Quanlong Huang created IMPALA-13342:
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Summary: Query option to dump TExecRequest
Key: IMPALA-13342
URL: https://issues.apache.org/jira/browse/IMPALA-13342
Project: IMPALA
Issue Type: New Feature
Components: Backend, Frontend
Reporter: Quanlong Huang
To investigate planner bugs like IMPALA-13274, it'd be helpful to check the
TExecRequest of the query. However, enabling TRACE level logs of Frontend
doesn't dump it. There is a flag, dump_exec_request_path, which will let
coordinator dump the TExecRequest to files under the given folder. That's a
startup flag that requires a restart and will dump TExecRequests for all
queries.
A query option that lets coordinator output the TExecRequest to the client
without executing the query will be helpful. Note that the query might cause
crash so we don't want it to be executed. Explaining the query will get a
different TExecRequest.
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