Re: correct the sizes of values and nulls arrays in pg_control_checkpoint

[Justin Pryzby]

On Thu, Dec 23, 2021 at 05:09:28PM +0530, Bharath Rupireddy wrote:
> Hi,
> 
> pg_control_checkpoint emits 18 columns whereas the values and nulls
> arrays are defined to be of size 19. Although it's not critical,
> attaching a tiny patch to fix this.

LGTM

It's helpful to check the history to find where the error was introduced:

4b0d28de06b28e57c540fca458e4853854fbeaf8
2ede45c3a49e484edfa143850d55eb32dba296de

> diff --git a/src/backend/utils/misc/pg_controldata.c
> b/src/backend/utils/misc/pg_controldata.c
> index 209a20a882..b1db9a8d07 100644
> --- a/src/backend/utils/misc/pg_controldata.c
> +++ b/src/backend/utils/misc/pg_controldata.c
> @@ -79,8 +79,8 @@ pg_control_system(PG_FUNCTION_ARGS)
>  Datum
>  pg_control_checkpoint(PG_FUNCTION_ARGS)
>  {
> -       Datum           values[19];
> -       bool            nulls[19];
> +       Datum           values[18];
> +       bool            nulls[18];
>         TupleDesc       tupdesc;
>         HeapTuple       htup;
>         ControlFileData *ControlFile;