RE: Two issues with version checks in CREATE SUBSCRIPTION

Dear Fujii-san,

Thanks for the patch! They basically look good to me.

> First, in subscriptioncmds.c this check rejects enabling retain_dead_tuples
> when the publisher is running an older version. However, the comparison uses
> 19000 as v19 value. Since server versions are encoded as 190000 for v19,
> this appears to be a typo and allows the option to be enabled unexpectedly
> on pre-v19 publishers. The attached 0001 patch fixes this by correcting
> the version constant.

One idea is to introduce a constant like RETAIN_DEAD_TUPLES_MIN_VERSION_NUM,
which avoids similar typo. Is it overengineering?

Best regards,
Hayato Kuroda
FUJITSU LIMITED