Function executor_errposition

src/backend/executor/execUtils.c:955–970

* executor_errposition * Report an execution-time cursor position, if possible. * * This is expected to be used within an ereport() call. The return value * is a dummy (always 0, in fact). * * The locations stored in parsetrees are byte offsets into the source string. * We have to convert them to 1-based character indexes for reporting to * clients. (We do things this way to avoid unnec

 * expensive than storing token offsets.)
 */
int
executor_errposition(EState *estate, int location)
{
	int			pos;

	/* No-op if location was not provided */
	if (location < 0)
		return 0;
	/* Can't do anything if source text is not available */
	if (estate == NULL || estate->es_sourceText == NULL)
		return 0;
	/* Convert offset to character number */
	pos = pg_mbstrlen_with_len(estate->es_sourceText, location) + 1;
	/* And pass it to the ereport mechanism */
	return errposition(pos);
}

/*
 * Register a shutdown callback in an ExprContext.