Add Temporarily Disable Triggers as a postgres til.

README.md

@@ -61,6 +61,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Generate Series Of Numbers](postgres/generate-series-of-numbers.md)
 - [Limit Execution Time Of Statements](postgres/limit-execution-time-of-statements.md)
 - [String Contains Another String](postgres/string-contains-another-string.md)
+- [Temporarily Disable Triggers](postgres/temporarily-disable-triggers.md)
 - [Timestamp Functions](postgres/timestamp-functions.md)
 - [Toggling The Pager In PSQL](postgres/toggling-the-pager-in-psql.md)
 - [Turning Timing On](postgres/turning-timing-on.md)

postgres/temporarily-disable-triggers.md

@@ -0,0 +1,25 @@
+# Temporarily Disable Triggers
+
+In general, you are always going to want your triggers to fire. That's why
+they are there. Though special circumstances may arise where you need to
+temporarily disable them. Use
+
+```sql
+> set session_replication_role = 'replica';
+SET
+```
+
+By changing the
+[replication role](http://www.postgresql.org/docs/9.4/static/runtime-config-client.html#GUC-SESSION-REPLICATION-ROLE)
+from `origin` to
+`replica` you are essentially disabling all non-replica triggers across the
+database (for that session). When you are done, you can simply set the
+replication role back so that normal trigger behavior can resume
+
+```sql
+> set session_replication_role = 'origin';
+SET
+```
+
+A more direct and fine-grained approach to disabling triggers is to use an
+`alter table` command that targets a specific trigger.