Improve the SQLite database driver
diff --git a/system/database/drivers/sqlite/sqlite_driver.php b/system/database/drivers/sqlite/sqlite_driver.php
index 28c3cae..96458e0 100644
--- a/system/database/drivers/sqlite/sqlite_driver.php
+++ b/system/database/drivers/sqlite/sqlite_driver.php
@@ -1,13 +1,13 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* NOTICE OF LICENSE
- *
+ *
* Licensed under the Open Software License version 3.0
- *
+ *
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
@@ -25,10 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
-
-
/**
* SQLite Database Adapter Class
*
@@ -44,30 +40,29 @@
*/
class CI_DB_sqlite_driver extends CI_DB {
- var $dbdriver = 'sqlite';
+ public $dbdriver = 'sqlite';
// The character used to escape with - not needed for SQLite
- var $_escape_char = '';
+ protected $_escape_char = '';
// clause and character used for LIKE escape sequences
- var $_like_escape_str = " ESCAPE '%s' ";
- var $_like_escape_chr = '!';
+ protected $_like_escape_str = ' ESCAPE \'%s\' ';
+ protected $_like_escape_chr = '!';
/**
* The syntax to count rows is slightly different across different
* database engines, so this string appears in each driver and is
* used for the count_all() and count_all_results() functions.
*/
- var $_count_string = "SELECT COUNT(*) AS ";
- var $_random_keyword = ' Random()'; // database specific random keyword
+ protected $_count_string = 'SELECT COUNT(*) AS ';
+ protected $_random_keyword = ' Random()'; // database specific random keyword
/**
* Non-persistent database connection
*
- * @access private called by the base class
* @return resource
*/
- function db_connect()
+ public function db_connect()
{
if ( ! $conn_id = @sqlite_open($this->database, FILE_WRITE_MODE, $error))
{
@@ -89,10 +84,9 @@
/**
* Persistent database connection
*
- * @access private called by the base class
* @return resource
*/
- function db_pconnect()
+ public function db_pconnect()
{
if ( ! $conn_id = @sqlite_popen($this->database, FILE_WRITE_MODE, $error))
{
@@ -117,12 +111,11 @@
* Keep / reestablish the db connection if no queries have been
* sent for a length of time exceeding the server's idle timeout
*
- * @access public
* @return void
*/
- function reconnect()
+ public function reconnect()
{
- // not implemented in SQLite
+ // Not supported in SQLite
}
// --------------------------------------------------------------------
@@ -130,11 +123,11 @@
/**
* Select the database
*
- * @access private called by the base class
- * @return resource
+ * @return bool
*/
- function db_select()
+ public function db_select()
{
+ // Not needed, in SQLite every pseudo-connection is a database
return TRUE;
}
@@ -143,14 +136,13 @@
/**
* Set client character set
*
- * @access public
* @param string
* @param string
- * @return resource
+ * @return bool
*/
- function db_set_charset($charset, $collation)
+ public function db_set_charset($charset, $collation)
{
- // @todo - add support if needed
+ // Not supported
return TRUE;
}
@@ -159,10 +151,9 @@
/**
* Version number query string
*
- * @access public
* @return string
*/
- function _version()
+ public function _version()
{
return sqlite_libversion();
}
@@ -172,13 +163,18 @@
/**
* Execute the query
*
- * @access private called by the base class
* @param string an SQL query
* @return resource
*/
- function _execute($sql)
+ protected function _execute($sql)
{
$sql = $this->_prep_query($sql);
+
+ if ( ! preg_match('/^(SELECT|EXPLAIN).+$/i', ltrim($sql)))
+ {
+ return @sqlite_exec($this->conn_id, $sql);
+ }
+
return @sqlite_query($this->conn_id, $sql);
}
@@ -189,11 +185,10 @@
*
* If needed, each database adapter can prep the query string
*
- * @access private called by execute()
* @param string an SQL query
* @return string
*/
- function _prep_query($sql)
+ protected function _prep_query($sql)
{
return $sql;
}
@@ -203,18 +198,12 @@
/**
* Begin Transaction
*
- * @access public
* @return bool
*/
- function trans_begin($test_mode = FALSE)
+ public function trans_begin($test_mode = FALSE)
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -222,7 +211,7 @@
// Reset the transaction failure flag.
