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known issues: the count push-down is wrong for other chain shapes (upstream #9290), 26.10.1 affected (#209) - #210
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…stream ArcadeData#9290), with strict xfail tripwires and the WITH workaround (#209) Reproduced through the bindings on the official 26.10.1 wheel: 6, 12, 12, 10, and 18 where 2, 4, 4, 2, and 4 is right, with COUNT ANTI-JOIN CHAIN in the plan. The two-hop shape with a label on every node (LSQB Q9) is right. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Ubz3m6QXHESerCkehC1qgi
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Fixes #209.
Upstream ArcadeData#9290 (filed today from the verification of PR ArcadeData#9288): the COUNT ANTI-JOIN CHAIN push-down counts more than the row pipeline for chains with more than two hops of one type, an inequality between other nodes, no inequality, a negated pattern away from the first node, or an unlabelled node with the first node as the target. Reproduced through the bindings on the official 26.10.1 wheel: 6, 12, 12, 10, and 18 where 2, 4, 4, 2, and 4 is right.
Adds a known-issues entry with the
WITHworkaround, five strictxfailtripwires (each first checks the plan still uses the push-down, so a changed plan fails the suite instead of passing the tripwire), a test of the workaround for each shape, and a control for the two-hop shape the push-down is written for (the LSQB Q9 shape, which is right).Checked on the official 26.10.1 wheel:
tests/test_count_pushdown_known_issues.pygives 21 passed and 14 xfailed (the 9 of ArcadeData#9277, ArcadeData#9278, and ArcadeData#9281 plus the 5 new ones). This has to land before the 26.10.1 release so the release docs carry the entry.🤖 Generated with Claude Code
https://claude.ai/code/session_01Ubz3m6QXHESerCkehC1qgi