[ovirt-devel] Important changes in the Search Engine code

[Eli Mesika]

Hi All

We had in the past many cases in which the search engine returned duplicate records.
Most of those cases are not simple to resolve in the DB layer by changing the query due to schema limitations.
We had decided to handle that by adding DISTINCT to the queries that the search engine generates  [1]
However, we might have cases in which both DISTINCT and ORDER BY f({args}) (where f is a function call) is used 
In that case, we will get SQL exception since the ORDER BY is applied on the DISTINCT result that does not include f as a field.
I had prevented using DISTINCT in such cases [2]
That means that you still may got duplicates in such cases and then you should handle it in the same method as in [3]
(basically returning the function result in the select as a computed field)


[1] https://gerrit.ovirt.org/#/c/31896
[2] https://gerrit.ovirt.org/#/c/38459
[3] https://gerrit.ovirt.org/#/c/36946


Thanks
Eli Mesika