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-rw-r--r--system/database/drivers/oci8/oci8_driver.php399
1 files changed, 213 insertions, 186 deletions
diff --git a/system/database/drivers/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index c6621901b..007e56a0b 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_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:
@@ -25,8 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* oci8 Database Adapter Class
*
@@ -48,48 +46,127 @@
* permit access to oracle databases
*
* @author Kelly McArdle
- *
*/
class CI_DB_oci8_driver extends CI_DB {
- var $dbdriver = 'oci8';
+ public $dbdriver = 'oci8';
// The character used for excaping
- 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(1) AS ";
- var $_random_keyword = ' ASC'; // not currently supported
+ protected $_count_string = 'SELECT COUNT(1) AS ';
+ protected $_random_keyword = ' ASC'; // not currently supported
// Set "auto commit" by default
- var $_commit = OCI_COMMIT_ON_SUCCESS;
+ protected $_commit = OCI_COMMIT_ON_SUCCESS;
// need to track statement id and cursor id
- var $stmt_id;
- var $curs_id;
+ public $stmt_id;
+ public $curs_id;
// if we use a limit, we will add a field that will
// throw off num_fields later
- var $limit_used;
+ public $limit_used;
+
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ $valid_dsns = array(
+ 'tns' => '/^\(DESCRIPTION=(\(.+\)){2,}\)$/', // TNS
+ // Easy Connect string (Oracle 10g+)
+ 'ec' => '/^(\/\/)?[a-z0-9.:_-]+(:[1-9][0-9]{0,4})?(\/[a-z0-9$_]+)?(:[^\/])?(\/[a-z0-9$_]+)?$/i',
+ 'in' => '/^[a-z0-9$_]+$/i' // Instance name (defined in tnsnames.ora)
+ );
+
+ /* Space characters don't have any effect when actually
+ * connecting, but can be a hassle while validating the DSN.
+ */
+ $this->dsn = str_replace(array("\n", "\r", "\t", ' '), '', $this->dsn);
+
+ if ($this->dsn !== '')
+ {
+ foreach ($valid_dsns as $regexp)
+ {
+ if (preg_match($regexp, $this->dsn))
+ {
+ return;
+ }
+ }
+ }
+
+ // Legacy support for TNS in the hostname configuration field
+ $this->hostname = str_replace(array("\n", "\r", "\t", ' '), '', $this->hostname);
+ if (preg_match($valid_dsns['tns'], $this->hostname))
+ {
+ $this->dsn = $this->hostname;
+ return;
+ }
+ elseif ($this->hostname !== '' && strpos($this->hostname, '/') === FALSE && strpos($this->hostname, ':') === FALSE
+ && (( ! empty($this->port) && ctype_digit($this->port)) OR $this->database !== ''))
+ {
+ /* If the hostname field isn't empty, doesn't contain
+ * ':' and/or '/' and if port and/or database aren't
+ * empty, then the hostname field is most likely indeed
+ * just a hostname. Therefore we'll try and build an
+ * Easy Connect string from these 3 settings, assuming
+ * that the database field is a service name.
+ */
+ $this->dsn = $this->hostname
+ .(( ! empty($this->port) && ctype_digit($this->port)) ? ':'.$this->port : '')
+ .($this->database !== '' ? '/'.ltrim($this->database, '/') : '');
+
+ if (preg_match($valid_dsns['ec'], $this->dsn))
+ {
+ return;
+ }
+ }
+
+ /* At this point, we can only try and validate the hostname and
+ * database fields separately as DSNs.
+ */
+ if (preg_match($valid_dsns['ec'], $this->hostname) OR preg_match($valid_dsns['in'], $this->hostname))
+ {
+ $this->dsn = $this->hostname;
+ return;
+ }
+
+ $this->database = str_replace(array("\n", "\r", "\t", ' '), '', $this->database);
+ foreach ($valid_dsns as $regexp)
+ {
+ if (preg_match($regexp, $this->database))
+ {
+ return;
+ }
+ }
+
+ /* Well - OK, an empty string should work as well.
