Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.5, 10.6, 10.3(EOL), 10.4(EOL), 10.7(EOL), 10.8(EOL)
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None
Description
When we need to add/remove or change LIMIT, INTERVAL, AUTO we have to recreate partitioning from scratch. Such operations should be done fast. To remove options like LIMIT or INTERVAL one should write:
alter table t1 partition by system_time; |
The command checks whether it is new or existing SYSTEM_TIME partitioning. And in the case of new it behaves as CREATE would do: adds default number of partitions (2). If SYSTEM_TIME partitioning already existed it just changes its options: removes unspecified ones and adds/changes those specified explicitly. In case when partitions list was supplied it behaves as usual: does full repartitioning.
Examples:
create or replace table t1 (x int) with system versioning |
partition by system_time limit 100 partitions 4; |
# Change LIMIT
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alter table t1 partition by system_time limit 33; |
# Remove LIMIT
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alter table t1 partition by system_time; |
# This does full repartitioning |
alter table t1 partition by system_time limit 33 partitions 4; |
# This does data copy as pruning will require records in correct partitions |
alter table t1 partition by system_time interval 1 hour |
starts '2000-01-01 00:00:00'; |
# But this works fast, LIMIT will apply to DML commands |
alter table t1 partition by system_time limit 33; |
Attachments
Issue Links
- is blocked by
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MDEV-19903 Setup default partitions for system versioning
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- Closed
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- is duplicated by
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- Closed
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