See documentation, chapter Viii.E.2.2.2
2011/11/11, Chris Travers <chris.travers@xxxxxxxxx>:
> Hi;
>
> I have found recently that tables in certain contexts seem to have a
> name pseudocolumn. I was wondering if there is any documentation as
> to what this is and what it signifies.
>
> postgres=# CREATE table TEST2 (a text, b text);
> CREATE TABLE
> postgres=# INSERT INTO test2 values ('aaaa', 'bbbb');
> INSERT 0 1
> postgres=# select t.name FROM test2 t;
> name
> -------------
> (aaaa,bbbb)
> (1 row)
>
> However:
>
>
> postgres=# select name FROM test2 t;
> ERROR: column "name" does not exist
> LINE 1: select name FROM test2 t;
>
> This isn't making any sense to me. Are there certain circumstances
> where a tuple is cast to something like varchar(63)? Does this pose
> pitfals for any columns named 'name' in other contexts?
>
> Best Wishes,
> Chris Travers
>
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pasman
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