增加统计信息，算子增加代价评估
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- Dominant language
- C++
- Stars
- 4.4k
- Forks
- 1.6k
- PR merge metrics
- No merged PRs in 30d
Description
Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
当前算子没有代价，无法根据代价进行优化
Describe the solution you'd like
A clear and concise description of what you want to happen.
增加表、列、索引统计信息，算子增加代价评估
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue identifies table, column, and index statistics plus operator cost evaluation, but names no files, tests, or entry points. Begin by locating the optimizer and operator implementations, then determine how statistics and costs should feed optimization. Done should include the requested statistics and cost-based optimization behavior, with tests demonstrating it.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- databases
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100