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3d25939f0c
graphql-engine/v3/crates/sql
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Phil Freeman 3d25939f0c [PACHA-14] Order by pushdown (#970) 
<!-- The PR description should answer 2 important questions: -->

### What

Implements a new optimizer pass which pushes sort stages inside
`ModelQuery` stages.

### How

<!-- How is it trying to accomplish it (what are the implementation
steps)? -->

V3_GIT_ORIGIN_REV_ID: 2820f88003aec376b71605c0f753d7b50825ddad
2024-08-16 23:57:09 +00:00
..
src [PACHA-14] Order by pushdown (#970) 2024-08-16 23:57:09 +00:00
Cargo.toml Update dependencies in preparation for some cloud work. (#972) 2024-08-15 09:32:07 +00:00
readme.md Refactor SQL layer to use OpenDD query IR (#925) 2024-08-05 23:38:19 +00:00

readme.md

SQL Interface

An experimental SQL interface over OpenDD models. This is mostly targeted at AI use cases for now - GenAI models are better at generating SQL queries than GraphQL queries.

This is implemented using the Apache DataFusion Query Engine by deriving the SQL metadata for datafusion from Open DDS metadata. As the implementation currently stands, once we get a LogicalPlan from datafusion we replace TableScans with NDC queries to the underlying connector. There is a rudimentary optimizer that pushes down projections to the opendd query so that we don't fetch all the columns of a collection.