diff --git a/library/Msd/Sql/Parser.php b/library/Msd/Sql/Parser.php new file mode 100644 index 0000000..7a08b40 --- /dev/null +++ b/library/Msd/Sql/Parser.php @@ -0,0 +1,120 @@ + array( + 'do', 'xa' + ), + 3 => array( + 'set', 'use' + ), + 4 => array( + 'call', 'drop', 'help', 'kill', 'load', 'lock', 'show' + ), + 5 => array( + 'alter', 'check', 'flush', 'grant', 'purge', 'reset', 'slave', 'start' + ), + 6 => array( + 'backup', 'change', 'commit', 'create', 'delete', 'insert', 'rename', 'repair', 'revoke', 'select', + 'unlock', 'update' + ), + 7 => array( + 'analyze', 'execute', 'handler', 'install', 'preload', 'prepare', 'release', 'replace', 'restore' + ), + 8 => array( + 'checksum', 'describe', 'optimize', 'keycache', 'rollback', 'truncate' + ), + 9 => array( + 'savepoint', 'uninstall' + ), + 10 => array( + 'deallocate' + ), + ); + + protected $_sqlComments = array( + '--' => "\n", '/*' => '*/' + ); + + public function __construct($sqlQuery = null) + { + if ($sqlQuery !== null) { + $this->_rawQuery = $sqlQuery; + } + } + + public function parse($sqlQuery = null) + { + if ($sqlQuery === null) { + if ($this->_rawQuery === null) { + include_once 'Msd/Sql/Parser/Exception.php'; + throw new Msd_Sql_Parser_Exception('You must specify a MySQL query for parsing!'); + } + + $sqlQuery = $this->_rawQuery; + } + + $sqlQuery = trim($sqlQuery); + + $statementCounter = 0; + $startPos = 0; + while ($startPos < strlen($sqlQuery)) { + $statementCounter++; + $firstSpace = strpos($sqlQuery, ' ', $startPos); + $statement = trim(strtolower(substr($sqlQuery, $startPos, $firstSpace - $startPos))); + $lengthCheck = strlen($statement); + if ($lengthCheck == 0) { + break; + } + if ($lengthCheck == 1 || $statement{1} == ';' || $statement{1} == "\n") { + $startPos = $startPos + 1; + continue; + } + $commentCheck = substr($statement, 0, 2); + if (array_key_exists($commentCheck, $this->_sqlComments)) { + $commentEnd = $this->_sqlComments[$commentCheck]; + $startPos = strpos($sqlQuery, $commentEnd, $startPos) + strlen($commentEnd); + continue; + } + $statementLength = strlen($statement); + if (!isset($this->_sqlStatements[$statementLength])) { + die("$statement\n"); + } + if (!in_array($statement, $this->_sqlStatements[$statementLength])) { + include_once 'Msd/Sql/Parser/Exception.php'; + throw new Msd_Sql_Parser_Exception("Unknown MySQL statement is found: '$statement'"); + } + $parserClass = 'Msd_Sql_Parser_' . ucwords($statement); + $endPos = $this->_getStatementEndPos($sqlQuery, $startPos); + $completeStatement = trim(substr($sqlQuery, $startPos, $endPos - $startPos)); + $startPos = $endPos + 1; + } + } + + private function _getStatementEndPos($sqlQuery, $startPos = 0) + { + $nextString = strpos($sqlQuery, "'", $startPos); + $nextSemicolon = strpos($sqlQuery, ';', $startPos); + if ($nextString === false) { + if ($nextSemicolon === false) { + return strlen($sqlQuery); + } + + return $nextSemicolon; + } + + while ($nextString < $nextSemicolon) { + $nextString = strpos($sqlQuery, "'", $nextString + 1); + $nextSemicolon = strpos($sqlQuery, ';', $nextString + 1); + $nextString = strpos($sqlQuery, "'", $nextString + 1); + if ($nextString === false) { + break; + } + } + + return $nextSemicolon; + } +} diff --git a/library/Msd/Sql/Parser/Exception.php b/library/Msd/Sql/Parser/Exception.php new file mode 100644 index 0000000..eb803e4 --- /dev/null +++ b/library/Msd/Sql/Parser/Exception.php @@ -0,0 +1,4 @@ +