summaryrefslogtreecommitdiffstats
path: root/system/database/drivers/sqlite
diff options
context:
space:
mode:
Diffstat (limited to 'system/database/drivers/sqlite')
-rw-r--r--system/database/drivers/sqlite/sqlite_driver.php203
-rw-r--r--system/database/drivers/sqlite/sqlite_forge.php234
-rw-r--r--system/database/drivers/sqlite/sqlite_result.php30
-rw-r--r--system/database/drivers/sqlite/sqlite_utility.php11
4 files changed, 189 insertions, 289 deletions
diff --git a/system/database/drivers/sqlite/sqlite_driver.php b/system/database/drivers/sqlite/sqlite_driver.php
index 5021deb63..8c706c242 100644
--- a/system/database/drivers/sqlite/sqlite_driver.php
+++ b/system/database/drivers/sqlite/sqlite_driver.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
@@ -24,12 +24,13 @@
* @since Version 1.0
* @filesource
*/
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* 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
@@ -40,22 +41,23 @@
*/
class CI_DB_sqlite_driver extends CI_DB {
+ /**
+ * Database driver
+ *
+ * @var string
+ */
public $dbdriver = 'sqlite';
- // The character used to escape with - not needed for SQLite
- protected $_escape_char = '';
-
- // clause and character used for LIKE escape sequences
- 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.
+ * ORDER BY random keyword
+ *
+ * @var array
*/
- protected $_count_string = 'SELECT COUNT(*) AS ';
- protected $_random_keyword = ' Random()'; // database specific random keyword
+ protected $_random_keyword = array('RANDOM()', 'RANDOM()');
+
+ // --------------------------------------------------------------------
/**
* Non-persistent database connection
@@ -122,12 +124,14 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Execute the query
*
- * @param string an SQL query
+ * @param string $sql an SQL query
* @return resource
*/
protected function _execute($sql)
{
- return @sqlite_query($this->conn_id, $sql);
+ return $this->is_write_type($sql)
+ ? @sqlite_exec($this->conn_id, $sql)
+ : @sqlite_query($this->conn_id, $sql);
}
// --------------------------------------------------------------------
@@ -135,17 +139,13 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Begin Transaction
*
+ * @param bool $test_mode
* @return bool
*/
public function trans_begin($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;
}
@@ -153,7 +153,7 @@ 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;
@@ -168,13 +168,8 @@ class CI_DB_sqlite_driver extends CI_DB {
*/
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;
}
@@ -192,13 +187,8 @@ class CI_DB_sqlite_driver extends CI_DB {
*/
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;
}
@@ -212,8 +202,8 @@ class CI_DB_sqlite_driver extends CI_DB {
/**
* Escape String
*
- * @param string
- * @param bool whether or not the string will be used in a LIKE condition
+ * @param string $str
+ * @param bool $like Whether or not the string will be used in a LIKE condition
* @return string
*/
public function escape_str($str, $like = FALSE)
@@ -268,50 +258,22 @@ class CI_DB_sqlite_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * "Count All" query
- *
- * Generates a platform-specific query string that counts all records in
- * the specified database
- *
- * @param string
- * @return string
- */
- public function count_all($table = '')
- {
- if ($table == '')
- {
- return 0;
- }
-
- $query = $this->query($this->_count_string.$this->protect_identifiers('numrows').' FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE));
- if ($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
*
- * @param bool
+ * @param bool $prefix_limit
* @return string
*/
protected function _list_tables($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;
}
@@ -322,7 +284,7 @@ class CI_DB_sqlite_driver extends CI_DB {
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @param string the table name
+ * @param string $table
* @return bool
*/
protected function _list_columns($table = '')
@@ -334,16 +296,41 @@ class CI_DB_sqlite_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Field data query
- *
- * Generates a platform-specific query so that the column data can be retrieved
+ * Returns an object with field data
*
- * @param string the table name
- * @return string
+ * @param string $table
+ * @return array
*/
- protected function _field_data($table)
+ public function field_data($table = '')
{
