diff options
Diffstat (limited to 'system/database/drivers/mysql/mysql_driver.php')
| -rwxr-xr-x[-rw-r--r--] | system/database/drivers/mysql/mysql_driver.php | 218 |
1 files changed, 155 insertions, 63 deletions
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php index 85a6ef4a0..df18c912e 100644..100755 --- a/system/database/drivers/mysql/mysql_driver.php +++ b/system/database/drivers/mysql/mysql_driver.php @@ -2,11 +2,11 @@ /** * CodeIgniter * - * An open source application development framework for PHP 4.3.2 or newer + * An open source application development framework for PHP 5.1.6 or newer * * @package CodeIgniter * @author ExpressionEngine Dev Team - * @copyright Copyright (c) 2008 - 2010, EllisLab, Inc. + * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. * @license http://codeigniter.com/user_guide/license.html * @link http://codeigniter.com * @since Version 1.0 @@ -43,9 +43,9 @@ class CI_DB_mysql_driver extends CI_DB { * Whether to use the MySQL "delete hack" which allows the number * of affected rows to be shown. Uses a preg_replace when enabled, * adding a bit more processing to all queries. - */ + */ var $delete_hack = TRUE; - + /** * The syntax to count rows is slightly different across different * database engines, so this string appears in each driver and is @@ -59,17 +59,17 @@ class CI_DB_mysql_driver extends CI_DB { * * @access private called by the base class * @return resource - */ + */ function db_connect() { if ($this->port != '') { $this->hostname .= ':'.$this->port; } - + return @mysql_connect($this->hostname, $this->username, $this->password, TRUE); } - + // -------------------------------------------------------------------- /** @@ -77,7 +77,7 @@ class CI_DB_mysql_driver extends CI_DB { * * @access private called by the base class * @return resource - */ + */ function db_pconnect() { if ($this->port != '') @@ -87,7 +87,7 @@ class CI_DB_mysql_driver extends CI_DB { return @mysql_pconnect($this->hostname, $this->username, $this->password); } - + // -------------------------------------------------------------------- /** @@ -108,13 +108,13 @@ class CI_DB_mysql_driver extends CI_DB { } // -------------------------------------------------------------------- - + /** * Select the database * * @access private called by the base class * @return resource - */ + */ function db_select() { return @mysql_select_db($this->database, $this->conn_id); @@ -136,7 +136,7 @@ class CI_DB_mysql_driver extends CI_DB { } // -------------------------------------------------------------------- - + /** * Version number query string * @@ -156,13 +156,13 @@ class CI_DB_mysql_driver extends CI_DB { * @access private called by the base class * @param string an SQL query * @return resource - */ + */ function _execute($sql) { $sql = $this->_prep_query($sql); return @mysql_query($sql, $this->conn_id); } - + // -------------------------------------------------------------------- /** @@ -173,7 +173,7 @@ class CI_DB_mysql_driver extends CI_DB { * @access private called by execute() * @param string an SQL query * @return string - */ + */ function _prep_query($sql) { // "DELETE FROM TABLE" returns 0 affected rows This hack modifies @@ -185,7 +185,7 @@ class CI_DB_mysql_driver extends CI_DB { $sql = preg_replace("/^\s*DELETE\s+FROM\s+(\S+)\s*$/", "DELETE FROM \\1 WHERE 1=1", $sql); } } - + return $sql; } @@ -195,15 +195,15 @@ class CI_DB_mysql_driver extends CI_DB { * Begin Transaction * * @access public - * @return bool - */ + * @return bool + */ function trans_begin($test_mode = FALSE) { if ( ! $this->trans_enabled) { return TRUE; } - + // When transactions are nested we only begin/commit/rollback the outermost ones if ($this->_trans_depth > 0) { @@ -214,7 +214,7 @@ class CI_DB_mysql_driver extends CI_DB { // If the $test_mode flag is set to TRUE transactions will be rolled back // even if the queries produce a successful result. $this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE; - + $this->simple_query('SET AUTOCOMMIT=0'); $this->simple_query('START TRANSACTION'); // can also be BEGIN or BEGIN WORK return TRUE; @@ -226,8 +226,8 @@ class CI_DB_mysql_driver extends CI_DB { * Commit Transaction * * @access public - * @return bool - */ + * @return bool + */ function trans_commit() { if ( ! $this->trans_enabled) @@ -252,8 +252,8 @@ class CI_DB_mysql_driver extends CI_DB { * Rollback Transaction * * @access public - * @return bool - */ + * @return bool + */ function trans_rollback() { if ( ! $this->trans_enabled) @@ -271,7 +271,7 @@ class CI_DB_mysql_driver extends CI_DB { $this->simple_query('SET AUTOCOMMIT=1'); return TRUE; } - + // -------------------------------------------------------------------- /** @@ -282,17 +282,17 @@ class CI_DB_mysql_driver extends CI_DB { * @param bool whether or not the string will be used in a LIKE condition * @return string */ - function escape_str($str, $like = FALSE) - { + function escape_str($str, $like = FALSE) + { if (is_array($str)) { foreach($str as $key => $val) - { + { $str[$key] = $this->escape_str($val, $like); - } - - return $str; - } + } + + return $str; + } if (function_exists('mysql_real_escape_string') AND is_resource($this->conn_id)) { @@ -306,16 +306,16 @@ class CI_DB_mysql_driver extends CI_DB { { $str = addslashes($str); } - + // escape LIKE condition wildcards if ($like === TRUE) { $str = str_replace(array('%', '_'), array('\\%', '\\_'), $str); } - + return $str; } - + // -------------------------------------------------------------------- /** @@ -328,7 +328,7 @@ class CI_DB_mysql_driver extends CI_DB { { return @mysql_affected_rows($this->conn_id); } - + // -------------------------------------------------------------------- /** @@ -360,7 +360,7 @@ class CI_DB_mysql_driver extends CI_DB { { return 0; } - + $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE)); if ($query->num_rows() == 0) @@ -385,7 +385,7 @@ class CI_DB_mysql_driver extends CI_DB { */ function _list_tables($prefix_limit = FALSE) { - $sql = "SHOW TABLES FROM ".