Add Tags and Event_Tags tables to db creation

db/zm_create.sql.in

@@ -1219,6 +1219,26 @@ CREATE TABLE Reports (
   PRIMARY KEY(Id)
 ) ENGINE=@ZM_MYSQL_ENGINE@;
 
+CREATE TABLE `Tags` (
+  `Id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
+  `Name` varchar(64) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT '',
+  `CreateDate` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  `CreatedBy` int(10) unsigned,
+  `LastAssignedDate` dateTime,
+  PRIMARY KEY (`Id`),
+  UNIQUE(`Name`)
+) ENGINE=@ZM_MYSQL_ENGINE@;
+
+CREATE TABLE `Events_Tags` (
+  `TagId` bigint(20) unsigned NOT NULL,
+  `EventId` bigint(20) unsigned NOT NULL,
+  `AssignedDate` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  `AssignedBy` int(10) unsigned,
+  PRIMARY KEY (`TagId`, `EventId`),
+  CONSTRAINT `Events_Tags_ibfk_1` FOREIGN KEY (`TagId`) REFERENCES `Tags` (`Id`) ON DELETE CASCADE,
+  CONSTRAINT `Events_Tags_ibfk_2` FOREIGN KEY (`EventId`) REFERENCES `Events` (`Id`) ON DELETE CASCADE
+) ENGINE=@ZM_MYSQL_ENGINE@;
+
 -- We generally don't alter triggers, we drop and re-create them, so let's keep them in a separate file that we can just source in update scripts.
 source @PKGDATADIR@/db/triggers.sql