Function FreeExprEvalState

pg_documentdb/src/query/bson_expr_eval.c:360–390

Frees the resources of a ExprEvalState heap object. * This should only be used on an ExprEvalState created on the same memory context using the * GetExpressionEvalState* functions. */

 * This should only be used on an ExprEvalState created on the same memory context using the
 * GetExpressionEvalState* functions. */
void
FreeExprEvalState(ExprEvalState *exprEvalState, MemoryContext memoryContext)
{
	if (exprEvalState != NULL)
	{
		MemoryContext originalMemoryContext = MemoryContextSwitchTo(memoryContext);

		if (exprEvalState->estate != NULL)
		{
			/* this will destroy the executor state memory context which holds exprState and exprContext. */
			FreeExecutorState(exprEvalState->estate);
			exprEvalState->estate = NULL;
		}

		if (exprEvalState->datums != NULL)
		{
			pfree(exprEvalState->datums);
			exprEvalState->datums = NULL;
		}

		if (exprEvalState->tupleSlot != NULL)
		{
			ExecDropSingleTupleTableSlot(exprEvalState->tupleSlot);
			exprEvalState->tupleSlot = NULL;
		}

		pfree(exprEvalState);

		MemoryContextSwitchTo(originalMemoryContext);
	}
}


/* --------------------------------------------------------- */