SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function sum (children 1)
     ExpressionList (children 1)
      Function toUInt64 (children 1)
       ExpressionList (children 1)
        Identifier str
    Function sum (children 1)
     ExpressionList (children 1)
      Function toUInt64 (children 1)
       ExpressionList (children 1)
        Identifier s
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier lc_prewhere
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier val
     Literal UInt64_1