Function FigureIndexColname

src/backend/parser/parse_target.c:1715–1722

* FigureIndexColname - * choose the name for an expression column in an index * * This is actually just like FigureColname, except we return NULL if * we can't pick a good name. */

 * we can't pick a good name.
 */
char *
FigureIndexColname(Node *node)
{
	char	   *name = NULL;

	(void) FigureColnameInternal(node, &name);
	return name;
}

/*
 * FigureColnameInternal -