Add _part_granule_offset column#82341
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alexey-milovidov merged 2 commits intoClickHouse:masterfrom Jun 26, 2025
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Workflow [PR], commit [d0157788] Summary: ✅ |
KochetovNicolai
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Jun 21, 2025
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This was referenced Jun 24, 2025
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Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Support
_part_granule_offsetvirtual column in MergeTree-family tables. This column indicates the zero-based index of the granule/mark each row belongs to within its data part. This addresses #79572.This PR also relaxes the restriction that
_part_offsetand_block_offsetmust be read during the first reading step. It further includes some preparatory refactoring extracted from #81526 to simplify the review of that PR.I'm currently using
_part_granule_offsetto analyze whether the query condition cache fully records all relevant granules.Documentation entry for user-facing changes