Fix cases where CTE's are not supported #45586
Merged
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CTE's are not supported for MySQL versions below 8.0, so these tests
were failing locally for me on MySQL 5.7. While 5.7 is quite old, it's
still supported and used by many major Rails applications and we need a
check for support.
In addition to this PR I'll need to get a buildkite build running for
5.7. This wasn't caught earlier because our buildkite upgraded to 8.0.