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When "utf8mb4" is available, use it as the default client charset when invoking standalone "mysql" commands
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Authored by epriestley on Aug 27 2019, 10:33 PM.

Details

Summary

Fixes T13390. We have some old code which doesn't dynamically select between "utf8mb4" and "utf8". This can lead to dumping utf8mb4 data over a utf8 connection in bin/storage dump, which possibly corrupts some emoji/whales.

Instead, prefer "utf8mb4" if it's available.

Test Plan

Ran bin/storage dump and bin/storage shell, saw sub-commands select utf8mb4 as the client charset.

Diff Detail

Repository
rP Phabricator
Branch
utf8
Lint
Lint OK
Unit
Unit Tests OK
Build Status
Buildable 23313
Build 32032: Run Core Tests
Build 32031: arc lint + arc unit