Zihao Xu

feat(optimizer): support basic expression simplify rule

3

I hereby agree to the terms of the [RisingWave Labs, Inc. Contributor License Agreement](https://gist.github.com/TennyZhuang/f00be7f16996ea48effb049aa7be4d66#file-rw_cla). ## What's changed and what's your intention? related #14133. ## Checklist - [x] I have written...

feat(binder): convert to constant lookup when case when expression is in simple form

2

I hereby agree to the terms of the [RisingWave Labs, Inc. Contributor License Agreement](https://gist.github.com/TennyZhuang/f00be7f16996ea48effb049aa7be4d66#file-rw_cla). ## What's changed and what's your intention? As titled, related: #14317, specifically the following pattern. >...

feat(sql-udf): add hint display for non-existent functions

1

I hereby agree to the terms of the [RisingWave Labs, Inc. Contributor License Agreement](https://gist.github.com/TennyZhuang/f00be7f16996ea48effb049aa7be4d66#file-rw_cla). ## What's changed and what's your intention?  ## Checklist - [x] I have written necessary...

As discussed in unofficial discord.

feat: Add support for asynchronous flushing in DiskManager::WriteLog() && improve overall structure of DiskManager

7

This PR does four things in general: 1. Fix the issue #449 by adding a `log_io_latch_` to ensure logging operations' security under concurrency access.(Though the log-related functions are not used...

feat(planner): logical plan for rcte

2

I hereby agree to the terms of the [RisingWave Labs, Inc. Contributor License Agreement](https://gist.github.com/TennyZhuang/f00be7f16996ea48effb049aa7be4d66#file-rw_cla). ## What's changed and what's your intention? refer #16483. ## Checklist - [x] I have written...

wip.