pingcap / pingcap/docs-cn

docs: add description about optimizer hint

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Description

File: /master/optimizer-hints.md

please add these items:

INDEX_JOIN
INDEX_HASH_JOIN
INDEX_MERGE_JOIN

ref asktug topic: https://asktug.com/t/topic/1015619

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Open optimizer-hints.md and review the existing optimizer hint descriptions and formatting. Add descriptions for INDEX_JOIN, INDEX_HASH_JOIN, and INDEX_MERGE_JOIN, using the linked AskTUG topic as reference. Done means all three hints are documented consistently in that file.

Written by the indexing model from the issue text.

Assessment

Domain
documentation
Issue type
Documentation
Difficulty
1/5
Estimated time
Under an hour
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
55/100

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