HHH-19490 Fix NPE when using array_position on sql array type

[chanzxxx]

NPE occurs when using array_position function.

Query

select testEntity from TestEntity testEntity where ARRAY_POSITION(testEntity.values, ?1) IS NOT NULL

Error

Cannot invoke "org.hibernate.query.sqm.SqmBindableType.getSqmType()" because the return value of "org.hibernate.query.sqm.tree.SqmTypedNode.getExpressible()" is null

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https://hibernate.atlassian.net/browse/HHH-19490

[mbellade]

Thanks @chanzxxx! I left a few minor comments but overall your approach looks good.

[chanzxxx]

Thanks @chanzxxx! I left a few minor comments but overall your approach looks good.

Good points @mbladel ! I just applied your feedbacks to PR.

[mbellade]

I took the liberty of squashing the commits and fixing a small implementation detail for hsqldb that caused the test to fail (it requires a cast for parameters). While I was at it I also moved the test within the ArrayPositionTest class at it and created a similar one for ArrayPositionsTest.

Thanks again for the contribution!

[chanzxxx]

@mbladel It was a pleasure to contribute. 😀 Thanks for quick response!