- return "SELECT * FROM ".$table." LIMIT 1";
+ if ($table === '')
+ {
+ return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
+ }
+
+ if (($query = $this->query('PRAGMA TABLE_INFO('.$this->protect_identifiers($table, TRUE, NULL, FALSE).')')) === FALSE)
+ {
+ return FALSE;
+ }
+
+ $query = $query->result_array();
+ if (empty($query))
+ {
+ return FALSE;
+ }
+
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]['name'];
+ $retval[$i]->type = $query[$i]['type'];
+ $retval[$i]->max_length = NULL;
+ $retval[$i]->default = $query[$i]['dflt_value'];
+ $retval[$i]->primary_key = isset($query[$i]['pk']) ? (int) $query[$i]['pk'] : 0;
+ }
+
+ return $retval;
}
// --------------------------------------------------------------------
@@ -366,34 +353,13 @@ class CI_DB_sqlite_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * From Tables
- *
- * This function implicitly groups FROM tables so there is no confusion
- * about operator precedence in harmony with SQL standards
- *
- * @param array
- * @return string
- */
- protected function _from_tables($tables)
- {
- if ( ! is_array($tables))
- {
- $tables = array($tables);
- }
-
- return '('.implode(', ', $tables).')';
- }
-
- // --------------------------------------------------------------------
-
- /**
* Replace statement
*
* Generates a platform-specific replace string from the supplied data
*
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
+ * @param string $table Table name
+ * @param array $keys INSERT keys
+ * @param array $values INSERT values
* @return string
*/
protected function _replace($table, $keys, $values)
@@ -408,10 +374,10 @@ class CI_DB_sqlite_driver extends CI_DB {
*
* Generates a platform-specific truncate string from the supplied data
*
- * If the database does not support the truncate() command,
+ * If the database does not support the TRUNCATE statement,
* then this function maps to 'DELETE FROM table'
*
- * @param string the table name
+ * @param string $table
* @return string
*/
protected function _truncate($table)
@@ -422,40 +388,13 @@ class CI_DB_sqlite_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Limit string
- *
- * Generates a platform-specific LIMIT clause
- *
- * @param string the sql query string
- * @param int the number of rows to limit the query to
- * @param int the offset value
- * @return string
- */
- protected function _limit($sql, $limit, $offset)
- {
- if ($offset == 0)
- {
- $offset = '';
- }
- else
- {
- $offset .= ", ";
- }
-
- return $sql."LIMIT ".$offset.$limit;
- }
-
- // --------------------------------------------------------------------
-
- /**
* Close DB Connection
*
- * @param resource
* @return void
*/
- protected function _close($conn_id)
+ protected function _close()
{
- @sqlite_close($conn_id);
+ @sqlite_close($this->conn_id);
}
}
diff --git a/system/database/drivers/sqlite/sqlite_forge.php b/system/database/drivers/sqlite/sqlite_forge.php
index dd6f0f78d..6ad583560 100644
--- a/system/database/drivers/sqlite/sqlite_forge.php
+++ b/system/database/drivers/sqlite/sqlite_forge.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
@@ -24,6 +24,7 @@
* @since Version 1.0
* @filesource
*/
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* SQLite Forge Class
@@ -35,9 +36,32 @@
class CI_DB_sqlite_forge extends CI_DB_forge {
/**
+ * CREATE TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_create_table_if = FALSE;
+
+ /**
+ * UNSIGNED support
+ *
+ * @var bool|array
+ */
+ protected $_unsigned = FALSE;
+
+ /**
+ * NULL value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_null = 'NULL';
+
+ // --------------------------------------------------------------------
+
+ /**
* Create database
*
- * @param string the database name
+ * @param string $db_name (ignored)
* @return bool
*/
public function create_database($db_name = '')
@@ -52,7 +76,7 @@ class CI_DB_sqlite_forge extends CI_DB_forge {
/**
* Drop database
*
- * @param string the database name (ignored)
+ * @param string $db_name (ignored)
* @return bool
*/
public function drop_database($db_name = '')
@@ -61,6 +85,14 @@ class CI_DB_sqlite_forge extends CI_DB_forge {
{
return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
}
+ elseif ( ! empty($this->db->data_cache['db_names']))
+ {
+ $key = array_search(strtolower($this->db->database), array_map('strtolower', $this->db->data_cache['db_names']), TRUE);
+ if ($key !== FALSE)
