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authorErik Johnston <erik@matrix.org>2015-03-04 15:10:05 +0000
committerErik Johnston <erik@matrix.org>2015-03-04 15:10:05 +0000
commitd56c01fff46d9adbccb8149d61f318f11040775e (patch)
tree89c2378fdf95038a2f59dc2bf0d9116166464838 /synapse/storage
parents/schema_deltas/applied_schema_deltas/ (diff)
downloadsynapse-d56c01fff46d9adbccb8149d61f318f11040775e.tar.xz
Note that we don't specify execution order
Diffstat (limited to 'synapse/storage')
-rw-r--r--synapse/storage/__init__.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index e2d5e5a41d..a3ff995695 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -691,6 +691,10 @@ def _upgrade_existing_database(cur, current_version, applied_delta_files,
     even if there has been no version bump. This is useful for development
     where orthogonal schema changes may happen on separate branches.
 
+    Different delta files for the same version *must* be orthogonal and give
+    the same result when applied in any order. No guarantees are made on the
+    order of execution of these scripts.
+
     This is a no-op of current_version == SCHEMA_VERSION.
 
     Example directory structure: