Plan recreator development task

[rebelice]

Plan Recreator

Provide all the information required to reproduce the implementation plan for import/export. Provide a simple, one-stop collection and retention of the event of the scene, simplifying the inspection information extraction steps of the optimizer-related issues.

Description

PLAN RECREATOR provides two features:

• One-click Export/Import Information Reproducing Single SQL
• One-click Export/Importing Information Reproducing Slow Queries Dump for one SQL

  tidb> plan recreator dump explain [analyze] sqlStmt

• sqlStmt parameter is the specified SQL statement
• explain [Analyze] is used to specify back explain or Explain Analyze information
• This statement will return a single-active URL for download files such as http://${tidb-server-ip}:${tidb-server-status-port}/plan-recreator/dump/xxxx

Dump for slow queries

tidb> plan recretor dump explain [analyze] slow query [filtering]

• explain [Analyze] is used to specify back explain or Explain Analyze information
• [filtering] is used to filter slow inquiry in Slow Query Table, support:
  • WHERE
  • ORDER BY
  • Limit
• This statement will return a single-active URL for download files such as http://${tidb-server-ip}:${tidb-server-status-port}/plan-recreator/dump/xxxx

Load Information

tidb> plan recreator load 'file_name'

File Format The file plan-recreator.zip format is as follows:

|-meta.txt
|-schema.sql
|-stats
|   |-stats1.json
|   |-stats2.json
|   |-....
|-config.toml
|-variables.toml
|-bindings.sql
|-sqls.sql
|_explain
    |-explain1.txt
    |-explain2.txt

Development task

• [ ] Modify parser to add PLAN RECREATOR statement
• [ ] Modify tidb/executor to implement plan recreator
• [ ] Add a HTTP handler to download files
• [ ] Tests

[rebelice]

I move it to tidb/issues/26325