Add Constraint - Mailing list pgsql-sql

From Sivagami .
Subject Add Constraint
Date
Msg-id 006a01c03eac$231a0a20$43c0f4d1@worlddata.com
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Responses Re: Add Constraint
List pgsql-sql
Hi all,
 
I am a newbie to Postgresql, but I am familiar with SQL. I am trying to add a constraint to my table using the ALTER TABLE command. The command goes like this :
 
ALTER TABLE USER_SIGNUP ADD CONSTRAINT
P_USER_SIGNUP_USER_ID PRIMARY KEY(user_id);
 
But it is returning the error
ERROR:  ALTER TABLE / ADD CONSTRAINT is not implemented
 
Can anyone guide me in the right direction???
 
Thanks.
Shiva

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