#464 TupleIterator::open() (TupleIterator.cxx:68) leaks

[Nihar Ranjan paital]

i run the testscript DMLThreadTest under Performance directory
through valgrind tool as
valgrind --tool=memcheck --leak-check=full --show-reachable=yes
./DMLThreadTest
and found Memory leak

Error Summary :==28544== 8 bytes in 1 blocks are indirectly lost in loss record 4 of 18
==28544== at 0x4005CCC: operator new(unsigned) (vg_replace_malloc.c:163)
==28544== by 0x40360A7: TupleIterator::open() (TupleIterator.cxx:68)
==28544== by 0x403428B: TableImpl::execute() (TableImpl.cxx:256)
==28544== by 0x8049053: main (in csql/test/performance/DMLThreadTest)