149 lines
3.0 KiB
PHP
149 lines
3.0 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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* @author Timothy J. Warren
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* @copyright Copyright (c) 2012
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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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* SQLite specific class
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*
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* @extends DB_PDO
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*/
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class SQLite extends DB_PDO {
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/**
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* Reference to the last executed sql query
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*/
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protected $statement;
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/**
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* Open SQLite Database
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*
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* @param string $dsn
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* @param string $user
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* @param string $pass
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*/
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public function __construct($dsn, $user=NULL, $pass=NULL)
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{
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// DSN is simply `sqlite:/path/to/db`
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parent::__construct("sqlite:{$dsn}", $user, $pass);
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}
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// --------------------------------------------------------------------------
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/**
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* Doesn't apply to sqlite
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*
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* @param string $name
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*/
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public function switch_db($name)
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{
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return FALSE;
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}
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// --------------------------------------------------------------------------
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/**
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* Empty a table
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*
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* @param string $table
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*/
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public function truncate($table)
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{
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// SQLite has a TRUNCATE optimization,
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// but no support for the actual command.
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$sql = 'DELETE FROM "'.$table.'"';
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$this->statement = $this->query($sql);
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return $this->statement;
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}
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// --------------------------------------------------------------------------
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/**
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* List tables for the current database
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*
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* @return mixed
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*/
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public function get_tables()
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{
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$tables = array();
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$sql = <<<SQL
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SELECT "name"
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FROM "sqlite_master"
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WHERE "type"='table'
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ORDER BY "name" DESC
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SQL;
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$res = $this->query($sql);
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return db_filter($res->fetchAll(PDO::FETCH_ASSOC), 'name');
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}
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// --------------------------------------------------------------------------
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/**
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* List system tables for the current database
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*
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* @return array
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*/
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public function get_system_tables()
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{
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//SQLite only has the sqlite_master table
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// that is of any importance.
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return array('sqlite_master');
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}
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// --------------------------------------------------------------------------
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/**
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* Load a database for the current connection
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*
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* @param string $db
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* @param string $name
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*/
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public function load_database($db, $name)
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{
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$sql = 'ATTACH DATABASE "'.$db.'" AS "'.$name.'"';
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$this->query($sql);
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}
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// --------------------------------------------------------------------------
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/**
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* Unload a database from the current connection
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*
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* @param string $name
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*/
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public function unload_database($name)
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{
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$sql = 'DETACH DATABASE ":name"';
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$this->prepare_query($sql, array(
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':name' => $name,
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));
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$this->statement->execute();
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}
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// --------------------------------------------------------------------------
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/**
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* Return the number of rows returned for a SELECT query
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*
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* @return int
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*/
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public function num_rows()
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{
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return (isset($this->statement)) ? $this->statement->rowCount() : FALSE;
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}
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}
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//End of sqlite_driver.php
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