674 extract parameters

[ymajoros]

No description provided.

[vladmihalcea]

Thanks, I'll review it when I have some time.

[KENNYSOFT]

First of all, thanks, you saved my life!

I've added just one simple but important suggestion from my experience with these wonderful changes.
Also, you should copy these methods to hibernate-60 and hibernate-63 modules too.

I'm looking forward to this PR being merged, and released soon!

[KENNYSOFT]

Suggested change

	Object value = queryParameterBinding.getBindValue();
	parameterValues.add(value);
	if (queryParameterBinding.isMultiValued()) {
	parameterValues.addAll(queryParameterBinding.getBindValues());
	} else {
	parameterValues.add(queryParameterBinding.getBindValue());
	}

If you call getBindValue to multi-valued binding, IllegalStateException("Binding is multi-valued; illegal call to #getBindValue") occurs.

Specifically, the extracted SQL of Hibernate 6.0+ using this class contains 'expanded' JdbcParameters. For example, given HQL below:

select team
from Team team
where team.isDeleted = ?1 and team.no in ?2

turns into (abbreviated) SQL as:

select t1_0.no from team t1_0 where t1_0.is_deleted=? and t1_0.no in (?,?,?,?)

when IN clause parameter has 4 items.

[KENNYSOFT]

Nah, if the IN clause parameter has 3 items (e.g., [1, 2, 3]) and it's padded to 4 items (e.g., (?,?,?,?); by configuring something like hibernate.query.in_clause_parameter_padding), bindValues still have 3 items so the size does not match.

I've found the key from the original code! Here is the working code fragment:

JdbcParameterBindings parameterBindings = ReflectionUtils.invokeMethod(
        plan,
        ReflectionUtils.getMethod(
                plan,
                "createJdbcParameterBindings",
                ReflectionUtils.getClass("org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan$CacheableSqmInterpretation"),
                DomainQueryExecutionContext.class
        ),
        cacheableSqmInterpretation,
        querySqm
);
return jdbcSelect.getParameterBinders().stream().map(b -> {
    JdbcParameterBinding parameterBinding = parameterBindings.getBinding((JdbcParameter) b);
    if (parameterBinding != null){
        return parameterBinding.getBindValue();
    }
    return null;
}).toList();

Kotlin version

val parameterBindings = ReflectionUtils.invokeMethod<JdbcParameterBindings>(
    plan,
    ReflectionUtils.getMethod(
        plan,
        "createJdbcParameterBindings",
        ReflectionUtils.getClass<Any>("org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan\$CacheableSqmInterpretation"),
        DomainQueryExecutionContext::class.java,
    ),
    cacheableSqmInterpretation,
    querySqm,
)
return jdbcSelect.parameterBinders.map { parameterBindings.getBinding(it as JdbcParameter)?.bindValue }

Copy the getSQLFromSqmQuery method and replace the code in if (jdbcSelect != null) block to the fragment.