Hi!
Product type table contains product types. Some ids may missing :
create table artliik (liiginrlki char(3) primary key);
insert into artliik values('1');
insert into artliik values('3');
insert into artliik values('4');
...
insert into artliik values('999');
Property table contais comma separated list of types.
create table strings ( id char(100) primary key, kirjeldLku chr(200) );
insert into strings values ('item1', '1,4-5' );
insert into strings values ('item2', '1,2,3,6-9,23-44,45' );
Type can specified as single integer, e.q 1,2,3 or as range like 6-9 or 23-44
List can contain both of them.
How to all properties for given type.
Query
select id
from artliik
join strings on ','||trim(strings.kirjeldLku)||',' like '%,'||trim(artliik.liiginrlki)||',%'
returns date for single integer list only.
How to change join so that type ranges in list like 6-9 are also returned?
Eq. f list contains 6-9, Type 6,7,8 and 9 shoud included in report.
Postgres 13 is used.
Posted also in
https://stackoverflow.com/questions/72404218/how-determine-if-range-list-contains-specified-integer
Andrus.
Hello,
As Adrian said the best idea would be to redesign your data model. For example make a third "contains" table where every product/type relationship is one record. After that your problem would be trivial and your life much easier.
However, this is a first class place. The customer wants the pain the customer gets the pain:
Bad idea which solves the immediate problem 1:
Write a function which unpacks your "1,2,3,6-9,4" string into an array '1','2','3','6','7','8','9','4' and use the string=ANY(array_of_strings) syntax.
Bad idea which solves the immediate problem 2:
Write a trigger which unpacks the the "1,2,3,6-9,4" form into "1,2,3,6,7,8,9,4" at insert/update time and then use the the string=ANY(array_of_strings) syntax.
Regards,
Sándor
