Hello,
I am considering using the document id in order to implement a fast 'join' during
relational search.
My first question is: should I steer clear of this all together? And why? If not, I
need to know which Lucene operations can cause document ids to change.
I am assuming that the following can cause potential changes:
1) Add document
- since it might trigger a merge
2) Optimize index
- since it does trigger a merge
3) Update document
- since it is a delete + add
What else could cause a document id to change? Could delete provoke a doc id change?
And, I am assuming that the following DO NOT change the document id:
1) Query the index
Also, am I missing any others that will or will not cause a document id to change?
Thank you,
Tate
P.S. It appears (to me) that the SearchBean (in lucene sandbox) sorting makes use of
the Hits.id(int _n) method. How does it cope, if at all, with changes to the
underlying document ids?
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