94a93e56ff
* feat: move tag_column_names into rpc planner * fix: Apply suggestions from code review Co-authored-by: Carol (Nichols || Goulding) <193874+carols10cents@users.noreply.github.com> * fix: Apply suggestions from code review Co-authored-by: Carol (Nichols || Goulding) <193874+carols10cents@users.noreply.github.com> * fix: compile error * refactor: remove PassThrough error type * fix: Avoid extra layers of errors in mutable buffer chunk * fix: use HashMap::get rather than values() and find * fix: push filtering down to chunk in gRPC planner * fix: fixup trait bounds to be non-silly * fix: remove incorrect comment * fix: remove cruft * fix: clippy + fmt * fix: correct comment Co-authored-by: Carol (Nichols || Goulding) <193874+carols10cents@users.noreply.github.com> |
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| .. | ||
| src | ||
| Cargo.toml | ||
| README.md | ||
README.md
IOx Query Layer
The IOx query layer is responsible for translating query requests from different query languages and planning and executing them against Chunks stored across various IOx storage systems.
Query Frontends
- SQL
- Storage gRPC
- Flux (possibly in the future)
- InfluxQL (possibly in the future)
- Others (possibly in the future)
Sources of Chunk data
- ReadBuffer
- MutableBuffer
- Parquet Files
- Others (possibly in the future, like Remote Chunk?)
The goal is to use the shared query / plan representation in order to avoid N*M combinations of language and Chunk source.
Thus query planning is implemented in terms of traits, and those traits are implemented by different chunk implementations.
Among other things, this means that this crate should not depend directly on the ReadBuffer or the MutableBuffer.
┌───────────────┐ ┌────────────────┐ ┌──────────────┐ ┌──────────────┐
│Mutable Buffer │ │ Read Buffer │ │Parquet Files │ ... │Future Source │
│ │ │ │ │ │ │ │
└───────────────┘ └────────────────┘ └──────────────┘ └──────────────┘
▲ ▲ ▲ ▲
└───────────────────┴─────────┬──────────┴─────────────────────┘
│
│
┌─────────────────────────────────┐
│ Shared Common │
│ Predicate, Plans, Execution │
└─────────────────────────────────┘
▲
│
│
┌──────────────────────┼─────────────────────────┐
│ │ │
│ │ │
│ │ │
┌───────────────────┐ ┌──────────────────┐ ┌──────────────────┐
│ SQL Frontend │ │ gRPC Storage │ ... │ Future Frontend │
│ │ │ Frontend │ │ (e.g. InfluxQL) │
└───────────────────┘ └──────────────────┘ └──────────────────┘
We are trying to avoid ending up with something like this:
┌─────────────────────────────────────────────────┐
│ │
▼ │
┌────────────┐ │
│Read Buffer │ ┌────────────────────────┤
┌──────────┼────────────┼─────┬────────────┼────────────────────────┤
│ └────────────┘ │ ▼ │
▼ ▲ │ ┌──────────────┐ │
┌───────────────┐ │ │ │Parquet Files │ │
│Mutable Buffer │ │ ├───▶│ │... │
│ │◀────────┼───────────┤ └──────────────┘ ┌─────────────┼┐
└───────────────┘ │ │ ▲ │Future Source││
▲ │ ├────────────┼─────────▶│ ││◀─┐
│ │ │ │ └─────────────┼┘ │
│ │ │ │ │ │
│ │ │ │ │ │
│ ┌──────────┘ │ │ │ │
│ │ │ │ │ │
│ ├──────────────────────┼────────────┘ │ │
└──────┤ │ │ │
│ │ │ │
│ │ │ │
│ │ │ │
│ │ │ │
│ │ │ │
│ │ │ │
│ │ │ │
┌───────────────────┐ ┌──────────────────┐ ┌──────────────────┐ │ │
│ SQL Frontend │ │ gRPC Storage │ ... │ Future Frontend │ │ │
│ │ │ Frontend │ │ (e.g. InfluxQL) │──┴───┘
└───────────────────┘ └──────────────────┘ └──────────────────┘