) Description. This is necessary so that the resources allocated for the subscription on 28. Oct 2, 2019 · Now, what I would like to do is find a way to disable the subscription automatically when it happens (ie. When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot (and any remaining table synchronization slots) as part of its operation. conf so it doesn't use a slot anymore and restart it. PUBLICATION insert_only. This can be used if the replication slot will be created later manually. ALTER SUBSCRIPTION can change most of the subscription properties that can be specified in CREATE SUBSCRIPTION. It is working fine. [ CASCADE | RESTRICT]; Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of the table that you want to drop after the DROP TABLE keywords. It is hard to say how you got into trouble, but probably like this: whenever you say CREATE SUBSCRIPTION , the standby connects to the primary and creates a logical replication slot Sep 24, 2019 · contrib_regression=# alter subscription test_sub set ( slot_name=none ); ALTER SUBSCRIPTION. Jul 11, 2022 · I want to drop the database, but kept getting that I have active replication slot. This is necessary so that the resources allocated for the subscription on A typical use case for logical replication is replicating a set of tables between two Amazon RDS for PostgreSQL DB instances. May 12, 2021 · few issues in alter subscription drop publication. 5, 9. Unfortunately, you have to go through this elaborate dance: alter subscription <sub1> disable; alter subscription <sub1> set (slot_name = none); drop subscription <sub1>; for each subscription, before you can drop the database. com> wrote: > On Fri, Feb 3, 2017 at 10:56 … pglogical Docs. However, to drop a table that is referenced Apr 20, 2017 · PostgreSQL Development, 24x7 Support, Training & Services In response to Re: DROP SUBSCRIPTION, query cancellations and slot handling at 2017-04-20 07:35:17 from Michael Paquier When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot (and any remaining table synchronization slots) as part of its operation. This is necessary so that the resources allocated for the subscription on Jun 27, 2024 · Description. Re: DROP SUBSCRIPTION hangs if sub is disabled in the same transaction at 2017-09-12 15:29:56 from Masahiko Sawada; Responses. 当删除与远程主机上的复制槽关联的订阅（正常状态）时， drop subscription 将连接到远程主机并尝试删除复制槽（以及任何剩余的表同步槽）作为其操作的一部分。这是必要的，以便释放为远程主机上的订阅分配的资源。 Description. Refuse to drop the table if any objects depend on it. The subscriber database behaves in the same way as any other PostgreSQL instance Drop and re-create subscription, the replication works. The subscriber database behaves in the same When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot as part of its operation. The subscription is added using CREATE SUBSCRIPTION and can be stopped/resumed at any time using the ALTER SUBSCRIPTION command and removed using DROP SUBSCRIPTION. pg_subscription. Amazon Aurora PostgreSQL-Compatible Edition version 2. 6 and later. It removes the catalog entries for the database and deletes the directory containing the data. Solution overview. But we disallow to do DROP SUBSCRIPTION in a. A publication is essentially a group of tables whose data changes are intended to be replicated through logical replication. DROP DATABASE mydb WITH (FORCE); The manual: FORCE. There is too When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot as part of its operation. 0 and later supports logical replication with PostgreSQL 10. The subscription represents a replication connection to the publisher. Jun 8, 2018 · Connect to the primary to drop the replication slot. Jul 9, 2021 · I'm working with an RDS instance running 12 that has an old subscription that I can't seem to drop. Rau@Chaos1. >> a transaction block. CASCADE. 25. This is necessary so that the resources allocated for the subscription on When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot as part of its operation. Unlike most system catalogs, pg_subscription is shared across all databases of a cluster: there is only one copy of pg_subscription per cluster, not one per database. The name (optionally schema-qualified) of the table for which the trigger is defined. Run "create subscription " However, the "drop subscription" part results in Jan 19, 2023 · DROP DATABASE doesn't terminate if prepared transactions, active logical replication slots, or subscriptions are present in the target database. Run "drop subscription " Truncate all tables. create_subscription to re-create the subscription, but the subscription status is down immediately. Once your test is successful, drop the subscription on the replica using DROP SUBSCRIPTION sub DROP TABLE removes tables from the database. To find a replication slot, run the following on the primary: SELECT * FROM pg_replication_slots; This allows you to see all the Jul 13, 2020 · If you can't do that, then you have to terminate the wal sender and then drop the slot before it has a chance to start up again. 