# ClickHouse v26.3.30.9-lts — Release v26.3.30.9-lts

- Product: ClickHouse (https://whatsnew.fyi/product/clickhouse)
- Vendor: ClickHouse
- Date: 2026-09-04
- Version: v26.3.30.9-lts
- Original notes: https://github.com/ClickHouse/ClickHouse/releases/tag/v26.3.30.9-lts
- Permalink: https://whatsnew.fyi/product/clickhouse/releases/v26.3.30.9-lts
- Labels: Machine-generated from commit messages — the vendor published no release notes

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Fixed parallel_view_processing setting being ignored for materialized view fan-out.
- **fixed** — Fixed crash in predicate pushdown with a UNION subquery in a JOIN ON clause.
- **fixed** — Fixed wrong results from sumKahanIf and sumKahan over Nullable types when the aggregated batch does not start at row 0.
- **fixed** — Fixed memory leaks of abandoned nested states in the -ForEach and -Map aggregate combinators.
- **fixed** — Fixed validation of JSON/Object shared-data bucket count read from a stream.
- **fixed** — Fixed validation of skip_degree when reading a uniq aggregate state.
- **fixed** — Fixed overflow check when allocating a block of aggregate function states.