<para>

<application>PL/pgSQL</application> is similar to PL/SQL in many

aspects. It is a block-structured, imperative language, and all

variables have to be declared. Assignments, loops, conditionals

variables have to be declared. Assignments, loops,andconditionals

are similar. The main differences you should keep in mind when

porting from <application>PL/SQL</application> to

<application>PL/pgSQL</application> are: