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from sqlalchemy import bindparam
from sqlalchemy import Column
from sqlalchemy import Integer
from sqlalchemy import select
from sqlalchemy import String
from sqlalchemy import Table
from sqlalchemy import testing
from sqlalchemy import text
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
class RowCountTest(fixtures.TablesTest):
"""test rowcount functionality"""
__requires__ = ("sane_rowcount",)
__backend__ = True
@classmethod
def define_tables(cls, metadata):
Table(
"employees",
metadata,
Column(
"employee_id",
Integer,
autoincrement=False,
primary_key=True,
),
Column("name", String(50)),
Column("department", String(1)),
)
@classmethod
def insert_data(cls, connection):
cls.data = data = [
("Angela", "A"),
("Andrew", "A"),
("Anand", "A"),
("Bob", "B"),
("Bobette", "B"),
("Buffy", "B"),
("Charlie", "C"),
("Cynthia", "C"),
("Chris", "C"),
]
employees_table = cls.tables.employees
connection.execute(
employees_table.insert(),
[
{"employee_id": i, "name": n, "department": d}
for i, (n, d) in enumerate(data)
],
)
def test_basic(self, connection):
employees_table = self.tables.employees
s = select(
employees_table.c.name, employees_table.c.department
).order_by(employees_table.c.employee_id)
rows = connection.execute(s).fetchall()
eq_(rows, self.data)
def test_update_rowcount1(self, connection):
employees_table = self.tables.employees
# WHERE matches 3, 3 rows changed
department = employees_table.c.department
r = connection.execute(
employees_table.update().where(department == "C"),
{"department": "Z"},
)
assert r.rowcount == 3
def test_update_rowcount2(self, connection):
employees_table = self.tables.employees
# WHERE matches 3, 0 rows changed
department = employees_table.c.department
r = connection.execute(
employees_table.update().where(department == "C"),
{"department": "C"},
)
eq_(r.rowcount, 3)
@testing.requires.sane_rowcount_w_returning
def test_update_rowcount_return_defaults(self, connection):
employees_table = self.tables.employees
department = employees_table.c.department
stmt = (
employees_table.update()
.where(department == "C")
.values(name=employees_table.c.department + "Z")
.return_defaults()
)
r = connection.execute(stmt)
eq_(r.rowcount, 3)
def test_raw_sql_rowcount(self, connection):
# test issue #3622, make sure eager rowcount is called for text
result = connection.exec_driver_sql(
"update employees set department='Z' where department='C'"
)
eq_(result.rowcount, 3)
def test_text_rowcount(self, connection):
# test issue #3622, make sure eager rowcount is called for text
result = connection.execute(
text("update employees set department='Z' " "where department='C'")
)
eq_(result.rowcount, 3)
def test_delete_rowcount(self, connection):
employees_table = self.tables.employees
# WHERE matches 3, 3 rows deleted
department = employees_table.c.department
r = connection.execute(
employees_table.delete().where(department == "C")
)
eq_(r.rowcount, 3)
@testing.requires.sane_multi_rowcount
def test_multi_update_rowcount(self, connection):
employees_table = self.tables.employees
stmt = (
employees_table.update()
.where(employees_table.c.name == bindparam("emp_name"))
.values(department="C")
)
r = connection.execute(
stmt,
[
{"emp_name": "Bob"},
{"emp_name": "Cynthia"},
{"emp_name": "nonexistent"},
],
)
eq_(r.rowcount, 2)
@testing.requires.sane_multi_rowcount
def test_multi_delete_rowcount(self, connection):
employees_table = self.tables.employees
stmt = employees_table.delete().where(
employees_table.c.name == bindparam("emp_name")
)
r = connection.execute(
stmt,
[
{"emp_name": "Bob"},
{"emp_name": "Cynthia"},
{"emp_name": "nonexistent"},
],
)
eq_(r.rowcount, 2)
|
