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# Copyright 2021 Google LLC All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import base64
from collections import defaultdict
import datetime
import decimal
import time
from google.api_core.datetime_helpers import DatetimeWithNanoseconds
import pytest
from google.cloud import spanner_v1
from google.cloud._helpers import UTC
from google.cloud.spanner_dbapi.connection import Connection, connect
from google.cloud.spanner_dbapi.exceptions import (
OperationalError,
ProgrammingError,
RetryAborted,
)
from google.cloud.spanner_dbapi.parsed_statement import AutocommitDmlMode
from google.cloud.spanner_v1 import JsonObject
from google.cloud.spanner_v1 import gapic_version as package_version
from google.cloud.spanner_v1.database_sessions_manager import TransactionType
from tests._helpers import is_multiplexed_enabled
from . import _helpers
DATABASE_NAME = "dbapi-txn"
SPANNER_RPC_PREFIX = "/google.spanner.v1.Spanner/"
EXECUTE_BATCH_DML_METHOD = SPANNER_RPC_PREFIX + "ExecuteBatchDml"
COMMIT_METHOD = SPANNER_RPC_PREFIX + "Commit"
EXECUTE_SQL_METHOD = SPANNER_RPC_PREFIX + "ExecuteSql"
EXECUTE_STREAMING_SQL_METHOD = SPANNER_RPC_PREFIX + "ExecuteStreamingSql"
DDL = """CREATE TABLE contacts (
contact_id INT64,
first_name STRING(1024),
last_name STRING(1024),
email STRING(1024)
)
PRIMARY KEY (contact_id);
CREATE VIEW contacts_emails
SQL SECURITY INVOKER
AS
SELECT c.email
FROM contacts AS c;
CREATE TABLE all_types (
id int64,
col_bool bool,
col_bytes bytes(max),
col_date date,
col_float32 float32,
col_float64 float64,
col_int64 int64,
col_json json,
col_numeric numeric,
col_string string(max),
coL_timestamp timestamp,
) primary key (col_int64);
"""
DDL_STATEMENTS = [stmt.strip() for stmt in DDL.split(";") if stmt.strip()]
@pytest.fixture(scope="session")
def raw_database(shared_instance, database_operation_timeout, not_postgres):
database_id = _helpers.unique_id("dbapi-txn")
pool = spanner_v1.BurstyPool(labels={"testcase": "database_api"})
database = shared_instance.database(
database_id,
ddl_statements=DDL_STATEMENTS,
pool=pool,
enable_interceptors_in_tests=True,
)
op = database.create()
op.result(database_operation_timeout) # raises on failure / timeout.
yield database
database.drop()
class TestDbApi:
@staticmethod
def clear_table(transaction):
transaction.execute_update("DELETE FROM contacts WHERE true")
@pytest.fixture(scope="function")
def dbapi_database(self, raw_database):
# Resetting the count so that each test gives correct count of the api
# methods called during that test
raw_database._method_count_interceptor._counts = defaultdict(int)
raw_database.run_in_transaction(self.clear_table)
yield raw_database
raw_database.run_in_transaction(self.clear_table)
@pytest.fixture(autouse=True)
def init_connection(self, request, shared_instance, dbapi_database):
if "noautofixt" not in request.keywords:
self._conn = Connection(shared_instance, dbapi_database)
self._cursor = self._conn.cursor()
yield
if "noautofixt" not in request.keywords:
self._cursor.close()
self._conn.close()
def _execute_common_statements(self, cursor):
# execute several DML statements within one transaction
cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (1, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
cursor.execute(
"""
UPDATE contacts
SET first_name = 'updated-first-name'
WHERE first_name = 'first-name'
"""
)
cursor.execute(
"""
UPDATE contacts
SET email = 'test.email_updated@domen.ru'
WHERE email = 'test.email@domen.ru'
"""
)
return (
1,
"updated-first-name",
"last-name",
"test.email_updated@domen.ru",
)
@pytest.mark.parametrize("client_side", [True, False])
def test_commit(self, client_side):
"""Test committing a transaction with several statements."""
