<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class CI_DB_sqlite_driver extends CI_DB {
var $dbdriver = 'sqlite';
var $_escape_char = '';
var $_like_escape_str = " ESCAPE '%s' ";
var $_like_escape_chr = '!';
var $_count_string = "SELECT COUNT(*) AS ";
var $_random_keyword = ' Random()';
function db_connect()
{
if ( ! $conn_id = @sqlite_open($this->database, FILE_WRITE_MODE, $error))
{
log_message('error', $error);
if ($this->db_debug)
{
$this->display_error($error, '', TRUE);
}
return FALSE;
}
return $conn_id;
}
function db_pconnect()
{
if ( ! $conn_id = @sqlite_popen($this->database, FILE_WRITE_MODE, $error))
{
log_message('error', $error);
if ($this->db_debug)
{
$this->display_error($error, '', TRUE);
}
return FALSE;
}
return $conn_id;
}
function reconnect()
{
}
function db_select()
{
return TRUE;
}
function db_set_charset($charset, $collation)
{
return TRUE;
}
function _version()
{
return sqlite_libversion();
}
function _execute($sql)
{
$sql = $this->_prep_query($sql);
return @sqlite_query($this->conn_id, $sql);
}
function _prep_query($sql)
{
return $sql;
}
function trans_begin($test_mode = FALSE)
{
if ( ! $this->trans_enabled)
{
return TRUE;
}
if ($this->_trans_depth > 0)
{
return TRUE;
}
$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
$this->simple_query('BEGIN TRANSACTION');
return TRUE;
}
function trans_commit()
{
if ( ! $this->trans_enabled)
{
return TRUE;
}
if ($this->_trans_depth > 0)
{
return TRUE;
}
$this->simple_query('COMMIT');
return TRUE;
}
function trans_rollback()
{
if ( ! $this->trans_enabled)
{
return TRUE;
}
if ($this->_trans_depth > 0)
{
return TRUE;
}
$this->simple_query('ROLLBACK');
return TRUE;
}
function escape_str($str, $like = FALSE)
{
if (is_array($str))
{
foreach ($str as $key => $val)
{
$str[$key] = $this->escape_str($val, $like);
}
return $str;
}
$str = sqlite_escape_string($str);
if ($like === TRUE)
{
$str = str_replace( array('%', '_', $this->_like_escape_chr),
array($this->_like_escape_chr.'%', $this->_like_escape_chr.'_', $this->_like_escape_chr.$this->_like_escape_chr),
$str);
}
return $str;
}
function affected_rows()
{
return sqlite_changes($this->conn_id);
}
function insert_id()
{
return @sqlite_last_insert_rowid($this->conn_id);
}
function count_all($table = '')
{
if ($table == '')
{
return 0;
}
$query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));
if ($query->num_rows() == 0)
{
return 0;
}
$row = $query->row();
$this->_reset_select();
return (int) $row->numrows;
}
function _list_tables($prefix_limit = FALSE)
{
$sql = "SELECT name from sqlite_master WHERE type='table'";
if ($prefix_limit !== FALSE AND $this->dbprefix != '')
{
$sql .= " AND 'name' LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
}
return $sql;
}
function _list_columns($table = '')
{
return FALSE;
}
function _field_data($table)
{
return "SELECT * FROM ".$table." LIMIT 1";
}
function _error_message()
{
return sqlite_error_string(sqlite_last_error($this->conn_id));
}
function _error_number()
{
return sqlite_last_error($this->conn_id);
}
function _escape_identifiers($item)
{
if ($this->_escape_char == '')
{
return $item;
}
foreach ($this->_reserved_identifiers as $id)
{
if (strpos($item, '.'.$id) !== FALSE)
{
$str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
}
}
if (strpos($item, '.') !== FALSE)
{
$str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char;
}
else
{
$str = $this->_escape_char.$item.$this->_escape_char;
}
return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
}
function _from_tables($tables)
{
if ( ! is_array($tables))
{
$tables = array($tables);
}
return '('.implode(', ', $tables).')';
}
function _insert($table, $keys, $values)
{
return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
}
function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
{
foreach ($values as $key => $val)
{
$valstr[] = $key." = ".$val;
}
$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
$orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
$sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
$sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
$sql .= $orderby.$limit;
return $sql;
}
function _truncate($table)
{
return $this->_delete($table);
}
function _delete($table, $where = array(), $like = array(), $limit = FALSE)
{
$conditions = '';
if (count($where) > 0 OR count($like) > 0)
{
$conditions = "\nWHERE ";
$conditions .= implode("\n", $this->ar_where);
if (count($where) > 0 && count($like) > 0)
{
$conditions .= " AND ";
}
$conditions .= implode("\n", $like);
}
$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
return "DELETE FROM ".$table.$conditions.$limit;
}
function _limit($sql, $limit, $offset)
{
if ($offset == 0)
{
$offset = '';
}
else
{
$offset .= ", ";
}
return $sql."LIMIT ".$offset.$limit;
}
function _close($conn_id)
{
@sqlite_close($conn_id);
}
}