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feat: ADBC-backed Spark DataSource for DataFusion table providers - #111

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timsaucer wants to merge 5 commits into

apache:mainfrom

timsaucer:feat/adbc-spark-connector

Draft

feat: ADBC-backed Spark DataSource for DataFusion table providers#111
timsaucer wants to merge 5 commits into
apache:mainfrom
timsaucer:feat/adbc-spark-connector

Commits on Jul 1, 2026
- feat: ADBC-backed Spark DataSource for DataFusion table providers
  
  timsaucer
  and
  claude
  committed
  60a824b
- feat(spark): cast non-Spark-native Arrow types source-side in ADBC scan
  
  timsaucer
  and
  claude
  committed
  ff9a205
- fix(spark): apply casts on count()/empty-projection scans
  
  timsaucer
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  claude
  committed
  3ecb971
- fix(spark): cast FixedSizeList to a variable List for Spark
  
  timsaucer
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  claude
  committed
  390691b
- refactor(spark): derive schema, cast decision, and cast target from one authority
  
  timsaucer
  and
  claude
  committed
  9f6e89d