+ {
+ unset($this->db->data_cache['db_names'][$key]);
+ }
+ }
return TRUE;
}
@@ -68,163 +100,95 @@ class CI_DB_sqlite_forge extends CI_DB_forge {
// --------------------------------------------------------------------
/**
- * Create Table
+ * ALTER TABLE
*
- * @param string the table name
- * @param array the fields
- * @param mixed primary key(s)
- * @param mixed key(s)
- * @param bool should 'IF NOT EXISTS' be added to the SQL
- * @return bool
+ * @todo implement drop_column(), modify_column()
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
*/
- protected function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
+ protected function _alter_table($alter_type, $table, $field)
{
- $sql = 'CREATE TABLE ';
-
- // IF NOT EXISTS added to SQLite in 3.3.0
- if ($if_not_exists === TRUE && version_compare($this->db->version(), '3.3.0', '>=') === TRUE)
- {
- $sql .= 'IF NOT EXISTS ';
- }
-
- $sql .= $this->db->escape_identifiers($table).' (';
- $current_field_count = 0;
-
- foreach ($fields as $field => $attributes)
+ if ($alter_type === 'DROP' OR $alter_type === 'CHANGE')
{
- // Numeric field names aren't allowed in databases, so if the key is
- // numeric, we know it was assigned by PHP and the developer manually
- // entered the field information, so we'll simply add it to the list
- if (is_numeric($field))
- {
- $sql .= "\n\t$attributes";
- }
- else
- {
- $attributes = array_change_key_case($attributes, CASE_UPPER);
-
- $sql .= "\n\t".$this->db->protect_identifiers($field);
-
- $sql .= ' '.$attributes['TYPE'];
-
- if (array_key_exists('CONSTRAINT', $attributes))
- {
- $sql .= '('.$attributes['CONSTRAINT'].')';
- }
-
- if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
- {
- $sql .= ' UNSIGNED';
- }
-
- if (array_key_exists('DEFAULT', $attributes))
- {
- $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
- }
-
- if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
- {
- $sql .= ' NULL';
- }
- else
- {
- $sql .= ' NOT NULL';
- }
-
- if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
- {
- $sql .= ' AUTO_INCREMENT';
- }
- }
-
- // don't add a comma on the end of the last field
- if (++$current_field_count < count($fields))
- {
- $sql .= ',';
- }
- }
+ // drop_column():
+ // BEGIN TRANSACTION;
+ // CREATE TEMPORARY TABLE t1_backup(a,b);
+ // INSERT INTO t1_backup SELECT a,b FROM t1;
+ // DROP TABLE t1;
+ // CREATE TABLE t1(a,b);
+ // INSERT INTO t1 SELECT a,b FROM t1_backup;
+ // DROP TABLE t1_backup;
+ // COMMIT;
- if (count($primary_keys) > 0)
- {
- $primary_keys = $this->db->protect_identifiers($primary_keys);
- $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
+ return FALSE;
}
- if (is_array($keys) && count($keys) > 0)
- {
- foreach ($keys as $key)
- {
- if (is_array($key))
- {
- $key = $this->db->protect_identifiers($key);
- }
- else
- {
- $key = array($this->db->protect_identifiers($key));
- }
-
- $sql .= ",\n\tUNIQUE (" . implode(', ', $key) . ")";
- }
- }
+ return parent::_alter_table($alter_type, $table, $field);
+ }
- $sql .= "\n)";
+ // --------------------------------------------------------------------
- return $sql;
+ /**
+ * Process column
+ *
+ * @param array $field
+ * @return string
+ */
+ protected function _process_column($field)
+ {
+ return $this->db->escape_identifiers($field['name'])
+ .' '.$field['type']
+ .$field['auto_increment']
+ .$field['null']
+ .$field['unique']
+ .$field['default'];
}
// --------------------------------------------------------------------
/**
- * Alter table query
+ * Field attribute TYPE
*
- * Generates a platform-specific query so that a table can be altered
- * Called by add_column(), drop_column(), and column_alter(),
+ * Performs a data type mapping between different databases.
*
- * @param string the ALTER type (ADD, DROP, CHANGE)
- * @param string the column name
- * @param string the table name
- * @param string the column definition
- * @param string the default value
- * @param bool should 'NOT NULL' be added
- * @param string the field after which we should add the new field
- * @return string
+ * @param array &$attributes
+ * @return void
*/
- protected function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
+ protected function _attr_type(&$attributes)
{
- $sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' '.$this->db->protect_identifiers($column_name);
-
- // DROP has everything it needs now.
