SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Identifier col1
    Function multiIf (alias t) (children 1)
     ExpressionList (children 3)
      Function in (children 1)
       ExpressionList (children 2)
        Identifier col1
        Literal Tuple_(\'a\', \'b\')
      Literal NULL
      Literal UInt64_0
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier t
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test1_00395