Example:
dbadmin=> SELECT DISTINCT ddl
dbadmin-> FROM (SELECT CASE
dbadmin(> WHEN current_level = 'DATABASE' OR (current_level = 'DEFAULT' AND INSTR(allowed_levels, 'DATABASE') > 0) THEN
dbadmin(> 'SELECT set_config_parameter(''' || parameter || ''', ''' || value || ''');'
dbadmin(> WHEN current_level = 'NODE' THEN
dbadmin(> 'ALTER NODE ' || configuration_changes.node_name || ' SET ' || parameter || ' = ''' || value || ''';'
dbadmin(> END AS ddl
dbadmin(> FROM configuration_changes
dbadmin(> JOIN configuration_parameters
dbadmin(> ON parameter = parameter_name
dbadmin(> WHERE allowed_levels <> 'SESSION'
dbadmin(> LIMIT 1 OVER (PARTITION BY configuration_changes.node_name, parameter ORDER BY event_timestamp DESC)) foo
dbadmin-> ORDER BY 1;
ddl
------------------------------------------------------------------
ALTER NODE v_test_db_node0001 SET TransactionMode = 'READ ONLY';
ALTER NODE v_test_db_node0002 SET TransactionMode = 'READ ONLY';
ALTER NODE v_test_db_node0003 SET TransactionMode = 'READ ONLY';
SELECT set_config_parameter('AWSEndpoint', '10.180.112.34');
SELECT set_config_parameter('AWSRegion', 'us-east-1');
SELECT set_config_parameter('AuditConfidenceLevel', '0');
SELECT set_config_parameter('AuditErrorTolerance', '100');
SELECT set_config_parameter('EnableForceOuter', '1');
SELECT set_config_parameter('EnableResegmentMerge', '0');
SELECT set_config_parameter('MaxParsedQuerySizeMB', '5120');
SELECT set_config_parameter('SortWorkerThreads', '5');
(11 rows)
Helpful Links:
https://www.vertica.com/docs/latest/HTML/Content/Authoring/SQLReferenceManual/SystemTables/MONITOR/CONFIGURATION_PARAMETERS.htm https://www.vertica.com/docs/latest/HTML/Content/Authoring/SQLReferenceManual/SystemTables/MONITOR/CONFIGURATION_CHANGES.htm
Have fun!
About the Author
James Knicely
Vertica Field Chief Technologist
I've had the privilege of working with many database technologies in my career. But after being introduced to Vertica in May of 2011 as a client, I was hooked on the new technology after witnessing a query run in milliseconds that had previously ran for hours on the legacy database we had in place. It was then that I knew I wanted to eventually join the Vertica team, and 4 years later I did! I am currently a Vertica evangelist and am ready to help you get on board! Please feel free to reach out to me with any questions you have about Vertica and make sure to follow my Vertica Quick Tips!
