Allow MyXQL to specify :prepare
per operation.
#650
Merged
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This is based on the issue we received in MyXQL about the number of prepared statements growing out of control because of GraphQL type queries.
We already let Postgres specify this option (see here).
I don't remember exactly why we limited to just Postgres. I think it was because we had a strong reason for it (to bypass the generic query plan Postgres creates for prepared statements) and we didn't want to hijack the option names for other adapters. We have a pretty good reason to add it for MyXQL now. WDYT?