SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier u
    Function countIf (children 1)
     ExpressionList (children 1)
      Function endsWith (children 1)
       ExpressionList (children 2)
        Identifier s
        Literal \'_foo\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_lwu_merges
   Set
