Re: Some frustrations with admin tasks on PGSQL database - Mailing list pgsql-general

On Fri, Aug 17, 2007 at 07:49:08PM +0800, Phoenix Kiula wrote:
> I have dropped all indexes/indicises on my table, except for the
> primary key. Still, when I run the query:
>     UPDATE mytable SET mycolumn = lower(mycolumn);

can you please check this:

select count(*) from mytable;
select count(*) from mytable where mycolumn ~ '[A-Z]';

and if the second is lower than first make the update:
update mytable set mycolumn = lower(mycolumn) where mycolumn ~ '[A-Z]';

of course if your data contain national characters you have to include
them (upper case only) in this regexp.

depesz

--
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