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- # Copyright 2021 The Matrix.org Foundation C.I.C.
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # 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.
-
- SCHEMA_VERSION = 69 # remember to update the list below when updating
- """Represents the expectations made by the codebase about the database schema
-
- This should be incremented whenever the codebase changes its requirements on the
- shape of the database schema (even if those requirements are backwards-compatible with
- older versions of Synapse).
-
- See https://matrix-org.github.io/synapse/develop/development/database_schema.html
- for more information on how this works.
-
- Changes in SCHEMA_VERSION = 61:
- - The `user_stats_historical` and `room_stats_historical` tables are not written and
- are not read (previously, they were written but not read).
- - MSC2716: Add `insertion_events` and `insertion_event_edges` tables to keep track
- of insertion events in order to navigate historical chunks of messages.
- - MSC2716: Add `chunk_events` table to track how the chunk is labeled and
- determines which insertion event it points to.
-
- Changes in SCHEMA_VERSION = 62:
- - MSC2716: Add `insertion_event_extremities` table that keeps track of which
- insertion events need to be backfilled.
-
- Changes in SCHEMA_VERSION = 63:
- - The `public_room_list_stream` table is not written nor read to
- (previously, it was written and read to, but not for any significant purpose).
- https://github.com/matrix-org/synapse/pull/10565
-
- Changes in SCHEMA_VERSION = 64:
- - MSC2716: Rename related tables and columns from "chunks" to "batches".
-
- Changes in SCHEMA_VERSION = 65:
- - MSC2716: Remove unique event_id constraint from insertion_event_edges
- because an insertion event can have multiple edges.
- - Remove unused tables `user_stats_historical` and `room_stats_historical`.
-
- Changes in SCHEMA_VERSION = 66:
- - Queries on state_key columns are now disambiguated (ie, the codebase can handle
- the `events` table having a `state_key` column).
-
- Changes in SCHEMA_VERSION = 67:
- - state_events.prev_state is no longer written to.
-
- Changes in SCHEMA_VERSION = 68:
- - event_reference_hashes is no longer read.
- - `events` has `state_key` and `rejection_reason` columns, which are populated for
- new events.
-
- Changes in SCHEMA_VERSION = 69:
- - We now write to `device_lists_changes_in_room` table.
- - Use sequence to generate future `application_services_txns.txn_id`s
- """
-
-
- SCHEMA_COMPAT_VERSION = (
- # We now assume that `device_lists_changes_in_room` has been filled out for
- # recent device_list_updates.
- 69
- )
- """Limit on how far the synapse codebase can be rolled back without breaking db compat
-
- This value is stored in the database, and checked on startup. If the value in the
- database is greater than SCHEMA_VERSION, then Synapse will refuse to start.
- """
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