fix: merge_insert uses full schema path for reordered columns#5541
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wjones127 merged 1 commit intolance-format:mainfrom Dec 19, 2025
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fix: merge_insert uses full schema path for reordered columns#5541wjones127 merged 1 commit intolance-format:mainfrom
wjones127 merged 1 commit intolance-format:mainfrom
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jackye1995
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Dec 18, 2025
| // Allow nullable source fields for non-nullable targets. | ||
| compare_nullability: NullabilityComparison::Ignore, | ||
| // Allow columns to be in a different order; they will be matched by name. | ||
| ignore_field_order: true, |
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in what case would we not want this behavior?
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It doesn't seem like we assert field order anywhere right now, but it seems like a useful capability. ArrowSchema PartialEq implementation is strict on field order. There are places like in query plans where field order matters.
jackye1995
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Dec 18, 2025
When merge_insert received columns in a different order than the dataset schema, it would fall back to the slower partial schema path. This adds `ignore_field_order: true` to the schema comparison so that reordered columns can use the more efficient full schema path. Fixes lance-format#5323 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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…format#5541) ## Summary - When `merge_insert` received columns in a different order than the dataset schema, it fell back to the slower partial schema path - Added `ignore_field_order: true` to the schema comparison so reordered columns can use the efficient full schema path - Added test verifying both the fast path eligibility and data correctness with reordered columns Fixes lance-format#5323 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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## Summary - When `merge_insert` received columns in a different order than the dataset schema, it fell back to the slower partial schema path - Added `ignore_field_order: true` to the schema comparison so reordered columns can use the efficient full schema path - Added test verifying both the fast path eligibility and data correctness with reordered columns Fixes #5323 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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Dec 30, 2025
…format#5541) ## Summary - When `merge_insert` received columns in a different order than the dataset schema, it fell back to the slower partial schema path - Added `ignore_field_order: true` to the schema comparison so reordered columns can use the efficient full schema path - Added test verifying both the fast path eligibility and data correctness with reordered columns Fixes lance-format#5323 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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…format#5541) ## Summary - When `merge_insert` received columns in a different order than the dataset schema, it fell back to the slower partial schema path - Added `ignore_field_order: true` to the schema comparison so reordered columns can use the efficient full schema path - Added test verifying both the fast path eligibility and data correctness with reordered columns Fixes lance-format#5323 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
merge_insertreceived columns in a different order than the dataset schema, it fell back to the slower partial schema pathignore_field_order: trueto the schema comparison so reordered columns can use the efficient full schema pathFixes #5323
🤖 Generated with Claude Code