CreateQuery insert_dedup_token (children 3)
 Identifier insert_dedup_token
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType Int32
   ColumnDeclaration val (children 1)
    DataType UInt32
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier id
  Set