CreateQuery simple_agf_summing_mt (children 3)
 Identifier simple_agf_summing_mt
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration a (children 1)
    DataType Int64
   ColumnDeclaration grp_aggreg (children 1)
    DataType AggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier groupUniqArrayArray
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType UInt64
   ColumnDeclaration grp_simple (children 1)
    DataType SimpleAggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier groupUniqArrayArray
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType UInt64
 Storage definition (children 2)
  Function SummingMergeTree (children 1)
   ExpressionList
  Identifier a
