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Declare your unique index to be a primary key. $sth->execute will fail if you try to insert a duplicated primary key.

mysql> create table trial (id varchar(5) primary key, perl_mod varchar +(30), summary varchar(255)); Query OK, 0 rows affected (0.06 sec) mysql> insert into trial set id='aaaaa', > perl_mod='CGI', > summary='Essential'; Query OK, 1 row affected (0.04 sec) mysql> insert into trial set id='aaaab', > perl_mod='DBI', > summary='Essential'; Query OK, 1 row affected (0.00 sec) mysql> insert into trial set id='aaaab', > perl_mod='Lingua__Romana__Perligata', > summary='Fun'; ERROR 1062: Duplicate entry 'aaaab' for key 1 mysql>

After Compline,
Zaxo


In reply to Re: How to count rows using DBI & mysql - Performance results by Zaxo
in thread How to count rows using DBI & mysql - Performance results by Brovnik

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