Function resolveTargetListUnknowns

src/backend/parser/parse_target.c:289–308

* resolveTargetListUnknowns() * Convert any unknown-type targetlist entries to type TEXT. * * We do this after we've exhausted all other ways of identifying the output * column types of a query. */

 * column types of a query.
 */
void
resolveTargetListUnknowns(ParseState *pstate, List *targetlist)
{
	ListCell   *l;

	foreach(l, targetlist)
	{
		TargetEntry *tle = (TargetEntry *) lfirst(l);
		Oid			restype = exprType((Node *) tle->expr);

		if (restype == UNKNOWNOID)
		{
			tle->expr = (Expr *) coerce_type(pstate, (Node *) tle->expr,
											 restype, TEXTOID, -1,
											 COERCION_IMPLICIT,
											 COERCE_IMPLICIT_CAST,
											 -1);
		}
	}
}


/*