Yingwen

### What type of bug is this? Other ### What subsystems are affected? Other ### What happened? The test timed out in this [job](https://github.com/GreptimeTeam/greptimedb/actions/runs/3647050802/jobs/6158812610) ### What operating system did you...

### What type of enhancement is this? Refactor ### What does the enhancement do? Discussed in https://github.com/GreptimeTeam/greptimedb/discussions/349 Originally posted by **evenyag** October 25, 2022 Now we have RegionSchema and TableInfo...

Support parallel scan in mito engine

1

### What type of enhancement is this? Performance ### What does the enhancement do? Currently, the Mito engine only supports single-threaded scanning. We can consider using parallel scanning to improve...

Writing manifest files outside of the write thread

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### What type of enhancement is this? Performance ### What does the enhancement do? As mentioned in https://github.com/GreptimeTeam/greptimedb/issues/3447#issuecomment-1982284075, we write manifest files inside the region worker thread (the write thread)...

### What type of enhancement is this? Performance ### What does the enhancement do? Now we cache pages for the whole row group if there is a cache miss. https://github.com/GreptimeTeam/greptimedb/blob/102e43aace8108012f94781e567caa57f329b810/src/mito2/src/sst/parquet/row_group.rs#L241-L250...

Transforms some filters into range scans

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### What type of enhancement is this? Performance ### What does the enhancement do? Converts query conditions into primary key ranges to scan. Here is an example from TiDB's docs:...

Our standalone quick start guide doesn't mention that we listen on `127.0.0.1` by default. https://docs.greptime.com/getting-started/installation/greptimedb-standalone We should give some examples for it.

Unable to reuse the PrometheusLayer with the same registry

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As mentioned in https://github.com/GreptimeTeam/greptimedb/pull/4277#issuecomment-2208390871, the `PrometheusLayer` will create a new `PrometheusMetrics` each time we register it to an `OperatorBuilder`. https://github.com/apache/opendal/blob/174bda53f79123cd114d2409189423a0a4cf6bf3/core/src/layers/prometheus.rs#L154-L163 However, the registry panics if we create `PrometheusMetrics` with the...

### What type of enhancement is this? User experience ### What does the enhancement do? `explan verbose analyze` can't push down the `verbose` flag ``` explain analyze verbose select hostname,...

Remove unnecessary traits and wrapper types from the query crate

5

### What type of enhancement is this? Refactor ### What does the enhancement do? We defined some wrapper types and traits for the query engine - [x] [Expr](https://github.com/GreptimeTeam/greptimedb/blob/d99746385b8da491d31a953b1d26a348cf00bc73/src/common/query/src/logical_plan/expr.rs#L22-L27) https://github.com/GreptimeTeam/greptimedb/pull/3995 -...