When a query is executed using the HTTP end-point the response has a number of headers applied that can be used later.
HTTP/2 200 date: Tue, 29 Jun 2021 09:32:06 GMT content-type: application/json; charset=UTF-8 x-clickhouse-query-id: c4f6aba2-480f-4f67-9d5d-5662e44b45dc x-clickhouse-format: JSON x-clickhouse-timezone: UTC x-hdx-query-stats: exec_time=4271 rows_read=0 bytes_read=0 num_partitions=4 num_peers=2 traceparent: 00-9e94d8306114a074da5393950ff481ac-cace2fb519dc02bb-01
Unique query identifier, supplied each time a query is executed.
The format of the response Body.
The time zone applied to the data.
Statistics and information covering how the query was executed and by how many resources
The traceId that can be used to look up the query trace within Tempo
The Query stats supply the following information.
Execution time of the query in milliseconds
Number of rows read to supply to answer the query
Number of uncompressed bytes parsed to answer the query
Number of HDX partitions accessed to answer the query
Number of query-peers accessed to answer the query
Updated 9 months ago