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feat(spark): datafusion-spark-bridge Rust SDK (2/6)#2
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New `spark/bridge` workspace crate providing the `export_bridge!` macro that generates the six JNI entry points a Spark connector bridge exposes (providerSchemaIpc, createScan, partitionCount, executeStreamPartition, executeStream, closeScan). Includes the options decoder, scan planning/execution glue, and the Arrow type-widening layer (wraps any TableProvider for Spark type compatibility). Self-contained SDK with no Java/Scala coupling. Depends only on datafusion-jni-common. Second of the 6-PR connector stack. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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datafusion-spark-bridgeRust SDK — the foundation a domain connector ("bridge") builds on. Itsexport_bridge!macro generates the JNI entry points the JVM side calls (schema probe, scan create/execute/close), and it bundles the options decoder, scan planning/execution glue, and the Arrow type-widening layer for Spark type compatibility.Self-contained SDK with no JVM-side coupling; depends only on
native-common.Depends on #1.
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