14). no active connections. Ceci est nécessaire pour que les ressources allouées pour la souscription sur l'hôte distant soient supprimées. Share. This is necessary so that the resources allocated for the subscription on May 23, 2018 · If this fails, either because the remote host is not reachable or because the remote replication slot cannot be dropped or does not exist or never existed, the DROP SUBSCRIPTION command will fail. 53. Attached draft patch fixes >> this issue. Previously, DROP SUBSCRIPTION killed the logical replication workers immediately only if it was going to drop the replication slot Sep 12, 2017 · In response to. To proceed in this situation, disassociate the subscription from the replication slot by executing ALTER SUBSCRIPTION SET (slot_name = NONE). ALTER TABLE DROP COLUMN can be used to drop the only column of a table, leaving a zero-column table. - 2ndQuadrant/pglogical When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot as part of its operation. The catalog pg_subscription contains all existing logical replication subscriptions. Dropping all the publications present in the subscription using alter subscription drop publication would throw "subscription must contain at least one publication". 4 (Postgres), providing much faster replication than Slony, Bucardo or Londiste, as well as cross-version upgrades. subname, s. Jun 27, 2024 · Description. Presently, accesses to tables and indexes in both disk-block and individual-row terms are counted. So the approach is: Run a query to get all replicated tables, store this in an array. . CREATE PUBLICATION adds a new publication into the current database. Here’s the basic syntax of the DROP DATABASE statement: DROP DATABASE [ IF EXISTS] database_name. On 9/21/17 04:43, Masahiko Sawada wrote: >> Once we got this patch, DROP SUBSCRIPTION is not transactional either. Otherwise a warning is written and subscriptions are skipped, because non-superusers cannot read all subscription information from the pg_subscription catalog. May 2, 2023 · SELECT pg_drop_replication_slot('name of the slot'); If you need more than 10 replication slots, increase max_replication_slots on the primary and restart it. A typical deployment of Amazon RDS for PostgreSQL and Aurora PostgreSQL databases involves application writes being served by a master instance and reads being offloaded to AWS managed replicas. 2. subowner::regrole::text FROM pg_subscription s join pg_database d on d. When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot as part of its operation. Prev : Up Next: ALTER STATISTICS : When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot as part of its operation. A subscription can only be dropped by a superuser. Or you can change its recovery. DROP DATABASE db_name WITH (FORCE) You could check the manual for more. subdbid; Description. This is necessary so that the resources allocated for the subscription on the remote host are released. Since it is a race, you should arrange to submit the drop command on the same keystroke as the terminate command. However, to drop a table that is referenced 31. ALTER SUBSCRIPTION aaa DISABLE; ALTER SUBSCRIPTION aaa SET (slot_name = NONE); I tried to terminate the backend pid and drop it but at the end nothing worked. Jun 27, 2024 · DROP TABLE removes tables from the database. The node where a subscription is defined is referred to as the subscriber. These key words do not have any effect, since there are no dependencies on statistics Jul 12, 2022 · subdbid identifies the database in which the subscription is defined: select * from pg_database where oid = 16384; Or join it to pg_subscription: SELECT d. DROP DATABASE drops a database. See Also CREATE SUBSCRIPTION, DROP SUBSCRIPTION, CREATE PUBLICATION, ALTER PUBLICATION. 6) and above. datname, s. drop_subscription to delete the subscription from slave instance. A subscription represents a replication connection to the publisher. I tried to drop logical replication subscription. pg_stat_slru. Jun 27, 2024 · Otherwise a warning is written and subscriptions are skipped, because non-superusers cannot read all subscription information from the pg_subscription catalog. It cannot be executed while you are connected to the target database. e. Such subscriptions must also have both enabled and create_slot set to false. DROP TABLE always removes any indexes, rules, triggers, and constraints that exist for the target table. The publication name must be distinct from the name of any existing publication in the current database. Replication Slot Management. It seems that the first DROP should succeed in the above case. The name (optionally schema-qualified) of the table to drop. I tried to disable it and drop it. FORCE - Attempt to terminate all existing connections to the target database. As such this command does not only add definitions in the local catalogs but also creates a To drop a table from the database, you use the DROP TABLE statement as follows: DROP TABLE [ IF EXISTS] table_name. The total number of rows in each table, and information about vacuum and Apr 20, 2017 · PostgreSQL Development, 24x7 Support, Training & Services In response to Re: DROP SUBSCRIPTION, query cancellations and slot handling at 2017-04-20 12:41:25 from Michael Paquier Logical Replication extension for PostgreSQL 15, 14, 13, 12, 11, 10, 9. 1。 如果预订与复制插槽关联，则无法在事务块内部执行DROP SUBSCRIPTION。 