+ * PHP will try to use environment variables to
+ * determine which Oracle instance to connect to.
+ */
+ $this->dsn = '';
+ }
/**
* Non-persistent database connection
*
- * @access private called by the base class
- * @return resource
+ * @return resource
*/
public function db_connect()
{
- return @oci_connect($this->username, $this->password, $this->hostname, $this->char_set);
+ return ( ! empty($this->char_set))
+ ? @oci_connect($this->username, $this->password, $this->dsn, $this->char_set)
+ : @oci_connect($this->username, $this->password, $this->dsn);
}
// --------------------------------------------------------------------
@@ -97,12 +174,13 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Persistent database connection
*
- * @access private called by the base class
- * @return resource
+ * @return resource
*/
public function db_pconnect()
{
- return @oci_pconnect($this->username, $this->password, $this->hostname, $this->char_set);
+ return ( ! empty($this->char_set))
+ ? @oci_pconnect($this->username, $this->password, $this->dsn, $this->char_set)
+ : @oci_pconnect($this->username, $this->password, $this->dsn);
}
// --------------------------------------------------------------------
@@ -113,7 +191,6 @@ class CI_DB_oci8_driver extends CI_DB {
* Keep / reestablish the db connection if no queries have been
* sent for a length of time exceeding the server's idle timeout
*
- * @access public
* @return void
*/
public function reconnect()
@@ -127,8 +204,7 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Select the database
*
- * @access private called by the base class
- * @return resource
+ * @return resource
*/
public function db_select()
{
@@ -141,7 +217,6 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Set client character set
*
- * @access public
* @param string
* @param string
* @return resource
@@ -157,8 +232,7 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Version number query string
*
- * @access protected
- * @return string
+ * @return string
*/
protected function _version()
{
@@ -170,14 +244,14 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Execute the query
*
- * @access protected called by the base class
- * @param string an SQL query
- * @return resource
+ * @param string an SQL query
+ * @return resource
*/
protected function _execute($sql)
{
- // oracle must parse the query before it is run. All of the actions with
- // the query are based on the statement id returned by ociparse
+ /* Oracle must parse the query before it is run. All of the actions with
+ * the query are based on the statement id returned by oci_parse().
+ */
$this->stmt_id = FALSE;
$this->_set_stmt_id($sql);
oci_set_prefetch($this->stmt_id, 1000);
@@ -187,9 +261,8 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Generate a statement ID
*
- * @access private
- * @param string an SQL query
- * @return none
+ * @param string an SQL query
+ * @return void
*/
private function _set_stmt_id($sql)
{
@@ -206,9 +279,8 @@ class CI_DB_oci8_driver extends CI_DB {
*
* If needed, each database adapter can prep the query string
*
- * @access private called by execute()
- * @param string an SQL query
- * @return string
+ * @param string an SQL query
+ * @return string
*/
private function _prep_query($sql)
{
@@ -218,15 +290,13 @@ class CI_DB_oci8_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * getCursor. Returns a cursor from the datbase
+ * getCursor. Returns a cursor from the database
*
- * @access public
- * @return cursor id
+ * @return resource cursor id
*/
public function get_cursor()
{
- $this->curs_id = oci_new_cursor($this->conn_id);
- return $this->curs_id;
+ return $this->curs_id = oci_new_cursor($this->conn_id);
}
// --------------------------------------------------------------------
@@ -234,20 +304,19 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Stored Procedure. Executes a stored procedure
*
- * @access public
- * @param package package stored procedure is in
- * @param procedure stored procedure to execute
