Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1uEScp-008Rhi-Ol for pgsql-general@arkaria.postgresql.org; Mon, 12 May 2025 12:51:20 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1uEScn-00Frc1-Kd for pgsql-general@arkaria.postgresql.org; Mon, 12 May 2025 12:51:17 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1uEScn-00FrZB-4D for pgsql-general@lists.postgresql.org; Mon, 12 May 2025 12:51:17 +0000 Received: from cloud.gatewaynet.com ([185.90.37.94]) by magus.postgresql.org with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uEScj-001Vk8-2u for pgsql-general@lists.postgresql.org; Mon, 12 May 2025 12:51:16 +0000 Content-Type: multipart/mixed; boundary="------------dHdWa0soLj1rn1yGvu55FmCa" Message-ID: <59659764-5790-430c-b38d-e4ecdd4a744a@cloud.gatewaynet.com> Date: Mon, 12 May 2025 13:50:12 +0100 MIME-Version: 1.0 Subject: Re: Postgresql 18beta1 and SPI changes To: Tom Lane Cc: "pgsql-general@lists.postgresql.org" , itdev@gatewaynet.com References: <1e1e7585-4d72-4759-a49c-e58cd65be375@cloud.gatewaynet.com> <892274.1746976813@sss.pgh.pa.us> Content-Language: en-US From: Achilleas Mantzios In-Reply-To: <892274.1746976813@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk This is a multi-part message in MIME format. --------------dHdWa0soLj1rn1yGvu55FmCa Content-Type: multipart/alternative; boundary="------------cB731ITgkKmpBcTQwNenPO7x" --------------cB731ITgkKmpBcTQwNenPO7x Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Dear All, Dear Tom On 5/11/25 16:20, Tom Lane wrote: > Achilleas Mantzios writes: >> We use are own version of DBmirror, we run our replication in a highly >> fine grained manner. So every upgrade I have to make the code compile >> and test. Up to PostgreSQL 17, I only got minor compilation problems >> that I managed to resolve fairly easily. However this didn't prove to be >> the case with PostgreSQL 18beta1, it proved harder to compile and as my >> fears were verified, it has serious problems. >> My question : is 18's SPI stabilized ? Can I start work on our version >> of DBmirror ? Or wait for 18beta2 or -RC ? > If you think there are changes we need to make, you'd better get > specific sooner not later. I'm not aware of any large fixes that > are pending, cf > > https://wiki.postgresql.org/wiki/PostgreSQL_18_Open_Items I attach a) our old source (pending.c.orig), as of PostgreSQL 17 (tested for some 7 months, so pretty well tested), b) the compilation errors when compiled against 18beta1, and c) the patch that I came up with, which seems (in my minimal testing) to yield correct results on 18beta1. The majority of serious warnings have to do with de-toasting arrays and the PK's int2vector , while the error has to do with getting column details such as attisdropped and attname. Please have a look, and share your thoughts. I haven't touched serious C coding till I first wrote the above sometime in 2004 with a bunch of additions some years ago. > > regards, tom lane --------------cB731ITgkKmpBcTQwNenPO7x Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit

Dear All, Dear Tom

On 5/11/25 16:20, Tom Lane wrote:

Achilleas Mantzios <a.mantzios@cloud.gatewaynet.com> writes:

We use are own version of DBmirror, we run our replication in a highly 
fine grained manner. So every upgrade I have to make the code compile 
and test. Up to PostgreSQL 17, I only got minor compilation problems 
that I managed to resolve fairly easily. However this didn't prove to be 
the case with PostgreSQL 18beta1, it proved harder to compile and as my 
fears were verified, it has serious problems.


      

        
My question : is 18's SPI stabilized ? Can I start work on our version 
of DBmirror ? Or wait for 18beta2 or -RC ?


      

      
If you think there are changes we need to make, you'd better get
specific sooner not later.  I'm not aware of any large fixes that
are pending, cf

https://wiki.postgresql.org/wiki/PostgreSQL_18_Open_Items

    

    
I attach 

    
a) our old source (pending.c.orig), as of PostgreSQL 17 (tested
      for some 7 months, so pretty well tested), 

    
b) the compilation errors when compiled against 18beta1, and 

    
c) the patch that I came up with, which seems (in my minimal
      testing) to yield correct results on 18beta1. 

    

    
The majority of serious warnings have to do with de-toasting
      arrays and the PK's int2vector , while
      the error has to do with getting column details such as attisdropped
      and attname.
    

    
Please have a look, and share your thoughts. I haven't touched
      serious C coding till I first wrote the above sometime in 2004
      with a bunch of additions some years ago. 

    

    


    

    

      

			regards, tom lane


    

  


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