Update event_sourcing.sql - added transaction_id column to events table

Author: idugalic

src/main/resources/sql/event_sourcing.sql

@@ -36,6 +36,8 @@ CREATE TABLE IF NOT EXISTS events
     "created_at"  TIMESTAMP WITH TIME ZONE DEFAULT NOW() NOT NULL,
     -- ordering sequence/offset for all events in all deciders. AUTOPOPULATES—DO NOT INSERT
     "offset"      BIGSERIAL PRIMARY KEY,
+    -- Postgres transaction id
+    "transaction_id" XID8 DEFAULT pg_current_xact_id() NOT NULL,
     FOREIGN KEY ("decider", "event") REFERENCES deciders ("decider", "event")
 );