tangenta

[WIP] ddl: add index acceleration

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### What problem does this PR solve? Issue Number: close #35983 Problem Summary: ### What is changed and how it works? ### Check List Tests - [ ] Unit test...

## Bug Report Please answer these questions before submitting your issue. Thanks! ### 1. Minimal reproduce step (Required) ```sql drop table if exists tbl_5; create table tbl_5 (col_83 enum('Alice','Bob','Charlie','David')); insert...

*: support specifying range bits for auto_random

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### What problem does this PR solve? Issue Number: close https://github.com/pingcap/tidb/issues/32508 Problem Summary: Previously, `auto_random` column makes use of the highest several bits for shard. An `auto_random` ID can be...

`json_objectagg()` is not compatible with MySQL on `varbinary` type

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## Bug Report Please answer these questions before submitting your issue. Thanks! ### 1. Minimal reproduce step (Required) ```sql drop table if exists tbl_0; create table tbl_0 (col_2 int, col_3...

mysql-schema.md: update system tables

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### First-time contributors' checklist - [x] 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) ### Which...

auto-random.md: rewrite the document

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### First-time contributors' checklist - [x] 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) ### Which...

add doc for `tidb_last_query_info` and `tidb_shard_allocate_step`

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### First-time contributors' checklist - [x] 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) ### Which...

ddl: support tracing adding index

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### What problem does this PR solve? Issue Number: close #xxx Problem Summary: ### What is changed and how it works? This PR adds a summary to the log: ```sql...

Selection on merge join could not find column

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## Bug Report Please answer these questions before submitting your issue. Thanks! ### 1. Minimal reproduce step (Required) ```sql drop table if exists t1, t2; create table t1 ( id...

ddl: fetch data with coprocessor for create index

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### What problem does this PR solve? Issue Number: ref #35983 Problem Summary: ### What is changed and how it works? ### Check List Tests - [ ] Unit test...