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Re: Moving text columns, when it actually is large

From: Richard Huxton <dev(at)archonet(dot)com>
To: Rob Sargent <robjsargent(at)gmail(dot)com>
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: Moving text columns, when it actually is large
Date: 2009-07-09 08:09:05
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-sql
Rob Sargent wrote:
> I have to restructure some tables, coalescing common elements from three 
> tables (sub-classes) into a single table (super-class).  Each source 
> table has a text field which actually gets stuffed with a largish (1Mb+) 
> blob of xml.
> Is there any way to simply, um, er, transplant the pointer rather than 
> actually copy the data?

If they are large-objects (stored via the lo_xxx interface) yes. If not, 
no. I take it the large blob of xml is one of the fields that you are 
classifying as common?

   Richard Huxton
   Archonet Ltd

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