Fix prefetch of substreams with prefixes in Wide parts#78205
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Can we have a specific test for it? |
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I couldn't create a stable reproducer, it depends on which merge tree reader will start prefixes deserialization first (they do it concurrently). |
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@Avogar : Maybe it helps to run flaky check in CI on Rest all LGTM |
Co-authored-by: Smita Kulkarni <Smita.Kulkarni@clickhouse.com>
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Cherry pick #78205 to 25.3: Fix prefetch of substreams with prefixes in Wide parts
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Backport #78205 to 25.3: Fix prefetch of substreams with prefixes in Wide parts
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Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Fix prefetch of substreams with prefixes in Wide parts
Was intoroduced in #77640
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