Function validateSQLNamePattern

src/bin/psql/describe.c:7368–7409

* validateSQLNamePattern * * Wrapper around string_utils's processSQLNamePattern which also checks the * pattern's validity. In addition to that function's parameters, takes a * 'maxparts' parameter specifying the maximum number of dotted names the * pattern is allowed to have, and a 'added_clause' parameter that returns by * reference whether a clause was added to 'buf'. Returns whether t

 * passed validation, after logging any errors.
 */
static bool
validateSQLNamePattern(PQExpBuffer buf, const char *pattern, bool have_where,
					   bool force_escape, const char *schemavar,
					   const char *namevar, const char *altnamevar,
					   const char *visibilityrule, bool *added_clause,
					   int maxparts)
{
	PQExpBufferData	dbbuf;
	int			dotcnt;
	bool		added;

	initPQExpBuffer(&dbbuf);
	added = processSQLNamePattern(pset.db, buf, pattern, have_where, force_escape,
								  schemavar, namevar, altnamevar,
								  visibilityrule, &dbbuf, &dotcnt);
	if (added_clause != NULL)
		*added_clause = added;

	if (dotcnt >= maxparts)
	{
		pg_log_error("improper qualified name (too many dotted names): %s",
					 pattern);
		termPQExpBuffer(&dbbuf);
		return false;
	}

	if (maxparts > 1 && dotcnt == maxparts-1)
	{
		if (PQdb(pset.db) == NULL)
		{
			pg_log_error("You are currently not connected to a database.");
			return false;
		}
		if (strcmp(PQdb(pset.db), dbbuf.data) != 0)
		{
			pg_log_error("cross-database references are not implemented: %s",
						 pattern);
			return false;
		}
	}
	return true;
}

/*
 * \dRp