presto-hive/src/main/java/io/prestosql/plugin/hive/HiveMetadata.java/HiveMetadata/addColumn
class HiveMetadata:    @Override
    public void addColumn(ConnectorSession session, ConnectorTableHandle tableHandle, ColumnMetadata column)
    {
        HiveTableHandle handle = (HiveTableHandle) tableHandle;
        failIfAvroSchemaIsSet(session, handle);

        metastore.addColumn(new HiveIdentity(session), handle.getSchemaName(), handle.getTableName(), column.getName(), toHiveType(typeTranslator, column.getType()), column.getComment());
    }