Function explain_ExecutorEnd

contrib/auto_explain/auto_explain.c:386–466

* ExecutorEnd hook: log results if needed */

 * ExecutorEnd hook: log results if needed
 */
static void
explain_ExecutorEnd(QueryDesc *queryDesc)
{
	if (queryDesc->totaltime && auto_explain_enabled())
	{
		MemoryContext oldcxt;
		double		msec;

		/* Wait for completion of all qExec processes. */
		if (queryDesc->estate->dispatcherState && queryDesc->estate->dispatcherState->primaryResults)
			cdbdisp_checkDispatchResult(queryDesc->estate->dispatcherState, DISPATCH_WAIT_NONE);

		/*
		 * Make sure we operate in the per-query context, so any cruft will be
		 * discarded later during ExecutorEnd.
		 */
		oldcxt = MemoryContextSwitchTo(queryDesc->estate->es_query_cxt);

		/*
		 * Make sure stats accumulation is done.  (Note: it's okay if several
		 * levels of hook all do this.)
		 */
		InstrEndLoop(queryDesc->totaltime);

		/* Log plan if duration is exceeded. */
		msec = queryDesc->totaltime->total * 1000.0;
		if (msec >= auto_explain_log_min_duration)
		{
			ExplainState *es = NewExplainState();

			es->analyze = (queryDesc->instrument_options && auto_explain_log_analyze);
			es->verbose = auto_explain_log_verbose;
			es->buffers = (es->analyze && auto_explain_log_buffers);
			es->wal = (es->analyze && auto_explain_log_wal);
			es->timing = (es->analyze && auto_explain_log_timing);
			es->summary = es->analyze;
			es->format = auto_explain_log_format;
			es->settings = auto_explain_log_settings;

			ExplainBeginOutput(es);
			ExplainQueryText(es, queryDesc);
			ExplainPrintPlan(es, queryDesc);
			if (es->analyze && auto_explain_log_triggers)
				ExplainPrintTriggers(es, queryDesc);
			if (es->costs)
				ExplainPrintJITSummary(es, queryDesc);
			if (es->analyze)
				ExplainPrintExecStatsEnd(es, queryDesc);
			ExplainEndOutput(es);

			/* Remove last line break */
			if (es->str->len > 0 && es->str->data[es->str->len - 1] == '\n')
				es->str->data[--es->str->len] = '\0';

			/* Fix JSON to output an object */
			if (auto_explain_log_format == EXPLAIN_FORMAT_JSON)
			{
				es->str->data[0] = '{';