)); } // Quoted String if ($string[0] === '"' || $string[0] === '\'' || $string[0] === '`' || $string[0] === '[') { return new Token( ($string[0] === '`' || $string[0] === '[' ? Token::TOKEN_TYPE_BACKTICK_QUOTE : Token::TOKEN_TYPE_QUOTE), $this->getQuotedString($string) ); } // User-defined Variable if (($string[0] === '@' || $string[0] === ':') && isset($string[1])) { $value = null; $type = Token::TOKEN_TYPE_VARIABLE; // If the variable name is quoted if ($string[1] === '"' || $string[1] === '\'' || $string[1] === '`') { $value = $string[0] . $this->getQuotedString(substr($string, 1)); } else { // Non-quoted variable name preg_match('/^(' . $string[0] . '[a-zA-Z0-9\._\$]+)/', $string, $matches); if ($matches) { $value = $matches[1]; } } if ($value !== null) { return new Token($type, $value); } } // Number (decimal, binary, or hex) if ( preg_match( '/^([0-9]+(\.[0-9]+)?|0x[0-9a-fA-F]+|0b[01]+)($|\s|"\'`|' . $this->regexBoundaries . ')/', $string, $matches ) ) { return new Token(Token::TOKEN_TYPE_NUMBER, $matches[1]); } // Boundary Character (punctuation and symbols) if (preg_match('/^(' . $this->regexBoundaries . ')/', $string, $matches)) { return new Token(Token::TOKEN_TYPE_BOUNDARY, $matches[1]); } // A reserved word cannot be preceded by a '.' // this makes it so in "mytable.from", "from" is not considered a reserved word if (! $previous || $previous->value() !== '.') { $upper = strtoupper($string); // Top Level Reserved Word if ( preg_match( '/^(' . $this->regexReservedToplevel . ')($|\s|' . $this->regexBoundaries . ')/', $upper, $matches ) ) { return new Token( Token::TOKEN_TYPE_RESERVED_TOPLEVEL, substr($string, 0, strlen($matches[1])) ); } // Newline Reserved Word if ( preg_match( '/^(' . $this->regexReservedNewline . ')($|\s|' . $this->regexBoundaries . ')/', $upper, $matches ) ) { return new Token( Token::TOKEN_TYPE_RESERVED_NEWLINE, substr($string, 0, strlen($matches[1])) ); } // Other Reserved Word if ( preg_match( '/^(' . $this->regexReserved . ')($|\s|' . $this->regexBoundaries . ')/', $upper, $matches ) ) { return new Token( Token::TOKEN_TYPE_RESERVED, substr($string, 0, strlen($matches[1])) ); } } // A function must be succeeded by '(' // this makes it so "count(" is considered a function, but "count" alone is not $upper = strtoupper($string); // function if (preg_match('/^(' . $this->regexFunction . '[(]|\s|[)])/', $upper, $matches)) { return new Token( Token::TOKEN_TYPE_RESERVED, substr($string, 0, strlen($matches[1]) - 1) ); } // Non reserved word preg_match('/^(.*?)($|\s|["\'`]|' . $this->regexBoundaries . ')/', $string, $matches); return new Token(Token::TOKEN_TYPE_WORD, $matches[1]); } /** * Helper function for building regular expressions for reserved words and boundary characters * * @param string[] $strings The strings to be quoted * * @return string[] The quoted strings */ private function quoteRegex(array $strings): array { return array_map(static function (string $string): string { return preg_quote($string, '/'); }, $strings); } private function getQuotedString(string $string): string { $ret = ''; // This checks for the following patterns: // 1. backtick quoted string using `` to escape // 2. square bracket quoted string (SQL Server) using ]] to escape // 3. double quoted string using "" or \" to escape // 4. single quoted string using '' or \' to escape if ( preg_match( '/^(((`[^`]*($|`))+)| ((\[[^\]]*($|\]))(\][^\]]*($|\]))*)| (("[^"\\\\]*(?:\\\\.[^"\\\\]*)*("|$))+)| ((\'[^\'\\\\]*(?:\\\\.[^\'\\\\]*)*(\'|$))+))/sx', $string, $matches ) ) { $ret = $matches[1]; } return $ret; } }