Hello,
> As partitions is an integer type variable, the maximum value it can
> hold is "2147483647". But if I specify partitions as "3147483647",
> atoi function returns a value lesser than zero and pgbench terminates
> with an error. However, if the value for number of partitions
> specified is something like "5147483647", atoi returns a non-negative
> number and pgbench creates as many number of partitions as the value
> returned by atoi function.
>
> This seems like a problem with atoi function, isn't it?
Yes.
> atoi functions has been used at several places in pgbench script and I
> can see similar behaviour for all. For e.g. it has been used with
> scale factor and above observation is true for that as well. So, is
> this a bug or you guys feel that it isn't and can be ignored? Please
> let me know your thoughts on this. Thank you.
I think that it is a known bug (as you noted atoi is used more or less
everywhere in pgbench and other commands) which shoud be addressed
separately: all integer user inputs should be validated for syntax and
overflow, everywhere, really. This is not currently the case, so I simply
replicated the current bad practice when developing this feature.
There is/was a current patch/discussion to improve integer parsing, which
could address this.
--
Fabien.