Temporal tables should be row partitioned to improve query performance. Partitioning can logically group the table rows into current and history rows. Queries of current rows are directed automatically to the partition containing the current rows.
Example: Row Partitioning an ANSI Valid-Time Table
To row partition a valid-time table, use the following PARTITION BY clause.
CREATE MULTISET TABLE employee_vt ( eid INTEGER NOT NULL, ename VARCHAR(5) NOT NULL, terms VARCHAR(5), job_start DATE NOT NULL, job_end DATE NOT NULL, PERIOD FOR job_dur(job_start,job_end) AS VALIDTIME ) PRIMARY INDEX(eid) PARTITION BY CASE_N( END(job_dur)>= CURRENT_DATE AT INTERVAL - 12:59' HOUR TO MINUTE, NO CASE);
Maintaining a Current Partition
As time passes, and current rows become history rows, you should periodically use the ALTER TABLE TO CURRENT statement to transition history rows out of the current partition into the history partition. ALTER TABLE TO CURRENT resolves the partitioning expressions again, transitioning rows to their appropriate partitions per the updated partitioning expressions. For example:
ALTER TABLE temporal_table_name TO CURRENT;
This statement also updates any system-defined join indexes that were automatically created for primary key and unique constraints defined on the table.