Re: pg_prepared_statements missing column

Hi,

On Sat, Nov 12, 2022 at 11:37:34PM -0800, Peter Gigowski wrote:
>
> My buddy and I were running through the 15.1 docs today and found the
> pg_prepared_statements view doesn't include the return_type column like it
> says it should.
>
> Here is the printout from /d pg_prepared_statements
> View "pg_catalog.pg_prepared_statements" Column | Type | Collation |
> Nullable | Default
> -----------------+--------------------------+-----------+----------+---------
> name | text | | | statement | text | | | prepare_time | timestamp with time
> zone | | | parameter_types | regtype[] | | | from_sql | boolean | | |
> generic_plans | bigint | | | custom_plans | bigint | | |
>
> My version:
> PostgreSQL 15.1 (Debian 15.1-1.pgdg110+1) on x86_64-pc-linux-gnu, compiled
> by gcc (Debian 10.2.1-6) 10.2.1 20210110, 64-bit
>
> Link to docs:
> https://www.postgresql.org/docs/15/view-pg-prepared-statements.html
>
> I'm not sure exactly what to make of it, but I wanted to submit a ticket.

Indeed!  It's a documentation bug.  This was apparently an oversight
when packpatching 5766443695d (Bruce in Cc), as it introduced the result_types
column in the documentation in pg15 while the feature itself is only introduced
in pg16 (84ad713cf85).