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Merge pull request #9766 from matrix-org/rav/drop_py35

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Require py36, Postgres 9.6, and sqlite 3.22
This commit is contained in:
Richard van der Hoff 2021-04-08 19:29:03 +01:00 committed by GitHub
commit 64f4f506c5
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13 changed files with 24 additions and 111 deletions
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2
.buildkite/scripts/test_old_deps.sh
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@ -1,6 +1,6 @@
#!/usr/bin/env bash
# this script is run by buildkite in a plain `xenial` container; it installs the
# this script is run by buildkite in a plain `bionic` container; it installs the
# minimal requirements for tox and hands over to the py3-old tox environment.
set -ex

1
changelog.d/9766.feature Normal file
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@ -0,0 +1 @@
Synapse now requires Python 3.6 or later. It also requires Postgres 9.6 or later or SQLite 3.22 or later.

2
scripts-dev/build_debian_packages
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@ -18,11 +18,9 @@ import threading
from concurrent.futures import ThreadPoolExecutor
DISTS = (
"debian:stretch",
"debian:buster",
"debian:bullseye",
"debian:sid",
"ubuntu:xenial",
"ubuntu:bionic",
"ubuntu:focal",
"ubuntu:groovy",

2
setup.py
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@ -123,7 +123,7 @@ setup(
zip_safe=False,
long_description=long_description,
long_description_content_type="text/x-rst",
python_requires="~=3.5",
python_requires="~=3.6",
classifiers=[
"Development Status :: 5 - Production/Stable",
"Topic :: Communications :: Chat",

55
synapse/storage/database.py
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@ -2059,69 +2059,18 @@ def make_in_list_sql_clause(
KV = TypeVar("KV")
def make_tuple_comparison_clause(
database_engine: BaseDatabaseEngine, keys: List[Tuple[str, KV]]
) -> Tuple[str, List[KV]]:
def make_tuple_comparison_clause(keys: List[Tuple[str, KV]]) -> Tuple[str, List[KV]]:
"""Returns a tuple comparison SQL clause
Depending what the SQL engine supports, builds a SQL clause that looks like either
"(a, b) > (?, ?)", or "(a > ?) OR (a == ? AND b > ?)".
Builds a SQL clause that looks like "(a, b) > (?, ?)"
Args:
database_engine
keys: A set of (column, value) pairs to be compared.
Returns:
A tuple of SQL query and the args
"""
if database_engine.supports_tuple_comparison:
return (
"(%s) > (%s)" % (",".join(k[0] for k in keys), ",".join("?" for _ in keys)),
[k[1] for k in keys],
)
# we want to build a clause
# (a > ?) OR
# (a == ? AND b > ?) OR
# (a == ? AND b == ? AND c > ?)
# ...
# (a == ? AND b == ? AND ... AND z > ?)
#
# or, equivalently:
#
# (a > ? OR (a == ? AND
# (b > ? OR (b == ? AND
# ...
# (y > ? OR (y == ? AND
# z > ?
# ))
# ...
# ))
# ))
#
# which itself is equivalent to (and apparently easier for the query optimiser):
#
# (a >= ? AND (a > ? OR
# (b >= ? AND (b > ? OR
# ...
# (y >= ? AND (y > ? OR
# z > ?
# ))
# ...
# ))
# ))
#
#
clause = ""
args = [] # type: List[KV]
for k, v in keys[:-1]:
clause = clause + "(%s >= ? AND (%s > ? OR " % (k, k)
args.extend([v, v])
(k, v) = keys[-1]
clause += "%s > ?" % (k,)
args.append(v)
clause += "))" * (len(keys) - 1)
return clause, args

1
synapse/storage/databases/main/client_ips.py
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@ -298,7 +298,6 @@ class ClientIpBackgroundUpdateStore(SQLBaseStore):
# times, which is fine.
where_clause, where_args = make_tuple_comparison_clause(
self.database_engine,
[("user_id", last_user_id), ("device_id", last_device_id)],
)

2
synapse/storage/databases/main/devices.py
View File

@ -985,7 +985,7 @@ class DeviceBackgroundUpdateStore(SQLBaseStore):
def _txn(txn):
clause, args = make_tuple_comparison_clause(
self.db_pool.engine, [(x, last_row[x]) for x in KEY_COLS]
[(x, last_row[x]) for x in KEY_COLS]
)
sql = """
SELECT stream_id, destination, user_id, device_id, MAX(ts) AS ts

1
synapse/storage/databases/main/events_bg_updates.py
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@ -838,7 +838,6 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
# We want to do a `(topological_ordering, stream_ordering) > (?,?)`
# comparison, but that is not supported on older SQLite versions
tuple_clause, tuple_args = make_tuple_comparison_clause(
self.database_engine,
[
("events.room_id", last_room_id),
("topological_ordering", last_depth),

8
synapse/storage/engines/_base.py
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@ -42,14 +42,6 @@ class BaseDatabaseEngine(Generic[ConnectionType], metaclass=abc.ABCMeta):
"""
...
@property
@abc.abstractmethod
def supports_tuple_comparison(self) -> bool:
"""
Do we support comparing tuples, i.e. `(a, b) > (c, d)`?
"""
...
@property
@abc.abstractmethod
def supports_using_any_list(self) -> bool:

