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Set thread_id column to non-null for event_push_{actions,actions_staging,summary} (#15437)
Updates the database schema to require a thread_id (by adding a constraint that the column is non-null) for event_push_actions, event_push_actions_staging, and event_push_actions_summary. For PostgreSQL we add the constraint as NOT VALID, then VALIDATE the constraint a background job to avoid locking the table during an upgrade. For SQLite we simply rebuild the table & copy the data.
This commit is contained in:
Patrick Cloke
GitHub
parent
04e79e6a18
commit
a7b3e9ce65
7 changed files with 225 additions and 234 deletions
1
changelog.d/15437.misc
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1
changelog.d/15437.misc
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@ -0,0 +1 @@
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Make the `thread_id` column on `event_push_actions`, `event_push_actions_staging`, and `event_push_summary` non-null.
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@ -561,6 +561,50 @@ class BackgroundUpdater:
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updater, oneshot=True
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)
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def register_background_validate_constraint(
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self, update_name: str, constraint_name: str, table: str
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) -> None:
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"""Helper for store classes to do a background validate constraint.
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This only applies on PostgreSQL.
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To use:
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1. use a schema delta file to add a background update. Example:
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INSERT INTO background_updates (update_name, progress_json) VALUES
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('validate_my_constraint', '{}');
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2. In the Store constructor, call this method
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Args:
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update_name: update_name to register for
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constraint_name: name of constraint to validate
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table: table the constraint is applied to
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"""
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def runner(conn: Connection) -> None:
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c = conn.cursor()
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sql = f"""
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ALTER TABLE {table} VALIDATE CONSTRAINT {constraint_name};
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"""
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logger.debug("[SQL] %s", sql)
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c.execute(sql)
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async def updater(progress: JsonDict, batch_size: int) -> int:
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assert isinstance(
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self.db_pool.engine, engines.PostgresEngine
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), "validate constraint background update registered for non-Postres database"
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logger.info("Validating constraint %s to %s", constraint_name, table)
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await self.db_pool.runWithConnection(runner)
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await self._end_background_update(update_name)
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return 1
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self._background_update_handlers[update_name] = _BackgroundUpdateHandler(
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updater, oneshot=True
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)
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async def create_index_in_background(
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self,
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index_name: str,
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@ -100,7 +100,6 @@ from synapse.storage.database import (
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)
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from synapse.storage.databases.main.receipts import ReceiptsWorkerStore
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from synapse.storage.databases.main.stream import StreamWorkerStore
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from synapse.types import JsonDict
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from synapse.util import json_encoder
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from synapse.util.caches.descriptors import cached
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@ -289,180 +288,22 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas
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unique=True,
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)
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self.db_pool.updates.register_background_update_handler(
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"event_push_backfill_thread_id",
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self._background_backfill_thread_id,
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self.db_pool.updates.register_background_validate_constraint(
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"event_push_actions_staging_thread_id",
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constraint_name="event_push_actions_staging_thread_id",
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table="event_push_actions_staging",
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)
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# Indexes which will be used to quickly make the thread_id column non-null.
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self.db_pool.updates.register_background_index_update(
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"event_push_actions_thread_id_null",
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index_name="event_push_actions_thread_id_null",
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self.db_pool.updates.register_background_validate_constraint(
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"event_push_actions_thread_id",
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constraint_name="event_push_actions_thread_id",
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table="event_push_actions",
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columns=["thread_id"],
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where_clause="thread_id IS NULL",
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)
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self.db_pool.updates.register_background_index_update(
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"event_push_summary_thread_id_null",
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index_name="event_push_summary_thread_id_null",
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self.db_pool.updates.register_background_validate_constraint(
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"event_push_summary_thread_id",
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constraint_name="event_push_summary_thread_id",
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table="event_push_summary",
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columns=["thread_id"],
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where_clause="thread_id IS NULL",
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)
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# Check ASAP (and then later, every 1s) to see if we have finished
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# background updates the event_push_actions and event_push_summary tables.
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self._clock.call_later(0.0, self._check_event_push_backfill_thread_id)
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self._event_push_backfill_thread_id_done = False
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@wrap_as_background_process("check_event_push_backfill_thread_id")
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async def _check_event_push_backfill_thread_id(self) -> None:
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"""
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Has thread_id finished backfilling?
