Do we need a TODO for this?


Tom Lane wrote:
> Markus Schiltknecht <[EMAIL PROTECTED]> writes:
> > I've just found the stumbling block: the -c option of psql wraps all in 
> > a transaction, as man psql says:
> > ...
> > Thank you for clarification, I wouldn't have expected that (especially 
> > because CREATE DATABASE itself says, it cannot be run inside a 
> > transaction block... A transaction block (with BEGIN and COMMIT) seems 
> > to be more than just a transaction, right?)
> Hm, that's an interesting point.  psql's -c just shoves its whole
> argument string at the backend in one PQexec(), instead of dividing
> at semicolons as psql does with normal input.  And so it winds up as
> a single transaction because postgres.c doesn't force a transaction
> commit until the end of the querystring.  But that's not a "transaction
> block" in the normal sense and so it doesn't trigger the
> PreventTransactionChain defense in CREATE DATABASE and elsewhere.
> I wonder whether we ought to change that?  The point of
> PreventTransactionChain is that we don't want the user rolling back
> the statement post-completion, but it seems that
>       psql -c 'CREATE DATABASE foo; ABORT; BEGIN; ...'
> would bypass the check.
>                       regards, tom lane
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  Bruce Momjian   [EMAIL PROTECTED]

  + If your life is a hard drive, Christ can be your backup. +

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