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import pytest
import psycopg
from psycopg.pq import TransactionStatus
pytestmark = pytest.mark.crdb_skip("2-phase commit")
def test_tpc_disabled(conn, pipeline):
val = int(conn.execute("show max_prepared_transactions").fetchone()[0])
if val:
pytest.skip("prepared transactions enabled")
conn.rollback()
conn.tpc_begin("x")
with pytest.raises(psycopg.NotSupportedError):
conn.tpc_prepare()
class TestTPC:
def test_tpc_commit(self, conn, tpc):
xid = conn.xid(1, "gtrid", "bqual")
assert conn.info.transaction_status == TransactionStatus.IDLE
conn.tpc_begin(xid)
assert conn.info.transaction_status == TransactionStatus.INTRANS
cur = conn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_commit')")
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
conn.tpc_prepare()
assert conn.info.transaction_status == TransactionStatus.IDLE
assert tpc.count_xacts() == 1
assert tpc.count_test_records() == 0
conn.tpc_commit()
assert conn.info.transaction_status == TransactionStatus.IDLE
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 1
def test_tpc_commit_one_phase(self, conn, tpc):
xid = conn.xid(1, "gtrid", "bqual")
assert conn.info.transaction_status == TransactionStatus.IDLE
conn.tpc_begin(xid)
assert conn.info.transaction_status == TransactionStatus.INTRANS
cur = conn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_commit_1p')")
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
conn.tpc_commit()
assert conn.info.transaction_status == TransactionStatus.IDLE
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 1
def test_tpc_commit_recovered(self, conn_cls, conn, dsn, tpc):
xid = conn.xid(1, "gtrid", "bqual")
assert conn.info.transaction_status == TransactionStatus.IDLE
conn.tpc_begin(xid)
assert conn.info.transaction_status == TransactionStatus.INTRANS
cur = conn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_commit_rec')")
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
conn.tpc_prepare()
conn.close()
assert tpc.count_xacts() == 1
assert tpc.count_test_records() == 0
with conn_cls.connect(dsn) as conn:
xid = conn.xid(1, "gtrid", "bqual")
conn.tpc_commit(xid)
assert conn.info.transaction_status == TransactionStatus.IDLE
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 1
def test_tpc_rollback(self, conn, tpc):
xid = conn.xid(1, "gtrid", "bqual")
assert conn.info.transaction_status == TransactionStatus.IDLE
conn.tpc_begin(xid)
assert conn.info.transaction_status == TransactionStatus.INTRANS
cur = conn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_rollback')")
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
conn.tpc_prepare()
assert conn.info.transaction_status == TransactionStatus.IDLE
assert tpc.count_xacts() == 1
assert tpc.count_test_records() == 0
conn.tpc_rollback()
assert conn.info.transaction_status == TransactionStatus.IDLE
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
def test_tpc_rollback_one_phase(self, conn, tpc):
xid = conn.xid(1, "gtrid", "bqual")
assert conn.info.transaction_status == TransactionStatus.IDLE
conn.tpc_begin(xid)
assert conn.info.transaction_status == TransactionStatus.INTRANS
cur = conn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_rollback_1p')")
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
conn.tpc_rollback()
assert conn.info.transaction_status == TransactionStatus.IDLE
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
def test_tpc_rollback_recovered(self, conn_cls, conn, dsn, tpc):
xid = conn.xid(1, "gtrid", "bqual")
assert conn.info.transaction_status == TransactionStatus.IDLE
conn.tpc_begin(xid)
assert conn.info.transaction_status == TransactionStatus.INTRANS
cur = conn.cursor()
cur.execute("insert into test_tpc values ('test_tpc_commit_rec')")
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
conn.tpc_prepare()
conn.close()
assert tpc.count_xacts() == 1
assert tpc.count_test_records() == 0
with conn_cls.connect(dsn) as conn:
xid = conn.xid(1, "gtrid", "bqual")
conn.tpc_rollback(xid)
assert conn.info.transaction_status == TransactionStatus.IDLE
assert tpc.count_xacts() == 0
assert tpc.count_test_records() == 0
def test_status_after_recover(self, conn, tpc):
assert conn.info.transaction_status == TransactionStatus.IDLE
conn.tpc_recover()
assert conn.info.transaction_status == TransactionStatus.IDLE
