SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function count (children 1)
       ExpressionList
      Literal UInt64_0
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier dtest
   Function in (children 1)
    ExpressionList (children 2)
     Identifier b
     Function toDecimal256 (children 1)
      ExpressionList (children 2)
       Literal \'44.4000\'
       Literal UInt64_0