updated_row = self._execute_common_statements(self._cursor)
if client_side:
self._cursor.execute("""COMMIT""")
else:
self._conn.commit()
# read the resulting data from the database
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
self._conn.commit()
assert got_rows == [updated_row]
@pytest.mark.skipif(
_helpers.USE_EMULATOR,
reason="Emulator does not support multiple parallel transactions.",
)
def test_commit_exception(self):
"""Test that if exception during commit method is caught, then
subsequent operations on same Cursor and Connection object works
properly."""
if is_multiplexed_enabled(transaction_type=TransactionType.READ_WRITE):
pytest.skip(
"Mutiplexed session can't be deleted and this test relies on session deletion."
)
self._execute_common_statements(self._cursor)
# deleting the session to fail the commit
self._conn._session.delete()
try:
self._conn.commit()
except Exception:
pass
# Testing that the connection and Cursor are in proper state post commit
# and a new transaction is started
updated_row = self._execute_common_statements(self._cursor)
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
self._conn.commit()
assert got_rows == [updated_row]
@pytest.mark.skipif(
_helpers.USE_EMULATOR,
reason="Emulator does not support multiple parallel transactions.",
)
def test_rollback_exception(self):
"""Test that if exception during rollback method is caught, then
subsequent operations on same Cursor and Connection object works
properly."""
self._execute_common_statements(self._cursor)
# deleting the session to fail the rollback
self._conn._session.delete()
try:
self._conn.rollback()
except Exception:
pass
# Testing that the connection and Cursor are in proper state post
# exception in rollback and a new transaction is started
updated_row = self._execute_common_statements(self._cursor)
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
self._conn.commit()
assert got_rows == [updated_row]
def test_cursor_execute_exception(self):
"""Test that if exception in Cursor's execute method is caught when
Connection is not in autocommit mode, then subsequent operations on
same Cursor and Connection object works properly."""
updated_row = self._execute_common_statements(self._cursor)
try:
self._cursor.execute("SELECT * FROM unknown_table")
except Exception:
pass
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
self._conn.commit()
assert got_rows == [updated_row]
# Testing that the connection and Cursor are in proper state post commit
# and a new transaction is started
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
self._conn.commit()
assert got_rows == [updated_row]
def test_cursor_execute_exception_autocommit(self):
"""Test that if exception in Cursor's execute method is caught when
Connection is in autocommit mode, then subsequent operations on
same Cursor and Connection object works properly."""
self._conn.autocommit = True
updated_row = self._execute_common_statements(self._cursor)
try:
self._cursor.execute("SELECT * FROM unknown_table")
except Exception:
pass
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
assert got_rows == [updated_row]
def test_cursor_execute_exception_begin_client_side(self):
"""Test that if exception in Cursor's execute method is caught when
beginning a transaction using client side statement, then subsequent
operations on same Cursor and Connection object works properly."""
self._conn.autocommit = True
self._cursor.execute("begin transaction")
updated_row = self._execute_common_statements(self._cursor)
try:
self._cursor.execute("SELECT * FROM unknown_table")
except Exception:
pass
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
self._conn.commit()
assert got_rows == [updated_row]
# Testing that the connection and Cursor are in proper state post commit
self._conn.autocommit = False
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
self._conn.commit()
assert got_rows == [updated_row]
@pytest.mark.noautofixt
def test_begin_client_side(self, shared_instance, dbapi_database):
"""Test beginning a transaction using client side statement,
where connection is in autocommit mode."""