Feb 7, 2017 · >> stops the apply worker after DROP SUBSCRIPTION is committed rather >> than DropSubscription does. 28. Note: This feature has been added as part of the current development version and is planned to be released as part of PostgreSQL 13. Feb 21, 2022 · Axel Rau <Axel. >> if dropping a replication slot or if the subscription got disabled in. To execute this command the user must be the owner of the subscription. Re: DROP SUBSCRIPTION hangs if sub is disabled in the same transaction at 2017-09-13 04:07:31 from Masahiko Sawada Description. The subscription name must be distinct from the name of any existing subscription in the database. DE> writes: > This was the error message from an ansible script. Description. 1. You must own the subscription to use ALTER SUBSCRIPTION. … Sep 12, 2017 · PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services In response to Re: DROP SUBSCRIPTION hangs if sub is disabled in the same transaction at 2017-09-11 18:26:15 from Peter Eisentraut Jun 16, 2015 · Use pg_drop_replication_slot: select pg_drop_replication_slot('bottledwater'); See the docs and this blog. As such this command does not only add definitions in the local catalogs but also creates a DROP TABLE removes tables from the database. This is the default. ALTER SUBSCRIPTION is a PostgreSQL extension. com>: > > > Why the backslashes, instead of: > > psql -c … Sep 18, 2017 · DROP SUBSCRIPTION, the latter will hang because workers will still be running, not having seen the DISABLE committed, and DROP SUBSCRIPTION will wait until the workers have vacated the replication origin slots. Attempt to terminate all existing connections to the target database. For more information about logical replication see Chapter 31. However, to drop a table that is referenced Description. CREATE SUBSCRIPTION adds a new logical-replication subscription. Create a subscription to a remote server that replicates tables in the insert_only publication and does not start replicating until enabled at a later time. I assumed, ansible did the quoting. 4 and later. The default behavior is to use the name of the subscription for the slot name. We use the following terms to describe data streams between nodes, deliberately reused from the earlier Slony technology: Feb 7, 2017 · orphan subscription can not be removed later. RDS for PostgreSQL supports logical replication with PostgreSQL 10. 2021-07-09 16:08:07 UTC::@:[1637]:LOG: logical replication apply worker for subscription "metro" has started 2021-07-09 16:08:07 UTC::@:[1637]:ERROR: could not connect to the Sep 22, 2017 · pgsql-hackers. CREATE SUBSCRIPTION adds a new subscription for the current database. The replication slot must be inactive, i. fujii@gmail. Refuse to drop the trigger if any objects depend on it. ) The other forms are PostgreSQL extensions of the SQL standard. but I run pglogical. oid = s. DROP TABLE removes tables from the database. I think the logical replication should not stop and the corresponding replication slot and replication origin should not be removed until the transaction commits. The pglogical extension provides logical streaming replication for PostgreSQL, using a publish/subscribe module. It doesn't terminate if prepared transactions, active logical replication slots or subscriptions are present in the target database. I think the justification for this monstrosity is they want to make it really hard to drop a When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot as part of its operation. DROP SUBSCRIPTION removes a subscription from the database cluster. You could just use this command to drop a Database forcefully, thus disconnecting each user/app connected to it. 14 ). The solution for this I came up with is that the launcher process stops the apply worker after DROP SUBSCRIPTION is committed rather Jun 27, 2024 · ALTER SUBSCRIPTION is a PostgreSQL extension. On the primary, you can query the pg_replication_slots table to see the replication slot created by the subscription. 24. 02. To empty a table of rows without destroying the table, use DELETE or TRUNCATE. contrib_regression=# drop subscription test_sub; -- succeeds DROP SUBSCRIPTION. The subscription name must be distinct from the name of any existing subscription in the current database. Automatically drop objects that depend on the table (such as views), and in turn all objects that depend on those objects (see Section 5. PostgreSQL 's cumulative statistics system supports collection and reporting of information about server activity. The logs show this, repeating every 5 seconds or so. Note that the publication was never refreshed. 54. This is an extension of SQL, which disallows zero-column tables. CONNECTION 'host=192. Jun 27, 2024 · DROP STATISTICS removes statistics object(s) from the database. synchronous_commit The DROP DATABASE statement deletes a database from a PostgreSQL server. Jan 30, 2012 · PostgreSQL 13 added:. [ WITH ( FORCE )] Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the database name that you want to remove after the DROP DATABASE keywords. Feb 21, 2022 · > Am 21. When slot_name is set to NONE, there will be no replication slot associated with the subscription. To alter the owner, you must also be a direct or indirect member of the new owning role. After that I tried to run pglogical. 之后，DROP SUBSCRIPTION将不再尝试在远程主机上执行任何操作。请注意，如果远程复制插槽仍然存在，则应手动删除它；否则它将 continue 保留 WAL，并最终可能导致磁盘装满。