Method release

src/jrd/Statement.cpp:647–723

Release a statement.

// Release a statement.
void Statement::release(thread_db* tdbb)
{
	SET_TDBB(tdbb);

	// Release sub statements.
	for (Statement** subStatement = subStatements.begin();
		 subStatement != subStatements.end();
		 ++subStatement)
	{
		(*subStatement)->release(tdbb);
	}

	// Release existence locks on references.

	for (Resource* resource = resources.begin(); resource != resources.end(); ++resource)
	{
		switch (resource->rsc_type)
		{
			case Resource::rsc_relation:
			{
				jrd_rel* relation = resource->rsc_rel;
				MET_release_existence(tdbb, relation);
				break;
			}

			case Resource::rsc_index:
			{
				jrd_rel* relation = resource->rsc_rel;
				IndexLock* index = CMP_get_index_lock(tdbb, relation, resource->rsc_id);
				if (index && index->idl_count)
				{
					--index->idl_count;
					if (!index->idl_count)
						LCK_release(tdbb, index->idl_lock);
				}
				break;
			}

			case Resource::rsc_procedure:
			case Resource::rsc_function:
				resource->rsc_routine->release(tdbb);
				break;

			case Resource::rsc_collation:
			{
				Collation* coll = resource->rsc_coll;
				coll->decUseCount(tdbb);
				break;
			}

			default:
				BUGCHECK(220);	// msg 220 release of unknown resource
				break;
		}
	}

	for (Request** instance = requests.begin(); instance != requests.end(); ++instance)
	{