Add pointer from chan to the last msg, add messages_queue table

sam/db/schema/mysql/20180704080000.base.up.sql

@@ -25,12 +25,14 @@ CREATE TABLE teams (
 -- Keeps all known channels
 CREATE TABLE channels (
   id               BIGINT UNSIGNED NOT NULL,
-  label            TEXT            NOT NULL, -- display name of the channel
+  name             TEXT            NOT NULL, -- display name of the channel
   meta             JSON            NOT NULL,
 
   archived_at      DATETIME            NULL,
   deleted_at       DATETIME            NULL, -- channel soft delete
 
+  rel_last_message BIGINT UNSIGNED,
+
   PRIMARY KEY (id)
 );
 
@@ -102,6 +104,19 @@ CREATE TABLE messages (
 );
 
 
+-- temp copy of messages (when they are pushed to the primary organisation, row gets removed)
+CREATE TABLE messages_queue (
+  id               BIGINT UNSIGNED NOT NULL,
+  mimetype         VARCHAR(255)         NULL,
+  body             TEXT                 NULL,
+  rel_user         BIGINT  UNSIGNED NOT NULL REFERENCES users(id),
+  rel_channel      BIGINT  UNSIGNED NOT NULL REFERENCES channels(id),
+  rel_message      BIGINT  UNSIGNED NOT NULL REFERENCES messages(id),
+
+  PRIMARY KEY (id)
+);
+
+
 CREATE TABLE channel_views (
   rel_channel      BIGINT UNSIGNED NOT NULL REFERENCES channels(id),
   rel_user         BIGINT UNSIGNED NOT NULL REFERENCES users(id),
@@ -113,4 +128,4 @@ CREATE TABLE channel_views (
   new_since        INT    UNSIGNED NOT NULL DEFAULT 0,
 
   PRIMARY KEY (rel_user, rel_channel)
-);
+);