basic-features: collapse charset and collations (#6452)#6456

ti-chi-bot merged 1 commit into

pingcap:release-5.2pingcap/docs:release-5.2from

ti-chi-bot:cherry-pick-6452-to-release-5.2ti-chi-bot/docs:cherry-pick-6452-to-release-5.2Copy head branch name to clipboard