junxiangMu

Results 17 issues of junxiangMu

### Is your feature request related to a problem or challenge? sub-issue of #9285 ### Describe the solution you'd like _No response_ ### Describe alternatives you've considered _No response_ ###...

enhancement

## Which issue does this PR close? Closes #9261. ## Rationale for this change add a new function `nvl` ## What changes are included in this PR? ## Are these...

sqllogictest

Thank you @guojidan -- this looks good to me. I think as a follow on PR it would be nice to consolidate all the `InList` rewrites into a single pass...

good first issue

### Is your feature request related to a problem or challenge? https://docs.databend.com/sql/sql-functions/conditional-functions/ifnull I want implement `IFNULL` function, As implemented by `databend` ### Describe the solution you'd like _No response_ ###...

enhancement

closed: #1077 **Checklist** - [ ] Updated guide with pertinent info (may not always apply). - [x] Squash down commits to one or two logical commits which clearly describe the...

## Which issue does this PR close? Closes #9527 . ## Rationale for this change allow user define simply rule ## What changes are included in this PR? add `WindowUDFImpl::simplfy()`...

logical-expr
optimizer

closed: #10347 I have tested it locally, It seems to be working properly 🤔

need/author-input

### Search before asking - [X] I had searched in the [issues](https://github.com/datafuselabs/databend/issues) and found no similar issues. ### Version main branch ### What's Wrong? I excute sql `SELECT IFNULL(NULL);` databend...

C-bug