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If not, we need to just-in-time update it so the queries work.
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"""
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done = await self.db_pool.updates.has_completed_background_update(
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"event_push_backfill_thread_id"
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)
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if done:
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self._event_push_backfill_thread_id_done = True
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else:
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# Reschedule to run.
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self._clock.call_later(15.0, self._check_event_push_backfill_thread_id)
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async def _background_backfill_thread_id(
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self, progress: JsonDict, batch_size: int
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) -> int:
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"""
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Fill in the thread_id field for event_push_actions and event_push_summary.
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This is preparatory so that it can be made non-nullable in the future.
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Because all current (null) data is done in an unthreaded manner this
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simply assumes it is on the "main" timeline. Since event_push_actions
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are periodically cleared it is not possible to correctly re-calculate
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the thread_id.
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"""
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event_push_actions_done = progress.get("event_push_actions_done", False)
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def add_thread_id_txn(
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txn: LoggingTransaction, start_stream_ordering: int
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) -> int:
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sql = """
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SELECT stream_ordering
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FROM event_push_actions
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WHERE
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thread_id IS NULL
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AND stream_ordering > ?
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ORDER BY stream_ordering
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LIMIT ?
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"""
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txn.execute(sql, (start_stream_ordering, batch_size))
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# No more rows to process.
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rows = txn.fetchall()
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if not rows:
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progress["event_push_actions_done"] = True
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self.db_pool.updates._background_update_progress_txn(
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txn, "event_push_backfill_thread_id", progress
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)
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return 0
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# Update the thread ID for any of those rows.
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max_stream_ordering = rows[-1][0]
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sql = """
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UPDATE event_push_actions
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SET thread_id = 'main'
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WHERE ? < stream_ordering AND stream_ordering <= ? AND thread_id IS NULL
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"""
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txn.execute(
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sql,
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(
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start_stream_ordering,
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max_stream_ordering,
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),
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)
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# Update progress.
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processed_rows = txn.rowcount
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progress["max_event_push_actions_stream_ordering"] = max_stream_ordering
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self.db_pool.updates._background_update_progress_txn(
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txn, "event_push_backfill_thread_id", progress
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)
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return processed_rows
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def add_thread_id_summary_txn(txn: LoggingTransaction) -> int:
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min_user_id = progress.get("max_summary_user_id", "")
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min_room_id = progress.get("max_summary_room_id", "")
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# Slightly overcomplicated query for getting the Nth user ID / room
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# ID tuple, or the last if there are less than N remaining.
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sql = """
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SELECT user_id, room_id FROM (
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SELECT user_id, room_id FROM event_push_summary
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WHERE (user_id, room_id) > (?, ?)
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AND thread_id IS NULL
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ORDER BY user_id, room_id
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LIMIT ?
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) AS e
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ORDER BY user_id DESC, room_id DESC
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LIMIT 1
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"""
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txn.execute(sql, (min_user_id, min_room_id, batch_size))
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row = txn.fetchone()
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if not row:
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return 0
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max_user_id, max_room_id = row
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sql = """
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UPDATE event_push_summary
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SET thread_id = 'main'
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WHERE
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(?, ?) < (user_id, room_id) AND (user_id, room_id) <= (?, ?)
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AND thread_id IS NULL
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"""
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txn.execute(sql, (min_user_id, min_room_id, max_user_id, max_room_id))
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processed_rows = txn.rowcount
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progress["max_summary_user_id"] = max_user_id
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progress["max_summary_room_id"] = max_room_id
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self.db_pool.updates._background_update_progress_txn(
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txn, "event_push_backfill_thread_id", progress
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)
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return processed_rows
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# First update the event_push_actions table, then the event_push_summary table.
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#
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# Note that the event_push_actions_staging table is ignored since it is
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# assumed that items in that table will only exist for a short period of
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# time.
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if not event_push_actions_done:
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result = await self.db_pool.runInteraction(
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"event_push_backfill_thread_id",
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add_thread_id_txn,
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progress.get("max_event_push_actions_stream_ordering", 0),
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)
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else:
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result = await self.db_pool.runInteraction(
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"event_push_backfill_thread_id",
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add_thread_id_summary_txn,
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)
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# Only done after the event_push_summary table is done.