conn1 = Connection(shared_instance, dbapi_database)
conn1.autocommit = True
cursor1 = conn1.cursor()
cursor1.execute("begin transaction")
updated_row = self._execute_common_statements(cursor1)
assert conn1._transaction_begin_marked is True
conn1.commit()
assert conn1._transaction_begin_marked is False
cursor1.close()
conn1.close()
# As the connection conn1 is committed a new connection should see its results
conn3 = Connection(shared_instance, dbapi_database)
cursor3 = conn3.cursor()
cursor3.execute("SELECT * FROM contacts")
got_rows = cursor3.fetchall()
conn3.commit()
cursor3.close()
conn3.close()
assert got_rows == [updated_row]
def test_noop_sql_statements(self, dbapi_database):
"""Test beginning and then committing a transaction is a Noop"""
dbapi_database._method_count_interceptor.reset()
self._cursor.execute("begin transaction")
self._cursor.execute("commit transaction")
assert dbapi_database._method_count_interceptor._counts == {}
self._cursor.execute("SELECT * FROM contacts")
self._conn.commit()
assert self._cursor.fetchall() == []
"""Test beginning and then rolling back a transaction is a Noop"""
dbapi_database._method_count_interceptor.reset()
self._cursor.execute("begin transaction")
self._cursor.execute("rollback transaction")
assert dbapi_database._method_count_interceptor._counts == {}
self._cursor.execute("SELECT * FROM contacts")
assert self._cursor.fetchall() == []
self._conn.commit()
dbapi_database._method_count_interceptor.reset()
self._cursor.execute("start batch dml")
self._cursor.execute("run batch")
assert dbapi_database._method_count_interceptor._counts == {}
def test_read_and_commit_timestamps(self):
"""Test COMMIT_TIMESTAMP is not available after read statement and
READ_TIMESTAMP is not available after write statement in autocommit
mode."""
self._conn.autocommit = True
self._cursor.execute("SELECT * FROM contacts")
self._cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (1, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
self._cursor.execute("SHOW VARIABLE COMMIT_TIMESTAMP")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 1
self._cursor.execute("SHOW VARIABLE READ_TIMESTAMP")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 0
self._cursor.execute("SELECT * FROM contacts")
self._cursor.execute("SHOW VARIABLE COMMIT_TIMESTAMP")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 0
self._cursor.execute("SHOW VARIABLE READ_TIMESTAMP")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 1
def test_commit_timestamp_client_side_transaction(self):
"""Test executing SHOW_COMMIT_TIMESTAMP client side statement in a
transaction."""
self._cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (1, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
self._cursor.execute("SHOW VARIABLE COMMIT_TIMESTAMP")
got_rows = self._cursor.fetchall()
# As the connection is not committed we will get 0 rows
assert len(got_rows) == 0
assert len(self._cursor.description) == 1
self._cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
self._conn.commit()
self._cursor.execute("SHOW VARIABLE COMMIT_TIMESTAMP")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 1
assert len(got_rows[0]) == 1
assert len(self._cursor.description) == 1
assert self._cursor.description[0].name == "SHOW_COMMIT_TIMESTAMP"
assert isinstance(got_rows[0][0], DatetimeWithNanoseconds)
def test_commit_timestamp_client_side_autocommit(self):
"""Test executing SHOW_COMMIT_TIMESTAMP client side statement in a
transaction when connection is in autocommit mode."""
self._conn.autocommit = True
self._cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
self._cursor.execute("SHOW VARIABLE COMMIT_TIMESTAMP")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 1
assert len(got_rows[0]) == 1
assert len(self._cursor.description) == 1
assert self._cursor.description[0].name == "SHOW_COMMIT_TIMESTAMP"
assert isinstance(got_rows[0][0], DatetimeWithNanoseconds)
def test_read_timestamp_client_side(self):
"""Test executing SHOW_READ_TIMESTAMP client side statement in a
transaction."""
