feat: add StatementStatistics for slow query logging implementation

[zyy17]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

Resolve #4450

The PR introduces the new struct StatementStatistics for implementing statistics of query statements. For now, it's used for slow query logging.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

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[codecov]

Codecov Report

Attention: Patch coverage is 26.43678% with 64 lines in your changes missing coverage. Please review.

Project coverage is 84.18%. Comparing base (50cb595) to head (f858d75).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4719      +/-   ##
==========================================
- Coverage   84.46%   84.18%   -0.28%     
==========================================
  Files        1118     1120       +2     
  Lines      203127   203454     +327     
==========================================
- Hits       171577   171285     -292     
- Misses      31550    32169     +619     

[sunng87]

Is there any chance we can put this at instance level, say SqlQueryHandler and PrometheusHandler? so we don't need to configure it for each protocol.

[zyy17]

Is there any chance we can put this at instance level, say SqlQueryHandler and PrometheusHandler? so we don't need to configure it for each protocol.

Good idea. Let me try to do that.

[killme2008]

Good job! Another suggestion is that maybe we can record all the slow queries into a table like information_schema.slow_queries like that. Which is a append-only tables with TTL setting.

[zyy17]

Good job! Another suggestion is that maybe we can record all the slow queries into a table like information_schema.slow_queries like that. Which is a append-only tables with TTL setting.

Good job! Another suggestion is that maybe we can record all the slow queries into a table like information_schema.slow_queries like that. Which is a append-only tables with TTL setting.

I can take it as the next PR. Let me learn how to implement it.

[killme2008]

LGTM

[v0y4g3r]

Is it possible that we may print sensitive data into slow log file? Like copy from/to statements usually take a long time, while bearing AK/SK info.

[fengjiachun]

LGTM

[zyy17]

Is it possible that we may print sensitive data into slow log file? Like copy from/to statements usually take a long time, while bearing AK/SK info.

You're right. Let me check it.

[zyy17]

Is it possible that we may print sensitive data into slow log file? Like copy from/to statements usually take a long time, while bearing AK/SK info.

We already use https://github.com/GreptimeTeam/greptimedb/blob/main/src/sql/src/statements/option_map.rs#L27 for sensitive data. If we use Display, it will print **** for sensitive data.