postgresql bytea (blob?)

Björnke von Gierke bvg at mac.com
Tue May 21 02:53:07 EDT 2013


Hmm maybe "x7" could indicate it's base15? They used to store ascii in that encoding, because it's "shorter" then 8 bits (base16)... Nope, it's not that, and it'd be (number)x or something like that anyway... fumbling around... what if there's a 0 missing at the start (0x is used for octal, base16, 8 bit)? Of course!

So what I did was encode the base16 codes to numbers and then chars, in a repeat loop (ignoring the x) and in the end i got: "{\rtf1\ansi\a" So that looks about right.

Here's the code:
--
on mouseUp
   put "x7b5c727466315c616e73695c616" into theData
   repeat for each char theChar in char 2 to -1 of theData
      put theChar after twoChars
      if the length of twoChars = 2 then
         put baseconvert(twoChars,16,10) into twoChars
         put numtochar(twoChars) after theResult
         put "" into twoChars
      end if
   end repeat
   put theResult -- {\rtf1\ansi\a
end mouseUp
--

cheers
Björnke


On 21.05.2013, at 04:11, Jose Damaso wrote:

> Hi - a legacy database at work contains a bytea field that I want to get
> the information out of. It's rich text that was for whatever reason, was
> stored as a blob to keep the formatting codes intact -- I'm not even sure
> what that means since no one here knows much about it and there is no
> documentation on the system. Does anyone know how to convert the returned
> query contents of this bytea field to text (or richtext?) with livecode? It
> looks like this
> 
> x7b5c727466315c616e73695c616... etc.
> when my basic query is
> put "SELECT c.reportnumber, c.reportblob from cases c WHERE c.ID = " &
> tCaseID into tQuery
> 
> Thanks!
> 
> I'm a layer2 guy at work but am planning to use Livecode as my programming
> gateway drug =)


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