Within a trigger is there a way to tell if an update or insert triggering the trigger came from a trigger or not?

I'm trying to prevent a trigger from executing again due to an update or insert within the current trigger or another trigger that executes upon update or insert. So I want to know what the source of the update is so I can prevent recursive triggering.

Unless I missed it, I looked here and didn't read anything about this: https://www.postgresql.org/docs/9.2/static/plpgsql-trigger.html

I don't think this would work because I am thinking it will always return the trigger I am currently in, not the source (trigger or not) of the udpate or insert:

TG_NAME

"Data type name; variable that contains the name of the trigger actually fired"

PostgreSQL 9.3.5

EDIT: Currently I am doing a lot of old.col_nm <> new.col_nm etc. to try and determine via the values that change if it was one of my triggers or not. It would be nice if I could just say "if an update or insert came from a trigger return new;" and skip the bulk of the trigger.

In PostgreSQL 9.3.5, I'm trying to prevent a trigger from executing again due to an update or insert within the current trigger or another trigger that executes upon update or insert. So I want to know what the source of the update is so I can prevent recursive triggering.

Unless I missed it, I looked here and didn't read anything about this in the manual: 
https://www.postgresql.org/docs/9.3/static/plpgsql-trigger.html

I don't think this would work because I am thinking it will always return the trigger I am currently in, not the source (trigger or not) of the udpate or insert:

TG_NAME

Data type name; variable that contains the name of the trigger actually fired

Currently I am doing a lot of old.col_nm <> new.col_nm etc. to try and determine via the values that change if it was one of my triggers or not. It would be nice if I could just say "if an update or insert came from a trigger return new;" and skip the bulk of the trigger.

Within a trigger is there a way to tell if an update or insert triggering the trigger came from a trigger or not?

I'm trying to prevent a trigger from executing again due to an update or insert within the current trigger or another trigger that executes upon update or insert. So I want to know what the source of the update is so I can prevent recursive triggering.

Unless I missed it, I looked here and didn't read anything about this: https://www.postgresql.org/docs/9.2/static/plpgsql-trigger.html

I don't think this would work because I am thinking it will always return the trigger I am currently in, not the source (trigger or not) of the udpate or insert:

TG_NAME

"Data type name; variable that contains the name of the trigger actually fired"

PostgreSQL 9.3.5

Within a trigger is there a way to tell if an update or insert triggering the trigger came from a trigger or not?

I'm trying to prevent a trigger from executing again due to an update or insert within the current trigger or another trigger that executes upon update or insert. So I want to know what the source of the update is so I can prevent recursive triggering.

Unless I missed it, I looked here and didn't read anything about this: https://www.postgresql.org/docs/9.2/static/plpgsql-trigger.html

I don't think this would work because I am thinking it will always return the trigger I am currently in, not the source (trigger or not) of the udpate or insert:

TG_NAME

"Data type name; variable that contains the name of the trigger actually fired"

PostgreSQL 9.3.5

EDIT: Currently I am doing a lot of old.col_nm <> new.col_nm etc. to try and determine via the values that change if it was one of my triggers or not. It would be nice if I could just say "if an update or insert came from a trigger return new;" and skip the bulk of the trigger.