"Dann Corbit" <[EMAIL PROTECTED]> writes:
> For the disk case, why not have the start of the record contain an array
> of offsets to the start of the data for each column?  It would only be
> necessary to have a list for variable fields.

No, you'd need an entry for *every* column (or at least, every one to
the right of the first variable-width column or NULL).  That's a lot of
overhead, especially in comparison to datatypes like bool or int4 ...

                        regards, tom lane

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