Reorganise the database schema directories (#9932)

The hope here is that by moving all the schema files into synapse/storage/schema, it gets a bit easier for newcomers to navigate.

It certainly got easier for me to write a helpful README. There's more to do on that front, but I'll follow up with other PRs for that.

5 files changed, 99 insertions, 0 deletions

diff --git a/synapse/storage/schema/common/delta/25/00background_updates.sql b/synapse/storage/schema/common/delta/25/00background_updates.sql
new file mode 100644
index 0000000000..2ad9e8fa56
--- /dev/null
+++ b/synapse/storage/schema/common/delta/25/00background_updates.sql
@@ -0,0 +1,21 @@
+/* Copyright 2015, 2016 OpenMarket Ltd
+ *
+ * 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.
+ */
+
+
+CREATE TABLE IF NOT EXISTS background_updates(
+    update_name TEXT NOT NULL, -- The name of the background update.
+    progress_json TEXT NOT NULL, -- The current progress of the update as JSON.
+    CONSTRAINT background_updates_uniqueness UNIQUE (update_name)
+);
diff --git a/synapse/storage/schema/common/delta/35/00background_updates_add_col.sql b/synapse/storage/schema/common/delta/35/00background_updates_add_col.sql
new file mode 100644
index 0000000000..c2d2a4f836
--- /dev/null
+++ b/synapse/storage/schema/common/delta/35/00background_updates_add_col.sql
@@ -0,0 +1,17 @@
+/* Copyright 2016 OpenMarket Ltd
+ *
+ * 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.
+ */
+
+
+ALTER TABLE background_updates ADD COLUMN depends_on TEXT;
diff --git a/synapse/storage/schema/common/delta/58/00background_update_ordering.sql b/synapse/storage/schema/common/delta/58/00background_update_ordering.sql
new file mode 100644
index 0000000000..02dae587cc
--- /dev/null
+++ b/synapse/storage/schema/common/delta/58/00background_update_ordering.sql
@@ -0,0 +1,19 @@
+/* Copyright 2020 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.
+ */
+
+/* add an "ordering" column to background_updates, which can be used to sort them
+   to achieve some level of consistency. */
+
+ALTER TABLE background_updates ADD COLUMN ordering INT NOT NULL DEFAULT 0;
diff --git a/synapse/storage/schema/common/full_schemas/54/full.sql b/synapse/storage/schema/common/full_schemas/54/full.sql
new file mode 100644
index 0000000000..1005880466
--- /dev/null
+++ b/synapse/storage/schema/common/full_schemas/54/full.sql
@@ -0,0 +1,8 @@
+
+
+CREATE TABLE background_updates (
+    update_name text NOT NULL,
+    progress_json text NOT NULL,
+    depends_on text,
+    CONSTRAINT background_updates_uniqueness UNIQUE (update_name)
+);
diff --git a/synapse/storage/schema/common/schema_version.sql b/synapse/storage/schema/common/schema_version.sql
new file mode 100644
index 0000000000..42e5cb6df5
--- /dev/null
+++ b/synapse/storage/schema/common/schema_version.sql
@@ -0,0 +1,34 @@
+/* Copyright 2015, 2016 OpenMarket Ltd
+ *
+ * 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.
+ */
+
+CREATE TABLE IF NOT EXISTS schema_version(
+    Lock CHAR(1) NOT NULL DEFAULT 'X' UNIQUE,  -- Makes sure this table only has one row.
+    version INTEGER NOT NULL,
+    upgraded BOOL NOT NULL,  -- Whether we reached this version from an upgrade or an initial schema.
+    CHECK (Lock='X')
+);
+
+CREATE TABLE IF NOT EXISTS applied_schema_deltas(
+    version INTEGER NOT NULL,
+    file TEXT NOT NULL,
+    UNIQUE(version, file)
+);
+
+-- a list of schema files we have loaded on behalf of dynamic modules
+CREATE TABLE IF NOT EXISTS applied_module_schemas(
+    module_name TEXT NOT NULL,
+    file TEXT NOT NULL,
+    UNIQUE(module_name, file)
+);