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-rw-r--r--system/database/drivers/sqlite/sqlite_driver.php416
1 files changed, 69 insertions, 347 deletions
diff --git a/system/database/drivers/sqlite/sqlite_driver.php b/system/database/drivers/sqlite/sqlite_driver.php
index 28c3caecd..3305f6030 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
+ * An open source application development framework for PHP 5.2.4 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:
@@ -25,15 +25,11 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
-
-
/**
* SQLite Database Adapter Class
*
* Note: _DB is an extender class that the app controller
- * creates dynamically based on whether the active record
+ * creates dynamically based on whether the query builder
* class is being used or not.
*
* @package CodeIgniter
@@ -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 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* 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, $error))
{
@@ -112,59 +106,15 @@ class CI_DB_sqlite_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Reconnect
- *
- * Keep / reestablish the db connection if no queries have been
- * sent for a length of time exceeding the server's idle timeout
- *
- * @access public
- * @return void
- */
- function reconnect()
- {
- // not implemented in SQLite
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Select the database
+ * Database version number
*
- * @access private called by the base class
- * @return resource
- */
- function db_select()
- {
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set client character set
- *
- * @access public
- * @param string
- * @param string
- * @return resource
- */
- function db_set_charset($charset, $collation)
- {
- // @todo - add support if needed
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Version number query string
- *
- * @access public
* @return string
*/
- function _version()
+ public function version()
{
- return sqlite_libversion();
+ return isset($this->data_cache['version'])
+ ? $this->data_cache['version']
+ : $this->data_cache['version'] = sqlite_libversion();
}
// --------------------------------------------------------------------
@@ -172,30 +122,14 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Execute the query
*
- * @access private called by the base class
* @param string an SQL query
* @return resource
*/
- function _execute($sql)
- {
- $sql = $this->_prep_query($sql);
- return @sqlite_query($this->conn_id, $sql);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Prep the query
- *
- * If needed, each database adapter can prep the query string
- *
- * @access private called by execute()
- * @param string an SQL query
- * @return string
- */
- function _prep_query($sql)
+ protected function _execute($sql)
{
- return $sql;
+ return $this->is_write_type($sql)
+ ? @sqlite_exec($this->conn_id, $sql)
+ : @sqlite_query($this->conn_id, $sql);
}
// --------------------------------------------------------------------
@@ -203,18 +137,12 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Begin Transaction
*
- * @access public
* @return bool
*/
- function trans_begin($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 +150,7 @@ class CI_DB_sqlite_driver extends CI_DB {
// 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 +161,12 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* 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 +180,12 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* 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 $this->_trans_depth > 0)
{
return TRUE;
}
@@ -283,12 +199,11 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Escape String
*
- * @access public
* @param string
* @param bool whether or not the string will be used in a LIKE condition
* @return string
*/
- function escape_str($str, $like = FALSE)
+ public function escape_str($str, $like = FALSE)
{
if (is_array($str))
{
@@ -305,9 +220,9 @@ class CI_DB_sqlite_driver extends CI_DB {
// 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 $str;
@@ -318,10 +233,9 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Affected Rows
*
- * @access public
- * @return integer
+ * @return int
*/
- function affected_rows()
+ public function affected_rows()
{
return sqlite_changes($this->conn_id);
}
@@ -331,10 +245,9 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Insert ID
*
- * @access public
- * @return integer
+ * @return int
*/
- function insert_id()
+ public function insert_id()
{
return @sqlite_last_insert_rowid($this->conn_id);
}
@@ -342,53 +255,22 @@ class CI_DB_sqlite_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * "Count All" query
- *
- * Generates a platform-specific query string that counts all records in
- * the specified database
- *
- * @access public
- * @param string
- * @return string
- */
- function count_all($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) $row->numrows;
- }
-
- // --------------------------------------------------------------------
-
- /**
* List table query
*
* Generates a platform-specific query string so that the table names can be fetched
*
- * @access private
- * @param boolean
+ * @param bool
* @return string
