UPDATE ... SET = DEFAULT

Modify rewriteTargetList() to deal with a SetToDefault node
InsertDefault renamed.

Teach updateTargetListEntry() to use the columns type rather than
calling exprType for it, since SetToDefault does not have a type but is
stored in (TargetEntry *)->expr

Remove special case in insert code.  Let the default request flow
through the same as the update case.


On Thu, 2003-06-05 at 16:45, Tom Lane wrote:
> Rod Taylor <rbt@rbt.ca> writes:
> > It would seem a new primnode (change InsertDef into SetDefault or
> > similar) will be required with some executor logic.
>
> It is not the executor's business to know about defaults.  The rewriter
> is the place where defaults get inserted - see rewriteTargetList().
>
> Note that default NULL will have to be treated a little differently from
> what we do for INSERT, since the, um, default behavior of UPDATE is to
> preserve columns rather than replace 'em with nulls.
>
>             regards, tom lane

--
Rod Taylor <rbt@rbt.ca>

PGP Key: http://www.rbt.ca/rbtpub.asc