Re: compare table names

Just my 2 cents...

Why don't you use a date column type instead of a string ? In this case, at
insertion, you could simply do this :

INERT INTO tablename (insertion_time, ...) VALUES (now(), ...)

and, for the select, you could simply write :

SELECT * FROM tablename WHERE insertion_time >= (now() - interval '1 day')

2012/1/9 Adrian Klaver <adrian(dot)klaver(at)gmail(dot)com>

> On Monday, January 09, 2012 8:28:43 am Tony Capobianco wrote:
> > I see what you're saying:
> >
> > pg=# select tablename from pg_tables where tablename like 'tmp_staging%'
> > and tablename < 'tmp_staging1230' and tablename > 'tmp_staging1228';
> > tablename
> > --------------------
> > tmp_staging1229
> >
> >
> > This query is part of a larger script where I want to dynamically select
> > tablenames older than 10 days and drop them. The tables are created in
> > a tmp_stagingMMDD format. I know postgres does not maintain object
> > create times, how can I write this to select tables from pg_tables that
> > are older than 10 days?
>
> Well with out a year number(i.e. YYMMDD) that is going to be difficult
> around the
> year break.
>
> As an example:
>
> test(5432)aklaver=>select * from name_test;
> fld_1
> -----------------
> tmp_staging0109
> tmp_staging0108
> tmp_staging1229
> (3 rows)
>
> test(5432)aklaver=>SELECT fld_1 from name_test where fld_1 <
> 'tmp_staging'||
> to_char(current_date-interval '10 days','MMDD') and fld_1 >
> 'tmp_staging0131';
> fld_1
> -----------------
> tmp_staging1229
>
>
>
> >
> > Thanks.
> > Tony
> >
>
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)gmail(dot)com
>
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