Re: why do i get 2 as answer for select length('aa '::char(6)); - Mailing list pgsql-novice

From john snow
Subject Re: why do i get 2 as answer for select length('aa '::char(6));
Date
Msg-id CAE67tvW2RUH2vxksF4OoCb5nVVLt3cHkBKK=paJ2+MJVft1gWw@mail.gmail.com
Whole thread Raw
In response to Re: why do i get 2 as answer for select length('aa '::char(6));  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: why do i get 2 as answer for select length('aa '::char(6));
List pgsql-novice
thanks! you are right. we're porting a 20 year old xbase app and it's painful

On Wed, Jan 17, 2018 at 11:32 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
john snow <ofbizfanster@gmail.com> writes:
> when you say char-type values, do you include varchar?

No.  varchar and text consider trailing spaces to be significant.

To my mind, there are very few situations where char(n) is actually
a reasonable choice of datatype.  Maybe for US state abbreviations
or the like.  If you're even asking this question, it suggests that
you ought to be using varchar/text.

char(n) basically exists to support fixed-field-width data designs that
should have died along with the punched cards that inspired them.

                        regards, tom lane

pgsql-novice by date:

Previous
From: Tom Lane
Date:
Subject: Re: why do i get 2 as answer for select length('aa '::char(6));
Next
From: RABIN NATHAN
Date:
Subject: Re: why do i get 2 as answer for select length('aa '::char(6));