cur = conn.cursor()
cur.execute("select 1")
assert conn.info.transaction_status == TransactionStatus.INTRANS
conn.tpc_recover()
assert conn.info.transaction_status == TransactionStatus.INTRANS
def test_recovered_xids(self, conn, tpc):
# insert a few test xns
conn.autocommit = True
cur = conn.cursor()
cur.execute("begin; prepare transaction '1-foo'")
cur.execute("begin; prepare transaction '2-bar'")
# read the values to return
cur.execute(
"""
select gid, prepared, owner, database from pg_prepared_xacts
where database = %s
""",
(conn.info.dbname,),
)
okvals = cur.fetchall()
okvals.sort()
xids = conn.tpc_recover()
xids = [xid for xid in xids if xid.database == conn.info.dbname]
xids.sort(key=lambda x: x.gtrid)
# check the values returned
assert len(okvals) == len(xids)
for (xid, (gid, prepared, owner, database)) in zip(xids, okvals):
assert xid.gtrid == gid
assert xid.prepared == prepared
assert xid.owner == owner
assert xid.database == database
def test_xid_encoding(self, conn, tpc):
xid = conn.xid(42, "gtrid", "bqual")
conn.tpc_begin(xid)
conn.tpc_prepare()
cur = conn.cursor()
cur.execute(
"select gid from pg_prepared_xacts where database = %s",
(conn.info.dbname,),
)
assert "42_Z3RyaWQ=_YnF1YWw=" == cur.fetchone()[0]
@pytest.mark.parametrize(
"fid, gtrid, bqual",
[
(0, "", ""),
(42, "gtrid", "bqual"),
(0x7FFFFFFF, "x" * 64, "y" * 64),
],
)
def test_xid_roundtrip(self, conn_cls, conn, dsn, tpc, fid, gtrid, bqual):
xid = conn.xid(fid, gtrid, bqual)
conn.tpc_begin(xid)
conn.tpc_prepare()
conn.close()
with conn_cls.connect(dsn) as conn:
xids = [x for x in conn.tpc_recover() if x.database == conn.info.dbname]
assert len(xids) == 1
xid = xids[0]
conn.tpc_rollback(xid)
assert xid.format_id == fid
assert xid.gtrid == gtrid
assert xid.bqual == bqual
@pytest.mark.parametrize(
"tid",
[
"",
"hello, world!",
"x" * 199, # PostgreSQL's limit in transaction id length
],
)
def test_unparsed_roundtrip(self, conn_cls, conn, dsn, tpc, tid):
conn.tpc_begin(tid)
conn.tpc_prepare()
conn.close()
with conn_cls.connect(dsn) as conn:
xids = [x for x in conn.tpc_recover() if x.database == conn.info.dbname]
assert len(xids) == 1
xid = xids[0]
conn.tpc_rollback(xid)
assert xid.format_id is None
assert xid.gtrid == tid
assert xid.bqual is None
def test_xid_unicode(self, conn_cls, conn, dsn, tpc):
x1 = conn.xid(10, "uni", "code")
conn.tpc_begin(x1)
conn.tpc_prepare()
conn.close()
with conn_cls.connect(dsn) as conn:
xid = [x for x in conn.tpc_recover() if x.database == conn.info.dbname][0]
assert 10 == xid.format_id
assert "uni" == xid.gtrid
assert "code" == xid.bqual
def test_xid_unicode_unparsed(self, conn_cls, conn, dsn, tpc):
# We don't expect people shooting snowmen as transaction ids,
# so if something explodes in an encode error I don't mind.
# Let's just check unicode is accepted as type.
conn.execute("set client_encoding to utf8")
conn.commit()
conn.tpc_begin("transaction-id")
conn.tpc_prepare()
conn.close()
with conn_cls.connect(dsn) as conn:
xid = [x for x in conn.tpc_recover() if x.database == conn.info.dbname][0]
assert xid.format_id is None
assert xid.gtrid == "transaction-id"
assert xid.bqual is None
def test_cancel_fails_prepared(self, conn, tpc):
conn.tpc_begin("cancel")
conn.tpc_prepare()
with pytest.raises(psycopg.ProgrammingError):
conn.cancel()
def test_tpc_recover_non_dbapi_connection(self, conn_cls, conn, dsn, tpc):
conn.row_factory = psycopg.rows.dict_row
conn.tpc_begin("dict-connection")
conn.tpc_prepare()
conn.close()
with conn_cls.connect(dsn) as conn:
xids = conn.tpc_recover()
xid = [x for x in xids if x.database == conn.info.dbname][0]
assert xid.format_id is None
assert xid.gtrid == "dict-connection"
assert xid.bqual is None
class TestXidObject:
def test_xid_construction(self):
x1 = psycopg.Xid(74, "foo", "bar")
74 == x1.format_id
"foo" == x1.gtrid
"bar" == x1.bqual
def test_xid_from_string(self):
x2 = psycopg.Xid.from_string("42_Z3RyaWQ=_YnF1YWw=")
42 == x2.format_id
"gtrid" == x2.gtrid
"bqual" == x2.bqual
x3 = psycopg.Xid.from_string("99_xxx_yyy")
None is x3.format_id
"99_xxx_yyy" == x3.gtrid
None is x3.bqual
def test_xid_to_string(self):
x1 = psycopg.Xid.from_string("42_Z3RyaWQ=_YnF1YWw=")
str(x1) == "42_Z3RyaWQ=_YnF1YWw="
x2 = psycopg.Xid.from_string("99_xxx_yyy")
str(x2) == "99_xxx_yyy"
|
