Query/docs/files/drivers/sqlite/sqlite_util.php.txt

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2014-04-15 16:13:18 -04:00
<?php
/**
* Query
*
* Free Query Builder / Database Abstraction Layer
*
* @package Query
* @author Timothy J. Warren
* @copyright Copyright (c) 2012 - 2014
* @link https://github.com/aviat4ion/Query
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
namespace Query\Driver;
/**
* SQLite-specific backup, import and creation methods
*
* @package Query
* @subpackage Drivers
* @method mixed query(string $sql)
* @method string quote(string $str)
*/
class SQLite_Util extends Abstract_Util {
/**
* Create an SQL backup file for the current database's data
*
* @param array $excluded
* @return string
*/
public function backup_data($excluded=array())
{
// Get a list of all the objects
$sql = 'SELECT DISTINCT "name"
FROM "sqlite_master"
WHERE "type"=\'table\'';
if( ! empty($excluded))
{
$sql .= " AND \"name\" NOT IN('".implode("','", $excluded)."')";
}
$res = $this->query($sql);
$result = $res->fetchAll(\PDO::FETCH_ASSOC);
unset($res);
$output_sql = '';
// Get the data for each object
foreach($result as $r)
{
$sql = 'SELECT * FROM "'.$r['name'].'"';
$res = $this->query($sql);
$obj_res = $res->fetchAll(\PDO::FETCH_ASSOC);
unset($res);
// If the row is empty, continue;
if (empty($obj_res)) continue;
// Nab the column names by getting the keys of the first row
$columns = array_keys(current($obj_res));
$insert_rows = array();
// Create the insert statements
foreach($obj_res as $row)
{
$row = array_values($row);
// Quote values as needed by type
for($i=0, $icount=count($row); $i<$icount; $i++)
{
$row[$i] = (is_numeric($row[$i])) ? $row[$i] : $this->quote($row[$i]);
}
$row_string = 'INSERT INTO "'.$r['name'].'" ("'.implode('","', $columns).'") VALUES ('.implode(',', $row).');';
unset($row);
$insert_rows[] = $row_string;
}
unset($obj_res);
$output_sql .= "\n\n".implode("\n", $insert_rows);
}
return $output_sql;
}
// --------------------------------------------------------------------------
/**
* Create an SQL backup file for the current database's structure
*
* @return string
*/
public function backup_structure()
{
// Fairly easy for SQLite...just query the master table
$sql = 'SELECT "sql" FROM "sqlite_master"';
$res = $this->query($sql);
$result = $res->fetchAll(\PDO::FETCH_ASSOC);
$sql_array = array();
foreach($result as $r)
{
$sql_array[] = $r['sql'];
}
$sql_structure = implode(";\n", $sql_array) . ";";
return $sql_structure;
}
}
// End of sqlite_util.php