- * @param params array of parameters
- * @return array
+ * @param string package name in which the stored procedure is in
+ * @param string stored procedure name to execute
+ * @param array parameters
+ * @return mixed
*
* params array keys
*
* KEY OPTIONAL NOTES
- * name no the name of the parameter should be in :<param_name> format
- * value no the value of the parameter. If this is an OUT or IN OUT parameter,
- * this should be a reference to a variable
- * type yes the type of the parameter
- * length yes the max size of the parameter
+ * name no the name of the parameter should be in :<param_name> format
+ * value no the value of the parameter. If this is an OUT or IN OUT parameter,
+ * this should be a reference to a variable
+ * type yes the type of the parameter
+ * length yes the max size of the parameter
*/
public function stored_procedure($package, $procedure, $params)
{
@@ -262,24 +331,24 @@ class CI_DB_oci8_driver extends CI_DB {
}
// build the query string
- $sql = "begin $package.$procedure(";
+ $sql = 'BEGIN '.$package.'.'.$procedure.'(';
$have_cursor = FALSE;
foreach ($params as $param)
{
- $sql .= $param['name'] . ",";
+ $sql .= $param['name'].',';
- if (array_key_exists('type', $param) && ($param['type'] === OCI_B_CURSOR))
+ if (isset($param['type']) && $param['type'] === OCI_B_CURSOR)
{
$have_cursor = TRUE;
}
}
- $sql = trim($sql, ",") . "); end;";
+ $sql = trim($sql, ',') . '); END;';
$this->stmt_id = FALSE;
$this->_set_stmt_id($sql);
$this->_bind_params($params);
- $this->query($sql, FALSE, $have_cursor);
+ return $this->query($sql, FALSE, $have_cursor);
}
// --------------------------------------------------------------------
@@ -287,8 +356,7 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Bind parameters
*
- * @access private
- * @return none
+ * @return void
*/
private function _bind_params($params)
{
@@ -316,7 +384,6 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Begin Transaction
*
- * @access public
* @return bool
*/
public function trans_begin($test_mode = FALSE)
@@ -337,7 +404,7 @@ class CI_DB_oci8_driver extends CI_DB {
// even if the queries produce a successful result.
$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
- $this->_commit = OCI_DEFAULT;
+ $this->_commit = (is_php('5.3.2')) ? OCI_NO_AUTO_COMMIT : OCI_DEFAULT;
return TRUE;
}
@@ -346,7 +413,6 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Commit Transaction
*
- * @access public
* @return bool
*/
public function trans_commit()
@@ -362,9 +428,8 @@ class CI_DB_oci8_driver extends CI_DB {
return TRUE;
}
- $ret = oci_commit($this->conn_id);
$this->_commit = OCI_COMMIT_ON_SUCCESS;
- return $ret;
+ return oci_commit($this->conn_id);
}
// --------------------------------------------------------------------
@@ -372,25 +437,18 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Rollback Transaction
*
- * @access public
* @return bool
*/
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;
}
- $ret = oci_rollback($this->conn_id);
$this->_commit = OCI_COMMIT_ON_SUCCESS;
- return $ret;
+ return oci_rollback($this->conn_id);
}
// --------------------------------------------------------------------
@@ -398,10 +456,9 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Escape String
*
- * @access public
- * @param string
+ * @param string
* @param bool whether or not the string will be used in a LIKE condition
- * @return string
+ * @return string
*/
public function escape_str($str, $like = FALSE)
{
@@ -415,15 +472,14 @@ class CI_DB_oci8_driver extends CI_DB {
return $str;
}
- $str = remove_invisible_characters($str);
- $str = str_replace("'", "''", $str);
+ $str = str_replace("'", "''", remove_invisible_characters($str));
// 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.$this->_like_escape_chr, '%', '_'),
+ array($this->_like_escape_chr.$this->_like_escape_chr, $this->_like_escape_chr.'%', $this->_like_escape_chr.'_'),
+ $str);
}
return $str;
@@ -434,8 +490,7 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Affected Rows
