[MDEV-17422] Fix documentation on split_grouping_derived and split_materialized Created: 2018-10-10 Updated: 2020-08-25 Resolved: 2018-10-11 |
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| Status: | Closed |
| Project: | MariaDB Server |
| Component/s: | Documentation - Support, Optimizer |
| Fix Version/s: | N/A |
| Type: | Task | Priority: | Major |
| Reporter: | Geoff Montee (Inactive) | Assignee: | Ian Gilfillan |
| Resolution: | Fixed | Votes: | 0 |
| Labels: | None | ||
| Description |
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MariaDB 10.3 supposedly added a new optimization related to derived tables:
https://mariadb.com/kb/en/library/changes-improvements-in-mariadb-103/#optimizerperformance
https://mariadb.com/kb/en/library/optimizer-switch/#available-flags However, at some point, the split_grouping_derived optimizer_switch was removed, and it was replaced with split_materialized. The documentation was never updated. |
| Comments |
| Comment by Geoff Montee (Inactive) [ 2018-10-10 ] |
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psergey and igor can probably provide details on exactly when this change was made. |
| Comment by Sergei Petrunia [ 2018-10-12 ] |
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GeoffMontee, here's the change that made it: https://github.com/MariaDB/server/commit/4f0299f8b3cf19c103138ff656a37c1f672e9de6 . That page shows it was done in 10.3.4. |