Till Westmann wrote:
Very nice, one submission and we've got an optimizer :)
It seems that we got rid of the OOM in the XQTS with these optimizations.
Is that right?
Currently the optimizer has only three rules:
1. Eliminate Let clauses whose variables are unused.
2. Substitute X instanceof Y with a constant using static type analysis.
3. if (true) THEN else ELSE -> THEN, and if (false) THEN else ELSE -> ELSE.
I do not know if this is sufficient to eliminate the OOM. I was never
able to see the OOM because I run a 64bit VM and the default amount of
heap is good enough to run the XQTS. The problem with the long running
query still exists. I still need to write the rules to introduce
subsequence() in place of the $pos eq intvalue.
Vinayak
Thanks,
Till
