SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 5)
    Function map (alias m) (children 1)
     ExpressionList (children 4)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'1\'
        Literal \'LowCardinality(UInt8)\'
      Literal UInt64_4
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'2\'
        Literal \'LowCardinality(UInt8)\'
      Literal UInt64_5
    Function mapContains (children 1)
     ExpressionList (children 2)
      Identifier m
      Literal UInt64_1
    Function mapContains (children 1)
     ExpressionList (children 2)
      Identifier m
      Literal UInt64_3
    Function mapContains (children 1)
     ExpressionList (children 2)
      Identifier m
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'1\'
        Literal \'LowCardinality(UInt8)\'
    Function mapContains (children 1)
     ExpressionList (children 2)
      Identifier m
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'3\'
        Literal \'LowCardinality(UInt8)\'