Re: ECPG: WHENEVER statement with DO CONTINUE action

From: Michael Meskes <meskes(at)postgresql(dot)org>
To: vinayak <Pokale_Vinayak_q3(at)lab(dot)ntt(dot)co(dot)jp>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: ECPG: WHENEVER statement with DO CONTINUE action
Date: 2017-06-09 08:38:50
Message-ID: 1496997530.2092.53.camel@postgresql.org
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Hi,

> To develop the ECPG application more efficiently and improve
> portability,
> I would like to suggest one minor improvement "WHENEVER condition DO
> CONTINUE" support in ECPG.
> Oracle Pro*C supports WHENEVER statement with DO CONTINUE action.[1]
>
> EXEC SQL WHENEVER SQLERROR CONTINUE;
> is not same as
> EXEC SQL WHENEVER SQLERROR DO CONTINUE;
>
> The CONTINUE action instructs the client application to proceed to
> the next statement whereas DO CONTINUE action instructs the client
> application to emit a C continue statement and the flow of control
> return to the beginning of the enclosing loop.

This did actual escape me. Thanks for bringing it to our attention and
fixing this missing functionality.

> I have tried to implement it. Please check the attached patch.
> Please give me feedback.
> ...

Could you please add a "DO CONTINUE" case to one of the test cases? Or
add a new one? We would need a test case IMO.

Thanks

Michael
--
Michael Meskes
Michael at Fam-Meskes dot De, Michael at Meskes dot (De|Com|Net|Org)
Meskes at (Debian|Postgresql) dot Org
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