Query/drivers/sqlite/sqlite_sql.php

198 lines
3.4 KiB
PHP

<?php
/**
* Query
*
* Free Query Builder / Database Abstraction Layer
*
* @package Query
* @author Timothy J. Warren
* @copyright Copyright (c) 2012 - 2014
* @link https://github.com/aviat4ion/Query
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
/**
* SQLite Specific SQL
*
* @package Query
* @subpackage Drivers
*/
class SQLite_SQL implements iDB_SQL {
/**
* Limit clause
*
* @param string $sql
* @param int $limit
* @param int $offset
* @return string
*/
public function limit($sql, $limit, $offset=FALSE)
{
$sql .= "\nLIMIT {$limit}";
if (is_numeric($offset))
{
$sql .= " OFFSET {$offset}";
}
return $sql;
}
// --------------------------------------------------------------------------
/**
* Get the query plan for the sql query
*
* @param string $sql
* @return string
*/
public function explain($sql)
{
return "EXPLAIN QUERY PLAN {$sql}";
}
// --------------------------------------------------------------------------
/**
* Random ordering keyword
*
* @return string
*/
public function random()
{
return ' RANDOM()';
}
// --------------------------------------------------------------------------
/**
* Returns sql to list other databases
*
* @return NULL
*/
public function db_list()
{
return NULL;
}
// --------------------------------------------------------------------------
/**
* Returns sql to list tables
*
* @return string
*/
public function table_list()
{
return <<<SQL
SELECT "name"
FROM "sqlite_master"
WHERE "type"='table'
ORDER BY "name" DESC
SQL;
}
// --------------------------------------------------------------------------
/**
* Overridden in SQLite class
*
* @return string
*/
public function system_table_list()
{
return NULL;
}
// --------------------------------------------------------------------------
/**
* Returns sql to list views
*
* @return string
*/
public function view_list()
{
return <<<SQL
SELECT "name" FROM "sqlite_master" WHERE "type" = 'view'
SQL;
}
// --------------------------------------------------------------------------
/**
* Returns sql to list triggers
*
* @return NULL
*/
public function trigger_list()
{
return NULL;
}
// --------------------------------------------------------------------------
/**
* Return sql to list functions
*
* @return NULL
*/
public function function_list()
{
return NULL;
}
// --------------------------------------------------------------------------
/**
* Return sql to list stored procedures
*
* @return NULL
*/
public function procedure_list()
{
return NULL;
}
// --------------------------------------------------------------------------
/**
* Return sql to list sequences
*
* @return NULL
*/
public function sequence_list()
{
return NULL;
}
// --------------------------------------------------------------------------
/**
* SQL to show list of field types
*
* @return string[]
*/
public function type_list()
{
return array('INTEGER', 'REAL', 'TEXT', 'BLOB');
}
// --------------------------------------------------------------------------
/**
* SQL to show infromation about columns in a table
*
* @param string $table
* @return string
*/
public function column_list($table)
{
return 'PRAGMA table_info("'.$table.'")';
}
}
//End of sqlite_sql.php