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Revert "Enable skip index usage during read by default"#88638

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rschu1ze merged 5 commits intomasterfrom
revert-skip-idx-in-read-enablement
Oct 22, 2025
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Revert "Enable skip index usage during read by default"#88638
rschu1ze merged 5 commits intomasterfrom
revert-skip-idx-in-read-enablement

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@rschu1ze rschu1ze commented Oct 16, 2025

#87368 enabled setting use_skip_indexes_on_data_read. This led to the discovery of certain usability issues with EXPLAIN PLAN (#88467). These are addressed by #88504, however more functional problems popped up:

These failures existed already in the original PR but were masked by setting use_skip_indexes_on_data_read = 0 in affected tests.

This PR rolls back the setting enablement #87368 until these problems are fixed properly.

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clickhouse-gh bot commented Oct 16, 2025

Workflow [PR], commit [7b4a68f]

Summary:

job_name test_name status info comment
Stateless tests (amd_binary, ParallelReplicas, s3 storage, parallel) failure
03578_parallel_replicas_minicrawl FAIL cidb, flaky
Integration tests (amd_asan, old analyzer, 4/6) failure
test_log_query_probability/test.py::test_log_quries_probability_two FAIL cidb

@clickhouse-gh clickhouse-gh bot added the pr-not-for-changelog This PR should not be mentioned in the changelog label Oct 16, 2025
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Stateless tests (amd_binary, ParallelReplicas, s3 storage, parallel)

@rschu1ze rschu1ze added this pull request to the merge queue Oct 22, 2025
Merged via the queue into master with commit 5fb6200 Oct 22, 2025
120 of 123 checks passed
@rschu1ze rschu1ze deleted the revert-skip-idx-in-read-enablement branch October 22, 2025 11:31
@robot-ch-test-poll3 robot-ch-test-poll3 added the pr-synced-to-cloud The PR is synced to the cloud repo label Oct 22, 2025
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4 participants