Initial open source release

deploy/migrations/0047_dialog_drafts.up.sql

@@ -0,0 +1,31 @@
+-- 0047_dialog_drafts: persistent cloud drafts for private dialogs and channels.
+
+CREATE TABLE IF NOT EXISTS dialog_drafts (
+    user_id        BIGINT      NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    peer_type      VARCHAR(16) NOT NULL,
+    peer_id        BIGINT      NOT NULL,
+    top_message_id INT         NOT NULL DEFAULT 0,
+    date           INT         NOT NULL DEFAULT 0,
+    draft          JSONB       NOT NULL DEFAULT '{}'::jsonb,
+    created_at     TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at     TIMESTAMPTZ NOT NULL DEFAULT now(),
+    PRIMARY KEY (user_id, peer_type, peer_id, top_message_id),
+    CONSTRAINT dialog_drafts_peer_type_check CHECK (peer_type IN ('user', 'channel')),
+    CONSTRAINT dialog_drafts_top_message_id_check CHECK (top_message_id >= 0)
+) PARTITION BY HASH (user_id);
+
+CREATE INDEX IF NOT EXISTS dialog_drafts_user_date_idx
+    ON dialog_drafts (user_id, date DESC, peer_type, peer_id, top_message_id);
+
+DO $$
+DECLARE
+    i int;
+BEGIN
+    FOR i IN 0..63 LOOP
+        EXECUTE format(
+            'CREATE TABLE IF NOT EXISTS dialog_drafts_p%s PARTITION OF dialog_drafts FOR VALUES WITH (MODULUS 64, REMAINDER %s)',
+            lpad(i::text, 2, '0'),
+            i
+        );
+    END LOOP;
+END $$;