1 files changed, 32 insertions, 0 deletions
diff --git a/includes/database/select.inc b/includes/database/select.inc
index bef03f756..633965dcc 100644
--- a/includes/database/select.inc
+++ b/includes/database/select.inc
@@ -579,6 +579,16 @@ class SelectQueryExtender implements SelectQueryInterface {
     return $count;
   }
 
+  function isNull($field) {
+    $this->query->isNull($field);
+    return $this;
+  }
+
+  function isNotNull($field) {
+    $this->query->isNotNull($field);
+    return $this;
+  }
+
   public function __toString() {
     return (string)$this->query;
   }
@@ -760,6 +770,17 @@ class SelectQuery extends Query implements SelectQueryInterface {
     return $this;
   }
 
+  public function isNull($field) {
+    $this->where->isNull($field);
+    return $this;
+  }
+
+  public function isNotNull($field) {
+    $this->where->isNotNull($field);
+    return $this;
+  }
+
+
   public function compile(DatabaseConnection $connection) {
     return $this->where->compile($connection);
   }
@@ -801,6 +822,17 @@ class SelectQuery extends Query implements SelectQueryInterface {
     return new $extender_name($this, $this->connection);
   }
 
+  public function havingIsNull($field) {
+    $this->having->isNull($field);
+    return $this;
+  }
+
+  public function havingIsNotNull($field) {
+    $this->having->isNotNull($field);
+    return $this;
+  }
+
+
   /* Alter accessors to expose the query data to alter hooks. */
 
   public function &getFields() {