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feat(cypher): OPTIONAL MATCH with WITH/UNWIND stages (#1026) - #1044
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Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
This was referenced Apr 4, 2026
Add optional_reentry flag to CompiledCypherQuery, set when the reentry MATCH clause is optional. The executor null-fills unmatched prefix rows so WITH + OPTIONAL MATCH produces left-outer-join semantics instead of silently dropping unmatched rows. Known limitation: null-filled rows have all columns null (including prefix-carried values) because the fill happens after RETURN projection. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
… null-fill (#1026) - Clear empty_result_row when optional_reentry is set to prevent spurious null row on empty graphs - Lock multi-alias WITH rejection as known limitation (#1047) - Add tests: all-match, property on optional, empty graph, multi-row optional Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
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Summary
Support
OPTIONAL MATCHqueries with interleavedWITH/UNWIND/SKIP/LIMITstages between clauses (#1026).Part of the #996 OPTIONAL MATCH umbrella.
Status: WIP — investigation starting.
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