SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 5)
    Function if (alias d) (children 1)
     ExpressionList (children 3)
      Literal UInt64_1 (alias a)
      Literal UInt64_2 (alias b)
      Literal UInt64_3 (alias c)
    Identifier a
    Identifier b
    Identifier c
    Identifier d
 Identifier TSKV
