LFC

Rate limit on object store

4

### What problem does the new feature solve? Remote object store vendors (like S3) all tend to have requests limit control. We should adapt that to avoid foreseeable errors and...

Support setting time range in `Copy From` statement

10

### What type of enhancement is this? User experience ### What does the enhancement do? As title. Currently there's `timestamp_range: Option` field in the `struct CopyTableRequest`, but it's not set....

Remove the unnecessary ser/de by substrait in standalone mode

3

### What type of enhancement is this? Performance ### What does the enhancement do? Currently the standalone use the same query engine just like distributed, which rewrites the logical plan...

Now the "[Functions](https://docs.greptime.cn/reference/sql/functions)" page is a little too fuzzy. It's hard for user to browser what functions greptimedb support. At lease when I want to find the UDAFs, I have...

chore: add more metrics about parquet and cache

2

I hereby agree to the terms of the [GreptimeDB CLA](https://github.com/GreptimeTeam/.github/blob/main/CLA.md). ## Refer to a related PR or issue link (optional) ## What's changed and what's your intention? as title useful...

### What type of enhancement is this? Tech debt reduction ### What does the enhancement do? Now the region lease duration is static: ```rust let region_lease_handler = RegionLeaseHandler::new( distributed_time_constants::REGION_LEASE_SECS,

Panic on arithmetic overflow when executing some UDAFs

2

### What type of bug is this? Unexpected error ### What subsystems are affected? Query Engine ### Minimal reproduce step Start a standalone instance, create a table like this: ```sql...

### What problem does the new feature solve? More balanced use of region's space. ### What does the feature do? Automatically or manually split a region if it's too big,...

Optimize heartbeat payload size

14

> If a datanode contains over 10,000 regions, i wonder that if the heartbeat request is too large. _Originally posted by @killme2008 in https://github.com/GreptimeTeam/greptimedb/pull/1558#discussion_r1196490874_ As the comment above suspects, it's...