CreateQuery tab (children 3)
 Identifier tab
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType Int64
   ColumnDeclaration dflt (children 2)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType Int64
    Literal UInt64_54321
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set