self._conn.read_only = True
self._cursor.execute("SELECT * FROM contacts")
assert self._cursor.fetchall() == []
self._cursor.execute("SHOW VARIABLE READ_TIMESTAMP")
read_timestamp_query_result_1 = self._cursor.fetchall()
self._cursor.execute("SELECT * FROM contacts")
assert self._cursor.fetchall() == []
self._cursor.execute("SHOW VARIABLE READ_TIMESTAMP")
read_timestamp_query_result_2 = self._cursor.fetchall()
self._conn.commit()
self._cursor.execute("SHOW VARIABLE READ_TIMESTAMP")
read_timestamp_query_result_3 = self._cursor.fetchall()
assert len(self._cursor.description) == 1
assert self._cursor.description[0].name == "SHOW_READ_TIMESTAMP"
assert (
read_timestamp_query_result_1
== read_timestamp_query_result_2
== read_timestamp_query_result_3
)
assert len(read_timestamp_query_result_1) == 1
assert len(read_timestamp_query_result_1[0]) == 1
assert isinstance(read_timestamp_query_result_1[0][0], DatetimeWithNanoseconds)
self._cursor.execute("SELECT * FROM contacts")
self._cursor.execute("SHOW VARIABLE READ_TIMESTAMP")
read_timestamp_query_result_4 = self._cursor.fetchall()
self._conn.commit()
assert read_timestamp_query_result_1 != read_timestamp_query_result_4
def test_read_timestamp_client_side_autocommit(self):
"""Test executing SHOW_READ_TIMESTAMP client side statement in a
transaction when connection is in autocommit mode."""
self._conn.autocommit = True
self._cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
self._conn.read_only = True
self._cursor.execute("SELECT * FROM contacts")
assert self._cursor.fetchall() == [
(2, "first-name", "last-name", "test.email@domen.ru")
]
self._cursor.execute("SHOW VARIABLE READ_TIMESTAMP")
read_timestamp_query_result_1 = self._cursor.fetchall()
assert len(read_timestamp_query_result_1) == 1
assert len(read_timestamp_query_result_1[0]) == 1
assert len(self._cursor.description) == 1
assert self._cursor.description[0].name == "SHOW_READ_TIMESTAMP"
assert isinstance(read_timestamp_query_result_1[0][0], DatetimeWithNanoseconds)
self._conn.read_only = False
self._insert_row(3)
self._conn.read_only = True
self._cursor.execute("SELECT * FROM contacts")
self._cursor.execute("SHOW VARIABLE READ_TIMESTAMP")
read_timestamp_query_result_2 = self._cursor.fetchall()
assert read_timestamp_query_result_1 != read_timestamp_query_result_2
@pytest.mark.parametrize("auto_commit", [False, True])
def test_batch_dml(self, auto_commit, dbapi_database):
"""Test batch dml."""
method_count_interceptor = dbapi_database._method_count_interceptor
method_count_interceptor.reset()
if auto_commit:
self._conn.autocommit = True
self._insert_row(1)
self._cursor.execute("start batch dml")
self._insert_row(2)
self._insert_row(3)
self._cursor.execute("run batch")
self._insert_row(4)
# Test starting another dml batch in same transaction works
self._cursor.execute("start batch dml")
self._insert_row(5)
self._insert_row(6)
self._cursor.execute("run batch")
if not auto_commit:
self._conn.commit()
self._cursor.execute("SELECT * FROM contacts")
assert (
self._cursor.fetchall().sort()
== (
[
(1, "first-name-1", "last-name-1", "test.email@domen.ru"),
(2, "first-name-2", "last-name-2", "test.email@domen.ru"),
(3, "first-name-3", "last-name-3", "test.email@domen.ru"),
(4, "first-name-4", "last-name-4", "test.email@domen.ru"),
(5, "first-name-5", "last-name-5", "test.email@domen.ru"),
(6, "first-name-6", "last-name-6", "test.email@domen.ru"),
]
).sort()
)
# Test starting another dml batch in same connection post commit works
self._cursor.execute("start batch dml")
self._insert_row(7)
self._insert_row(8)
self._cursor.execute("run batch")
self._insert_row(9)
if not auto_commit:
self._conn.commit()
self._cursor.execute("SELECT * FROM contacts")
assert len(self._cursor.fetchall()) == 9
# Test that ExecuteBatchDml rpc is called
assert method_count_interceptor._counts[EXECUTE_BATCH_DML_METHOD] == 3
def test_abort_batch_dml(self):
"""Test abort batch dml."""
