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.klaver@gmail.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
