Fix off chain vote data missing

Fixes #1805

Author: kderme

cardano-db/src/Cardano/Db/Schema.hs

@@ -691,7 +691,7 @@ share
     json                Text                sqltype=jsonb
     bytes               ByteString          sqltype=bytea
     pmrId               PoolMetadataRefId   noreference
-    UniqueOffChainPoolData  poolId hash
+    UniqueOffChainPoolData  poolId pmrId
     deriving Show
 
   -- The pool metadata fetch error. We duplicate the poolId for easy access.

schema/migration-2-0042-20240808.sql

@@ -0,0 +1,22 @@
+-- Persistent generated migration.
+
+CREATE FUNCTION migrate() RETURNS void AS $$
+DECLARE
+  next_version int ;
+BEGIN
+  SELECT stage_two + 1 INTO next_version FROM schema_version ;
+  IF next_version = 42 THEN
+    EXECUTE 'ALTER TABLE "voting_procedure" ADD COLUMN "invalid" INT8 NULL' ;
+    EXECUTE 'CREATe TABLE "event_info"("id" SERIAL8  PRIMARY KEY UNIQUE,"tx_id" INT8 NULL,"epoch" word31type NOT NULL,"type" VARCHAR NOT NULL,"explanation" VARCHAR NULL)' ;
+    EXECUTE 'ALTER TABLE "off_chain_pool_data" DROP CONSTRAINT "unique_off_chain_pool_data"' ;
+    EXECUTE 'ALTER TABLE "off_chain_pool_data" ADD CONSTRAINT "unique_off_chain_pool_data" UNIQUE("pool_id","pmr_id")' ;
+    -- Hand written SQL statements can be added here.
+    UPDATE schema_version SET stage_two = next_version ;
+    RAISE NOTICE 'DB has been migrated to stage_two version %', next_version ;
+  END IF ;
+END ;
+$$ LANGUAGE plpgsql ;
+
+SELECT migrate() ;
+
+DROP FUNCTION migrate() ;