On Tue, Dec 04, 2007 at 03:38:16PM -0300, Alvaro Herrera wrote: > > So is it simply field width? Can one count the number of bytes based > > on native datatype length and determine field start/end? > > Yes. For variable length types, there is a 4-byte length word at the > start of the field (unless you are using 8.3 which introduces more > compact representations in some cases).
And NULLs are skipped entirely. They are represented in the null-bitmap at the beginning of the tuple. What sometimes works is creating a new table with the exact same structure, shutting down the postmaster and copying the old table over the new one. If it's the same cluster and the clog/xlog are still there it might work. Have a nice day, -- Martijn van Oosterhout <[EMAIL PROTECTED]> http://svana.org/kleptog/ > Those who make peaceful revolution impossible will make violent revolution > inevitable. > -- John F Kennedy
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