Using Insert with case

Hi

 

select

case when somevariable = 2

    then (insert into pipe (line)

        select bob.edge_data.edge_id

        from bob.edge_data, bob.node, pipe

        where st_intersects(st_startpoint(bob.edge_data.geom), bob.node.geom)

        and bob.node.node_id = 415

        and pipe.id = 1)

 

I am attempting to use the above. However, with or without the enclosing brackets I get a syntax error on the word into.

 

Help will be appreciated.

 

Bob