add replaced_transaction update script

apps/explorer/priv/repo/migrations/20190124082812_add_index_on_transaction_nonce_and_from_address_hash.exs

@@ -9,19 +9,6 @@ defmodule Explorer.Repo.Migrations.AddIndexOnTransactionNonceAndFromAddressHash
 
   def change do
     create(index(:transactions, [:nonce, :from_address_hash, :block_hash]))
-    # for replaced/dropeed transactions
     create(index(:transactions, [:block_hash, :error]))
-
-    query = "UPDATE transactions SET error = 'dropped/replaced', status = 0 FROM transactions t1
-    INNER JOIN transactions t2
-    ON t1.from_address_hash = t2.from_address_hash AND t1.nonce = t2.nonce
-    WHERE t1.block_hash IS NULL AND t2.block_hash IS NOT NULL"
-
-    SQL.query!(
-      Repo,
-      query,
-      [],
-      timeout: @timeout
-    )
   end
 end

apps/explorer/priv/repo/migrations/scripts/update_replaced_transaction.sql

@@ -0,0 +1,23 @@
+DO $$
+  DECLARE
+    start_time          TIMESTAMP WITHOUT TIME ZONE := clock_timestamp();
+    end_time            TIMESTAMP WITHOUT TIME ZONE;
+    elapsed_time        INTERVAL;
+    temp_start_time     TIMESTAMP WITHOUT TIME ZONE;
+    temp_end_time       TIMESTAMP WITHOUT TIME ZONE;
+  BEGIN
+    RAISE NOTICE 'Started at %', start_time;
+
+    temp_start_time := clock_timestamp();
+
+    UPDATE transactions SET error = 'dropped/replaced', status = 0 FROM transactions t1
+    INNER JOIN transactions t2
+    ON t1.from_address_hash = t2.from_address_hash AND t1.nonce = t2.nonce
+    WHERE t1.block_hash IS NULL AND t2.block_hash IS NOT NULL;
+
+    end_time := clock_timestamp();
+    elapsed_time := end_time - start_time;
+
+    RAISE NOTICE 'Ended at %s', end_time;
+    RAISE NOTICE 'Elapsed time: %', elapsed_time;
+END $$;