script-6.py

from __future__ import print_function
import random
from copy import copy
import time
import sys

import cx_Oracle

userName=sys.argv[1]
password=sys.argv[2]
connectionString=sys.argv[3]
connection = cx_Oracle.connect(userName, password, connectionString)

connection.stmtcachesize = 500
cursor = connection.cursor()



users=[{'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}, {'lastName': 'A'}]

subQuery="SELECT :last_name0 AS last_name FROM dual"

for x in range(1, 30):
	subQuery=subQuery + " UNION SELECT :last_name{} AS last_name FROM dual".format(x,x)

query="""SELECT 'blahhh' FROM dual WHERE dummy IN ({subQuery}) """.format(subQuery = subQuery)
for j in range(100):
	#cursor = connection.cursor()
	for x, u in enumerate(users):
		copyOfList=copy(users)
		random.shuffle(copyOfList)
		randomNumber=random.randint(1,19)
		partialUsers=copyOfList[0:randomNumber]
		binds={}
		for i,user in enumerate(partialUsers):
			binds.update({'last_name'+str(i): user["lastName"]})
			
		for i in range(randomNumber, 30):
			binds.update({'last_name'+str(i): "DUMMY"})
		try:
			rows = cursor.execute(query, binds)
		except cx_Oracle.DatabaseError as exc: 
			error, = exc.args
			print("An exception occurred running query", error.message)
		print("Finished running query {}'th time".format((j*len(users))+(x+1)))
	#cursor.close()
	time.sleep(j* 10)
connection.close()