Remove "CHARSET" config option for MySQL, always use "utf8mb4" (#25413)

In modern days, there is no reason to make users set "charset" anymore.

Close #25378

## ⚠️ BREAKING

The key `[database].CHARSET` was removed completely as every newer
(>10years) MySQL database supports `utf8mb4` already.
There is a (deliberately) undocumented new fallback option if anyone
still needs to use it, but we don't recommend using it as it simply
causes problems.
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wxiaoguang 2023-06-21 18:49:25 +08:00 committed by GitHub
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8 changed files with 9 additions and 46 deletions

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@ -443,7 +443,6 @@ The following configuration set `Content-Type: application/vnd.android.package-a
- `SQLITE_TIMEOUT`: **500**: Query timeout for SQLite3 only.
- `SQLITE_JOURNAL_MODE`: **""**: Change journal mode for SQlite3. Can be used to enable [WAL mode](https://www.sqlite.org/wal.html) when high load causes write congestion. See [SQlite3 docs](https://www.sqlite.org/pragma.html#pragma_journal_mode) for possible values. Defaults to the default for the database file, often DELETE.
- `ITERATE_BUFFER_SIZE`: **50**: Internal buffer size for iterating.
- `CHARSET`: **utf8mb4**: For MySQL only, either "utf8" or "utf8mb4". NOTICE: for "utf8mb4" you must use MySQL InnoDB > 5.6. Gitea is unable to check this.
- `PATH`: **data/gitea.db**: For SQLite3 only, the database file path.
- `LOG_SQL`: **true**: Log the executed SQL.
- `DB_RETRIES`: **10**: How many ORM init / DB connect attempts allowed.