Re: Re: [HACKERS] Is it necessary to rewrite table while increasing the scale of datatype numeric？

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Greg Stark <stark(at)mit(dot)edu>
Cc: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, wangshuo(at)highgo(dot)com(dot)cn, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Re: [HACKERS] Is it necessary to rewrite table while increasing the scale of datatype numeric？
Date: 2013-09-05 19:53:38
Message-ID: 20130905195337.GE6067@eldon.alvh.no-ip.org
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Greg Stark escribió:

> The main difficulty is that Postgres is very extensible. So to implement
> this you need to think bigger than NUMERIC. It should also be possible to
> alter a column from varchar(5) to varchar(10) for example (but not the
> other way around).

We already allow that. See commits
8f9fe6edce358f7904e0db119416b4d1080a83aa and
3cc0800829a6dda5347497337b0cf43848da4acf

--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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