[CALCITE-7407] Illegal use of dynamic parameter with ||

[macroguo-ghy]

Jira Link

CALCITE-7407

Changes Proposed

• Change || to use InferTypes.RETURN_TYPE so dynamic parameters are typed from the string concatenation context instead of being rejected as illegal ANY operands.
• Add validator regression coverage for concatenation with dynamic parameters, NULL, and CAST(NULL AS ANY).
• Add a JDBC prepared statement regression covering ? || 'odore'.

Reproduction

select * from emp where ename = (? || 'KI')

Before this change, Calcite rejected the dynamic parameter in the concatenation expression with Illegal use of dynamic parameter.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

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