From: Adrian Klaver <adrian.klaver@gmail.com>
To: Tony Capobianco <tcapobianco@prospectiv.com>
Subject: Re: compare table names
Date: Mon, 9 Jan 2012 08:58:49 -0800
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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.klaver@gmail.com