另请参见Section 31. Cleanup. select pg_drop_replication_slot('rep_slot'); ERROR: replication slot "rep_slot" is active for PID 162564. Jul 29, 2020 · Aurora PostgreSQL supports the publication and subscription framework from engine version 2. WITH (enabled = false); A subscription is the downstream side of logical replication. Since you failed to drop the replication slot, it comes as no surprise that creating a new subscription with the same name (and hence replication slot) fails. Or at least some hint should be given how to fix this. CREATE SUBSCRIPTION mysub. ) 之后，drop subscription 将不再尝试对远程主机执行任何操作。请注意，如果远程复制槽仍然存在， 则应手动删除该插槽；否则将继续保留wal，最终可能导致磁盘空间不足。 另见第 31. This should happen on exit of worker, but worker will not exit until transaction commit because he doesn't see that the sub was disabled. Prev : Up Next: ALTER STATISTICS : Lors de la suppression d'une souscription associée à un slot de réplication sur l'hôte distant (l'état normal), DROP SUBSCRIPTION se connectera à l'hôte distant et tentera de supprimer le slot de réplication. Alter subscription drop publication does not support copy_data option, that needs to be removed from tab completion. A subscription is the downstream side of logical replication. Only the table owner, the schema owner, and superuser can drop a table. Hence, in addition to adding definitions in the local catalogs, this command normally When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot (and any remaining table synchronization slots) as part of its operation. This is necessary so that the resources allocated for the subscription on Aug 10, 2021 · 3 Answers. (Connect to postgres or any other database to issue this command. 2 (compatible with 10. I am using pglogical in postgresql11 to replica data from master cluster to a slave cluster. Primary: truncate table rep_test; truncate table rep_test2; Replicate: drop subscription rep_test_sub; CREATE SUBSCRIPTION rep_test_sub CONNECTION 'host=XXX port=5432 dbname=rocket user=XXX password=XXX' PUBLICATION rep_test_pub WITH (copy_data = false); Primary: Jun 10, 2022 · For that, I essentially want to drop and re-create the subscription. The user that creates a subscription becomes the owner of the subscription. Second, use the IF EXISTS option to remove the Description. A subscriber node may have multiple subscriptions if CREATE SUBSCRIPTION adds a new subscription for the current database. (You can use ALTER SUBSCRIPTION to unset the slot. Sorted by: 5. >> > > I don't think we can allow the slot drop to be postponed. Sep 4, 2017 · alter subscription s set (slot_name = none); drop subscription s; end; It hangs in replorigin_drop because we wait until ReplicationState is released. 168. As such this command does not only add definitions in the local catalogs but also creates a replication Description. However, to drop a table that is referenced 2 days ago · After creating the subscription, query the native_test table to verify that the data has appeared in the replica instance. 6, 9. 2022 um 18:34 schrieb Ron <ronljohnsonjr@gmail. And the apply worker drops replication >> slot and replication origin before exits. It can only be executed by the database owner. Automatically drop objects that depend on the trigger, and in turn all objects that depend on those objects (see Section 5. Only the statistics object's owner, the schema owner, or a superuser can drop a statistics object. The subscriber database behaves in the same way as any other PostgreSQL instance and can be used as a publisher for other databases by defining its own publications. Statistics Functions. Feb 8, 2024 · Otherwise a warning is written and subscriptions are skipped, because non-superusers cannot read all subscription information from the pg_subscription catalog. In order to be able to do that, the tables need to be empty. ALTER SUBSCRIPTION sub2 DISABLE When dropping a subscription that is associated with a replication slot on the remote host (the normal state), DROP SUBSCRIPTION will connect to the remote host and try to drop the replication slot (and any remaining table synchronization slots) as part of its operation. RESTRICT. A subscription defines the connection to another database and set of publications (one or more) to which it wants to subscribe. However, to drop a table that is referenced The name of the trigger to remove. 1 节。 如果订阅与复制槽相关联，那么不能在事务块内部执行drop subscription。 May 23, 2022 · 1. It is based on technology developed as part of the BDR Project. So if there's a streaming replica using the slot you must stop the streaming replica. #. The new owner has to be a superuser. This is necessary so that the resources allocated for the subscription on Feb 3, 2017 · On Sat, Feb 4, 2017 at 12:49 AM, Fujii Masao <masao. Attached patch fixes this by stopping workers before RO Jun 10, 2022 · > non-superusers to re-create a subscription. > > However, the "drop subscription" part results in this error: > > ERROR: DROP SUBSCRIPTION cannot be executed from a function > CONTEXT: SQL statement "drop subscription if exists my_replication" > > I first thought that the initial SELECT to fetch all replicated tables, Jul 3, 2013 · Update in Postgresql 13. execute the following command), then the ERROR will not appear in the logs because the worker will not exist and will not try to connect to an offline master. 50 port=5432 user=foo dbname=foodb'. Also, the ability to specify more than one manipulation in a single ALTER TABLE command is an extension. DROP SUBSCRIPTION cannot be executed inside a transaction block if the subscription is associated with a replication slot. nj fb po pl jd lg ww px rt vg