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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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You can change the value of a setting during your transaction as well, like this:

SET LOCAL work_mem = '16MB';

This results in the following output:

WARNING:  SET LOCAL can only be used in transaction blocksSET

In order to understand what the warning means, we look that setting up in the pg_settings catalog view:

postgres=# SELECT name, setting, reset_val, source                        FROM pg_settings WHERE source = ‘session’;   name   | setting | reset_val | source ----------+---------+-----------+--------- work_mem |  1024   | 1024      | session

Huh? What happened to your parameter setting? The SET LOCAL command takes effect only for the transaction in which it was executed, which was just the SET LOCAL command in our case. We need to execute it inside a ...

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Publisher Resources

ISBN: 9781788474924Supplemental Content