Re: Verifying variable names in pgbench

Robert Haas <robertmhaas(at)gmail(dot)com> wrote:

> > The attached patch verifies variable names at definition.
> > $ pgbench -D var:name=value
> > (global): invalid variable name 'var:name'
>
> I have reviewed this patch. I think that the basic idea of rejecting
> invalid variable names is probably a good one, but I'm not totally
> happy with the implementation. In particular:
>
> 1. The code that prints the invalid variable name message seems
> bizarrely complex and inexplicable relative to the way errors are
> handled elsewhere in the code. If we really need to do this, it
> should be in its own function, not buried inside putVariable(), but
> isn't there some simpler alternative?

We can remove the complexity if we give up showing the command (arg0)
in error messages. Shall we remove it? Simplified patch attached.

> 2. I think it would be worth abstracting the actual test into a
> separate function, like isLegalVariableName().
> 3. In the department of nitpicking, I believe that the for loop test
> should be written as something like name[i] != '\0' rather than just
> name[i], for clarity.

Adjusted.

Regards,
---
Takahiro Itagaki
NTT Open Source Software Center