CreateQuery data_02294 (children 3)
 Identifier data_02294
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration a (children 1)
    DataType Int64
   ColumnDeclaration b (children 1)
    DataType Int64
   ColumnDeclaration grp_aggreg (children 1)
    DataType AggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier groupArrayArray
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType UInt64
   ColumnDeclaration grp_simple (children 1)
    DataType SimpleAggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier groupArrayArray
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType UInt64
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier a
