SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Identifier meta_source_req_uuid
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier bug_14144
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier meta_source_type
     Literal \'missing\'
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier meta_source_req_uuid