SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function hex (children 1)
     ExpressionList (children 1)
      Function sipHash128Keyed (children 1)
       ExpressionList (children 3)
        Function tuple (children 1)
         ExpressionList (children 2)
          Function toUInt64 (children 1)
           ExpressionList (children 1)
            Literal UInt64_0
          Function toUInt64 (children 1)
           ExpressionList (children 1)
            Literal UInt64_0
        Identifier a
        Identifier b
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier sipHashKeyed_test