Function ATSimplePermissions

src/backend/commands/tablecmds.c:7790–7858

* ATSimplePermissions * * - Ensure that it is a relation (or possibly a view) * - Ensure this user is the owner * - Ensure that it is not a system table */

 * - Ensure that it is not a system table
 */
static void
ATSimplePermissions(Relation rel, int allowed_targets)
{
	int			actual_target;

	switch (rel->rd_rel->relkind)
	{
		case RELKIND_RELATION:
		case RELKIND_PARTITIONED_TABLE:
			actual_target = ATT_TABLE;
			break;
		case RELKIND_VIEW:
			actual_target = ATT_VIEW;
			break;
		case RELKIND_MATVIEW:
			actual_target = ATT_MATVIEW;
			break;
		case RELKIND_INDEX:
			actual_target = ATT_INDEX;
			break;
		case RELKIND_PARTITIONED_INDEX:
			actual_target = ATT_PARTITIONED_INDEX;
			break;
		case RELKIND_COMPOSITE_TYPE:
			actual_target = ATT_COMPOSITE_TYPE;
			break;
		case RELKIND_FOREIGN_TABLE:
			actual_target = ATT_FOREIGN_TABLE;
			break;
		case RELKIND_DIRECTORY_TABLE:
			actual_target = ATT_DIRECTORY_TABLE;
			break;
		case RELKIND_SEQUENCE:
			actual_target = ATT_SEQUENCE;
			break;

		case RELKIND_AOSEGMENTS:
		case RELKIND_AOBLOCKDIR:
		case RELKIND_AOVISIMAP:
			/*
			 * Allow ALTER TABLE operations in standard alone mode on
			 * AO segment tables.
			 */
			if (IsUnderPostmaster)
				actual_target = ATT_TABLE;
			else
				actual_target = 0;
			break;

		default:
			actual_target = 0;
			break;
	}

	/* Wrong target type? */
	if ((actual_target & allowed_targets) == 0)
		ATWrongRelkindError(rel, allowed_targets);