*/
- function _list_tables($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 $sql;
}
@@ -399,11 +281,10 @@ class CI_DB_sqlite_driver extends CI_DB {
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @access public
* @param string the table name
- * @return string
+ * @return bool
*/
- function _list_columns($table = '')
+ protected function _list_columns($table = '')
{
// Not supported
return FALSE;
@@ -416,209 +297,64 @@ class CI_DB_sqlite_driver extends CI_DB {
*
* Generates a platform-specific query so that the column data can be retrieved
*
- * @access public
* @param string the table name
- * @return object
- */
- function _field_data($table)
- {
- return "SELECT * FROM ".$table." LIMIT 1";
- }
-
- // --------------------------------------------------------------------
-
- /**
- * The error message string
- *
- * @access private
* @return string
*/
- function _error_message()
- {
- return sqlite_error_string(sqlite_last_error($this->conn_id));
- }
-
- // --------------------------------------------------------------------
-
- /**
- * The error message number
- *
- * @access private
- * @return integer
- */
- function _error_number()
+ protected function _field_data($table)
{
- return sqlite_last_error($this->conn_id);
+ return 'SELECT * FROM '.$this->escape_identifiers($table).' LIMIT 1';
}
// --------------------------------------------------------------------
/**
- * Escape the SQL Identifiers
+ * Error
*
- * This function escapes column and table names
+ * Returns an array containing code and message of the last
+ * database error that has occured.
*
- * @access private
- * @param string
- * @return string
+ * @return array
*/
- function _escape_identifiers($item)
+ public function error()
{
- if ($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.'.', $item);
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$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.$this->_escape_char;
- }
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ $error = array('code' => sqlite_last_error($this->conn_id));
+ $error['message'] = sqlite_error_string($error['code']);
+ return $error;
}
// --------------------------------------------------------------------
/**
- * From Tables
+ * Replace statement
*
- * This function implicitly groups FROM tables so there is no confusion
- * about operator precedence in harmony with SQL standards
+ * Generates a platform-specific replace string from the supplied data
*
- * @access public
- * @param type
- * @return type
- */
- function _from_tables($tables)
- {
- if ( ! is_array($tables))
- {
- $tables = array($tables);
- }
-
- return '('.implode(', ', $tables).')';
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Insert statement
- *
- * Generates a platform-specific insert string from the supplied data
- *
- * @access public
* @param string the table name
* @param array the insert keys
* @param array the insert values
* @return string
*/
- function _insert($table, $keys, $values)
- {
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Update statement
- *
- * Generates a platform-specific update string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the update data
- * @param array the where clause
- * @param array the orderby clause
- * @param array the limit clause
- * @return string
- */
- function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
+ protected function _replace($table, $keys, $values)
{
- foreach ($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 $sql;
+ return 'INSERT OR '.parent::_replace($table, $keys, $values);
}
-
// --------------------------------------------------------------------
/**
* Truncate statement
*
* Generates a platform-specific truncate string from the supplied data
- * If the database does not support the truncate() command
- * This function maps to "DELETE FROM table"
*
- * @access public
- * @param string the table name
- * @return string
- */
- function _truncate($table)
- {
- return $this->_delete($table);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Delete statement
- *
- * Generates a platform-specific delete string from the supplied data
+ * If the database does not support the truncate() command,
+ * then this function maps to 'DELETE FROM table'
*
- * @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(), $limit = FALSE)
+ protected function _truncate($table)
{
- $conditions = '';
-
- if (count($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.$limit;
+ return 'DELETE FROM '.$table;
}
// --------------------------------------------------------------------
@@ -628,24 +364,14 @@ class CI_DB_sqlite_driver extends CI_DB {
*
* 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 ? '' : $offset.', ').$limit;
}
// --------------------------------------------------------------------
@@ -653,18 +379,14 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Close DB Connection
*
- * @access public
- * @param resource
* @return void
*/
- function _close($conn_id)
+ protected function _close()
{
- @sqlite_close($conn_id);
+ @sqlite_close($this->conn_id);
}
-
}
-
/* End of file sqlite_driver.php */
/* Location: ./system/database/drivers/sqlite/sqlite_driver.php */ \ No newline at end of file