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## Which issue does this PR close? Closes #10270 . ## Rationale for this change ## What changes are included in this PR? ## Are these changes tested? ## Are...

yyy1000

Note it has code from https://github.com/apache/datafusion/pull/10410 so that might good to review first ## Which issue does this PR close? Closes https://github.com/apache/datafusion/issues/10210 Part of https://github.com/apache/arrow-datafusion/issues/9637 -- let's make DataFusion planning...

alamb

Only recompute schema in `TypeCoercion` when necessary

2

Draft as it builds on https://github.com/apache/datafusion/pull/10356 ## Which issue does this PR close? closes https://github.com/apache/datafusion/issues/10365 ## Rationale for this change recomputing the Schema can be expensive, so only do it...

alamb

Better timezone functionalities

6

### Is your feature request related to a problem or challenge? It would be nice if Datafusion has support for better timezone functionalities. Though painful, local time is often used...

Abdullahsab3

Add simplify method to aggregate function

21

## Which issue does this PR close? Closes #9526. ## Rationale for this change ## What changes are included in this PR? ## Are these changes tested? yes, added new...

milenkovicm

(this has 4 lines of code change and the rest are test updates to remove `&`) ## Which issue does this PR close? Part of https://github.com/apache/datafusion/issues/9637 ## Rationale for this...

alamb

Avoid inlining non deterministic CTE

4

### Describe the bug Currently Datafusion will inline all CTE, a non-deterministic expression can be executed multiple times producing different results ### To Reproduce Consider the following query which uses...

tgujar

RFC: Make it easier to call window functions via expression API (and add example)

7

before polishing this PR up I wanted to get some feedback on the approach # Which issue does this PR close? Related to https://github.com/apache/arrow-datafusion/issues/5781 Closes: https://github.com/apache/arrow-datafusion/issues/6747 # Rationale for this...

alamb

### Is your feature request related to a problem or challenge? Part of https://github.com/apache/datafusion/issues/10210 we are trying to make the optimizer faster by making the different optimizer passes faster. https://github.com/apache/datafusion/pull/10356...

alamb

feat: run expression simplifier in a loop until no changes

3

## Which issue does this PR close? Closes #1160. ## Rationale for this change ## What changes are included in this PR? ## Are these changes tested? yes ## Are...

erratic-pattern