Say i have one-to-many relationship between Product and ProductNames
Product ----> PID (PK)
ProductNames------> PID, USECODE, STARTTIME as composite ID and ENDTIME is another normal column.
Now i want to fetch product with PID='1' and USECODE='100' and STARTTIME < CURRENTTIME < ENDTIME.
CURRENTTIME value will be known at runtime.
How to specify this in mapping and fetch Product & ProductNames using eager fetching?
ANS: Using Filters, this problem can be resolved. Define filter, attach filter and enable filter. Filter supports
specifying positional parameters value at runtime.
but i got 1 problem with filters :
Suppose i have 1 product with id as 100, it has 5 ProductNames..but when we apply filter only 2 productNames remains.
When i use just "inner join fetch" with no filters, it returns me one Product object which contains List of productNames properly
BUT When i use "select distinct product" and inner join fetch" with filter, it returns one product populated with productNames
list which contains 3 elements viz. null, first filtered productName, second filtered productName..
Why productNames list contains the first element as null? This seems to be a bug..