self._cursor.execute("start batch dml")
self._insert_row(1)
self._insert_row(2)
self._cursor.execute("abort batch")
self._insert_row(3)
self._conn.commit()
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 1
assert got_rows == [(3, "first-name-3", "last-name-3", "test.email@domen.ru")]
def test_batch_dml_invalid_statements(self):
"""Test batch dml having invalid statements."""
# Test first statement in batch is invalid
self._cursor.execute("start batch dml")
self._cursor.execute(
"""
INSERT INTO unknown_table (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
self._insert_row(1)
self._insert_row(2)
with pytest.raises(OperationalError):
self._cursor.execute("run batch")
# Test middle statement in batch is invalid
self._cursor.execute("start batch dml")
self._insert_row(1)
self._cursor.execute(
"""
INSERT INTO unknown_table (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
self._insert_row(2)
with pytest.raises(OperationalError):
self._cursor.execute("run batch")
# Test last statement in batch is invalid
self._cursor.execute("start batch dml")
self._insert_row(1)
self._insert_row(2)
self._cursor.execute(
"""
INSERT INTO unknown_table (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
with pytest.raises(OperationalError):
self._cursor.execute("run batch")
def test_partitioned_query(self):
"""Test partition query works in read-only mode."""
self._cursor.execute("start batch dml")
for i in range(1, 11):
self._insert_row(i)
self._cursor.execute("run batch")
self._conn.commit()
self._conn.read_only = True
self._cursor.execute("PARTITION SELECT * FROM contacts")
partition_id_rows = self._cursor.fetchall()
assert len(partition_id_rows) > 0
rows = []
for partition_id_row in partition_id_rows:
self._cursor.execute("RUN PARTITION " + partition_id_row[0])
rows = rows + self._cursor.fetchall()
assert len(rows) == 10
self._conn.commit()
def test_partitioned_query_in_rw_transaction(self):
"""Test partition query throws exception when connection is not in
read-only mode and neither in auto-commit mode."""
self._cursor.execute("start batch dml")
for i in range(1, 11):
self._insert_row(i)
self._cursor.execute("run batch")
self._conn.commit()
with pytest.raises(ProgrammingError):
self._cursor.execute("PARTITION SELECT * FROM contacts")
def test_partitioned_query_with_dml_query(self):
"""Test partition query throws exception when sql query is a DML query."""
self._cursor.execute("start batch dml")
for i in range(1, 11):
self._insert_row(i)
self._cursor.execute("run batch")
self._conn.commit()
self._conn.read_only = True
with pytest.raises(ProgrammingError):
self._cursor.execute(
"""
PARTITION INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (1111, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
def test_partitioned_query_in_autocommit_mode(self):
"""Test partition query works when connection is not in read-only mode
but is in auto-commit mode."""
self._cursor.execute("start batch dml")
for i in range(1, 11):
self._insert_row(i)
self._cursor.execute("run batch")
self._conn.commit()
self._conn.autocommit = True
self._cursor.execute("PARTITION SELECT * FROM contacts")
partition_id_rows = self._cursor.fetchall()
assert len(partition_id_rows) > 0
rows = []
for partition_id_row in partition_id_rows:
self._cursor.execute("RUN PARTITION " + partition_id_row[0])
rows = rows + self._cursor.fetchall()
assert len(rows) == 10
self._conn.commit()
def test_partitioned_query_with_client_transaction_started(self):
"""Test partition query throws exception when connection is in
auto-commit mode but transaction started using client side statement."""
