presto-hive/src/main/java/io/prestosql/plugin/hive/security/SystemTableAwareAccessControl.java/SystemTableAwareAccessControl/filterColumns
class SystemTableAwareAccessControl:    @Override
    public List<ColumnMetadata> filterColumns(ConnectorSecurityContext context, SchemaTableName tableName, List<ColumnMetadata> columns)
    {
        Optional<SchemaTableName> sourceTableName = getSourceTableNameFromSystemTable(tableName);
        if (sourceTableName.isPresent()) {
            return filterColumns(context, sourceTableName.get(), columns);
        }
        return delegate.filterColumns(context, tableName, columns);
    }