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Remove outdated constraint on remote_media_cache_thumbnails (#9725)

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The `remote_media_cache_thumbnails_media_origin_media_id_thumbna_key`
constraint is superceded by
`remote_media_repository_thumbn_media_origin_id_width_height_met` (which adds
`thumbnail_method` to the unique key).

PR #7124 made an attempt to remove the old constraint, but got the name wrong,
so it didn't work. Here we update the bg update and rerun it.

Fixes #8649.
This commit is contained in:
Richard van der Hoff 2021-04-06 13:36:05 +01:00 • committed by GitHub
parent 5688a74cf3
commit 0ef321ff3b
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3 changed files with 41 additions and 3 deletions
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21
synapse/storage/databases/main/media_repository.py
View file

@ -22,6 +22,9 @@ from synapse.storage.database import DatabasePool
BG_UPDATE_REMOVE_MEDIA_REPO_INDEX_WITHOUT_METHOD = (
"media_repository_drop_index_wo_method"
)
BG_UPDATE_REMOVE_MEDIA_REPO_INDEX_WITHOUT_METHOD_2 = (
"media_repository_drop_index_wo_method_2"
)
class MediaSortOrder(Enum):
@ -85,23 +88,35 @@ class MediaRepositoryBackgroundUpdateStore(SQLBaseStore):
unique=True,
)
# the original impl of _drop_media_index_without_method was broken (see
# https://github.com/matrix-org/synapse/issues/8649), so we replace the original
# impl with a no-op and run the fixed migration as
# media_repository_drop_index_wo_method_2.
self.db_pool.updates.register_noop_background_update(
BG_UPDATE_REMOVE_MEDIA_REPO_INDEX_WITHOUT_METHOD
)
self.db_pool.updates.register_background_update_handler(
BG_UPDATE_REMOVE_MEDIA_REPO_INDEX_WITHOUT_METHOD,
BG_UPDATE_REMOVE_MEDIA_REPO_INDEX_WITHOUT_METHOD_2,
self._drop_media_index_without_method,
)
async def _drop_media_index_without_method(self, progress, batch_size):
"""background update handler which removes the old constraints.
Note that this is only run on postgres.
"""
def f(txn):
txn.execute(
"ALTER TABLE local_media_repository_thumbnails DROP CONSTRAINT IF EXISTS local_media_repository_thumbn_media_id_thumbnail_width_thum_key"
)
txn.execute(
"ALTER TABLE remote_media_cache_thumbnails DROP CONSTRAINT IF EXISTS remote_media_repository_thumbn_media_id_thumbnail_width_thum_key"
"ALTER TABLE remote_media_cache_thumbnails DROP CONSTRAINT IF EXISTS remote_media_cache_thumbnails_media_origin_media_id_thumbna_key"
)
await self.db_pool.runInteraction("drop_media_indices_without_method", f)
await self.db_pool.updates._end_background_update(
BG_UPDATE_REMOVE_MEDIA_REPO_INDEX_WITHOUT_METHOD
BG_UPDATE_REMOVE_MEDIA_REPO_INDEX_WITHOUT_METHOD_2
)
return 1