23.3 backport of #48299 Do not build skip indices if not used #276
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Do not build sets for skip indexes if they are not used
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Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Do not build set for the right side of IN clause with subquery when it is used only for analysis of skip indexes and they are disabled by setting (use_skip_indexes=0). Previously it might affect the performance of queries. (ClickHouse#48299 by @CurtizJ)