/
p4_q1.py
46 lines (41 loc) · 1.17 KB
/
p4_q1.py
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from library import sqlQuery
from library import *
try: # Drop procedure if it exists
sqlQuery('DROP PROCEDURE addFines')
except: # It didn't exist
pass
# Now define it
sqlQuery("""
CREATE PROCEDURE addFines(IN fine INTEGER) BEGIN
DECLARE myPnid INT;
DECLARE myDate DATE;
DECLARE done INT DEFAULT FALSE;
DECLARE pnids CURSOR FOR SELECT pnid, `to` FROM members NATURAL JOIN reserved_by WHERE type = "borrowed" AND `to` < CURRENT_DATE;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
OPEN pnids;
read_loop: LOOP
FETCH pnids INTO myPnid, myDate;
IF done THEN
LEAVE read_loop;
END IF;
IF EXISTS(SELECT 1 FROM employees WHERE pnid = myPnid) THEN
UPDATE employees SET salary = salary - fine * (CURRENT_DATE - myDate) WHERE pnid = myPnid LIMIT 1;
ELSE
UPDATE members SET balance = balance + fine * (CURRENT_DATE - myDate) WHERE pnid = myPnid LIMIT 1;
END IF;
END LOOP;
CLOSE pnids;
END
""")
fine = None
while fine is None:
try:
fine = int(raw_input('How much is the fine? '))
except:
print 'Please enter an integer.'
fine = None
transactionStart()
c = makeCursor()
c.callproc('addFines', [fine])
transactionCommit()
print 'Done.'