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Add 'active_in' column to pg_replication_slots.

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Right now it is visible whether a replication slot is active in any
session, but not in which.  Adding the active_in column, containing the
pid of the backend having acquired the slot, makes it much easier to
associate pg_replication_slots entries with the corresponding
pg_stat_replication/pg_stat_activity row.

This should have been done from the start, but I (Andres) dropped the
ball there somehow.

Author: Craig Ringer, revised by me Discussion:
CAMsr+YFKgZca5_7_ouaMWxA5PneJC9LNViPzpDHusaPhU9pA7g@mail.gmail.com
This commit is contained in:
Andres Freund
2015-04-21 11:51:06 +02:00
parent 528c2e44ab
commit d811c037ce
9 changed files with 47 additions and 28 deletions
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4
contrib/test_decoding/expected/ddl.out
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@ -603,7 +603,7 @@ SELECT pg_drop_replication_slot('regression_slot');
/* check that the slot is gone */
SELECT * FROM pg_replication_slots;
slot_name | plugin | slot_type | datoid | database | active | xmin | catalog_xmin | restart_lsn
-----------+--------+-----------+--------+----------+--------+------+--------------+-------------
slot_name | plugin | slot_type | datoid | database | active | active_in | xmin | catalog_xmin | restart_lsn
-----------+--------+-----------+--------+----------+--------+-----------+------+--------------+-------------
(0 rows)