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import pytest
import pymysql
from pymysql.tests import base
from pymysql.constants import CLIENT
class TestNextset(base.PyMySQLTestCase):
def test_nextset(self):
con = self.connect(
init_command='SELECT "bar"; SELECT "baz"',
client_flag=CLIENT.MULTI_STATEMENTS,
)
cur = con.cursor()
cur.execute("SELECT 1; SELECT 2;")
self.assertEqual([(1,)], list(cur))
r = cur.nextset()
self.assertTrue(r)
self.assertEqual([(2,)], list(cur))
self.assertIsNone(cur.nextset())
def test_skip_nextset(self):
cur = self.connect(client_flag=CLIENT.MULTI_STATEMENTS).cursor()
cur.execute("SELECT 1; SELECT 2;")
self.assertEqual([(1,)], list(cur))
cur.execute("SELECT 42")
self.assertEqual([(42,)], list(cur))
def test_nextset_error(self):
con = self.connect(client_flag=CLIENT.MULTI_STATEMENTS)
cur = con.cursor()
for i in range(3):
cur.execute("SELECT %s; xyzzy;", (i,))
self.assertEqual([(i,)], list(cur))
with self.assertRaises(pymysql.ProgrammingError):
cur.nextset()
self.assertEqual((), cur.fetchall())
def test_ok_and_next(self):
cur = self.connect(client_flag=CLIENT.MULTI_STATEMENTS).cursor()
cur.execute("SELECT 1; commit; SELECT 2;")
self.assertEqual([(1,)], list(cur))
self.assertTrue(cur.nextset())
self.assertTrue(cur.nextset())
self.assertEqual([(2,)], list(cur))
self.assertFalse(bool(cur.nextset()))
@pytest.mark.xfail
def test_multi_cursor(self):
con = self.connect(client_flag=CLIENT.MULTI_STATEMENTS)
cur1 = con.cursor()
cur2 = con.cursor()
cur1.execute("SELECT 1; SELECT 2;")
cur2.execute("SELECT 42")
self.assertEqual([(1,)], list(cur1))
self.assertEqual([(42,)], list(cur2))
r = cur1.nextset()
self.assertTrue(r)
self.assertEqual([(2,)], list(cur1))
self.assertIsNone(cur1.nextset())
def test_multi_statement_warnings(self):
con = self.connect(
init_command='SELECT "bar"; SELECT "baz"',
client_flag=CLIENT.MULTI_STATEMENTS,
)
cursor = con.cursor()
try:
cursor.execute("DROP TABLE IF EXISTS a; " "DROP TABLE IF EXISTS b;")
except TypeError:
self.fail()
# TODO: How about SSCursor and nextset?
# It's very hard to implement correctly...
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