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-rw-r--r--system/database/DB_query_builder.php19
1 files changed, 9 insertions, 10 deletions
diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index 416132e16..139f467e6 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -1483,19 +1483,18 @@ abstract class CI_DB_query_builder extends CI_DB_driver {
// --------------------------------------------------------------------
/**
- * From Tables
+ * FROM tables
*
- * This public function implicitly groups FROM tables so there is no confusion
- * about operator precedence in harmony with SQL standards
+ * Groups tables in FROM clauses if needed, so there is no confusion
+ * about operator precedence.
*
- * @param array
- * @return string
+ * Note: This is only used (and overriden) by MySQL and CUBRID.
+ *
+ * @return string
*/
- protected function _from_tables($tables)
+ protected function _from_tables()
{
- is_array($tables) OR $tables = array($tables);
-
- return (count($tables) === 1) ? $tables[0] : '('.implode(', ', $tables).')';
+ return implode(', ', $this->qb_from);
}
// --------------------------------------------------------------------
@@ -2010,7 +2009,7 @@ abstract class CI_DB_query_builder extends CI_DB_driver {
// Write the "FROM" portion of the query
if (count($this->qb_from) > 0)
{
- $sql .= "\nFROM ".$this->_from_tables($this->qb_from);
+ $sql .= "\nFROM ".$this->_from_tables();
}
// Write the "JOIN" portion of the query