1 files changed, 121 insertions, 8 deletions
diff --git a/system/database/drivers/postgre/postgre_driver.php b/system/database/drivers/postgre/postgre_driver.php
index 88f08b2d7..63a72f5d3 100644
--- a/system/database/drivers/postgre/postgre_driver.php
+++ b/system/database/drivers/postgre/postgre_driver.php
@@ -35,7 +35,7 @@ class CI_DB_postgre_driver extends CI_DB {
 	 * 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 numrows ";
+	var $_count_string = "SELECT COUNT(*) AS ";
 	var $_random_keyword = ' RANDOM()'; // database specific random keyword
 
 	/**
@@ -83,6 +83,22 @@ class CI_DB_postgre_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
+	 * Set client character set
+	 *
+	 * @access	public
+	 * @param	string
+	 * @param	string
+	 * @return	resource
+	 */
+	function db_set_charset($charset, $collation)
+	{
+		// TODO - add support if needed
+		return TRUE;
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
 	 * Version number query string
 	 *
 	 * @access	public
@@ -305,11 +321,19 @@ class CI_DB_postgre_driver extends CI_DB {
 	 * Generates a platform-specific query string so that the table names can be fetched
 	 *
 	 * @access	private
+	 * @param	boolean
 	 * @return	string
 	 */
-	function _list_tables()
+	function _list_tables($prefix_limit = FALSE)
 	{	
-		return "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'";	
+		$sql = "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'";	
+		
+		if ($prefix_limit !== FALSE AND $this->dbprefix != '')
+		{
+			$sql .= " AND table_name LIKE '".$this->dbprefix."%'";
+		}
+		
+		return $sql;
 	}
 	
 	// --------------------------------------------------------------------
@@ -395,6 +419,58 @@ class CI_DB_postgre_driver extends CI_DB {
 	// --------------------------------------------------------------------
 
 	/**
+	 * Protect Identifiers
+	 *
+	 * This function adds backticks if appropriate based on db type
+	 *
+	 * @access	private
+	 * @param	mixed	the item to escape
+	 * @param	boolean	only affect the first word
+	 * @return	mixed	the item with backticks
+	 */
+	function _protect_identifiers($item, $first_word_only = FALSE)
+	{
+		if (is_array($item))
+		{
+			$escaped_array = array();
+
+			foreach($item as $k=>$v)
+			{
+				$escaped_array[$this->_protect_identifiers($k)] = $this->_protect_identifiers($v, $first_word_only);
+			}
+
+			return $escaped_array;
+		}	
+
+		// This function may get "item1 item2" as a string, and so
+		// we may need ""item1" "item2"" and not ""item1 item2""
+		if (strpos($item, ' ') !== FALSE)
+		{
+			// This function may get "field >= 1", and need it to return ""field" >= 1"
+			if ($first_word_only === TRUE)
+			{
+				return '"'.preg_replace('/ /', '" ', $item, 1);
+			}
+
+			$item = preg_replace('/(^|\s|\()([\w\d\-\_]+?)(\s|\)|$)/iS', '$1"$2"$3', $item);
+		}
+
+		$exceptions = array('AS', '/', '-', '%', '+', '*');
+		
+		foreach ($exceptions as $exception)
+		{
+			if (stristr($item, " "{$exception}" ") !== FALSE)
+			{
+				$item = preg_replace('/ "('.preg_quote($exception).')" /i', ' $1 ', $item);
+			}
+		}
+		
+		return $item;
+	}
+			
+	// --------------------------------------------------------------------
+
+	/**
 	 * Insert statement
 	 *
 	 * Generates a platform-specific insert string from the supplied data
@@ -421,9 +497,11 @@ class CI_DB_postgre_driver extends CI_DB {
 	 * @param	string	the table name
 	 * @param	array	the update data
 	 * @param	array	the where clause
+	 * @param	array	the orderby clause
+	 * @param	array	the limit clause
 	 * @return	string
 	 */
-	function _update($table, $values, $where, $limit = FALSE)
+	function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
 	{
 		foreach($values as $key => $val)
 		{
@@ -431,8 +509,29 @@ class CI_DB_postgre_driver extends CI_DB {
 		}
 		
 		$limit = (!$limit) ? '' : ' LIMIT '.$limit;
+		
+		$orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
 	
-		return "UPDATE ".$this->_escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where).$limit;
+		return "UPDATE ".$this->_escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where).$orderby.$limit;
+	}
+
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Truncate statement
+	 *
+	 * Generates a platform-specific truncate string from the supplied data
+	 * If the database does not support the truncate() command
+	 * This function maps to "DELETE FROM table"
+	 *
+	 * @access	public
+	 * @param	string	the table name
+	 * @return	string
+	 */	
+	function _truncate($table)
+	{
+		return "TRUNCATE ".$this->_escape_table($table);
 	}
 	
 	// --------------------------------------------------------------------
@@ -445,17 +544,31 @@ class CI_DB_postgre_driver extends CI_DB {
 	 * @access	public
 	 * @param	string	the table name
 	 * @param	array	the where clause
+	 * @param	string	the limit clause
 	 * @return	string
 	 */	
-	function _delete($table, $where, $limit = FALSE)
+	function _delete($table, $where = array(), $like = array(), $limit = FALSE)
 	{
+		$conditions = '';
+
+		if (count($where) > 0 || 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 ".$this->_escape_table($table)." WHERE ".implode(" ", $where).$limit;
+		return "DELETE FROM ".$table.$conditions.$limit;
 	}
 
 	// --------------------------------------------------------------------
-
 	/**
 	 * Limit string
 	 *