Define an External Table with Single Row Error Isolation

The following example logs errors internally in Greenplum Database and sets an error threshold of 10 errors.

=# CREATE EXTERNAL TABLE ext_expenses ( name text,
    date date,        amount float4, category text, desc1 text )
    LOCATION ('gpfdist://etlhost-1:8081/*',
                    'gpfdist://etlhost-2:8082/*')
    FORMAT 'TEXT' (DELIMITER '|')
    LOG ERRORS SEGMENT REJECT LIMIT 10
       ROWS;

Use the built-in SQL function gp_read_error_log('external_table') to read the error log data. This example command displays the log errors for ext_expenses:

SELECT gp_read_error_log('ext_expenses');

For information about the format of the error log, see See: Viewing Bad Rows in the Error Log.

The built-in SQL function gp_truncate_error_log('external_table') deletes the error data. This example deletes the error log data created from the previous external table example :

SELECT gp_truncate_error_log('ext_expenses');