vegafusion-datafusion-udfs
| Crates.io | vegafusion-datafusion-udfs |
| lib.rs | vegafusion-datafusion-udfs |
| version | 1.6.9 |
| created_at | 2023-03-16 12:29:30.522966+00 |
| updated_at | 2024-05-09 19:15:20.865596+00 |
| description | Custom DataFusion UDFs used by VegaFusion |
| homepage | |
| repository | |
| max_upload_size | |
| id | 811472 |
| size | 104,389 |
Jon Mease (jonmmease)
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README
vegafusion-datafusion-udfs
This crate contains the definitions of the DataFusion UDFs that are used to implement select Vega expression functions and transforms. These UDFs are used in two places.
- The
DataFusionConnectionprovided byvegafusion-sqladds these UDFs to itsSessionContextso that they are available for use in SQL querires. - The
vegafusion-runtimecrate uses these UDFs for the evaluation of signal expressions and for simplifying expressions passed to thefilterandformulatransforms. Note: Even when a non-DataFusion Connection is used, DataFusion is still used for signal evaluation and expression simplification.