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OpenSQLManager/sys/db/drivers/sqlite_sql.php

122 lines
2.7 KiB
PHP

<?php
/**
* OpenSQLManager
*
* Free Database manager for Open Source Databases
*
* @author Timothy J. Warren
* @copyright Copyright (c) 2012
* @link https://github.com/aviat4ion/OpenSQLManager
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
/**
* SQLite Specific SQL
*/
class SQLite_SQL extends DB_SQL {
/**
* Convenience public function to create a new table
*
* @param string $name //Name of the table
* @param array $columns //columns as straight array and/or column => type pairs
* @param array $constraints // column => constraint pairs
* @param array $indexes // column => index pairs
* @return string
*/
public function create_table($name, $columns, array $constraints=array(), array $indexes=array())
{
$column_array = array();
// Reorganize into an array indexed with column information
// Eg $column_array[$colname] = array(
// 'type' => ...,
// 'constraint' => ...,
// 'index' => ...,
// )
foreach($columns as $colname => $type)
{
if(is_numeric($colname))
{
$colname = $type;
}
$column_array[$colname] = array();
$column_array[$colname]['type'] = ($type !== $colname) ? $type : '';
}
if( ! empty($constraints))
{
foreach($constraints as $col => $const)
{
$column_array[$col]['constraint'] = $const;
}
}
// Join column definitons together
$columns = array();
foreach($column_array as $n => $props)
{
$str = "{$n} ";
$str .= (isset($props['type'])) ? "{$props['type']} " : "";
$str .= (isset($props['constraint'])) ? $props['constraint'] : "";
$columns[] = $str;
}
// Generate the sql for the creation of the table
$sql = "CREATE TABLE IF NOT EXISTS \"{$name}\" (";
$sql .= implode(", ", $columns);
$sql .= ")";
return $sql;
}
// --------------------------------------------------------------------------
/**
* SQL to drop the specified table
*
* @param string $name
* @return string
*/
public function delete_table($name)
{
return 'DROP TABLE IF EXISTS "'.$name.'"';
}
// --------------------------------------------------------------------------
/**
* Limit clause
*
* @param string $sql
* @param int $limit
* @param int $offset
* @return string
*/
public function limit($sql, $limit, $offset=FALSE)
{
if ( ! is_numeric($offset))
{
return $sql." LIMIT {$limit}";
}
return $sql." LIMIT {$offset}, {$limit}";
}
// --------------------------------------------------------------------------
/**
* Random ordering keyword
*
* @return string
*/
public function random()
{
return ' RANDOM()';
}
}
//End of sqlite_sql.php