*
- * @access public
- * @return integer
+ * @return int
*/
public function affected_rows()
{
@@ -447,8 +502,7 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Insert ID
*
- * @access public
- * @return integer
+ * @return int
*/
public function insert_id()
{
@@ -464,9 +518,8 @@ class CI_DB_oci8_driver extends CI_DB {
* Generates a platform-specific query string that counts all records in
* the specified database
*
- * @access public
- * @param string
- * @return string
+ * @param string
+ * @return int
*/
public function count_all($table = '')
{
@@ -475,7 +528,7 @@ class CI_DB_oci8_driver extends CI_DB {
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 == FALSE)
{
@@ -494,17 +547,16 @@ class CI_DB_oci8_driver extends CI_DB {
*
* Generates a platform-specific query string so that the table names can be fetched
*
- * @access protected
- * @param boolean
+ * @param bool
* @return string
*/
protected function _list_tables($prefix_limit = FALSE)
{
- $sql = "SELECT TABLE_NAME FROM ALL_TABLES";
+ $sql = 'SELECT TABLE_NAME FROM ALL_TABLES';
- if ($prefix_limit !== FALSE AND $this->dbprefix != '')
+ if ($prefix_limit !== FALSE && $this->dbprefix != '')
{
- $sql .= " WHERE TABLE_NAME LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ return $sql." WHERE TABLE_NAME LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
}
return $sql;
@@ -517,13 +569,12 @@ class CI_DB_oci8_driver extends CI_DB {
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @access protected
- * @param string the table name
- * @return string
+ * @param string the table name
+ * @return string
*/
protected function _list_columns($table = '')
{
- return "SELECT COLUMN_NAME FROM all_tab_columns WHERE table_name = '$table'";
+ return 'SELECT COLUMN_NAME FROM all_tab_columns WHERE table_name = \''.$table.'\'';
}
// --------------------------------------------------------------------
@@ -533,13 +584,12 @@ class CI_DB_oci8_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
+ * @param string the table name
+ * @return string
*/
protected function _field_data($table)
{
- return "SELECT * FROM ".$table." where rownum = 1";
+ return 'SELECT * FROM '.$table.' WHERE rownum = 1';
}
// --------------------------------------------------------------------
@@ -547,13 +597,11 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* The error message string
*
- * @access protected
- * @return string
+ * @return string
*/
protected function _error_message()
{
- // If the error was during connection, no conn_id should be passed
- $error = is_resource($this->conn_id) ? oci_error($this->conn_id) : oci_error();
+ $error = self::_get_error_data();
return $error['message'];
}
@@ -562,28 +610,48 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* The error message number
*
- * @access protected
- * @return integer
+ * @return int
*/
protected function _error_number()
{
- // Same as _error_message()
- $error = is_resource($this->conn_id) ? oci_error($this->conn_id) : oci_error();
+ $error = self::_get_error_data();
return $error['code'];
}
// --------------------------------------------------------------------
+ /* Get error data
+ *
+ * Used by _error_message() and _error_number()
+ *
+ * @return array
+ */
+ private function _get_error_data()
+ {
+ $res = NULL;
+ foreach (array('curs_id', 'stmt_id', 'conn_id') as $key)
+ {
+ if (is_resource($this->$key))
+ {
+ $res = $this->$key;
+ break;
+ }
+ }
+
+ return ( ! is_null($res)) ? oci_error($res) : oci_error();
+ }
+
+ // --------------------------------------------------------------------
+
/**
* Escape the SQL Identifiers
*
* This function escapes column and table names
*
- * @access protected
* @param string
* @return string
*/
- protected function _escape_identifiers($item)
+ public function _escape_identifiers($item)
{
if ($this->_escape_char == '')
{
@@ -594,24 +662,20 @@ class CI_DB_oci8_driver extends CI_DB {
{
if (strpos($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.$this->_escape_char);
}
