diff --git a/synapse/storage/database.py b/synapse/storage/database.py
index 12750d9b89..5eb545c86e 100644
--- a/synapse/storage/database.py
+++ b/synapse/storage/database.py
@@ -1268,6 +1268,7 @@ class DatabasePool:
value_names: Collection[str],
value_values: Collection[Collection[Any]],
desc: str,
+ lock: bool = True,
) -> None:
"""
Upsert, many times.
@@ -1279,6 +1280,8 @@ class DatabasePool:
value_names: The value column names
value_values: A list of each row's value column values.
Ignored if value_names is empty.
+ lock: True to lock the table when doing the upsert. Unused if the database engine
+ supports native upserts.
"""
# We can autocommit if we are going to use native upserts
@@ -1286,7 +1289,7 @@ class DatabasePool:
self.engine.can_native_upsert and table not in self._unsafe_to_upsert_tables
)
- return await self.runInteraction(
+ await self.runInteraction(
desc,
self.simple_upsert_many_txn,
table,
@@ -1294,6 +1297,7 @@ class DatabasePool:
key_values,
value_names,
value_values,
+ lock=lock,
db_autocommit=autocommit,
)
@@ -1305,6 +1309,7 @@ class DatabasePool:
key_values: Collection[Iterable[Any]],
value_names: Collection[str],
value_values: Iterable[Iterable[Any]],
+ lock: bool = True,
) -> None:
"""
Upsert, many times.
@@ -1316,6 +1321,8 @@ class DatabasePool:
value_names: The value column names
value_values: A list of each row's value column values.
Ignored if value_names is empty.
+ lock: True to lock the table when doing the upsert. Unused if the database engine
+ supports native upserts.
"""
if self.engine.can_native_upsert and table not in self._unsafe_to_upsert_tables:
return self.simple_upsert_many_txn_native_upsert(
@@ -1323,7 +1330,7 @@ class DatabasePool:
)
else:
return self.simple_upsert_many_txn_emulated(
- txn, table, key_names, key_values, value_names, value_values
+ txn, table, key_names, key_values, value_names, value_values, lock=lock
)
def simple_upsert_many_txn_emulated(
@@ -1334,6 +1341,7 @@ class DatabasePool:
key_values: Collection[Iterable[Any]],
value_names: Collection[str],
value_values: Iterable[Iterable[Any]],
+ lock: bool = True,
) -> None:
"""
Upsert, many times, but without native UPSERT support or batching.
@@ -1345,17 +1353,24 @@ class DatabasePool:
value_names: The value column names
value_values: A list of each row's value column values.
Ignored if value_names is empty.
+ lock: True to lock the table when doing the upsert.
"""
# No value columns, therefore make a blank list so that the following
# zip() works correctly.
if not value_names:
value_values = [() for x in range(len(key_values))]
+ if lock:
+ # Lock the table just once, to prevent it being done once per row.
+ # Note that, according to Postgres' documentation, once obtained,
+ # the lock is held for the remainder of the current transaction.
+ self.engine.lock_table(txn, "user_ips")
+
for keyv, valv in zip(key_values, value_values):
_keys = {x: y for x, y in zip(key_names, keyv)}
_vals = {x: y for x, y in zip(value_names, valv)}
- self.simple_upsert_txn_emulated(txn, table, _keys, _vals)
+ self.simple_upsert_txn_emulated(txn, table, _keys, _vals, lock=False)
def simple_upsert_many_txn_native_upsert(
self,
@@ -1792,6 +1807,86 @@ class DatabasePool:
return txn.rowcount
+ async def simple_update_many(
+ self,
+ table: str,
+ key_names: Collection[str],
+ key_values: Collection[Iterable[Any]],
+ value_names: Collection[str],
+ value_values: Iterable[Iterable[Any]],
+ desc: str,
+ ) -> None:
+ """
+ Update, many times, using batching where possible.
+ If the keys don't match anything, nothing will be updated.
+
+ Args:
+ table: The table to update
+ key_names: The key column names.
+ key_values: A list of each row's key column values.
+ value_names: The names of value columns to update.
+ value_values: A list of each row's value column values.
+ """
+
+ await self.runInteraction(
+ desc,
+ self.simple_update_many_txn,
+ table,
+ key_names,
+ key_values,
+ value_names,
+ value_values,
+ )
+
+ @staticmethod
+ def simple_update_many_txn(
+ txn: LoggingTransaction,
+ table: str,
+ key_names: Collection[str],
+ key_values: Collection[Iterable[Any]],
+ value_names: Collection[str],
+ value_values: Collection[Iterable[Any]],
+ ) -> None:
+ """
+ Update, many times, using batching where possible.
+ If the keys don't match anything, nothing will be updated.
+
+ Args:
+ table: The table to update
+ key_names: The key column names.
+ key_values: A list of each row's key column values.
+ value_names: The names of value columns to update.
+ value_values: A list of each row's value column values.
+ """
+
+ if len(value_values) != len(key_values):
+ raise ValueError(
+ f"{len(key_values)} key rows and {len(value_values)} value rows: should be the same number."
+ )
+
+ # List of tuples of (value values, then key values)
+ # (This matches the order needed for the query)
+ args = [tuple(x) + tuple(y) for x, y in zip(value_values, key_values)]
+
+ for ks, vs in zip(key_values, value_values):
+ args.append(tuple(vs) + tuple(ks))
+
+ # 'col1 = ?, col2 = ?, ...'
+ set_clause = ", ".join(f"{n} = ?" for n in value_names)
+
+ if key_names:
+ # 'WHERE col3 = ? AND col4 = ? AND col5 = ?'
+ where_clause = "WHERE " + (" AND ".join(f"{n} = ?" for n in key_names))
+ else:
+ where_clause = ""
+
+ # UPDATE mytable SET col1 = ?, col2 = ? WHERE col3 = ? AND col4 = ?
+ sql = f"""
+ UPDATE {table} SET {set_clause} {where_clause}
+ """
+
+ txn.execute_batch(sql, args)
+
async def simple_update_one(
self,
table: str,
|
