141 lines
3.3 KiB
PHP
141 lines
3.3 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 - 2014
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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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namespace Query\Driver;
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/**
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* SQLite specific class
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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 SQLite extends Abstract_Driver {
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/**
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* Reference to the last executed sql query
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*
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* @var PDOStatement
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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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* @param array $driver_options
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*/
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public function __construct($dsn, $user=NULL, $pass=NULL, array $driver_options=array())
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{
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// DSN is simply `sqlite:/path/to/db`
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parent::__construct("sqlite:{$dsn}", $user, $pass);
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}
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// --------------------------------------------------------------------------
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/**
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* 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 $this->statement;
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}
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// --------------------------------------------------------------------------
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/**
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* List tables for the current database
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*
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* @return mixed
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*/
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public function get_tables()
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{
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$sql = $this->sql->table_list();
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$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 string[]
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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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* Create sql for batch insert
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*
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* @param string $table
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* @param array $data
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* @return string
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*/
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public function insert_batch($table, $data=array())
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{
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// If greater than version 3.7.11, supports the same syntax as
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// MySQL and Postgres
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if (version_compare($this->getAttribute(\PDO::ATTR_SERVER_VERSION), '3.7.11', '>='))
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{
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return parent::insert_batch($table, $data);
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}
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// --------------------------------------------------------------------------
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// Otherwise, do a union query as an analogue to a 'proper' batch insert
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// --------------------------------------------------------------------------
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// Each member of the data array needs to be an array
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if ( ! is_array(current($data))) return NULL;
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// Start the block of sql statements
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$table = $this->quote_table($table);
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$sql = "INSERT INTO {$table} \n";
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// Create a key-value mapping for each field
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$first = array_shift($data);
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$cols = array();
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foreach($first as $colname => $datum)
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{
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$cols[] = $this->_quote($datum) . ' AS ' . $this->quote_ident($colname);
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}
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$sql .= "SELECT " . implode(', ', $cols) . "\n";
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foreach($data as $item)
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{
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$vals = array_map(array($this, 'quote'), $item);
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$sql .= "UNION SELECT " . implode(',', $vals) . "\n";
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}
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return array($sql, NULL);
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}
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}
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//End of sqlite_driver.php
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