how to use multiple schema's

On Tue, Sep 1, 2009 at 2:58 PM, Himanshu
Gupta<himanshu.gupta@semanticbits.com> wrote:

Hi,

I have multiple applications, i want to create separate schema for each of
the application. I dont want to change search path, since  have only one
user. I went through couple of post's talking about some patch related to
that. It seems that patch got rejected. Any help is appreciated.

I'm not sure how you want this to happen. Do you want a single user
to see ALL the schemas at once? Or do you want to set the search path
each time you connect? Is there a reason for having multiple apps hit
multiple schemas but use only one account? Multiple accounts (one for
each app) would certainly make things more manageable.

But mainly I'm just trying to get a grip on how you're trying to get
this to work.

I want single user to see all the schema at once. Database server is
on client side and it takes time to get new user or new database
instance, So i am trying to find a workaround for that.

Thanks,
Himanshu

On Sep 1, 2009, at 6:04 PM, Scott Marlowe wrote:

So, can you just set search_path to point to all the schemas at once
then? Or does that not meet your needs?

On Wed, Sep 2, 2009 at 7:19 AM, Himanshu
Gupta<himanshu.gupta@semanticbits.com> wrote:

I want single user to see all the schema at once. Database server is on
client side and it takes time to get new user or new database instance, So i
am trying to find a workaround for that.

Thanks,
Himanshu

On Sep 1, 2009, at 6:04 PM, Scott Marlowe wrote:

On Tue, Sep 1, 2009 at 2:58 PM, Himanshu
Gupta<himanshu.gupta@semanticbits.com> wrote:

Hi,

I have multiple applications, i want to create separate schema for each
of
the application. I dont want to change search path, since  have only one
user. I went through couple of post's talking about some patch related to
that. It seems that patch got rejected. Any help is appreciated.

I'm not sure how you want this to happen.  Do you want a single user
to see ALL the schemas at once? Or do you want to set the search path
each time you connect?  Is there a reason for having multiple apps hit
multiple schemas but use only one account?  Multiple accounts (one for
each app) would certainly make things more manageable.

But mainly I'm just trying to get a grip on how you're trying to get
this to work.

--
When fascism comes to America, it will be intolerance sold as diversity.

Hi Scott,

Thanks for response, bit if I point it to all the schema, I am just
wondering how data insertion will work, I have multiple ables with
same name in these applications.

-HImanshu

On Sep 2, 2009, at 10:48 AM, Scott Marlowe wrote:

OOPS I got caught by the reply verses reply-all and only sent this to
Scott. Plus I see it has already been addressed in a later message.

raa

Scott Marlowe wrote:

So, can you just set search_path to point to all the schemas at once
then? Or does that not meet your needs?

The only issue I see is if two or more of the "applications" have a
table named the same, like "users". Which gets used? The first found
in the search_path?

\\||/
Rod
--

On Wed, Sep 02, 2009 at 10:52:07AM -0400, Himanshu Gupta wrote:

Thanks for response, bit if I point it to all the schema, I am just
wondering how data insertion will work, I have multiple ables with
same name in these applications.

Do you know that you can schema qualify table names don't you? For
example, if you have a "users" table in schemas "app1" and "app2", you
can refer to the table in the first schema as:

SELECT uid, name
FROM app1.users;

--
Sam http://samason.me.uk/

Sam Mason wrote:

On Wed, Sep 02, 2009 at 10:52:07AM -0400, Himanshu Gupta wrote:

Thanks for response, bit if I point it to all the schema, I am just
wondering how data insertion will work, I have multiple ables with
same name in these applications.

Do you know that you can schema qualify table names don't you? For
example, if you have a "users" table in schemas "app1" and "app2", you
can refer to the table in the first schema as:

SELECT uid, name
FROM app1.users;

Himanshu didn't mention if he has access to the code for the
applications or can edit them.

\\||/
Rod
--

Here is my first post which missed the list. Not that it makes that
much of a difference now as all my points have been addressed by others.

raa

Himanshu Gupta wrote:

Hi,

I have multiple applications, i want to create separate schema for each
of the application. I dont want to change search path, since have only
one user. I went through couple of post's talking about some patch
related to that. It seems that patch got rejected. Any help is appreciated.

Why not change the search_path?

There is only way I'm aware of to get around changing the search_path;
You must code the schema name(s) into the application.

Or you could make the search_path change part of the application(s).

I have put LedgerSMB, RT, and a couple of in-house applications into
their own schema. Since each has it's own "user/role" for connecting to
the database cluster having different (than the default) search_path per
user isn't a problem.

In fact I have a cluster with a database per tenant. Each tenant has
(or can have) LedgerSMB, RT, and/or other applications in their database
and each application is in it's own schema.

But I digress/diverge.

\\||/
Rod
--