CreateQuery shard_1 shard_01231_distributed_aggregation_memory_efficient (children 4)
 Identifier shard_1
 Identifier shard_01231_distributed_aggregation_memory_efficient
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType UInt64
 Storage definition (children 2)
  Function MergeTree
  Identifier x
