143 lines
3.1 KiB
PHP
143 lines
3.1 KiB
PHP
<?php declare(strict_types=1);
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/**
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* Query
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*
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* SQL Query Builder / Database Abstraction Layer
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*
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* PHP version 7.1
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*
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* @package Query
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* @author Timothy J. Warren <tim@timshomepage.net>
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* @copyright 2012 - 2018 Timothy J. Warren
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @link https://git.timshomepage.net/aviat4ion/Query
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*/
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namespace Query\Drivers\Sqlite;
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use PDO;
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use PDOStatement;
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use Query\Drivers\AbstractDriver;
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use Query\Drivers\DriverInterface;
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/**
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* SQLite specific class
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*/
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class Driver extends AbstractDriver implements DriverInterface {
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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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* SQLite has a truncate optimization,
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* but no support for the actual keyword
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* @var boolean
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*/
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protected $hasTruncate = FALSE;
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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 $driverOptions
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*/
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public function __construct($dsn, $user=NULL, $pass=NULL, array $driverOptions=[])
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{
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if (strpos($dsn, 'sqlite:') === FALSE)
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{
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$dsn = "sqlite:{$dsn}";
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}
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parent::__construct($dsn, $user, $pass);
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}
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/**
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* List tables for the current database
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*
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* @return mixed
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*/
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public function getTables(): array
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{
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$sql = $this->sql->tableList();
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$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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* Retrieve foreign keys for the table
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*
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* @param string $table
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* @return array
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*/
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public function getFks($table): array
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{
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$returnRows = [];
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foreach(parent::getFks($table) as $row)
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{
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$returnRows[] = [
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'child_column' => $row['from'],
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'parent_table' => $row['table'],
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'parent_column' => $row['to'],
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'update' => $row['on_update'],
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'delete' => $row['on_delete']
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];
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}
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return $returnRows;
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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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* @codeCoverageIgnore
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* @param string $table
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* @param array $data
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* @return string
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*/
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public function insertBatch($table, $data=[])
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{
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// If greater than version 3.7.11, supports the same syntax as
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// MySQL and Postgres
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if (version_compare($this->getAttribute(PDO::ATTR_SERVER_VERSION), '3.7.11', '>='))
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{
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return parent::insertBatch($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)))
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{
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return NULL;
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}
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// Start the block of sql statements
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$table = $this->quoteTable($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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$cols = [];
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foreach($first as $colname => $datum)
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{
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$cols[] = $this->_quote($datum) . ' AS ' . $this->quoteIdent($colname);
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}
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$sql .= "SELECT " . implode(', ', $cols) . "\n";
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foreach($data as $union)
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{
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$vals = array_map([$this, 'quote'], $union);
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$sql .= "UNION SELECT " . implode(',', $vals) . "\n";
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}
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return [$sql, NULL];
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}
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} |