CreateQuery aggregation_ (children 3)
 Identifier aggregation_
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Function toString (children 1)
      ExpressionList (children 1)
       Identifier key
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier null_
 ViewTargets (children 1)
  Storage definition (children 1)
   Function Memory (children 1)
    ExpressionList
