RE: Can we have multiple tablespaces with in a database.

2020-02-21 Thread Patrick FICHE 
Hi,

You can create more than one tablespace and assign different objects on 
different tablespaces.
For example :
CREATE TABLESPACE test_data OWNER test LOCATION '/tmp/test_data';
CREATE TABLESPACE test_idx OWNER test LOCATION '/tmp/test_idx';

CREATE DATABASE test WITH TABLESPACE = test_data;

Then, for example, when create table and index, you can specify
CREATE TABLE test1

(
   id   int   NOT NULL GENERATED ALWAYS AS IDENTITY,
   comment  text,
   CONSTRAINT pk_test PRIMARY KEY
   (
  id
   ) USING INDEX TABLESPACE TEST_IDX
) TABLESPACE TEST_DATA;

CREATE INDEX sk_comment ON test1( comment ) TABLESPACE TEST_IDX;

Patrick Fiche
Database Engineer, Aqsacom Sas.
c. 33 6 82 80 69 96

[01-03_AQSA_Main_Corporate_Logo_JPEG_White_Low.jpg]

From: Daulat Ram 
Sent: Friday, February 21, 2020 7:23 AM
To: amul sul 
Cc: [email protected]; [email protected]
Subject: RE: Can we have multiple tablespaces with in a database.

That will be great if you  share any doc where it’s mentioned that we can’t use 
multiple tablespace for a single database. I have to assist my Dev team 
regarding tablespaces.

Also , what are the differences between Oracle and Postgres Tablespacs?

Thanks,


From: amul sul mailto:[email protected]>>
Sent: Friday, February 21, 2020 11:48 AM
To: Daulat Ram mailto:[email protected]>>
Cc: 
[email protected]; 
[email protected]
Subject: Re: Can we have multiple tablespaces with in a database.



On Fri, Feb 21, 2020 at 11:31 AM Daulat Ram 
mailto:[email protected]>> wrote:
Hi Amul ,
Please share the examples how we can create no. of tablespaces for a single 
database and how we can use them.
As I know we can create database on tablespace

  1.  CREATE TABLESPACE conn_tbs OWNER enterprisedb LOCATION 
'/mnt/pgdatatest/test/pgdata/conn_tbs';
  2.  Create database test tablespace ‘conn_tbs';
Maybe I have misunderstood your question; there is no option to specify more
than one tablespace for the database, but you can place the objects of that
database to different tablespaces (if options available for that object).
E.g. you can place a table in than conn_tbs tablespace.

If option is not specified then by default that object will be created
in conn_tbs.

Regards,
Amul

RE: Can we have multiple tablespaces with in a database.

2020-02-21 Thread Daulat Ram 
Thanks Patrick ,

From: Patrick FICHE 
Sent: Friday, February 21, 2020 9:54 PM
To: Daulat Ram ; amul sul 
Cc: [email protected]
Subject: RE: Can we have multiple tablespaces with in a database.

Hi,

You can create more than one tablespace and assign different objects on 
different tablespaces.
For example :
CREATE TABLESPACE test_data OWNER test LOCATION '/tmp/test_data';
CREATE TABLESPACE test_idx OWNER test LOCATION '/tmp/test_idx';

CREATE DATABASE test WITH TABLESPACE = test_data;

Then, for example, when create table and index, you can specify
CREATE TABLE test1

(
   id   int   NOT NULL GENERATED ALWAYS AS IDENTITY,
   comment  text,
   CONSTRAINT pk_test PRIMARY KEY
   (
  id
   ) USING INDEX TABLESPACE TEST_IDX
) TABLESPACE TEST_DATA;

CREATE INDEX sk_comment ON test1( comment ) TABLESPACE TEST_IDX;

Patrick Fiche
Database Engineer, Aqsacom Sas.
c. 33 6 82 80 69 96

[01-03_AQSA_Main_Corporate_Logo_JPEG_White_Low.jpg]

From: Daulat Ram mailto:[email protected]>>
Sent: Friday, February 21, 2020 7:23 AM
To: amul sul mailto:[email protected]>>
Cc: 
[email protected]; 
[email protected]
Subject: RE: Can we have multiple tablespaces with in a database.

That will be great if you  share any doc where it’s mentioned that we can’t use 
multiple tablespace for a single database. I have to assist my Dev team 
regarding tablespaces.

Also , what are the differences between Oracle and Postgres Tablespacs?

Thanks,


From: amul sul mailto:[email protected]>>
Sent: Friday, February 21, 2020 11:48 AM
To: Daulat Ram mailto:[email protected]>>
Cc: 
[email protected]; 
[email protected]
Subject: Re: Can we have multiple tablespaces with in a database.



On Fri, Feb 21, 2020 at 11:31 AM Daulat Ram 
mailto:[email protected]>> wrote:
Hi Amul ,
Please share the examples how we can create no. of tablespaces for a single 
database and how we can use them.
As I know we can create database on tablespace

  1.  CREATE TABLESPACE conn_tbs OWNER enterprisedb LOCATION 
'/mnt/pgdatatest/test/pgdata/conn_tbs';
  2.  Create database test tablespace ‘conn_tbs';
Maybe I have misunderstood your question; there is no option to specify more
than one tablespace for the database, but you can place the objects of that
database to different tablespaces (if options available for that object).
E.g. you can place a table in than conn_tbs tablespace.

If option is not specified then by default that object will be created
in conn_tbs.

Regards,
Amul