FARRAGO: fix dtbug 670 (uncached statements not properly deallocated)
FARRAGO: fix dtbug 670 (uncached statements not properly deallocated)

[git-p4: depot-paths = "//open/dt/dev/": change = 7741]

LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb