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[docs] Explain Lance array predicate pushdown and scalar index verification - #4184

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@Gabriel39 Gabriel39 commented Sep 30, 2026 •

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Document the Doris 4.1 array-label predicate pushdown update in the English and Chinese Lance Catalog pages. Explain supported array_contains forms, NULL and ordered-subsequence restrictions, safe boolean combinations, single-index scope, uncovered fragments, and the EXPLAIN/Profile evidence needed to distinguish pushdown from actual index use.

Companion implementation: apache/doris#68687 (branch-4.1), based on lance-format/lance-c#93; keep this documentation draft until that implementation is ready.

Validation: JSON front matter and modified MDX sections compile; changed-scope link checks report no errors; English/Chinese content and examples are aligned. The i18n checker reports a missing current mirror: this is intentional because the repository contains Lance Catalog documentation only in version-4.x, in both languages. No paths, existing anchors, navigation, or frontend code changed. A full site build was not run.

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