[GENERAL] POWA tool

[Ramesh T]

Hello,

             when i ran  following query,
              postgres=# SELECT * FROM pg_stat_statements;


              ERROR:  relation "pg_stat_statements" does not exist
              LINE 1: SELECT * FROM pg_stat_statements;


i need to install POWA..i got powa.zip
 please let me know how to install POWA.ZIP for my postgres using putty
tool ..

thanks,