EXISTS / NOT EXISTS clause support for DB_driver
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index 72be14e..ec3de7e 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -1421,7 +1421,7 @@
*/
protected function _has_operator($str)
{
- return (bool) preg_match('/(<|>|!|=|\sIS NULL|\sIS NOT NULL|\sBETWEEN|\sLIKE|\sIN\s*\(|\s)/i', trim($str));
+ return (bool) preg_match('/(<|>|!|=|\sIS NULL|\sIS NOT NULL|EXISTS|\sBETWEEN|\sLIKE|\sIN\s*\(|\s)/i', trim($str));
}
// --------------------------------------------------------------------
@@ -1446,7 +1446,9 @@
'\s*<>?\s*', // <, <>
'\s*>\s*', // >
'\s+IS NULL', // IS NULL
- '\s+IS NOT NULL', // IS NOT NULL
+ '\s+IS NOT NULL', // IS NOT NULL
+ '\s+EXISTS', // EXISTS
+ '\s+NOT EXISTS', // NOT EXISTS
'\s+BETWEEN\s+\S+\s+AND\s+\S+', // BETWEEN value AND value
'\s+IN\s*\([^\)]+\)', // IN(list)
'\s+NOT IN\s*\([^\)]+\)', // NOT IN (list)