xzhangxian1008

## Feature Request Command `tiup playground nightly` will start with the latest version while I hope to use a previous version. the latest version: v5.0.0-nightly-20210624 target version: v5.0.0-nightly-20210617 try the...

executor: Support Parallel Sort

17

### What problem does this PR solve? Issue Number: close #49217 Problem Summary: ### What changed and how does it work? #### Golang Builtin Benchmark ``` Unparallel Sort: BenchmarkSortExec/(rows:300000,_orderBy:[0_1],_ndvs:_[0_0])-72 254143338...

## Enhancement - [x] Change the name of `ListInDisk` and update comment https://github.com/pingcap/tidb/pull/47777 - [x] Add `DataInDiskByChunks` and replace the `DataInDiskByRows` in agg executor with `DataInDiskByChunks` https://github.com/pingcap/tidb/pull/48160 - [x] Support...

Spill of parallel aggregation in TiDB

4

### First-time contributors' checklist - [ ] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs) that's required for repo owners to accept my contribution. ### What is changed, added or deleted? (Required) ###...

Spill of parallel aggregation in TiDB

9

### First-time contributors' checklist - [ ] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs-cn) that's required for repo owners to accept my contribution. ### What is changed, added or deleted? (Required) ###...

Clangd can't jump to the right position

20

Please describe the problem. For hints on what information is helpful, see: https://clangd.llvm.org/troubleshooting.html When I want to go the definition, clangd will often bring me to a strang position. I...

[BUG] miniob crashes when concurrently creating tables

10

**Describe the bug** A clear and concise description of what the bug is. ** Environment** Environment Details sometimes important - OS Version: Linux 10-2-12-124 5.14.0-284.18.1.el9_2.x86_64 - CPU Arch(x86/arm): x86 -...

store: remove stores that have no region before balance

6

### What problem does this PR solve? Issue Number: ref #52313 Problem Summary: ### What changed and how does it work? ### Check List Tests - [x] Unit test -...

executor: Support TopN Spill

15

### What problem does this PR solve? Issue Number: ref #47733 Problem Summary: ### What changed and how does it work? ### Check List Tests - [x] Unit test -...

executor: remove unnecessary memory allocation in (*HashAggExec).initPartialWorkers

12

### What problem does this PR solve? Issue Number: close #52321 Problem Summary: ### What changed and how does it work?  no optimization  optimization [no optimization flame graph](http://10.2.12.124:2479/dashboard/speedscope/#profileURL=%2Fdashboard%2Fapi%2Fprofiling%2Fsingle%2Fview%3Ftoken%3DeyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJkYXRhIjoiMSIsImV4cCI6MTcxMzkyNzI2OSwiaXNzIjoicHJvZmlsaW5nL3NpbmdsZV92aWV3In0.YVvSnvDoxXuVGwRK4c6oNrmMdY-w_9SQXkBCaRehgVc%26output_type%3Dprotobuf&title=tidb_10.2.12.124:8001)...