[CALCITE-2929] Simplification of IS NULL checks are incorrectly assuming that CAST-s are possible - ASF JIRA

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Example:

with ax(s) as (values ('xxx'),(cast(null as character varying)))
select cast(s as int) IS NULL from ax;

returns a result set; which evaluates
however 'xxx' is not a valid integer; so an error should be recieved instead

Another class of almost the same issue:

select cast('xxx' as int) IS NULL;

is also problematic; in that case the not nullability is deduced from the fact that the literal's type is not nullable

blocks

CALCITE-2911 Release Calcite 1.19.0

causes

DRILL-7195 Query returns incorrect result or does not fail when cast with is null is used in filter condition

relates to

CALCITE-2469 RexSimplify should optimize '(NOT x) IS NULL' to 'x IS NULL'

links to

GitHub Pull Request #1116

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