Re: Portal destination issue: binary vs normal cursors

Can we get BINARY supported in ordinary SELECT too, while you are there?
Hard to argue why BINARY works only for cursors.

> Jan,
>
> I discovered yesterday that DECLARE BINARY CURSOR was broken in CVS tip:
> when you do a FETCH from a binary cursor, you get back ASCII data.
>
> The problem seems to have been induced by your patch for SPI cursor
> support, specifically commands/command.c version 1.128: what had been
> if (dest == None)
> override portal's destination with requested dest
> became
> if (dest != queryDesc->dest)
> override portal's destination with requested dest
>
> Now a FETCH always passes the standard output destination, normally
> Remote, and so this breaks binary cursors which have dest =
> RemoteInternal and need to stick to that.
>
> I changed the code to look like this:
>
> /*
> * If the requested destination is not the same as the query's
> * original destination, make a temporary QueryDesc with the proper
> * destination. This supports MOVE, for example, which will pass in
> * dest = None.
> *
> * EXCEPTION: if the query's original dest is RemoteInternal (ie, it's
> * a binary cursor) and the request is Remote, we do NOT override the
> * original dest. This is necessary since a FETCH command will pass
> * dest = Remote, not knowing whether the cursor is binary or not.
> */
> if (dest != queryDesc->dest &&
> !(queryDesc->dest == RemoteInternal && dest == Remote))
> {
> ... override
>
> This makes binary cursors work again, and it didn't break the regression
> tests, but I thought you should take a look at it. I don't know what
> aspect of SPI cursors led you to make the original change, so maybe this
> version isn't right for SPI cursors.
>
> regards, tom lane
>
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