Re: Is there a way to create a functional index that tables tableoid column as an arg?

[Ryan Murphy <ryanfmurphy@xxxxxxxxx>]

Hi David!  Thanks for the reply.

> tableoid might be an exception to
> this, but it does not really seem like a useful column to index,
> giving it would be indexing the same value for each record in the
> table.

Unless you're using inheritance - then tableoid may vary.  That's the case I'm interested in.

 

-- get all animals that are persons
select ... from animal where tableoid in (select
get_inherited_tables('person'::regclass);

-- get all animals that are not persons
select ... from animal where tableoid not in (select
get_inherited_tables('person'::regclass);

That's a great idea.  I'll try it!

 

Just be careful around search_paths and your use of regclass. In this
case, if "animal" was not in the first schema in search_path, but
someone created another table called "person" that was in the first
schema listed in search_path, then the query would not do what you
want. You might want to consider prefixing the input parameter into
get_inherited_tables with the schema name too.

Good point.

Thanks again!

Ryan