Insert after TRUE in condition in PostgreSQL - sql

Question

I need to insert my values if only they are not presented in my table.
I wrote the function:
do
$$
declare
v_video_config_bundle_id bigint;
v_are_records_exist boolean;
begin
select id from config_bundle into v_video_config_bundle_id where code = 'video';
select count(id) > 0 from config_bundle into v_are_records_exist
where config_bundle_id = v_video_config_bundle_id
and preference = 'true' and amount = 0 and repeatability in (1,7,14,21,30,45) and format='day';
case
when (v_are_records_exist = false) then
insert into config_plan(config_bundle_id, amount, repeatability, format, payment_amount, preference_type, preference, trial, weight, status, is_default)
values (v_video_config_bundle_id, 0, 7, 'day', 0, 'personal', true, false, 2, 'ACTIVE', false),
(v_video_config_bundle_id, 0, 14, 'day', 0, 'personal', true, false, 2, 'ACTIVE', false),
(v_video_config_bundle_id, 0, 21, 'day', 0, 'personal', true, false, 2, 'ACTIVE', false);
end;
end;
$$
But I still get an exception ERROR:
syntax error at or near ";"
Position: 1420
How to fix it?

Answer 1

Let SQL make all decisions; put all the determination logic into a single SQL statement. You can do this by converting the filtering logic into NOT EXISTS (SELECT ... structure. So something like:
insert into config_plan(config_bundle_id, amount, repeatability, format, payment_amount, preference_type, preference, trial, weight, status, is_default)
with new_config ( amount, repeatability, format, payment_amount, preference_type, preference, trial, weight, status, is_default) as
( values ( 0, 7, 'day', 0, 'personal', true, false, 2, 'ACTIVE', false),
( 0, 14, 'day', 0, 'personal', true, false, 2, 'ACTIVE', false),
( 0, 21, 'day', 0, 'personal', true, false, 2, 'ACTIVE', false)
)
select amount, repeatability, format, payment_amount, preference_type, preference, trial, weight, status, is_default
from new_config nc
where not exists ( select null
from config_plan cp
where (cp.preference, cp.amount , cp.repeatability ,cp.format) =
(nc.preference, nc.amount , nc.repeatability ,nc.format)
) ;
The above is not tested as you did not supply table description and sample data. However, see here for an example of the technique.