UPDATE ... SET <col> = 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(at)rbt(dot)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(at)rbt(dot)ca>

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