181 lines
3.4 KiB
PHP
181 lines
3.4 KiB
PHP
<?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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* @package Query
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* @author Timothy J. Warren
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* @copyright Copyright (c) 2012 - 2013
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* @link https://github.com/aviat4ion/Query
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* @license http://philsturgeon.co.uk/code/dbad-license
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*/
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// --------------------------------------------------------------------------
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/**
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* MySQL specifc SQL
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*
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* @package Query
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* @subpackage Drivers
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*/
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class MySQL_SQL implements iDB_SQL {
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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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// --------------------------------------------------------------------------
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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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return ' RAND()';
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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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return "SHOW DATABASES WHERE `Database` !='information_schema'";
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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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* @param string $database
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* @return string
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*/
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public function table_list($database='')
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{
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if ( ! empty($database))
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{
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return "SHOW TABLES FROM `{$database}`";
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}
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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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return 'SELECT `TABLE_NAME` FROM `information_schema`.`TABLES`
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WHERE `TABLE_SCHEMA`=\'information_schema\'';
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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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* @return NULL
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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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}
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// --------------------------------------------------------------------------
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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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return "SELECT DISTINCT `DATA_TYPE` FROM `information_schema`.`COLUMNS`";
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}
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// --------------------------------------------------------------------------
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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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}
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}
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//End of mysql_sql.php
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