Task 1 Debugging

Signed-off-by: tianyuli <tli@wpi.edu>
setString() error in test case TestTask2_1
complete task1 except proper test case
Signed-off-by: tianyuli <tli@wpi.edu>
modify TestTask2_1.java
Merge branch 'task2' of https://github.com/buzouxun/SimpleDB_2.10 into task2
Signed-off-by: tianyuli <tli@wpi.edu>
modify TestTask2_1 from sh to eh
Merge branch 'task2' of https://github.com/buzouxun/SimpleDB_2.10 into task2
Signed-off-by: tianyuli <tli@wpi.edu>
modify test task by adding comments in next()
Merge branch 'task2' of https://github.com/buzouxun/SimpleDB_2.10 into task2
add hash in secondhashindex
ExtHashINdex as a wrapper works.
Signed-off-by: tianyuli <tli@wpi.edu>
Signed-off-by: tianyuli <tli@wpi.edu>
add one print in ExtHashIndex.java; modify TestTask2_1.java by adding selection query
Merge branch 'task2' of github.com:buzouxun/SimpleDB_2.10 into task2
Add local depth beginning

Signed-off-by: tianyuli <tli@wpi.edu>
add two Helper Functions: getSecIndex(), getGlobalDepth()