Rooted $or queries run through the SubplanStage path. The SubplanStage may use a cached plan for a branch of the $or without making use of the CachedPlanStage trial period logic. This means that rooted $or queries could use badly performing plans without plan cache entry eviction and replanning kicking in.
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SERVER-13732 Predicates in top-level implicit AND query not considered when generating index access plan for contained OR
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- Closed
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SERVER-15225 CachedPlanStage should execute for trial period and re-plan if query performs poorly
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- Closed
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- related to
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- Closed
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