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if not result:
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await self.db_pool.updates._end_background_update(
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"event_push_backfill_thread_id"
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)
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return result
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async def get_unread_counts_by_room_for_user(self, user_id: str) -> Dict[str, int]:
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"""Get the notification count by room for a user. Only considers notifications,
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not highlight or unread counts, and threads are currently aggregated under their room.
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@ -711,25 +552,6 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas
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(ReceiptTypes.READ, ReceiptTypes.READ_PRIVATE),
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)
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# First ensure that the existing rows have an updated thread_id field.
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if not self._event_push_backfill_thread_id_done:
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txn.execute(
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"""
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UPDATE event_push_summary
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SET thread_id = ?
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WHERE room_id = ? AND user_id = ? AND thread_id is NULL
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""",
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(MAIN_TIMELINE, room_id, user_id),
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)
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txn.execute(
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"""
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UPDATE event_push_actions
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SET thread_id = ?
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WHERE room_id = ? AND user_id = ? AND thread_id is NULL
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""",
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(MAIN_TIMELINE, room_id, user_id),
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)
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# First we pull the counts from the summary table.
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#
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# We check that `last_receipt_stream_ordering` matches the stream ordering of the
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@ -1545,25 +1367,6 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas
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(room_id, user_id, stream_ordering, *thread_args),
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)
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# First ensure that the existing rows have an updated thread_id field.
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if not self._event_push_backfill_thread_id_done:
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txn.execute(
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"""
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UPDATE event_push_summary
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SET thread_id = ?
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WHERE room_id = ? AND user_id = ? AND thread_id is NULL
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""",
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(MAIN_TIMELINE, room_id, user_id),
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)
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txn.execute(
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"""
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UPDATE event_push_actions
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SET thread_id = ?
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WHERE room_id = ? AND user_id = ? AND thread_id is NULL
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""",
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(MAIN_TIMELINE, room_id, user_id),
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)
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# Fetch the notification counts between the stream ordering of the
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# latest receipt and what was previously summarised.
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unread_counts = self._get_notif_unread_count_for_user_room(
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@ -1698,19 +1501,6 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas
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rotate_to_stream_ordering: The new maximum event stream ordering to summarise.
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"""
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# Ensure that any new actions have an updated thread_id.
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if not self._event_push_backfill_thread_id_done:
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txn.execute(
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"""
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UPDATE event_push_actions
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SET thread_id = ?
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WHERE ? < stream_ordering AND stream_ordering <= ? AND thread_id IS NULL
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""",
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(MAIN_TIMELINE, old_rotate_stream_ordering, rotate_to_stream_ordering),
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)
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# XXX Do we need to update summaries here too?
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# Calculate the new counts that should be upserted into event_push_summary
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sql = """
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SELECT user_id, room_id, thread_id,
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@ -1773,20 +1563,6 @@ class EventPushActionsWorkerStore(ReceiptsWorkerStore, StreamWorkerStore, SQLBas
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logger.info("Rotating notifications, handling %d rows", len(summaries))
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# Ensure that any updated threads have the proper thread_id.
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if not self._event_push_backfill_thread_id_done:
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txn.execute_batch(
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"""
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UPDATE event_push_summary
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SET thread_id = ?
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WHERE room_id = ? AND user_id = ? AND thread_id is NULL
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""",
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[
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(MAIN_TIMELINE, room_id, user_id)
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for user_id, room_id, _ in summaries
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],
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)
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self.db_pool.simple_upsert_many_txn(
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txn,
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table="event_push_summary",
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@ -106,6 +106,9 @@ Changes in SCHEMA_VERSION = 76:
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SCHEMA_COMPAT_VERSION = (
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# Queries against `event_stream_ordering` columns in membership tables must
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# be disambiguated.
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#
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# The threads_id column must written to with non-null values for the
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# event_push_actions, event_push_actions_staging, and event_push_summary tables.
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74
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)
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"""Limit on how far the synapse codebase can be rolled back without breaking db compat
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@ -0,0 +1,28 @@
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/* Copyright 2023 The Matrix.org Foundation C.I.C
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
|
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* You may obtain a copy of the License at
|
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*
|
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
|
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* distributed under the License is distributed on an "AS IS" BASIS,
|
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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* See the License for the specific language governing permissions and
|
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* limitations under the License.
