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Fix catcache invalidation of a list entry that's being built
If a new catalog tuple is inserted that belongs to a catcache listentry, and cache invalidation happens while the list entry is beingbuilt, the list entry might miss the newly inserted tuple.To fix, change the way we detect concurrent invalidations while acatcache entry is being built. Keep a stack of entries that are beingbuilt, and apply cache invalidation to those entries in addition tothe real catcache entries. This is similar to the in-progress list inrelcache.c.Back-patch to all supported versions.Reviewed-by: Noah MischDiscussion:https://www.postgresql.org/message-id/2234dc98-06fe-42ed-b5db-ac17384dc880@iki.fi1 parente027ee9 commit96e61b2
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