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Till now, the reason for replication slot invalidation is not tracked directly in pg_replication_slots. A recent commit 007693f2a3 added 'conflict_reason' to show the reasons for slot conflict/invalidation, but only for logical slots. This commit adds a new column 'invalidation_reason' to show invalidation reasons for both physical and logical slots. And, this commit also turns 'conflict_reason' text column to 'conflicting' boolean column (effectively reverting commit 007693f2a3). The 'conflicting' column is true for invalidation reasons 'rows_removed' and 'wal_level_insufficient' because those make the slot conflict with recovery. When 'conflicting' is true, one can now look at the new 'invalidation_reason' column for the reason for the logical slot's conflict with recovery. The new 'invalidation_reason' column will also be useful to track other invalidation reasons in the future commit. Author: Bharath Rupireddy Reviewed-by: Bertrand Drouvot, Amit Kapila, Shveta Malik Discussion: https://www.postgresql.org/message-id/ZfR7HuzFEswakt/a%40ip-10-97-1-34.eu-west-3.compute.internal Discussion: https://www.postgresql.org/message-id/CALj2ACW4aUe-_uFQOjdWCEN-xXoLGhmvRFnL8SNw_TZ5nJe+aw@mail.gmail.com