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*/
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-- Force the background updates from 06thread_notifications.sql to run in the
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-- foreground as code will now require those to be "done".
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DELETE FROM background_updates WHERE update_name = 'event_push_backfill_thread_id';
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-- Overwrite any null thread_id values.
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UPDATE event_push_actions_staging SET thread_id = 'main' WHERE thread_id IS NULL;
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UPDATE event_push_actions SET thread_id = 'main' WHERE thread_id IS NULL;
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UPDATE event_push_summary SET thread_id = 'main' WHERE thread_id IS NULL;
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-- Drop the background updates to calculate the indexes used to find null thread_ids.
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DELETE FROM background_updates WHERE update_name = 'event_push_actions_thread_id_null';
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DELETE FROM background_updates WHERE update_name = 'event_push_summary_thread_id_null';
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|
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@ -0,0 +1,37 @@
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/* Copyright 2022 The Matrix.org Foundation C.I.C
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*
|
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* Licensed under the Apache License, Version 2.0 (the "License");
|
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* you may not use this file except in compliance with the License.
|
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* You may obtain a copy of the License at
|
||||
*
|
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* http://www.apache.org/licenses/LICENSE-2.0
|
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*
|
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* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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* See the License for the specific language governing permissions and
|
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* limitations under the License.
|
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*/
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-- The thread_id columns can now be made non-nullable, this is done by using a
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-- constraint (and not altering the column) to avoid taking out a full table lock.
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--
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-- We initially add an invalid constraint which guards against new data (this
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-- doesn't lock the table).
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ALTER TABLE event_push_actions_staging
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ADD CONSTRAINT event_push_actions_staging_thread_id CHECK (thread_id IS NOT NULL) NOT VALID;
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ALTER TABLE event_push_actions
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ADD CONSTRAINT event_push_actions_thread_id CHECK (thread_id IS NOT NULL) NOT VALID;
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ALTER TABLE event_push_summary
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ADD CONSTRAINT event_push_summary_thread_id CHECK (thread_id IS NOT NULL) NOT VALID;
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-- We then validate the constraint which doesn't need to worry about new data. It
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-- only needs a SHARE UPDATE EXCLUSIVE lock but can still take a while to complete.
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INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
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(7605, 'event_push_actions_staging_thread_id', '{}'),
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(7605, 'event_push_actions_thread_id', '{}'),
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(7605, 'event_push_summary_thread_id', '{}');
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-- Drop the indexes used to find null thread_ids.
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DROP INDEX IF EXISTS event_push_actions_thread_id_null;
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DROP INDEX IF EXISTS event_push_summary_thread_id_null;
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|
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@ -0,0 +1,102 @@
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/* Copyright 2022 The Matrix.org Foundation C.I.C
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*
|
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* Licensed under the Apache License, Version 2.0 (the "License");
|
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* you may not use this file except in compliance with the License.
|
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* You may obtain a copy of the License at
|
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*
|
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* http://www.apache.org/licenses/LICENSE-2.0
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*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
-- The thread_id columns can now be made non-nullable.
|
||||
--
|
||||
-- SQLite doesn't support modifying columns to an existing table, so it must
|
||||
-- be recreated.
|
||||
|
||||
-- Create the new tables.
