146 lines
3.2 KiB
PHP
146 lines
3.2 KiB
PHP
<?php
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/**
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* This file is part of the Propel package.
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @license MIT License
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*/
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/**
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* This is used in order to connect to a MySQL database.
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*
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* @author Hans Lellelid <hans@xmpl.org> (Propel)
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* @author Jon S. Stevens <jon@clearink.com> (Torque)
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* @author Brett McLaughlin <bmclaugh@algx.net> (Torque)
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* @author Daniel Rall <dlr@finemaltcoding.com> (Torque)
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* @version $Revision: 1612 $
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* @package propel.runtime.adapter
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*/
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class DBMySQL extends DBAdapter
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{
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/**
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* This method is used to ignore case.
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*
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* @param in The string to transform to upper case.
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* @return The upper case string.
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*/
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public function toUpperCase($in)
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{
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return "UPPER(" . $in . ")";
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}
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/**
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* This method is used to ignore case.
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*
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* @param in The string whose case to ignore.
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* @return The string in a case that can be ignored.
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*/
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public function ignoreCase($in)
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{
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return "UPPER(" . $in . ")";
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}
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/**
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* Returns SQL which concatenates the second string to the first.
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*
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* @param string String to concatenate.
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* @param string String to append.
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* @return string
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*/
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public function concatString($s1, $s2)
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{
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return "CONCAT($s1, $s2)";
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}
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/**
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* Returns SQL which extracts a substring.
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*
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* @param string String to extract from.
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* @param int Offset to start from.
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* @param int Number of characters to extract.
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* @return string
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*/
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public function subString($s, $pos, $len)
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{
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return "SUBSTRING($s, $pos, $len)";
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}
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/**
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* Returns SQL which calculates the length (in chars) of a string.
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*
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* @param string String to calculate length of.
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* @return string
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*/
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public function strLength($s)
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{
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return "CHAR_LENGTH($s)";
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}
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/**
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* Locks the specified table.
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*
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* @param Connection $con The Propel connection to use.
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* @param string $table The name of the table to lock.
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* @throws PDOException No Statement could be created or
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* executed.
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*/
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public function lockTable(PDO $con, $table)
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{
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$con->exec("LOCK TABLE " . $table . " WRITE");
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}
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/**
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* Unlocks the specified table.
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*
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* @param PDO $con The PDO connection to use.
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* @param string $table The name of the table to unlock.
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* @throws PDOException No Statement could be created or
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* executed.
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*/
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public function unlockTable(PDO $con, $table)
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{
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$statement = $con->exec("UNLOCK TABLES");
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}
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/**
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* @see DBAdapter::quoteIdentifier()
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*/
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public function quoteIdentifier($text)
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{
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return '`' . $text . '`';
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}
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/**
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* @see DBAdapter::useQuoteIdentifier()
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*/
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public function useQuoteIdentifier()
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{
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return true;
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}
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/**
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* @see DBAdapter::applyLimit()
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*/
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public function applyLimit(&$sql, $offset, $limit)
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{
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if ( $limit > 0 ) {
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$sql .= " LIMIT " . ($offset > 0 ? $offset . ", " : "") . $limit;
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} else if ( $offset > 0 ) {
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$sql .= " LIMIT " . $offset . ", 18446744073709551615";
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}
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}
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/**
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* @see DBAdapter::random()
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*/
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public function random($seed = null)
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{
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return 'rand('.((int) $seed).')';
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}
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}
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