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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2019-01-25 21:14:31 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2019-01-25 21:14:31 -0500 |
| commit | 741ee48900c5bbf970f23d32e49020408e417bdc (patch) | |
| tree | 068b709ffdc7c79b6f0d842c0a961fcd2209ed04 /src | |
| parent | fbf5395cb1ea8d1e53d830b90209b150b273692b (diff) | |
| download | postgresql-741ee48900c5bbf970f23d32e49020408e417bdc.tar.gz postgresql-741ee48900c5bbf970f23d32e49020408e417bdc.zip | |
Allow UNLISTEN in hot-standby mode.
Since LISTEN is (still) disallowed, UNLISTEN must be a no-op in a
hot-standby session, and so there's no harm in allowing it. This
change allows client code to not worry about whether it's connected
to a primary or standby server when performing session-state-reset
type activities. (Note that DISCARD ALL, which includes UNLISTEN,
was already allowed, making it inconsistent to reject UNLISTEN.)
Per discussion, back-patch to all supported versions.
Shay Rojansky, reviewed by Mi Tar
Discussion: https://postgr.es/m/CADT4RqCf2gA_TJtPAjnGzkC3ZiexfBZiLmA-mV66e4UyuVv8bA@mail.gmail.com
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/tcop/utility.c | 2 | ||||
| -rw-r--r-- | src/test/regress/expected/hs_standby_allowed.out | 3 | ||||
| -rw-r--r-- | src/test/regress/expected/hs_standby_disallowed.out | 4 | ||||
| -rw-r--r-- | src/test/regress/sql/hs_standby_allowed.sql | 4 | ||||
| -rw-r--r-- | src/test/regress/sql/hs_standby_disallowed.sql | 2 |
5 files changed, 8 insertions, 7 deletions
diff --git a/src/backend/tcop/utility.c b/src/backend/tcop/utility.c index c41b3506605..1bafd4e84d2 100644 --- a/src/backend/tcop/utility.c +++ b/src/backend/tcop/utility.c @@ -619,7 +619,7 @@ standard_ProcessUtility(Node *parsetree, { UnlistenStmt *stmt = (UnlistenStmt *) parsetree; - PreventCommandDuringRecovery("UNLISTEN"); + /* we allow UNLISTEN during recovery, as it's a noop */ CheckRestrictedOperation("UNLISTEN"); if (stmt->conditionname) Async_Unlisten(stmt->conditionname); diff --git a/src/test/regress/expected/hs_standby_allowed.out b/src/test/regress/expected/hs_standby_allowed.out index c26c9822f63..b2efb4195d9 100644 --- a/src/test/regress/expected/hs_standby_allowed.out +++ b/src/test/regress/expected/hs_standby_allowed.out @@ -208,6 +208,9 @@ LOCK hs1 IN ACCESS SHARE MODE; LOCK hs1 IN ROW SHARE MODE; LOCK hs1 IN ROW EXCLUSIVE MODE; COMMIT; +-- UNLISTEN +UNLISTEN a; +UNLISTEN *; -- LOAD -- should work, easier if there is no test for that... -- ALLOWED COMMANDS diff --git a/src/test/regress/expected/hs_standby_disallowed.out b/src/test/regress/expected/hs_standby_disallowed.out index bc117413ffd..dff0953e9a6 100644 --- a/src/test/regress/expected/hs_standby_disallowed.out +++ b/src/test/regress/expected/hs_standby_disallowed.out @@ -118,10 +118,6 @@ listen a; ERROR: cannot execute LISTEN during recovery notify a; ERROR: cannot execute NOTIFY during recovery -unlisten a; -ERROR: cannot execute UNLISTEN during recovery -unlisten *; -ERROR: cannot execute UNLISTEN during recovery -- disallowed commands ANALYZE hs1; ERROR: cannot execute ANALYZE during recovery diff --git a/src/test/regress/sql/hs_standby_allowed.sql b/src/test/regress/sql/hs_standby_allowed.sql index 7fc22148cbc..f15a1a49092 100644 --- a/src/test/regress/sql/hs_standby_allowed.sql +++ b/src/test/regress/sql/hs_standby_allowed.sql @@ -110,6 +110,10 @@ LOCK hs1 IN ROW SHARE MODE; LOCK hs1 IN ROW EXCLUSIVE MODE; COMMIT; +-- UNLISTEN +UNLISTEN a; +UNLISTEN *; + -- LOAD -- should work, easier if there is no test for that... diff --git a/src/test/regress/sql/hs_standby_disallowed.sql b/src/test/regress/sql/hs_standby_disallowed.sql index 21bbf526b74..a470600eec8 100644 --- a/src/test/regress/sql/hs_standby_disallowed.sql +++ b/src/test/regress/sql/hs_standby_disallowed.sql @@ -88,8 +88,6 @@ COMMIT; -- Listen listen a; notify a; -unlisten a; -unlisten *; -- disallowed commands |