|
||||
CREATE TABLE event_push_actions_staging_new (
|
||||
event_id TEXT NOT NULL,
|
||||
user_id TEXT NOT NULL,
|
||||
actions TEXT NOT NULL,
|
||||
notif SMALLINT NOT NULL,
|
||||
highlight SMALLINT NOT NULL,
|
||||
unread SMALLINT,
|
||||
thread_id TEXT,
|
||||
inserted_ts BIGINT,
|
||||
CONSTRAINT event_push_actions_staging_thread_id CHECK (thread_id is NOT NULL)
|
||||
);
|
||||
|
||||
CREATE TABLE event_push_actions_new (
|
||||
room_id TEXT NOT NULL,
|
||||
event_id TEXT NOT NULL,
|
||||
user_id TEXT NOT NULL,
|
||||
profile_tag VARCHAR(32),
|
||||
actions TEXT NOT NULL,
|
||||
topological_ordering BIGINT,
|
||||
stream_ordering BIGINT,
|
||||
notif SMALLINT,
|
||||
highlight SMALLINT,
|
||||
unread SMALLINT,
|
||||
thread_id TEXT,
|
||||
CONSTRAINT event_id_user_id_profile_tag_uniqueness UNIQUE (room_id, event_id, user_id, profile_tag),
|
||||
CONSTRAINT event_push_actions_thread_id CHECK (thread_id is NOT NULL)
|
||||
);
|
||||
|
||||
CREATE TABLE event_push_summary_new (
|
||||
user_id TEXT NOT NULL,
|
||||
room_id TEXT NOT NULL,
|
||||
notif_count BIGINT NOT NULL,
|
||||
stream_ordering BIGINT NOT NULL,
|
||||
unread_count BIGINT,
|
||||
last_receipt_stream_ordering BIGINT,
|
||||
thread_id TEXT,
|
||||
CONSTRAINT event_push_summary_thread_id CHECK (thread_id is NOT NULL)
|
||||
);
|
||||
|
||||
-- Copy the data.
|
||||
INSERT INTO event_push_actions_staging_new (event_id, user_id, actions, notif, highlight, unread, thread_id, inserted_ts)
|
||||
SELECT event_id, user_id, actions, notif, highlight, unread, thread_id, inserted_ts
|
||||
FROM event_push_actions_staging;
|
||||
|
||||
INSERT INTO event_push_actions_new (room_id, event_id, user_id, profile_tag, actions, topological_ordering, stream_ordering, notif, highlight, unread, thread_id)
|
||||
SELECT room_id, event_id, user_id, profile_tag, actions, topological_ordering, stream_ordering, notif, highlight, unread, thread_id
|
||||
FROM event_push_actions;
|
||||
|
||||
INSERT INTO event_push_summary_new (user_id, room_id, notif_count, stream_ordering, unread_count, last_receipt_stream_ordering, thread_id)
|
||||
SELECT user_id, room_id, notif_count, stream_ordering, unread_count, last_receipt_stream_ordering, thread_id
|
||||
FROM event_push_summary;
|
||||
|
||||
-- Drop the old tables.
|
||||
DROP TABLE event_push_actions_staging;
|
||||
DROP TABLE event_push_actions;
|
||||
DROP TABLE event_push_summary;
|
||||
|
||||
-- Rename the tables.
|
||||
ALTER TABLE event_push_actions_staging_new RENAME TO event_push_actions_staging;
|
||||
ALTER TABLE event_push_actions_new RENAME TO event_push_actions;
|
||||
ALTER TABLE event_push_summary_new RENAME TO event_push_summary;
|
||||
|
||||
-- Recreate the indexes.
|
||||
CREATE INDEX event_push_actions_staging_id ON event_push_actions_staging(event_id);
|
||||
|
||||
CREATE INDEX event_push_actions_highlights_index ON event_push_actions (user_id, room_id, topological_ordering, stream_ordering);
|
||||
CREATE INDEX event_push_actions_rm_tokens on event_push_actions( user_id, room_id, topological_ordering, stream_ordering );
|
||||
CREATE INDEX event_push_actions_room_id_user_id on event_push_actions(room_id, user_id);
|
||||
CREATE INDEX event_push_actions_stream_ordering on event_push_actions( stream_ordering, user_id );
|
||||
CREATE INDEX event_push_actions_u_highlight ON event_push_actions (user_id, stream_ordering);
|
||||
|
||||
CREATE UNIQUE INDEX event_push_summary_unique_index2 ON event_push_summary (user_id, room_id, thread_id) ;
|
||||
|
||||
-- Recreate some indexes in the background, by re-running the background updates
|
||||
-- from 72/02event_push_actions_index.sql and 72/06thread_notifications.sql.
|
||||
INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
|
||||
(7403, 'event_push_summary_unique_index2', '{}')
|
||||
ON CONFLICT (update_name) DO UPDATE SET progress_json = '{}';
|
||||
INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
|
||||
(7403, 'event_push_actions_stream_highlight_index', '{}')
|
||||
ON CONFLICT (update_name) DO UPDATE SET progress_json = '{}';
|
||||
Loading…
Reference in a new issue