feat: MERGE condition columns in column lineage (Gaps 3, 9, 10)#64

Merged

mingjerli merged 9 commits into

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worktree-merge-condition-lineage

Apr 14, 2026

Commits on Apr 14, 2026

feat: add merge_column_role field to ColumnEdge model
mingjerli
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feat: extract literal-bound ON predicates in MERGE (Gap 9)
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feat: emit lineage edges for MERGE ON literal filter columns (Gap 9)
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feat: parse WHEN condition columns and emit condition-gating edges (Gap 3+10)
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feat: extract condition columns for NOT MATCHED INSERT actions
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test: add SCD2 integration tests for MERGE condition lineage
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feat: include merge_column_role in JSON export
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docs: improve comments for merge_column_role and NOT MATCHED default_table
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docs: add condition column lineage examples to merge notebook
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