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PostgreSQL 10 Administration Cookbook - Fourth Edition
book

PostgreSQL 10 Administration Cookbook - Fourth Edition

by Simon Riggs, Gianni Ciolli
May 2018
Intermediate to advanced content levelIntermediate to advanced
576 pages
30h 25m
English
Packt Publishing
Content preview from PostgreSQL 10 Administration Cookbook - Fourth Edition

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If you're not sure what the prepared transaction actually did, you can go and look, though that is time-consuming. The pg_locks view shows locks that are held by prepared transactions. You can get a full report of what is being locked by using the following query:

postgres=# SELECT l.locktype, x.database, l.relation, l.page, l.tuple,l.classid, l.objid, l.objsubid, l.mode, x.transaction, x.gid, x.prepared, x.ownerFROM pg_locks l JOIN pg_prepared_xacts x ON l.virtualtransaction = ‘-1/’ || x.transaction::text;

The documents mention that you can join pg_locks to pg_prepared_xacts, but they don't mention that if you join directly on the transaction ID, all it tells you is that there is a transaction lock, unless there are some row-level ...

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Publisher Resources

ISBN: 9781788474924Supplemental Content