self._cursor.execute("start batch dml")
for i in range(1, 11):
self._insert_row(i)
self._cursor.execute("run batch")
self._conn.commit()
self._conn.autocommit = True
self._cursor.execute("begin transaction")
with pytest.raises(ProgrammingError):
self._cursor.execute("PARTITION SELECT * FROM contacts")
def test_run_partitioned_query(self):
"""Test run partitioned query works in read-only mode."""
self._cursor.execute("start batch dml")
for i in range(1, 11):
self._insert_row(i)
self._cursor.execute("run batch")
self._conn.commit()
self._conn.read_only = True
self._cursor.execute("RUN PARTITIONED QUERY SELECT * FROM contacts")
assert self._cursor.description is not None
assert self._cursor.rowcount == -1
rows = self._cursor.fetchall()
assert len(rows) == 10
self._conn.commit()
def test_partitioned_dml_query(self):
"""Test partitioned_dml query works in autocommit mode."""
self._cursor.execute("start batch dml")
for i in range(1, 11):
self._insert_row(i)
self._cursor.execute("run batch")
self._conn.commit()
self._conn.autocommit = True
self._cursor.execute("set autocommit_dml_mode = PARTITIONED_NON_ATOMIC")
self._cursor.execute("DELETE FROM contacts WHERE contact_id > 3")
assert self._cursor.rowcount == 7
self._cursor.execute("set autocommit_dml_mode = TRANSACTIONAL")
assert self._conn.autocommit_dml_mode == AutocommitDmlMode.TRANSACTIONAL
self._conn.autocommit = False
# Test changing autocommit_dml_mode is not allowed when connection is in autocommit mode
with pytest.raises(ProgrammingError):
self._cursor.execute("set autocommit_dml_mode = PARTITIONED_NON_ATOMIC")
def _insert_row(self, i):
self._cursor.execute(
f"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES ({i}, 'first-name-{i}', 'last-name-{i}', 'test.email@domen.ru')
"""
)
def test_commit_abort_retry(self, dbapi_database):
"""Test that when commit failed with Abort exception, then the retry
succeeds with transaction having insert as well as query type of
statements along with batch dml statements.
We are trying to test all types of statements like execute, executemany,
fetchone, fetchmany, fetchall"""
method_count_interceptor = dbapi_database._method_count_interceptor
method_count_interceptor.reset()
# called 2 times
self._insert_row(1)
# called 2 times
self._cursor.execute("SELECT * FROM contacts")
self._cursor.fetchall()
self._cursor.execute("start batch dml")
self._insert_row(2)
self._insert_row(3)
# called 2 times for batch dml rpc
self._cursor.execute("run batch")
row_data = [
(4, "first-name4", "last-name4", "test.email4@example.com"),
(5, "first-name5", "last-name5", "test.email5@example.com"),
]
# called 2 times for batch dml rpc
self._cursor.executemany(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (%s, %s, %s, %s)
""",
row_data,
)
# called 2 times and as this would make 3 execute streaming sql calls
# so total 6 calls
self._cursor.executemany(
"""SELECT * FROM contacts WHERE contact_id = %s""",
((1,), (2,), (3,)),
)
self._cursor.fetchone()
self._cursor.fetchmany(2)
dbapi_database._method_abort_interceptor.set_method_to_abort(
COMMIT_METHOD, self._conn
)
# called (at least) 2 times
self._conn.commit()
dbapi_database._method_abort_interceptor.reset()
# Verify the number of calls.
# We don't know the exact number of calls, as Spanner could also
# abort the transaction.
assert method_count_interceptor._counts[COMMIT_METHOD] >= 2
assert method_count_interceptor._counts[EXECUTE_BATCH_DML_METHOD] >= 4
assert method_count_interceptor._counts[EXECUTE_STREAMING_SQL_METHOD] >= 10
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 5
@pytest.mark.skipif(
_helpers.USE_EMULATOR,
reason="Emulator does not support concurrent transactions.",
)
def test_retry_aborted_exception(self, shared_instance, dbapi_database):
"""Test that retry fails with RetryAborted error when rows are updated during retry."""
