RE: Insert data if it is not existing

From: tango ward [mailto:tangoward15(at)gmail(dot)com]
Sent: Thursday, May 24, 2018 8:16 PM
To: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
Cc: David G. Johnston <david(dot)g(dot)johnston(at)gmail(dot)com>; pgsql-generallists.postgresql.org <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: Re: Insert data if it is not existing

On Thu, May 24, 2018 at 9:38 PM, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com<mailto:adrian(dot)klaver(at)aklaver(dot)com>> wrote:
On 05/23/2018 06:03 PM, tango ward wrote:

Updated my code to this:

curr.pgsql.execute('''
INSERT INTO my_table(name, age)
SELECT %s, %s
WHERE NOT EXISTS(SELECT name FROM my_table WHERE name= name)
''', ('Scott', 23))

If I remove SELECT statement, I will get an error message: error : psycopg2.ProgrammingError: syntax error at or near "WHERE"
LINE 12: WHERE NOT EXISTS

Trying to coordinate with Lead Dev about adding Index On The Fly

I tried to figure how to make this work and could not, so I led you down a false path.

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com<mailto:adrian(dot)klaver(at)aklaver(dot)com>

What I tried is
'''INSERT INTO my_table(name, age)
SELECT %s, %s,
WHERE NOT EXISTS(SELECT name FROM my_table WHERE name=%s)''', ('Scott', 23, 'Scott'))

How about:

'''INSERT INTO my_table(name, age)
VALUES( %s, %s)
WHERE NOT EXISTS(SELECT name FROM my_table WHERE name=%s)''', ('Scott', 23, 'Scott'))

Regards,
Igor Neyman