[CALCITE-7842] Multiset operators return incorrect results for ROW elements

[tkalkirill]

Jira Link

CALCITE-7842

Changes Proposed

Fix deep equality for ROW elements in multiset predicates and operations.

For example, this query now returns true, false instead of false, false:

SELECT ROW(1, 'Foo') MEMBER OF MULTISET[ROW(x, y)]
FROM (VALUES (1, 'Foo'), (2, 'Bar')) AS t(x, y);

[tkalkirill]

I compared the function behavior just as in Oracle:
https://onecompiler.com/oracle/455nfv3x8

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud