/**
 * remove all foreign key constraints and return
 * sql constraints query for full database
 *
 * @param array $tables_full            array of all tables in given db or dbs
 * @param instance $export_sql_plugin   export plugin instance
 * @param boolean $move                 whether databse name is empty or not
 * @param $db                           database name
 */
function PMA_getSqlConstraintsQueryForFullDb($tables_full, $export_sql_plugin, $move, $db)
{
    $sql_constraints_query_full_db = array();
    foreach ($tables_full as $each_table => $tmp) {
        $sql_constraints = '';
        $sql_drop_foreign_keys = '';
        $sql_structure = $export_sql_plugin->getTableDef($db, $each_table, "\n", '', false, false);
        if ($move && !empty($sql_drop_foreign_keys)) {
            PMA_DBI_query($sql_drop_foreign_keys);
        }
        // keep the constraint we just dropped
        if (!empty($sql_constraints)) {
            $sql_constraints_query_full_db[] = $sql_constraints;
        }
    }
    return $sql_constraints_query_full_db;
}