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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Performance GuideThe HCL OneDB™ Performance Guide describes how to configure and operate your HCL OneDB™ database server to improve overall system throughput and to improve the performance of SQL queries.
Improving individual query performanceYou can test, monitor, and improve queries.
Update statistics when they are not generated automaticallyThe UPDATE STATISTICS statement updates the statistics in the system catalog tables that the optimizer uses to determine the lowest-cost query plan.
Drop data distributions if necessary when upgradingWhen you upgrade to a new version of the database server, you might need to drop distributions to remove the old distribution structure in the sysdistrib system catalog table.

Drop data distributions if necessary when upgrading

When you upgrade to a new version of the database server, you might need to drop distributions to remove the old distribution structure in the sysdistrib system catalog table.

To drop the old distribution structure in the sysdistrib system catalog table, run this statement:

UPDATE STATISTICS DROP DISTRIBUTIONS;