diff options
Diffstat (limited to 'synapse/storage/database.py')
| -rw-r--r-- | synapse/storage/database.py | 101 |
1 files changed, 98 insertions, 3 deletions
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, |