2012-04-10 14:06:34 -04:00
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<?php
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/**
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* Query
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*
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* Free Query Builder / Database Abstraction Layer
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*
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2012-04-20 13:17:39 -04:00
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* @package Query
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* @author Timothy J. Warren
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2014-01-02 12:36:50 -05:00
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* @copyright Copyright (c) 2012 - 2014
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2012-04-10 14:06:34 -04:00
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* @link https://github.com/aviat4ion/Query
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2012-04-20 13:17:39 -04:00
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* @license http://philsturgeon.co.uk/code/dbad-license
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2012-04-10 14:06:34 -04:00
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*/
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// --------------------------------------------------------------------------
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2014-04-24 15:32:09 -04:00
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namespace Query\Driver\SQL;
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2014-04-02 17:08:50 -04:00
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2012-04-10 14:06:34 -04:00
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/**
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* MySQL specifc SQL
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2012-04-20 13:17:39 -04:00
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*
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* @package Query
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* @subpackage Drivers
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2012-04-10 14:06:34 -04:00
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*/
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2014-03-26 21:33:58 -04:00
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class MySQL_SQL extends Abstract_SQL {
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2012-04-10 14:06:34 -04:00
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/**
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* Limit clause
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*
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* @param string $sql
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* @param int $limit
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* @param int $offset
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* @return string
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*/
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public function limit($sql, $limit, $offset=FALSE)
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{
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if ( ! is_numeric($offset))
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{
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return $sql." LIMIT {$limit}";
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}
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return $sql." LIMIT {$offset}, {$limit}";
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}
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2014-02-25 13:47:35 -05:00
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2014-02-04 20:59:30 -05:00
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// --------------------------------------------------------------------------
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2014-02-25 13:47:35 -05:00
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2014-02-04 20:59:30 -05:00
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/**
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* Get the query plan for the sql query
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*
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* @param string $sql
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* @return string
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*/
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public function explain($sql)
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{
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return "EXPLAIN EXTENDED {$sql}";
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}
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2012-04-10 14:06:34 -04:00
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// --------------------------------------------------------------------------
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/**
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* Random ordering keyword
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*
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* @return string
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*/
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public function random()
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{
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2014-04-07 10:02:52 -04:00
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return ' RAND() DESC';
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2012-04-10 14:06:34 -04:00
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}
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// --------------------------------------------------------------------------
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/**
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* Returns sql to list other databases
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*
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* @return string
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*/
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public function db_list()
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{
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2014-04-08 17:13:41 -04:00
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return "SHOW DATABASES WHERE `Database` NOT IN ('information_schema','mysql')";
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2012-04-10 14:06:34 -04:00
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}
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// --------------------------------------------------------------------------
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/**
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* Returns sql to list tables
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*
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2012-05-09 13:54:38 -04:00
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* @param string $database
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2012-04-10 14:06:34 -04:00
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* @return string
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*/
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2012-05-09 13:54:38 -04:00
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public function table_list($database='')
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{
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2014-02-25 13:47:35 -05:00
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if ( ! empty($database)) return "SHOW TABLES FROM `{$database}`";
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2012-04-10 14:06:34 -04:00
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return 'SHOW TABLES';
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}
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// --------------------------------------------------------------------------
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/**
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* Overridden in MySQL class
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*
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* @return string
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*/
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public function system_table_list()
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{
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2014-02-25 13:47:35 -05:00
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return 'SELECT `TABLE_NAME` FROM `information_schema`.`TABLES`
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2012-04-16 12:49:32 -04:00
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WHERE `TABLE_SCHEMA`=\'information_schema\'';
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2012-04-10 14:06:34 -04:00
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}
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// --------------------------------------------------------------------------
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/**
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* Returns sql to list views
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*
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* @return string
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*/
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public function view_list()
