in one case the update() statement is constructed knowing the VALUES
clause ahead of time so that it can render the NOW() function. In the
latter case, execute() compiles the update() statement passing along the
key names of the given parameters but not the values, which are all
assumed to be bind parameters. its primarily an implementation detail
for internal performance purposes.
Moshe C. wrote:
>
> table.update(criterion, values={'last_edited' : func.now()} ).execute
> ()
> works
>
> but
> table.update(criterion ).execute({'last_edited' : func.now()})
> does not. It tries to set 'last_edited' to functions object.
>
> Can someone clarify the difference ?
>
>
> >
>
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