Re: Query on array-elements inside object

Hi, there

I believe that if you create a function with PL/pgSQL that take a text array as
parameter:
create function cancer(_text) returns bool as '
declare
.....
begin
use a while loop here to scan the whole array
if string match 'cancer' immediately return true otherwise
end the loop
return false
end;
' language 'plpgsql';


Umashankar Kotturu wrote:

> Hi,
>
> I am new to Postgres as well as object database. Wondering if one of you can
> tell me on how to write a sql query to select an object that has a
> particular element in an array.
>
> Example
>
> If I create an object-table with 2 elements.
> a) PatientID -> numeric
> b) DiseaseArray -> array of text
>
> - This DiseaseArray has elements like "cancer", "tb" etc...
>
> Now how will I write a sql-query to select all patients that have "cancer"
>
> Any pointers will be helpful.
>
> regards,
> Uma.
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