conn1 = Connection(shared_instance, dbapi_database)
cursor1 = conn1.cursor()
cursor1.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (1, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
conn1.commit()
cursor1.execute("SELECT * FROM contacts")
cursor1.fetchall()
conn2 = Connection(shared_instance, dbapi_database)
cursor2 = conn2.cursor()
cursor2.execute(
"""
UPDATE contacts
SET email = 'test.email_updated@domen.ru'
WHERE contact_id = 1
"""
)
conn2.commit()
dbapi_database._method_abort_interceptor.set_method_to_abort(
COMMIT_METHOD, conn1
)
with pytest.raises(RetryAborted):
conn1.commit()
dbapi_database._method_abort_interceptor.reset()
def test_execute_sql_abort_retry_multiple_times(self, dbapi_database):
"""Test that when execute sql failed 2 times with Abort exception, then
the retry succeeds 3rd time."""
method_count_interceptor = dbapi_database._method_count_interceptor
method_count_interceptor.reset()
self._cursor.execute("start batch dml")
self._insert_row(1)
self._insert_row(2)
self._cursor.execute("run batch")
# aborting method 2 times before succeeding
dbapi_database._method_abort_interceptor.set_method_to_abort(
EXECUTE_STREAMING_SQL_METHOD, self._conn, 2
)
self._cursor.execute("SELECT * FROM contacts")
self._cursor.fetchmany(2)
dbapi_database._method_abort_interceptor.reset()
self._conn.commit()
# Check that all RPCs except commit should be called at least 3 times
# We don't know the exact number of attempts, as the transaction could
# also be aborted by Spanner (and not only the test interceptor).
assert method_count_interceptor._counts[COMMIT_METHOD] >= 1
assert method_count_interceptor._counts[EXECUTE_BATCH_DML_METHOD] >= 3
assert method_count_interceptor._counts[EXECUTE_STREAMING_SQL_METHOD] >= 3
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 2
def test_execute_batch_dml_abort_retry(self, dbapi_database):
"""Test that when any execute batch dml failed with Abort exception,
then the retry succeeds with transaction having insert as well as query
type of statements along with batch dml statements."""
method_count_interceptor = dbapi_database._method_count_interceptor
method_count_interceptor.reset()
# called 3 times
self._insert_row(1)
# called 3 times
self._cursor.execute("SELECT * FROM contacts")
self._cursor.fetchall()
self._cursor.execute("start batch dml")
self._insert_row(2)
self._insert_row(3)
dbapi_database._method_abort_interceptor.set_method_to_abort(
EXECUTE_BATCH_DML_METHOD, self._conn, 2
)
# called 3 times
self._cursor.execute("run batch")
dbapi_database._method_abort_interceptor.reset()
self._conn.commit()
assert method_count_interceptor._counts[COMMIT_METHOD] >= 1
assert method_count_interceptor._counts[EXECUTE_BATCH_DML_METHOD] >= 3
assert method_count_interceptor._counts[EXECUTE_STREAMING_SQL_METHOD] >= 6
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 3
def test_multiple_aborts_in_transaction(self, dbapi_database):
"""Test that when there are multiple Abort exceptions in a transaction
on different statements, then the retry succeeds."""