11
synapse/storage/engines/postgres.py
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@ -47,8 +47,8 @@ class PostgresEngine(BaseDatabaseEngine):
self._version = db_conn.server_version
# Are we on a supported PostgreSQL version?
if not allow_outdated_version and self._version < 90500:
raise RuntimeError("Synapse requires PostgreSQL 9.5+ or above.")
if not allow_outdated_version and self._version < 90600:
raise RuntimeError("Synapse requires PostgreSQL 9.6 or above.")
with db_conn.cursor() as txn:
txn.execute("SHOW SERVER_ENCODING")
@ -129,13 +129,6 @@ class PostgresEngine(BaseDatabaseEngine):
"""
return True
@property
def supports_tuple_comparison(self):
"""
Do we support comparing tuples, i.e. `(a, b) > (c, d)`?
"""
return True
@property
def supports_using_any_list(self):
"""Do we support using `a = ANY(?)` and passing a list"""

15
synapse/storage/engines/sqlite.py
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@ -56,14 +56,6 @@ class Sqlite3Engine(BaseDatabaseEngine["sqlite3.Connection"]):
"""
return self.module.sqlite_version_info >= (3, 24, 0)
@property
def supports_tuple_comparison(self):
"""
Do we support comparing tuples, i.e. `(a, b) > (c, d)`? This requires
SQLite 3.15+.
"""
return self.module.sqlite_version_info >= (3, 15, 0)
@property
def supports_using_any_list(self):
"""Do we support using `a = ANY(?)` and passing a list"""
@ -72,8 +64,11 @@ class Sqlite3Engine(BaseDatabaseEngine["sqlite3.Connection"]):
def check_database(self, db_conn, allow_outdated_version: bool = False):
if not allow_outdated_version:
version = self.module.sqlite_version_info
if version < (3, 11, 0):
raise RuntimeError("Synapse requires sqlite 3.11 or above.")
# Synapse is untested against older SQLite versions, and we don't want
# to let users upgrade to a version of Synapse with broken support for their
# sqlite version, because it risks leaving them with a half-upgraded db.
if version < (3, 22, 0):
raise RuntimeError("Synapse requires sqlite 3.22 or above.")
def check_new_database(self, txn):
"""Gets called when setting up a brand new database. This allows us to

13
tests/storage/test_database.py
View File

@ -36,17 +36,6 @@ def _stub_db_engine(**kwargs) -> BaseDatabaseEngine:
class TupleComparisonClauseTestCase(unittest.TestCase):
def test_native_tuple_comparison(self):
db_engine = _stub_db_engine(supports_tuple_comparison=True)
clause, args = make_tuple_comparison_clause(db_engine, [("a", 1), ("b", 2)])
clause, args = make_tuple_comparison_clause([("a", 1), ("b", 2)])
self.assertEqual(clause, "(a,b) > (?,?)")
self.assertEqual(args, [1, 2])
def test_emulated_tuple_comparison(self):
db_engine = _stub_db_engine(supports_tuple_comparison=False)
clause, args = make_tuple_comparison_clause(
db_engine, [("a", 1), ("b", 2), ("c", 3)]
)
self.assertEqual(
clause, "(a >= ? AND (a > ? OR (b >= ? AND (b > ? OR c > ?))))"
)
self.assertEqual(args, [1, 1, 2, 2, 3])

14
tox.ini
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@ -1,5 +1,8 @@
[tox]
envlist = packaging, py35, py36, py37, py38, py39, check_codestyle, check_isort
envlist = packaging, py36, py37, py38, py39, check_codestyle, check_isort
# we require tox>=2.3.2 for the fix to https://github.com/tox-dev/tox/issues/208
minversion = 2.3.2
[base]
deps =
@ -48,6 +51,7 @@ deps =
extras =
# install the optional dependendencies for tox environments without
# '-noextras' in their name
# (this requires tox 3)
!noextras: all
test
@ -74,8 +78,6 @@ commands =
# we use "env" rather than putting a value in `setenv` so that it is not
# inherited by other tox environments.
#
# keep this in sync with the copy in `testenv:py3-old`.
#
/usr/bin/env COVERAGE_PROCESS_START={toxinidir}/.coveragerc "{envbindir}/trial" {env:TRIAL_FLAGS:} {posargs:tests} {env:TOXSUFFIX:}
# As of twisted 16.4, trial tries to import the tests as a package (previously
@ -121,11 +123,7 @@ commands =
# Install Synapse itself. This won't update any libraries.
pip install -e ".[test]"
# we have to duplicate the command from `testenv` rather than refer to it
# as `{[testenv]commands}`, because we run on ubuntu xenial, which has
# tox 2.3.1, and https://github.com/tox-dev/tox/issues/208.
#
/usr/bin/env COVERAGE_PROCESS_START={toxinidir}/.coveragerc "{envbindir}/trial" {env:TRIAL_FLAGS:} {posargs:tests} {env:TOXSUFFIX:}
{[testenv]commands}
[testenv:benchmark]
deps =