// If the $test_mode flag is set to TRUE transactions will be rolled back
// even if the queries produce a successful result.
- $this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
+ $this->_trans_failure = ($test_mode === TRUE);
$this->simple_query('BEGIN TRANSACTION');
return TRUE;
@@ -233,18 +222,12 @@
/**
* Commit Transaction
*
- * @access public
* @return bool
*/
- function trans_commit()
+ public function trans_commit()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -258,18 +241,12 @@
/**
* Rollback Transaction
*
- * @access public
* @return bool
*/
- function trans_rollback()
+ public function trans_rollback()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -283,12 +260,11 @@
/**
* Escape String
*
- * @access public
* @param string
* @param bool whether or not the string will be used in a LIKE condition
* @return string
*/
- function escape_str($str, $like = FALSE)
+ public function escape_str($str, $like = FALSE)
{
if (is_array($str))
{
@@ -305,9 +281,9 @@
// escape LIKE condition wildcards
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_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 $str;
@@ -318,10 +294,9 @@
/**
* Affected Rows
*
- * @access public
- * @return integer
+ * @return int
*/
- function affected_rows()
+ public function affected_rows()
{
return sqlite_changes($this->conn_id);
}
@@ -331,10 +306,9 @@
/**
* Insert ID
*
- * @access public
- * @return integer
+ * @return int
*/
- function insert_id()
+ public function insert_id()
{
return @sqlite_last_insert_rowid($this->conn_id);
}
@@ -347,27 +321,25 @@
* Generates a platform-specific query string that counts all records in
* the specified database
*
- * @access public
* @param string
- * @return string
+ * @return int
*/
- function count_all($table = '')
+ public 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));
-
+ $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();
+ $query = $query->row();
$this->_reset_select();
- return (int) $row->numrows;
+ return (int) $query->numrows;
}
// --------------------------------------------------------------------
@@ -377,18 +349,18 @@
*
* Generates a platform-specific query string so that the table names can be fetched
*
- * @access private
- * @param boolean
+ * @param bool
* @return string
*/
- function _list_tables($prefix_limit = FALSE)
+ protected function _list_tables($prefix_limit = FALSE)
{
- $sql = "SELECT name from sqlite_master WHERE type='table'";
+ $sql = "SELECT name FROM sqlite_master WHERE type='table'";
- if ($prefix_limit !== FALSE AND $this->dbprefix != '')
+ if ($prefix_limit !== FALSE && $this->dbprefix != '')
{
- $sql .= " AND 'name' LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ return $sql." AND 'name' LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
}
+
return $sql;
}
@@ -399,11 +371,10 @@
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @access public
* @param string the table name
- * @return string
+ * @return bool
*/
- function _list_columns($table = '')
+ protected function _list_columns($table = '')
{
// Not supported
return FALSE;
@@ -416,13 +387,12 @@
*
* Generates a platform-specific query so that the column data can be retrieved
*
- * @access public
* @param string the table name
- * @return object
+ * @return string
*/
- function _field_data($table)
+ protected function _field_data($table)
{
- return "SELECT * FROM ".$table." LIMIT 1";
+ return 'SELECT * FROM '.$table.' LIMIT 1';
}
// --------------------------------------------------------------------
@@ -430,10 +400,9 @@
/**
* The error message string
*
- * @access private
* @return string
*/
- function _error_message()
+ protected function _error_message()
{
return sqlite_error_string(sqlite_last_error($this->conn_id));
}
@@ -443,10 +412,9 @@
/**
* The error message number
*
- * @access private
- * @return integer
+ * @return int
*/
- function _error_number()
+ protected function _error_number()
{
return sqlite_last_error($this->conn_id);
}
@@ -458,11 +426,10 @@
*
* This function escapes column and table names
*
- * @access private
* @param string
* @return string
*/
- function _escape_identifiers($item)
+ public function _escape_identifiers($item)
{
if ($this->_escape_char == '')
{
@@ -473,24 +440,20 @@
{