// --------------------------------------------------------------------
@@ -622,18 +686,12 @@ class CI_DB_oci8_driver extends CI_DB {
* This function implicitly groups FROM tables so there is no confusion
* about operator precedence in harmony with SQL standards
*
- * @access protected
- * @param type
- * @return type
+ * @param array
+ * @return string
*/
protected function _from_tables($tables)
{
- if ( ! is_array($tables))
- {
- $tables = array($tables);
- }
-
- return implode(', ', $tables);
+ return is_array($tables) ? implode(', ', $tables) : $tables;
}
// --------------------------------------------------------------------
@@ -643,15 +701,14 @@ class CI_DB_oci8_driver extends CI_DB {
*
* Generates a platform-specific insert string from the supplied data
*
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
+ * @param string the table name
+ * @param array the insert keys
+ * @param array the insert values
+ * @return string
*/
protected function _insert($table, $keys, $values)
{
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
}
// --------------------------------------------------------------------
@@ -673,12 +730,10 @@ class CI_DB_oci8_driver extends CI_DB {
for ($i = 0, $c = count($values); $i < $c; $i++)
{
- $sql .= ' INTO ' . $table . ' (' . $keys . ') VALUES ' . $values[$i] . "\n";
+ $sql .= ' INTO '.$table.' ('.$keys.') VALUES '.$values[$i].'\n';
}
- $sql .= 'SELECT * FROM dual';
-
- return $sql;
+ return $sql.'SELECT * FROM dual';
}
// --------------------------------------------------------------------
@@ -688,7 +743,6 @@ class CI_DB_oci8_driver extends CI_DB {
*
* Generates a platform-specific update string from the supplied data
*
- * @access protected
* @param string the table name
* @param array the update data
* @param array the where clause
@@ -700,20 +754,13 @@ class CI_DB_oci8_driver extends CI_DB {
{
foreach ($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);
}
// --------------------------------------------------------------------
@@ -725,13 +772,12 @@ class CI_DB_oci8_driver extends CI_DB {
* If the database does not support the truncate() command
* This function maps to "DELETE FROM table"
*
- * @access protected
* @param string the table name
* @return string
*/
protected function _truncate($table)
{
- return "TRUNCATE TABLE ".$table;
+ return 'TRUNCATE TABLE '.$table;
}
// --------------------------------------------------------------------
@@ -741,7 +787,6 @@ class CI_DB_oci8_driver extends CI_DB {
*
* Generates a platform-specific delete string from the supplied data
*
- * @access protected
* @param string the table name
* @param array the where clause
* @param string the limit clause
@@ -750,22 +795,18 @@ class CI_DB_oci8_driver extends CI_DB {
protected function _delete($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);
}
// --------------------------------------------------------------------
@@ -775,26 +816,16 @@ class CI_DB_oci8_driver extends CI_DB {
*
* Generates a platform-specific LIMIT clause
*
- * @access protected
- * @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
- * @return string
+ * @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)
{
- $limit = $offset + $limit;
- $newsql = "SELECT * FROM (select inner_query.*, rownum rnum FROM ($sql) inner_query WHERE rownum < $limit)";
-
- if ($offset != 0)
- {
- $newsql .= " WHERE rnum >= $offset";
- }
-
- // remember that we used limits
$this->limit_used = TRUE;
-
- return $newsql;
+ return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($offset + $limit).')'
+ .($offset != 0 ? ' WHERE rnum >= '.$offset : '');
}
// --------------------------------------------------------------------
@@ -802,19 +833,15 @@ class CI_DB_oci8_driver extends CI_DB {
/**
* Close DB Connection
*
- * @access protected
- * @param resource
- * @return void
+ * @param resource
+ * @return void
*/
protected function _close($conn_id)
{
@oci_close($conn_id);
}
-
}
-
-
/* End of file oci8_driver.php */
/* Location: ./system/database/drivers/oci8/oci8_driver.php */