Function roles_info

pg_documentdb/src/commands/roles.c:821–901

* roles_info implements the core logic for rolesInfo command */

 * roles_info implements the core logic for rolesInfo command
 */
Datum
roles_info(pgbson *rolesInfoBson)
{
	if (!EnableRoleCrud)
	{
		ereport(ERROR, (errcode(ERRCODE_DOCUMENTDB_COMMANDNOTSUPPORTED),
						errmsg("RolesInfo command is not supported."),
						errdetail_log("RolesInfo command is not supported.")));
	}

	if (!IsMetadataCoordinator())
	{
		StringInfo rolesInfoQuery = makeStringInfo();
		appendStringInfo(rolesInfoQuery,
						 "SELECT %s.roles_info(%s::%s.bson)",
						 ApiSchemaNameV2,
						 quote_literal_cstr(PgbsonToHexadecimalString(rolesInfoBson)),
						 CoreSchemaNameV2);
		DistributedRunCommandResult result = RunCommandOnMetadataCoordinator(
			rolesInfoQuery->data);

		if (!result.success)
		{
			ereport(ERROR, (errcode(ERRCODE_DOCUMENTDB_INTERNALERROR),
							errmsg(
								"Roles info operation failed: %s",
								text_to_cstring(result.response)),
							errdetail_log(
								"Roles info operation failed: %s",
								text_to_cstring(result.response))));
		}

		pgbson_writer finalWriter;
		PgbsonWriterInit(&finalWriter);
		PgbsonWriterAppendInt32(&finalWriter, "ok", 2, 1);
		return PointerGetDatum(PgbsonWriterGetPgbson(&finalWriter));
	}

	RolesInfoSpec rolesInfoSpec = {
		.roleNames = NIL,
		.showAllRoles = false,
		.showBuiltInRoles = false,
		.showPrivileges = false
	};
	ParseRolesInfoSpec(rolesInfoBson, &rolesInfoSpec);

	pgbson_writer finalWriter;
	PgbsonWriterInit(&finalWriter);

	pgbson_array_writer rolesArrayWriter;
	PgbsonWriterStartArray(&finalWriter, "roles", 5, &rolesArrayWriter);

	/*
	 * Build the role inheritance table once with a single query.
	 * This allows looking up parent/inherited roles in memory.
	 */
	HTAB *roleInheritanceTable = BuildRoleInheritanceTable();