if (strpos($item, '.'.$id) !== FALSE)
{
- $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
+ $item = str_replace('.', $this->_escape_char.'.', $item);
// remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
}
}
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;
+ $item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
}
// remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
}
// --------------------------------------------------------------------
@@ -501,11 +464,10 @@
* This function implicitly groups FROM tables so there is no confusion
* about operator precedence in harmony with SQL standards
*
- * @access public
* @param type
* @return type
*/
- function _from_tables($tables)
+ protected function _from_tables($tables)
{
if ( ! is_array($tables))
{
@@ -522,15 +484,14 @@
*
* Generates a platform-specific insert string from the supplied data
*
- * @access public
* @param string the table name
* @param array the insert keys
* @param array the insert values
* @return string
*/
- function _insert($table, $keys, $values)
+ protected function _insert($table, $keys, $values)
{
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
}
// --------------------------------------------------------------------
@@ -540,7 +501,6 @@
*
* Generates a platform-specific update string from the supplied data
*
- * @access public
* @param string the table name
* @param array the update data
* @param array the where clause
@@ -548,24 +508,17 @@
* @param array the limit clause
* @return string
*/
- function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
+ protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
{
foreach ($values as $key => $val)
{
- $valstr[] = $key." = ".$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 $sql;
+ return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
+ .(($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '')
+ .(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
+ .( ! $limit ? '' : ' LIMIT '.$limit);
}
@@ -578,11 +531,10 @@
* If the database does not support the truncate() command
* This function maps to "DELETE FROM table"
*
- * @access public
* @param string the table name
* @return string
*/
- function _truncate($table)
+ protected function _truncate($table)
{
return $this->_delete($table);
}
@@ -594,31 +546,27 @@
*
* Generates a platform-specific delete string from the supplied data
*
- * @access public
* @param string the table name
* @param array the where clause
* @param string the limit clause
* @return string
*/
- function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+ protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
{
$conditions = '';
if (count($where) > 0 OR count($like) > 0)
{
- $conditions = "\nWHERE ";
- $conditions .= implode("\n", $this->ar_where);
+ $conditions = "\nWHERE ".implode("\n", $this->ar_where);
if (count($where) > 0 && count($like) > 0)
{
- $conditions .= " AND ";
+ $conditions .= ' AND ';
}
$conditions .= implode("\n", $like);
}
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- return "DELETE FROM ".$table.$conditions.$limit;
+ return 'DELETE FROM '.$table.$conditions.( ! $limit ? '' : ' LIMIT '.$limit);
}
// --------------------------------------------------------------------
@@ -628,24 +576,14 @@
*
* Generates a platform-specific LIMIT clause
*
- * @access public
* @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
+ * @param int the number of rows to limit the query to
+ * @param int the offset value
* @return string
*/
- function _limit($sql, $limit, $offset)
+ protected function _limit($sql, $limit, $offset)
{
- if ($offset == 0)
- {
- $offset = '';
- }
- else
- {
- $offset .= ", ";
- }
-
- return $sql."LIMIT ".$offset.$limit;
+ return $sql.'LIMIT '.($offset == 0 ? '' : ', ').$limit;
}
// --------------------------------------------------------------------
@@ -653,11 +591,10 @@
/**
* Close DB Connection
*
- * @access public
* @param resource
* @return void
*/
- function _close($conn_id)
+ protected function _close($conn_id)
{
@sqlite_close($conn_id);
}
@@ -665,6 +602,5 @@
}
-
/* End of file sqlite_driver.php */
-/* Location: ./system/database/drivers/sqlite/sqlite_driver.php */
\ No newline at end of file
+/* Location: ./system/database/drivers/sqlite/sqlite_driver.php */