Function FreeExecutorState

src/backend/executor/execUtils.c:240–281

---------------- * FreeExecutorState * * Release an EState along with all remaining working storage. * * Note: this is not responsible for releasing non-memory resources, such as * open relations or buffer pins. But it will shut down any still-active * ExprContexts within the EState and deallocate associated JITed expressions. * That is sufficient cleanup for situations where the EState

 * ----------------
 */
void
FreeExecutorState(EState *estate)
{
	/*
	 * Shut down and free any remaining ExprContexts.  We do this explicitly
	 * to ensure that any remaining shutdown callbacks get called (since they
	 * might need to release resources that aren't simply memory within the
	 * per-query memory context).
	 */
	while (estate->es_exprcontexts)
	{
		/*
		 * XXX: seems there ought to be a faster way to implement this than
		 * repeated list_delete(), no?
		 */
		FreeExprContext((ExprContext *) linitial(estate->es_exprcontexts),
						true);
		/* FreeExprContext removed the list link for us */
	}

	estate->dispatcherState = NULL;

	/* release JIT context, if allocated */
	if (estate->es_jit)
	{
		jit_release_context(estate->es_jit);
		estate->es_jit = NULL;
	}

	/* release partition directory, if allocated */
	if (estate->es_partition_directory)
	{
		DestroyPartitionDirectory(estate->es_partition_directory);
		estate->es_partition_directory = NULL;
	}

	/*
	 * Free the per-query memory context, thereby releasing all working
	 * memory, including the EState node itself.
	 */
	MemoryContextDelete(estate->es_query_cxt);
}

/*
 * Internal implementation for CreateExprContext() and CreateWorkExprContext()