presto-main/src/main/java/io/prestosql/metadata/MetadataManager.java/MetadataManager/renameSchema
class MetadataManager:    @Override
    public void renameSchema(Session session, CatalogSchemaName source, String target)
    {
        CatalogMetadata catalogMetadata = getCatalogMetadataForWrite(session, source.getCatalogName());
        CatalogName catalogName = catalogMetadata.getCatalogName();
        ConnectorMetadata metadata = catalogMetadata.getMetadata();
        metadata.renameSchema(session.toConnectorSession(catalogName), source.getSchemaName(), target);
    }