- if ($alter_type == 'DROP')
+ switch (strtoupper($attributes['TYPE']))
{
- // SQLite does not support dropping columns
- // http://www.sqlite.org/omitted.html
- // http://www.sqlite.org/faq.html#q11
- return FALSE;
+ case 'ENUM':
+ case 'SET':
+ $attributes['TYPE'] = 'TEXT';
+ return;
+ default: return;
}
+ }
- $sql .= " $column_definition";
-
- if ($default_value != '')
- {
- $sql .= " DEFAULT \"$default_value\"";
- }
+ // --------------------------------------------------------------------
- if ($null === NULL)
- {
- $sql .= ' NULL';
- }
- else
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
{
- $sql .= ' NOT NULL';
- }
+ $field['type'] = 'INTEGER PRIMARY KEY';
+ $field['default'] = '';
+ $field['null'] = '';
+ $field['unique'] = '';
+ $field['auto_increment'] = ' AUTOINCREMENT';
- if ($after_field != '')
- {
- return $sql.' AFTER '.$this->db->protect_identifiers($after_field);
+ $this->primary_keys = array();
}
-
- return $sql;
-
}
}
diff --git a/system/database/drivers/sqlite/sqlite_result.php b/system/database/drivers/sqlite/sqlite_result.php
index 741dc9d8d..889757dea 100644
--- a/system/database/drivers/sqlite/sqlite_result.php
+++ b/system/database/drivers/sqlite/sqlite_result.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
@@ -24,6 +24,7 @@
* @since Version 1.0
* @filesource
*/
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* SQLite Result Class
@@ -33,6 +34,7 @@
* @category Database
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/database/
+ * @since 1.3
*/
class CI_DB_sqlite_result extends CI_DB_result {
@@ -43,7 +45,9 @@ class CI_DB_sqlite_result extends CI_DB_result {
*/
public function num_rows()
{
- return @sqlite_num_rows($this->result_id);
+ return is_int($this->num_rows)
+ ? $this->num_rows
+ : $this->num_rows = @sqlite_num_rows($this->result_id);
}
// --------------------------------------------------------------------
@@ -94,10 +98,8 @@ class CI_DB_sqlite_result extends CI_DB_result {
{
$retval[$i] = new stdClass();
$retval[$i]->name = sqlite_field_name($this->result_id, $i);
- $retval[$i]->type = 'varchar';
- $retval[$i]->max_length = 0;
- $retval[$i]->primary_key = 0;
- $retval[$i]->default = '';
+ $retval[$i]->type = NULL;
+ $retval[$i]->max_length = NULL;
}
return $retval;
@@ -110,11 +112,12 @@ class CI_DB_sqlite_result extends CI_DB_result {
*
* Moves the internal pointer to the desired offset. We call
* this internally before fetching results to make sure the
- * result set starts at zero
+ * result set starts at zero.
*
+ * @param int $n
* @return bool
*/
- protected function _data_seek($n = 0)
+ public function data_seek($n = 0)
{
return sqlite_seek($this->result_id, $n);
}
@@ -140,17 +143,12 @@ class CI_DB_sqlite_result extends CI_DB_result {
*
* Returns the result set as an object
*
+ * @param string $class_name
* @return object
*/
- protected function _fetch_object()
+ protected function _fetch_object($class_name = 'stdClass')
{
- if (function_exists('sqlite_fetch_object'))
- {
- return sqlite_fetch_object($this->result_id);
- }
-
- $arr = sqlite_fetch_array($this->result_id, SQLITE_ASSOC);
- return is_array($arr) ? (object) $arr : FALSE;
+ return sqlite_fetch_object($this->result_id, $class_name);
}
}
diff --git a/system/database/drivers/sqlite/sqlite_utility.php b/system/database/drivers/sqlite/sqlite_utility.php
index 1bcb42d9f..222d02712 100644
--- a/system/database/drivers/sqlite/sqlite_utility.php
+++ b/system/database/drivers/sqlite/sqlite_utility.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
@@ -24,6 +24,7 @@
* @since Version 1.0
* @filesource
*/
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* SQLite Utility Class
@@ -34,18 +35,16 @@
*/
class CI_DB_sqlite_utility extends CI_DB_utility {
- protected $_list_databases = FALSE;
-
/**
- * SQLite Export
+ * Export
*
- * @param array Preferences
+ * @param array $params Preferences
* @return mixed
*/
protected function _backup($params = array())
{
// Currently unsupported
- return $this->db->display_error('db_unsuported_feature');
+ return $this->db->display_error('db_unsupported_feature');
}
}
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-07-19 05:06:44 +0200