Function NameListToString

src/backend/catalog/namespace.c:3212–3237

* NameListToString * Utility routine to convert a qualified-name list into a string. * * This is used primarily to form error messages, and so we do not quote * the list elements, for the sake of legibility. * * In most scenarios the list elements should always be Value strings, * but we also allow A_Star for the convenience of ColumnRef processing. */

 * but we also allow A_Star for the convenience of ColumnRef processing.
 */
char *
NameListToString(List *names)
{
	StringInfoData string;
	ListCell   *l;

	initStringInfo(&string);

	foreach(l, names)
	{
		Node	   *name = (Node *) lfirst(l);

		if (l != list_head(names))
			appendStringInfoChar(&string, '.');

		if (IsA(name, String))
			appendStringInfoString(&string, strVal(name));
		else if (IsA(name, A_Star))
			appendStringInfoChar(&string, '*');
		else
			elog(ERROR, "unexpected node type in name list: %d",
				 (int) nodeTag(name));
	}

	return string.data;
}

/*
 * NameListToQuotedString