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{
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return 'SELECT `table_name` FROM `information_schema`.`views`';
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}
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// --------------------------------------------------------------------------
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/**
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* Returns sql to list triggers
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*
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* @return string
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*/
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public function trigger_list()
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{
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return 'SHOW TRIGGERS';
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}
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// --------------------------------------------------------------------------
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/**
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* Return sql to list functions
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*
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* @return string
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*/
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public function function_list()
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{
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return 'SHOW FUNCTION STATUS';
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}
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// --------------------------------------------------------------------------
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/**
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* Return sql to list stored procedures
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*
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* @return string
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*/
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public function procedure_list()
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{
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return 'SHOW PROCEDURE STATUS';
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}
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// --------------------------------------------------------------------------
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/**
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* Return sql to list sequences
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*
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2013-05-01 15:59:23 -04:00
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* @return NULL
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2012-04-10 14:06:34 -04:00
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*/
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public function sequence_list()
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{
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return NULL;
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2012-04-10 14:06:34 -04:00
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}
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2014-02-25 13:47:35 -05:00
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2012-05-07 16:05:51 -04:00
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// --------------------------------------------------------------------------
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2014-02-25 13:47:35 -05:00
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2012-05-07 16:05:51 -04:00
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/**
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* SQL to show list of field types
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*
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* @return string
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*/
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public function type_list()
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{
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2012-05-09 13:54:38 -04:00
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return "SELECT DISTINCT `DATA_TYPE` FROM `information_schema`.`COLUMNS`";
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}
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2014-02-25 13:47:35 -05:00
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2012-05-09 13:54:38 -04:00
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// --------------------------------------------------------------------------
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2014-02-25 13:47:35 -05:00
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2012-05-09 13:54:38 -04:00
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/**
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* SQL to show infromation about columns in a table
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*
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* @param string $table
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* @return string
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*/
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public function column_list($table)
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{
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return "SHOW FULL COLUMNS FROM {$table}";
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2012-05-07 16:05:51 -04:00
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}
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2014-04-07 16:49:49 -04:00
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// --------------------------------------------------------------------------
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/**
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* Get the list of foreign keys for the current
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* table
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*
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2014-04-15 16:15:08 -04:00
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* @param string $table
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2014-04-07 16:49:49 -04:00
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* @return string
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*/
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public function fk_list($table)
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{
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return <<<SQL
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SELECT DISTINCT `kcu`.`COLUMN_NAME` as `child_column`,
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`kcu`.`REFERENCED_TABLE_NAME` as `parent_table`,
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2014-04-17 16:41:12 -04:00
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`kcu`.`REFERENCED_COLUMN_NAME` as `parent_column`,
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`rc`.`UPDATE_RULE` AS `update`,
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`rc`.`DELETE_RULE` AS `delete`
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2014-04-15 16:15:08 -04:00
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FROM `INFORMATION_SCHEMA`.`TABLE_CONSTRAINTS` `tc`
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INNER JOIN `INFORMATION_SCHEMA`.`KEY_COLUMN_USAGE` `kcu`
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ON `kcu`.`CONSTRAINT_NAME`=`tc`.`CONSTRAINT_NAME`
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INNER JOIN `INFORMATION_SCHEMA`.`REFERENTIAL_CONSTRAINTS` `rc`
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ON `rc`.`CONSTRAINT_NAME`=`tc`.`CONSTRAINT_NAME`
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WHERE `tc`.`CONSTRAINT_TYPE`='FOREIGN KEY'
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AND `tc`.`TABLE_NAME`='{$table}'
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2014-04-07 16:49:49 -04:00
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SQL;
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}
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2014-04-08 14:43:07 -04:00
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// --------------------------------------------------------------------------
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/**
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* Get the list of indexes for the current table
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*
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* @param string $table
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* @return array
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*/
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public function index_list($table)
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{
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return "SHOW INDEX IN {$table}";
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}
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2012-04-10 14:06:34 -04:00
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}
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2014-02-04 20:59:30 -05:00
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//End of mysql_sql.php
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