194 lines
4.0 KiB
PHP
194 lines
4.0 KiB
PHP
<?php
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namespace PicoDb\Driver;
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use PDO;
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use PDOException;
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/**
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* Sqlite Driver
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*
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* @package PicoDb\Driver
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* @author Frederic Guillot
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*/
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class Sqlite extends Base
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{
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/**
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* List of required settings options
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*
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* @access protected
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* @var array
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*/
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protected $requiredAttributes = array('filename');
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/**
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* Create a new PDO connection
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*
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* @access public
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* @param array $settings
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*/
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public function createConnection(array $settings)
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{
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$this->pdo = new PDO('sqlite:'.$settings['filename']);
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$this->enableForeignKeys();
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}
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/**
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* Enable foreign keys
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*
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* @access public
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*/
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public function enableForeignKeys()
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{
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$this->pdo->exec('PRAGMA foreign_keys = ON');
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}
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/**
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* Disable foreign keys
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*
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* @access public
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*/
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public function disableForeignKeys()
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{
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$this->pdo->exec('PRAGMA foreign_keys = OFF');
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}
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/**
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* Return true if the error code is a duplicate key
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*
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* @access public
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* @param integer $code
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* @return boolean
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*/
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public function isDuplicateKeyError($code)
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{
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return $code == 23000;
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}
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/**
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* Escape identifier
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*
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* @access public
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* @param string $identifier
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* @return string
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*/
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public function escape($identifier)
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{
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return '"'.$identifier.'"';
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}
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/**
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* Get non standard operator
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*
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* @access public
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* @param string $operator
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* @return string
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*/
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public function getOperator($operator)
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{
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if ($operator === 'LIKE' || $operator === 'ILIKE') {
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return 'LIKE';
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}
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return '';
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}
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/**
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* Get last inserted id
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*
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* @access public
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* @return integer
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*/
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public function getLastId()
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{
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return $this->pdo->lastInsertId();
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}
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/**
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* Get current schema version
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*
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* @access public
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* @return integer
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*/
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public function getSchemaVersion()
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{
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$rq = $this->pdo->prepare('PRAGMA user_version');
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$rq->execute();
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return (int) $rq->fetchColumn();
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}
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/**
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* Set current schema version
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*
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* @access public
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* @param integer $version
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*/
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public function setSchemaVersion($version)
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{
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$this->pdo->exec('PRAGMA user_version='.$version);
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}
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/**
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* Upsert for a key/value variable
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*
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* @access public
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* @param string $table
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* @param string $keyColumn
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* @param string $valueColumn
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* @param array $dictionary
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* @return bool False on failure
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*/
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public function upsert($table, $keyColumn, $valueColumn, array $dictionary)
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{
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try {
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$this->pdo->beginTransaction();
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foreach ($dictionary as $key => $value) {
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$sql = sprintf(
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'INSERT OR REPLACE INTO %s (%s, %s) VALUES (?, ?)',
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$this->escape($table),
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$this->escape($keyColumn),
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$this->escape($valueColumn)
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);
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$rq = $this->pdo->prepare($sql);
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$rq->execute(array($key, $value));
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}
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$this->pdo->commit();
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return true;
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}
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catch (PDOException $e) {
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$this->pdo->rollBack();
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return false;
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}
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}
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/**
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* Run EXPLAIN command
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*
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* @access public
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* @param string $sql
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* @param array $values
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* @return array
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*/
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public function explain($sql, array $values)
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{
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return $this->getConnection()->query('EXPLAIN QUERY PLAN '.$this->getSqlFromPreparedStatement($sql, $values))->fetchAll(PDO::FETCH_ASSOC);
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}
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/**
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* Get database version
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*
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* @access public
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* @return array
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*/
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public function getDatabaseVersion()
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{
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return $this->getConnection()->query('SELECT sqlite_version()')->fetchColumn();
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}
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}
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