matrixorigin / matrixorigin/matrixone

[Tech Request]: support read from cache without copy

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#16,387 2 comments 0 reactions 1 assignee Claimed by @LeftHandCold View on GitHub
area/performance kind/tech-request needs-triage priority/p0
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Description

### Is there an existing issue for the same tech request?

- [X] I have checked the existing issues.

### Does this tech request not affect user experience?

- [X] This tech request doesn't affect user experience.

### What would you like to be added ?

```Markdown
1. Don't in place update a read-only vector
2. Always free the vector read from the cache when the pipeline is terminated
3. Attach a sel bitmap to the batch indicating the valid rows
```

### Why is this needed ?

_No response_

### Additional information

_No response_

Contributor guide

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Assessment

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