pingcap / pingcap/tidb

Clean up old version comments like /*!40100 DEFAULT CHARACTER SET utf8mb4 */

Open
#36,270 1 comment 3 reactions 0 assignees View on GitHub
type/enhancement
Dominant language
Go
Stars
40.5k
Forks
6.2k
PR merge metrics
PR metrics pending

Description

## Enhancement
TiDB is aiming for compatibility with MySQL 5.7/8.0, so outputting version comments < 5.7 seems unnecessary.

Notice that there might be use of version comments in the repository aiming for migrating data to TiDB, where use of older version comments may make sense.

I propose that all the version comments mentioning versions <= 5.6 are removed and just output as normal non-commented text/options, i.e. instead of `/*!40100 DEFAULT CHARACTER SET utf8mb4 */` it would just be `DEFAULT CHARACTER SET utf8mb4`

Contributor guide

Open the contributing guide

Research direction

No source file or test is named. Search the Go SQL output paths for version comments such as /*!40100 DEFAULT CHARACTER SET utf8mb4 */; verify that comments for versions <=5.6 become ordinary options while migration-oriented comments remain supported, then add focused tests for both cases.

Written by the indexing model from the issue text.

Assessment

Tech stack
go, mysql, sql
Domain
databases
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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