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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2021/11/10 07:44:11 UTC
[GitHub] [incubator-doris] EmmyMiao87 opened a new pull request #7076: Add session variable to close join order
EmmyMiao87 opened a new pull request #7076:
URL: https://github.com/apache/incubator-doris/pull/7076
## Proposed changes
The new session variable 'close_join_reorder' is used to turn off all automatic join reorder algorithms.
If close_join_reorder is true, the Doris will execute query by the order in the original query.
## Types of changes
What types of changes does your code introduce to Doris?
_Put an `x` in the boxes that apply_
- [ ] Bugfix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
- [ ] Documentation Update (if none of the other choices apply)
- [ ] Code refactor (Modify the code structure, format the code, etc...)
- [ ] Optimization. Including functional usability improvements and performance improvements.
- [ ] Dependency. Such as changes related to third-party components.
- [ ] Other.
## Checklist
_Put an `x` in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code._
- [ ] I have created an issue on (Fix #ISSUE) and described the bug/feature there in detail
- [ ] Compiling and unit tests pass locally with my changes
- [ ] I have added tests that prove my fix is effective or that my feature works
- [ ] If these changes need document changes, I have updated the document
- [ ] Any dependent changes have been merged
## Further comments
If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...
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[GitHub] [incubator-doris] EmmyMiao87 commented on pull request #7076: Add session variable to close join order
Posted by GitBox <gi...@apache.org>.
EmmyMiao87 commented on pull request #7076:
URL: https://github.com/apache/incubator-doris/pull/7076#issuecomment-965956929
> Nit
OK，I change the session variable name to 'disable_join_reorder'
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[GitHub] [incubator-doris] morningman merged pull request #7076: Add session variable to close join order
Posted by GitBox <gi...@apache.org>.
morningman merged pull request #7076:
URL: https://github.com/apache/incubator-doris/pull/7076
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[GitHub] [incubator-doris] github-actions[bot] commented on pull request #7076: Add session variable to close join order
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on pull request #7076:
URL: https://github.com/apache/incubator-doris/pull/7076#issuecomment-966390974
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[GitHub] [incubator-doris] wangshuo128 edited a comment on pull request #7076: Add session variable to close join order
Posted by GitBox <gi...@apache.org>.
wangshuo128 edited a comment on pull request #7076:
URL: https://github.com/apache/incubator-doris/pull/7076#issuecomment-964871525
Nit: should we unify the prefix of configs that means "enable something", "close something", "disable something", ect.
IIUC, the unified naming strategy would help end-users to use our system more easily.
Considering that we have already lots of configs starting with "enable_", I'd suggest renaming `close_join_reorder` to `enable_join_reorder`. WDYT?
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[GitHub] [incubator-doris] wangshuo128 edited a comment on pull request #7076: Add session variable to close join order
Posted by GitBox <gi...@apache.org>.
wangshuo128 edited a comment on pull request #7076:
URL: https://github.com/apache/incubator-doris/pull/7076#issuecomment-964871525
Nit: should we unify the prefix of configs that means "enable something", "close something", "disable something", etc.
IIUC, the unified naming strategy would help end-users to use our system more easily.
Considering that we have already lots of configs starting with "enable_", I'd suggest renaming `close_join_reorder` to `enable_join_reorder`. WDYT?
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[GitHub] [incubator-doris] wangshuo128 commented on pull request #7076: Add session variable to close join order
Posted by GitBox <gi...@apache.org>.
wangshuo128 commented on pull request #7076:
URL: https://github.com/apache/incubator-doris/pull/7076#issuecomment-964871525
Nit: should we unify the prefix of configs that means "enable something" or "close something".
IIUC, the unified naming strategy would help end-users to use our system more easily.
Considering that we have already lots of configs starting with "enable_", I'd suggest renaming `close_join_reorder` to `enable_join_reorder`. WDYT?
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[GitHub] [incubator-doris] morningman commented on a change in pull request #7076: Add session variable to close join order
Posted by GitBox <gi...@apache.org>.
morningman commented on a change in pull request #7076:
URL: https://github.com/apache/incubator-doris/pull/7076#discussion_r746628897
##########
File path: fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java
##########
@@ -384,6 +387,9 @@
@VariableMgr.VarAttr(name = ENABLE_LATERAL_VIEW, needForward = true)
public boolean enableLateralView = false;
+ @VariableMgr.VarAttr(name = CLOSE_JOIN_REORDER)
+ private boolean closeJoinReorder = false;
Review comment:
```suggestion
private boolean disableJoinReorder = false;
```
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