Re: Re: toast by chunk-end (was Re: PG_PAGE_LAYOUT_VERSION 5 - time for change) - Mailing list pgsql-hackers

From Zdenek Kotala
Subject Re: Re: toast by chunk-end (was Re: PG_PAGE_LAYOUT_VERSION 5 - time for change)
Date
Msg-id 4922E8F4.7070906@sun.com
Whole thread Raw
In response to Re: Re: toast by chunk-end (was Re: PG_PAGE_LAYOUT_VERSION 5 - time for change)  (Alvaro Herrera <alvherre@commandprompt.com>)
List pgsql-hackers
Alvaro Herrera napsal(a):
> Zdenek Kotala wrote:
> 
>> If I'm thinking more, it is not probably CATALOG_VERSION_NO as well. 
>> Because toast table is created on demand. It is not in BKI.
> 
> It's not catversion in the sense that there's no catalog change, but it
> certainly requires a catversion bump due to internal changes.
> Otherwise, developers who have working data directories today will see
> weird errors when they update to a CVS version after this commit.
> 

I understand it but from upgrade point of view it is confusing. When you upgrade 
catalog then you catalog will not correspond with toast table structure and 
there is no clue if toast table is or is not already converted or which toast 
table structure is used.
    Zdenek


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