Re: proposal: numeric scale functions

From: Peter Eisentraut <peter_e(at)gmx(dot)net>
To: Marko Tiikkaja <marko(at)joh(dot)to>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: proposal: numeric scale functions
Date: 2015-11-11 13:53:58
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On 11/11/15 5:03 AM, Marko Tiikkaja wrote:
> Dealing with "numeric"s right now in cases where it's really important
> that the scale is correct is quite painful. For example, if I want to
> accept a EUR amount as an input, I often want to reject values such as
> '21.413', but I'd be fine with e.g. '21.410000'. My suggestion is to
> add two functions: one to return the number of decimal places in a
> numeric, and another one to remove non-significant decimal places.

I can see both of these being useful, but the terminology is not
correct. The trailing zeroes are "significant". Maybe the function
could be called "trim", in analogy to trimming whitespace off strings.

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