feat: support zonemap indexes in ALTER TABLE CREATE INDEX#466
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Closing in favor of #473 which contains all these changes plus the distributed build work. |
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hamersaw
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Jun 4, 2026
…516) ## Summary - Add zonemap as a new index type in `CREATE INDEX` DDL with distributed build support - Batch fragments into configurable segments via `num_segments` option (defaults to `spark.default.parallelism`) - Each segment is built in parallel on Spark executors and committed as a logical index on the driver - Zonemap indexes currently support single column only ## What Changed - `AddIndexExec.scala`: Zonemap-specific path with `ZonemapIndexJob`/`ZonemapIndexTask` and `commitIndexSegments` - `create-index.md`: Document zonemap index type, options, and usage - Tests: unit tests for segment creation/validation and integration test ## Notes - Rebased cleanly onto current `main` - Depends on lance-core `7.0.0-beta.10` or newer which includes zonemap segment support - Supersedes PR #473 and closed PR #466 ## Test plan - [x] CI passes (lint, unit tests, integration tests across all Spark/Scala versions) - [x] Zonemap index creation with default segment count - [x] Zonemap index creation with explicit `num_segments` - [x] Repeated zonemap index creation replaces existing segments - [x] Query correctness after zonemap index creation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Beinan Wang <beinanwang@microsoft.com>
ivscheianu
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Jun 12, 2026
…ance-format#516) ## Summary - Add zonemap as a new index type in `CREATE INDEX` DDL with distributed build support - Batch fragments into configurable segments via `num_segments` option (defaults to `spark.default.parallelism`) - Each segment is built in parallel on Spark executors and committed as a logical index on the driver - Zonemap indexes currently support single column only ## What Changed - `AddIndexExec.scala`: Zonemap-specific path with `ZonemapIndexJob`/`ZonemapIndexTask` and `commitIndexSegments` - `create-index.md`: Document zonemap index type, options, and usage - Tests: unit tests for segment creation/validation and integration test ## Notes - Rebased cleanly onto current `main` - Depends on lance-core `7.0.0-beta.10` or newer which includes zonemap segment support - Supersedes PR lance-format#473 and closed PR lance-format#466 ## Test plan - [x] CI passes (lint, unit tests, integration tests across all Spark/Scala versions) - [x] Zonemap index creation with default segment count - [x] Zonemap index creation with explicit `num_segments` - [x] Repeated zonemap index creation replaces existing segments - [x] Query correctness after zonemap index creation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Beinan Wang <beinanwang@microsoft.com>
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Summary
ALTER TABLE ... CREATE INDEXvia Lance directcreateIndexinstead of fragment trainingSHOW INDEXESand scan planning, and fix numeric zonemap pruning across mixed numeric typesTesting
./mvnw -pl lance-spark-4.0_2.13,lance-spark-4.1_2.13 -Dtest=AddIndexTest,ShowIndexesTest,ZonemapFragmentPrunerTest,CreateIndexStandardSyntaxTest -Dsurefire.failIfNoSpecifiedTests=false test./mvnw -pl lance-spark-4.0_2.13,lance-spark-4.1_2.13 -Dtest=AddIndexTest,ShowIndexesTest -Dsurefire.failIfNoSpecifiedTests=false testNotes
CREATE INDEXsyntax accepts a column list, but current Lance core rejects multi-column zonemap creation withLanceError(Index): Only support building index on 1 column at the momentZonemap index currently supports a single column onlypytestor the expected/home/lance/datafixture path