$this->_escape_char.$this->database.$this->_escape_char; + $sql = "SHOW TABLES FROM ".$this->_escape_char.$this->database.$this->_escape_char; if ($prefix_limit !== FALSE AND $this->dbprefix != '') { @@ -394,7 +394,7 @@ class CI_DB_mysql_driver extends CI_DB { return $sql; } - + // -------------------------------------------------------------------- /** @@ -408,7 +408,7 @@ class CI_DB_mysql_driver extends CI_DB { */ function _list_columns($table = '') { - return "SHOW COLUMNS FROM ".$table; + return "SHOW COLUMNS FROM ".$this->_protect_identifiers($table, TRUE, NULL, FALSE); } // -------------------------------------------------------------------- @@ -439,7 +439,7 @@ class CI_DB_mysql_driver extends CI_DB { { return mysql_error($this->conn_id); } - + // -------------------------------------------------------------------- /** @@ -475,26 +475,26 @@ class CI_DB_mysql_driver extends CI_DB { { if (strpos($item, '.'.$id) !== FALSE) { - $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item); - + $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item); + // remove duplicates if the user already included the escape return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str); - } + } } - + if (strpos($item, '.') !== FALSE) { - $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char; + $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char; } else { $str = $this->_escape_char.$item.$this->_escape_char; } - + // remove duplicates if the user already included the escape return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str); } - + // -------------------------------------------------------------------- /** @@ -513,12 +513,12 @@ class CI_DB_mysql_driver extends CI_DB { { $tables = array($tables); } - + return '('.implode(', ', $tables).')'; } // -------------------------------------------------------------------- - + /** * Insert statement * @@ -531,12 +531,50 @@ class CI_DB_mysql_driver extends CI_DB { * @return string */ function _insert($table, $keys, $values) - { + { return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")"; } - + // -------------------------------------------------------------------- + + /** + * Replace statement + * + * Generates a platform-specific replace string from the supplied data + * + * @access public + * @param string the table name + * @param array the insert keys + * @param array the insert values + * @return string + */ + function _replace($table, $keys, $values) + { + return "REPLACE INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")"; + } + + // -------------------------------------------------------------------- + + /** + * Insert_batch statement + * + * Generates a platform-specific insert string from the supplied data + * + * @access public + * @param string the table name + * @param array the insert keys + * @param array the insert values + * @return string + */ + function _insert_batch($table, $keys, $values) + { + return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES ".implode(', ', $values); + } + + // -------------------------------------------------------------------- + + /** * Update statement * @@ -556,22 +594,76 @@ class CI_DB_mysql_driver extends CI_DB { { $valstr[] = $key." = ".$val; } - + $limit = ( ! $limit) ? '' : ' LIMIT '.$limit; - + $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):''; - + $sql = "UPDATE ".$table." SET ".implode(', ', $valstr); $sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : ''; $sql .= $orderby.$limit; - + + return $sql; + } + + // -------------------------------------------------------------------- + + + /** + * Update_Batch statement + * + * Generates a platform-specific batch update string from the supplied data + * + * @access public + * @param string the table name + * @param array the update data + * @param array the where clause + * @return string + */ + function _update_batch($table, $values, $index, $where = NULL) + { + $ids = array(); + $where = ($where != '' AND count($where) >=1) ? implode(" ", $where).' AND ' : ''; + + foreach($values as $key => $val) + { + $ids[] = $val[$index]; + + foreach(array_keys($val) as $field) + { + if ($field != $index) + { + $final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field]; + } + } + } + + $sql = "UPDATE ".$table." SET "; + $cases = ''; + + foreach($final as $k => $v) + { + $cases .= $k.' = CASE '."\n"; + foreach ($v as $row) + { + $cases .= $row."\n"; + } + + $cases .= 'ELSE '.$k.' END, '; + } + + $sql .= substr($cases, 0, -2); + + $sql .= ' WHERE '.$where.$index.' IN ('.implode(',', $ids).')'; + return $sql; } // -------------------------------------------------------------------- + /** * Truncate statement * @@ -582,12 +674,12 @@ class CI_DB_mysql_driver extends CI_DB { * @access public * @param string the table name * @return string - */ + */ function _truncate($table) { return "TRUNCATE ".$table; } - + // -------------------------------------------------------------------- /** @@ -600,7 +692,7 @@ class CI_DB_mysql_driver extends CI_DB { * @param array the where clause * @param string the limit clause * @return string - */ + */ function _delete($table, $where = array(), $like = array(), $limit = FALSE) { $conditions = ''; @@ -618,7 +710,7 @@ class CI_DB_mysql_driver extends CI_DB { } $limit = ( ! $limit) ? '' : ' LIMIT '.$limit; - + return "DELETE FROM ".$table.$conditions.$limit; } @@ -636,7 +728,7 @@ class CI_DB_mysql_driver extends CI_DB { * @return string */ function _limit($sql, $limit, $offset) - { + { if ($offset == 0) { $offset = ''; @@ -645,7 +737,7 @@ class CI_DB_mysql_driver extends CI_DB { { $offset .= ", "; } - + return $sql."LIMIT ".$offset.$limit; } @@ -662,7 +754,7 @@ class CI_DB_mysql_driver extends CI_DB { { @mysql_close($conn_id); } - + } |