find column name that has under score (_)

akp geek <akpgeek@gmail.com> Thursday 17 February 2011 19:55:46

Hi all -

I am trying to write a query to find all the column names in
database that has a underscore in it (_) example souce_id. I know like will
not work , if where column_name like '%_%' Can you please help?

Regards

Try SELECT * from pg_attribute where attname not like E'%\\_%' .... - i'm not
familiar with this.

thanks . It worked

Regards

On Thu, Feb 17, 2011 at 2:05 PM, Radosław Smogura
<rsmogura@softperience.eu>wrote:

Try just using the string function "position". You'll need to check the
documentation or wait for others to determine which specific system views
you will need to obtain the column name (if you do not already know that
part).

position(substring in string) int

Non-Zero (or maybe >= 0) indicates the substring was found - though I would
test with some known sample data just to make sure before running it on the
column names.

Dave

From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org] On Behalf Of akp geek
Sent: Thursday, February 17, 2011 1:56 PM
To: pgsql-general
Subject: [GENERAL] find column name that has under score (_)

Hi all -

I am trying to write a query to find all the column names in
database that has a underscore in it (_) example souce_id. I know like will
not work , if where column_name like '%_%' Can you please help?

Regards

On Thu, Feb 17, 2011 at 01:55:46PM -0500, akp geek wrote:
- Hi all -
-
- I am trying to write a query to find all the column names in
- database that has a underscore in it (_) example souce_id. I know like will
- not work , if where column_name like '%_%' Can you please help?
-
- Regards

select table_schema,table_name, column_name from information_schema.columns where column_name like '%\\_%';

seems to do the trick.

Dave

that's right. Thanks again all for the help

On Thu, Feb 17, 2011 at 2:09 PM, David Kerr <dmk@mr-paradox.net> wrote:

On Thu, Feb 17, 2011 at 01:55:46PM -0500, akp geek wrote:

Hi all -

I am trying to write a query to find all the column names in
database that has a underscore in it (_) example souce_id. I know like will
not work , if where column_name like '%_%' Can you please help?

where column_name ~ '_'

Best regards,

depesz

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