> -----Original Message-----
> From: Tom Lane
> "Hiroshi Inoue" <Inoue(at)tpf(dot)co(dot)jp> writes:
> > Is there any way to convert rcbin(cooked text format) to the
> > raw(pre-cooked) Node expression?
> > Or is there a way to
> > convert rcsrc to the pre-cooked Node expression ?
> > Or is there a way to convert rcsrc to the cooked expression ?
> Another possibility is to determine the mapping from parent columns
> to child columns, and then walk through the (cooked) expression tree
> and substitute varattno field values in Var nodes accordingly. I'm
> not certain that's sufficient, but if it is it'd be a fairly small
> amount of code (in fact you might be able to just call the routines in
> the rewriter that do similar things).
OK,I would try this way using expression_tree_walker() which I
used once in my trial for ALTER TABLE DROP COLUMN.
In response to
pgsql-hackers by date
|Next:||From: Tom Lane||Date: 2000-08-04 06:30:21|
|Subject: Re: Anyone particularly wedded to func_tlist mechanism? |
|Previous:||From: Hiroshi Inoue||Date: 2000-08-04 02:00:52|
|Subject: RE: Anyone particularly wedded to func_tlist mechanism? |