v0.5.21-nightly

What's Changed

Bug Fixes

• [bugfix] check read_only when creating/dropping database (#2867) by @Veeupup
• [metasrv] fix: graceful shutdown blocks for ever. (#2858) by @drmingdrmer

Build/Testing/CI

• ignore codecov for cli (#2859) by @pinylin

Documentation

• [Doc] Add insert into select doc (#2876) by @ygf11
• [Doc] add doc for ceil, ceiling, floor func (#2866) by @junnplus

Features

• [function] Add support for inet_aton (#2862) by @mshauneu
• ISSUE-2456: Support insert select query (#2765) by @ygf11

Improvement

• [Doc] Add insert into select doc (#2876) by @ygf11
• Improve insert into select (#2865) by @bohutang

Others

• [Doc] Add insert into select doc (#2876) by @ygf11
• [bugfix] check read_only when creating/dropping database (#2867) by @Veeupup
• [function] Add support for inet_aton (#2862) by @mshauneu
• Improve insert into select (#2865) by @bohutang
• Improve the error for the drop table in system database (#2861) by @miamia0
• ignore codecov for cli (#2859) by @pinylin