>>>Hannu Krosing said:
 > Tom Lane kirjutas N, 23.01.2003 kell 02:04:
 > > We already do cache column offsets when they are fixed.  The code that's
 > > the problem executes when there's a variable-width column in the table
 > > --- which means that all columns to its right are not at fixed offsets,
 > > and have to be scanned for separately in each tuple, AFAICS.
 > Not only varlen columns, but also NULL columns forbid knowing the
 > offsets beforehand.

Does this mean, that constructing tables where fixed length fields are 
'before' variable lenght fields and 'possibly null' fields might increase 


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