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<?php
/**
* This file is part of the Nette Framework (http://nette.org)
*
* Copyright (c) 2004 David Grudl (http://davidgrudl.com)
*
* For the full copyright and license information, please view
* the file license.txt that was distributed with this source code.
*/
namespace Nette\Database\Drivers;
use Nette;
/**
* Supplemental SQLite3 database driver.
*
* @author David Grudl
*/
class SqliteDriver extends Nette\Object implements Nette\Database\ISupplementalDriver
{
/** @var Nette\Database\Connection */
private $connection;
/** @var string Datetime format */
private $fmtDateTime;
public function __construct(Nette\Database\Connection $connection, array $options)
{
$this->connection = $connection;
$this->fmtDateTime = isset($options['formatDateTime']) ? $options['formatDateTime'] : 'U';
//$connection->exec('PRAGMA foreign_keys = ON');
}
/********************* SQL ****************d*g**/
/**
* Delimites identifier for use in a SQL statement.
*/
public function delimite($name)
{
return '[' . strtr($name, '[]', ' ') . ']';
}
/**
* Formats boolean for use in a SQL statement.
*/
public function formatBool($value)
{
return $value ? '1' : '0';
}
/**
* Formats date-time for use in a SQL statement.
*/
public function formatDateTime(\DateTime $value)
{
return $value->format($this->fmtDateTime);
}
/**
* Encodes string for use in a LIKE statement.
*/
public function formatLike($value, $pos)
{
$value = addcslashes(substr($this->connection->quote($value), 1, -1), '%_\\');
return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'") . " ESCAPE '\\'";
}
/**
* Injects LIMIT/OFFSET to the SQL query.
*/
public function applyLimit(&$sql, $limit, $offset)
{
if ($limit >= 0 || $offset > 0) {
$sql .= ' LIMIT ' . $limit . ($offset > 0 ? ' OFFSET ' . (int) $offset : '');
}
}
/**
* Normalizes result row.
*/
public function normalizeRow($row, $statement)
{
return $row;
}
/********************* reflection ****************d*g**/
/**
* Returns list of tables.
*/
public function getTables()
{
return $this->connection->query("
SELECT name, type = 'view' as view FROM sqlite_master WHERE type IN ('table', 'view')
UNION ALL
SELECT name, type = 'view' as view FROM sqlite_temp_master WHERE type IN ('table', 'view')
ORDER BY name
")->fetchAll();
}
/**
* Returns metadata for all columns in a table.
*/
public function getColumns($table)
{
$meta = $this->connection->query("
SELECT sql FROM sqlite_master WHERE type = 'table' AND name = {$this->connection->quote($table)}
UNION ALL
SELECT sql FROM sqlite_temp_master WHERE type = 'table' AND name = {$this->connection->quote($table)}
")->fetch();
$columns = array();
foreach ($this->connection->query("PRAGMA table_info({$this->delimite($table)})") as $row) {
$column = $row['name'];
$pattern = "/(\"$column\"|\[$column\]|$column)\\s+[^,]+\\s+PRIMARY\\s+KEY\\s+AUTOINCREMENT/Ui";
$type = explode('(', $row['type']);
$columns[] = array(
'name' => $column,
'table' => $table,
'fullname' => "$table.$column",
'nativetype' => strtoupper($type[0]),
'size' => isset($type[1]) ? (int) $type[1] : NULL,
'nullable' => $row['notnull'] == '0',
'default' => $row['dflt_value'],
'autoincrement' => (bool) preg_match($pattern, $meta['sql']),
'primary' => $row['pk'] == '1',
'vendor' => (array) $row,
);
}
return $columns;
}
/**
* Returns metadata for all indexes in a table.
*/
public function getIndexes($table)
{
$indexes = array();
foreach ($this->connection->query("PRAGMA index_list({$this->delimite($table)})") as $row) {
$indexes[$row['name']]['name'] = $row['name'];
$indexes[$row['name']]['unique'] = (bool) $row['unique'];
}
foreach ($indexes as $index => $values) {
$res = $this->connection->query("PRAGMA index_info({$this->delimite($index)})");
while ($row = $res->fetch(TRUE)) {
$indexes[$index]['columns'][$row['seqno']] = $row['name'];
}
}
$columns = $this->getColumns($table);
foreach ($indexes as $index => $values) {
$column = $indexes[$index]['columns'][0];
$primary = FALSE;
foreach ($columns as $info) {
if ($column == $info['name']) {
$primary = $info['primary'];
break;
}
}
$indexes[$index]['primary'] = (bool) $primary;
}
if (!$indexes) { // @see http://www.sqlite.org/lang_createtable.html#rowid
foreach ($columns as $column) {
if ($column['vendor']['pk']) {
$indexes[] = array(
'name' => 'ROWID',
'unique' => TRUE,
'primary' => TRUE,
'columns' => array($column['name']),
);
break;
}
}
}
return array_values($indexes);
}
/**
* Returns metadata for all foreign keys in a table.
*/
public function getForeignKeys($table)
{
$keys = array();
foreach ($this->connection->query("PRAGMA foreign_key_list({$this->delimite($table)})") as $row) {
$keys[$row['id']]['name'] = $row['id']; // foreign key name
$keys[$row['id']]['local'] = $row['from']; // local columns
$keys[$row['id']]['table'] = $row['table']; // referenced table
$keys[$row['id']]['foreign'] = $row['to']; // referenced columns
$keys[$row['id']]['onDelete'] = $row['on_delete'];
$keys[$row['id']]['onUpdate'] = $row['on_update'];
if ($keys[$row['id']]['foreign'][0] == NULL) {
$keys[$row['id']]['foreign'] = NULL;
}
}
return array_values($keys);
}
/**
* @return bool
*/
public function isSupported($item)
{
return FALSE;
}
}
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