David

Results 7 issues of David

## Development Task ### Description Before Postgres sends data result back to client, it will first give description about the data it’s returning, aka Row description. After sending the data...

This PR aims unify `CodecPDClient` and `CodecPDClientV2` by introducing a `Codec` interface.

add role field to ru request to better differentiate between different source of resource usage.

### What problem does this PR solve? Issue Number: Close #7444 ### What is changed and how does it work? Added an option to skip splitting rawkv regions. ```commit-message ```...

status/LGT1
needs-rebase
size/L
release-note-none
ok-to-test

do-not-merge/work-in-progress
size/XL