presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/TransactionScopeCachingJdbcClient.java/TransactionScopeCachingJdbcClient/addColumn
class TransactionScopeCachingJdbcClient:    @Override
    public void addColumn(ConnectorSession session, JdbcTableHandle handle, ColumnMetadata column)
    {
        getColumnsCache.remove(handle);
        super.addColumn(session, handle, column);
    }