Re: Cleanup - Removal of unused function parameter from CopyReadBinaryAttribute

From: Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>
To: vignesh C <vignesh21(at)gmail(dot)com>
Cc: Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Cleanup - Removal of unused function parameter from CopyReadBinaryAttribute
Date: 2020-06-19 05:29:38
Message-ID: CALj2ACW+bVF8oP1xyoPFx3Fp8Rk=y533D6Nk24E+dLoKU5egWA@mail.gmail.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

> > > I don't see any problem in removing this extra parameter.
> > >
> > > However another thought, can it be used to report a bit meaningful
> > > error for field size < 0 check?
> >
> > column_no was used for that purpose in the past, but commit 0e319c7ad7
> > changed that. If we want to use column_no in the log message again,
> > it's better to check why commit 0e319c7ad7 got rid of column_no from
> > the message.
>
> I noticed that displaying of column information is present and it is
> done in a different way. Basically cstate->cur_attname is set with the
> column name before calling CopyReadBinaryAttribute function. If there
> is any error in CopyReadBinaryAttribute function,
> CopyFromErrorCallback will be called. CopyFromErrorCallback function
> takes care of displaying the column name by using cstate->cur_attname.
> I tried simulating this and it displays the column name neatly in the
> error message.:
> postgres=# copy t1 from '/home/db/copydata/t1_copy.bin' with (format 'binary');
> ERROR: invalid field size
> CONTEXT: COPY t1, line 1, column c1
> I feel we can safely remove the parameter as in the patch.
>

thanks for this information.

+1 for this patch.

With Regards,
Bharath Rupireddy.
EnterpriseDB: http://www.enterprisedb.com

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Kyotaro Horiguchi 2020-06-19 05:35:11 Re: min_safe_lsn column in pg_replication_slots view
Previous Message David Rowley 2020-06-19 05:27:13 Re: Missing HashAgg EXPLAIN ANALYZE details for parallel plans