sql: Hibernate's use of int/float operations

[vivekmenezes]

@justinj to fill out what this is about.

[justinj]

Basically there are some operations that Hibernate does that relies on Postgres' implicit conversions (for say, 1::INT + 1::FLOAT). I don't remember offhand what the context for those are, but it's exercised by testQuotientConversion in the Hibernate test suite.

I didn't dig deep enough into this issue in particular to figure out if this could be resolved just by our adding an overload for + for int + float and float + int and other similar situations, though.

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