Обсуждение: is there a refactor

Hi,
I would like to have a simple way to retrieve information for a field name.  
By that I mean have some SQL select that will return all the tables a field 
name exist within a database.  I did not find anything with google but of 
course google depends on the search string.

Thanks in advance,
Johnf

Hi John,

everything you need is stored in these tables:
http://www.postgresql.org/docs/7.4/static/catalog-pg-attribute.html
http://www.postgresql.org/docs/7.4/static/catalog-pg-class.html
http://www.postgresql.org/docs/7.4/static/catalog-pg-namespace.html





--
---------------------------------------
Viktor Bojović
---------------------------------------
Wherever I go, Murphy goes with me

On Tuesday, April 05, 2011 7:27:24 am John Fabiani wrote:
> Hi,
> I would like to have a simple way to retrieve information for a field name.
> By that I mean have some SQL select that will return all the tables a field
> name exist within a database.  I did not find anything with google but of
> course google depends on the search string.
> 
> Thanks in advance,
> Johnf

test(5432)aklaver=>SELECT table_name from information_schema.columns  where 
column_name = 'id';  table_name   

----------------user_testtable2table1hoursjedit_testtopicst2stoneserial_testmessagesbinary_testuser_testtimestamp_testrole_tpy_testmoney_testlock_testlocal_1lang_testinterval_testfoobfooafldlengthfk_1default_testcsv_nullcheck_twocheck_testarray_test
(29 rows)

-- 
Adrian Klaver
adrian.klaver@gmail.com

You could also do something like:

select nspname, relname, attname
from pg_attribute a
 JOIN pg_class c ON (a.attrelid = c.oid)
 JOIN pg_namespace n ON (n.oid = c.relnamespace)
where a.attname ~ 'yourcolumn'
and c.relname !~ 'pg'
and n.nspname not in ('pg_catalog','information_schema')
order by 1,2,3;

I'd functionalize it.




--
Peter Steinheuser
psteinheuser@myyearbook.com

On Tuesday, April 05, 2011 07:44:51 am Adrian Klaver wrote:
> On Tuesday, April 05, 2011 7:27:24 am John Fabiani wrote:
> > Hi,
> > I would like to have a simple way to retrieve information for a field
> > name. By that I mean have some SQL select that will return all the
> > tables a field name exist within a database.  I did not find anything
> > with google but of course google depends on the search string.
> > 
> > Thanks in advance,
> > Johnf
> 
> test(5432)aklaver=>SELECT table_name from information_schema.columns  where
> column_name = 'id';
>    table_name

Wow that was quick - thanks to all!

Johnf