Implement LEAD, LAG, FIRST_VALUE, and LAST_VALUE window functions#2412

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Copilot wants to merge 9 commits intodevelopfrom

copilot/implement-window-offset-functions

Commits on Dec 23, 2025

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Commits on Jan 2, 2026

Implement LEAD, LAG, FIRST_VALUE, and LAST_VALUE window functions

Copilot
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mathiasrw
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Add new test file test2409.js
mathiasrw
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Simplify window functions implementation - reduce from 192 to 82 lines

Copilot
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mathiasrw
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Use arrow function for window offset functions as requested

Copilot
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mathiasrw
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Simplify nested ternary and enable period-over-period test with subquery workaround

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mathiasrw
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Merge branch 'develop' into copilot/implement-window-offset-functions
mathiasrw
authored
Fix merge
mathiasrw
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Document known limitation: direct expressions with window functions not yet supported

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mathiasrw
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