From e30563ec55b52ceeb6df48d89286a879000b0305 Mon Sep 17 00:00:00 2001
From: Matthew Eric Bassett <matthew@emurgo.io>
Date: Thu, 13 Aug 2020 00:45:11 +0100
Subject: [PATCH 1/2] add - index on tx_out.payment_cred

handy if you want to query utxos by payment credential.
---
 schema/migration-3-0004-20200810.sql | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 schema/migration-3-0004-20200810.sql

diff --git a/schema/migration-3-0004-20200810.sql b/schema/migration-3-0004-20200810.sql
new file mode 100644
index 000000000..641771096
--- /dev/null
+++ b/schema/migration-3-0004-20200810.sql
@@ -0,0 +1,25 @@
+CREATE FUNCTION migrate() RETURNS void AS $$
+DECLARE
+  next_version int ;
+BEGIN
+  SELECT stage_three + 1 INTO next_version FROM schema_version ;
+  IF next_version <= 4 THEN
+    -- -------------------------------------------------------------------------
+    -- More hand crafted indices for performance
+
+    -- helpful in case anyone is looking for a utxo by a payment credential.
+
+    CREATE INDEX idx_tx_out
+    ON tx_out(payment_cred);
+
+    -- -------------------------------------------------------------------------
+
+    UPDATE schema_version SET stage_three = 4 ;
+    RAISE NOTICE 'DB has been migrated to stage_three version %', next_version ;
+  END IF ;
+END ;
+$$ LANGUAGE plpgsql ;
+
+SELECT migrate() ;
+
+DROP FUNCTION migrate() ;

From 1b92a6ddf0da877a5366e77c6343cf3f108457f0 Mon Sep 17 00:00:00 2001
From: Matthew Eric Bassett <matthew@emurgo.io>
Date: Thu, 13 Aug 2020 11:16:57 +0100
Subject: [PATCH 2/2] add - index on pool_update.hash_id.

---
 schema/migration-3-0004-20200810.sql | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/schema/migration-3-0004-20200810.sql b/schema/migration-3-0004-20200810.sql
index 641771096..9cd946cfb 100644
--- a/schema/migration-3-0004-20200810.sql
+++ b/schema/migration-3-0004-20200810.sql
@@ -9,9 +9,12 @@ BEGIN
 
     -- helpful in case anyone is looking for a utxo by a payment credential.
 
-    CREATE INDEX idx_tx_out
+    CREATE INDEX idx_tx_out_payment_cred
     ON tx_out(payment_cred);
 
+    CREATE INDEX idx_pool_update_hash_id
+    ON pool_update(hash_id);
+
     -- -------------------------------------------------------------------------
 
     UPDATE schema_version SET stage_three = 4 ;