feat: introduce schema evolution on RecordBatchWriter #2024
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ACTION NEEDED delta-rs follows the Conventional Commits specification for release automation. The PR title and description are used as the merge commit message. Please update your PR title and description to match the specification. |
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Very excited to see this feature merged into the lib, this is the last blocker to adopting delta-rs for processing small to medium datasets outside of Spark! :) |
This commit introduces the `WriteMode` enum and the ability to specify writes which should enable [schema evolution](https://delta.io/blog/2023-02-08-delta-lake-schema-evolution/). The result of this is a new `metaData` action added to the transaction log with the write which reflects the updated schema There are some caveats however such as all writes must include non-nullable columns. This change does not modify the Write operation which has a datafusion dependency. Unfortunately we have some redundancy in API surface insofar that the writer in src/operations/ just performs parquet writes. The Write operation however requires datafusion and wiull actually effect transaction log writes. Fixes delta-io#1386 Sponsored-by: Raft, LLC.
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ion-elgreco
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| let second_data = serde_json::json!( | ||
| { | ||
| "id" : 1, | ||
| "name" : "Ion" |
ion-elgreco
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Feb 5, 2024
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This commit introduces the
WriteModeenum and the ability to specify writes which should enable schemaevolution.
The result of this is a new
metaDataaction added to the transaction log with the write which reflects the updated schemaThere are some caveats however such as all writes must include non-nullable columns.
Fixes #1386
Sponsored-by: Raft, LLC.