method_count_interceptor = dbapi_database._method_count_interceptor
method_count_interceptor.reset()
# called at least 3 times
self._insert_row(1)
dbapi_database._method_abort_interceptor.set_method_to_abort(
EXECUTE_STREAMING_SQL_METHOD, self._conn
)
# called at least 3 times
self._cursor.execute("SELECT * FROM contacts")
dbapi_database._method_abort_interceptor.reset()
self._cursor.fetchall()
# called at least 2 times
self._insert_row(2)
# called at least 2 times
self._cursor.execute("SELECT * FROM contacts")
self._cursor.fetchone()
dbapi_database._method_abort_interceptor.set_method_to_abort(
COMMIT_METHOD, self._conn
)
# called at least 2 times
self._conn.commit()
dbapi_database._method_abort_interceptor.reset()
assert method_count_interceptor._counts[COMMIT_METHOD] >= 2
assert method_count_interceptor._counts[EXECUTE_STREAMING_SQL_METHOD] >= 10
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 2
def test_consecutive_aborted_transactions(self, dbapi_database):
"""Test 2 consecutive transactions with Abort exceptions on the same
connection works."""
method_count_interceptor = dbapi_database._method_count_interceptor
method_count_interceptor.reset()
self._insert_row(1)
self._insert_row(2)
self._cursor.execute("SELECT * FROM contacts")
self._cursor.fetchall()
dbapi_database._method_abort_interceptor.set_method_to_abort(
COMMIT_METHOD, self._conn
)
self._conn.commit()
dbapi_database._method_abort_interceptor.reset()
assert method_count_interceptor._counts[COMMIT_METHOD] >= 2
assert method_count_interceptor._counts[EXECUTE_STREAMING_SQL_METHOD] >= 6
method_count_interceptor = dbapi_database._method_count_interceptor
method_count_interceptor.reset()
self._insert_row(3)
self._insert_row(4)
self._cursor.execute("SELECT * FROM contacts")
self._cursor.fetchall()
dbapi_database._method_abort_interceptor.set_method_to_abort(
COMMIT_METHOD, self._conn
)
self._conn.commit()
dbapi_database._method_abort_interceptor.reset()
assert method_count_interceptor._counts[COMMIT_METHOD] >= 2
assert method_count_interceptor._counts[EXECUTE_STREAMING_SQL_METHOD] >= 6
self._cursor.execute("SELECT * FROM contacts")
got_rows = self._cursor.fetchall()
assert len(got_rows) == 4
def test_abort_retry_multiple_cursors(self, dbapi_database):
"""Test that retry works when multiple cursors are involved in the transaction."""
self._insert_row(1)
self._insert_row(2)
self._insert_row(3)
self._insert_row(4)
self._conn.commit()
cur1 = self._conn.cursor()
cur1.execute("SELECT * FROM contacts WHERE contact_id IN (1, 2)")
cur2 = self._conn.cursor()
cur2.execute("SELECT * FROM contacts WHERE contact_id IN (3, 4)")
row1 = cur1.fetchone()
row2 = cur2.fetchone()
row3 = cur1.fetchone()
row4 = cur2.fetchone()
dbapi_database._method_abort_interceptor.set_method_to_abort(
COMMIT_METHOD, self._conn
)
self._conn.commit()
dbapi_database._method_abort_interceptor.reset()
assert set([row1, row3]) == set(
[
(1, "first-name-1", "last-name-1", "test.email@domen.ru"),
(2, "first-name-2", "last-name-2", "test.email@domen.ru"),
]
)
assert set([row2, row4]) == set(
[
(3, "first-name-3", "last-name-3", "test.email@domen.ru"),
(4, "first-name-4", "last-name-4", "test.email@domen.ru"),
]
)
def test_begin_success_post_commit(self):
"""Test beginning a new transaction post commiting an existing transaction
is possible on a connection, when connection is in autocommit mode."""
want_row = (2, "first-name", "last-name", "test.email@domen.ru")
self._conn.autocommit = True
self._cursor.execute("begin transaction")
self._cursor.execute(
"""
INSERT INTO contacts (contact_id, first_name, last_name, email)
VALUES (2, 'first-name', 'last-name', 'test.email@domen.ru')
"""
)
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