From 2d3a173ade4398b3778866b6b3492ce879f1e80d Mon Sep 17 00:00:00 2001
From: hodlonaut <hodlonaut@github.com>
Date: Tue, 3 Dec 2024 10:36:21 +1100
Subject: [PATCH] Performance improvement rejiggling of the second CTE

---
 files/grest/rpc/assets/asset_utxos.sql | 43 +++++++++++++-------------
 1 file changed, 21 insertions(+), 22 deletions(-)

diff --git a/files/grest/rpc/assets/asset_utxos.sql b/files/grest/rpc/assets/asset_utxos.sql
index 2090c80..95ca86d 100644
--- a/files/grest/rpc/assets/asset_utxos.sql
+++ b/files/grest/rpc/assets/asset_utxos.sql
@@ -37,29 +37,11 @@ BEGIN
     WITH
       _txo_list AS (
         SELECT
-          txo.id
+          DISTINCT txo.id
         FROM tx_out AS txo
         INNER JOIN ma_tx_out AS mto ON mto.tx_out_id = txo.id
         WHERE mto.ident = ANY(_asset_id_list)
           AND txo.consumed_by_tx_id IS NULL
-      ),
-      _assets AS (
-        SELECT
-          txol.id,
-          JSONB_AGG(CASE WHEN ma.policy IS NULL THEN NULL
-            ELSE JSONB_BUILD_OBJECT(
-            'policy_id', ENCODE(ma.policy, 'hex'),
-            'asset_name', ENCODE(ma.name, 'hex'),
-            'fingerprint', ma.fingerprint,
-            'decimals', aic.decimals,
-            'quantity', mto.quantity::text
-            )
-          END) as assets
-        FROM _txo_list AS txol
-        INNER JOIN ma_tx_out AS mto ON mto.tx_out_id = txol.id
-        LEFT JOIN multi_asset AS ma ON ma.id = mto.ident
-        LEFT JOIN grest.asset_info_cache AS aic ON aic.asset_id = ma.id
-        GROUP BY txol.id
       )
     SELECT
       ENCODE(tx.hash, 'hex')::text AS tx_hash,
@@ -91,16 +73,33 @@ BEGIN
       END) AS reference_script,
       CASE
         WHEN _extended = false THEN NULL
-        ELSE COALESCE(assets, JSONB_BUILD_ARRAY())
+        ELSE COALESCE(
+          (
+            SELECT
+            JSONB_AGG(CASE
+              WHEN ma.policy IS NULL THEN NULL
+              ELSE JSONB_BUILD_OBJECT(
+                'policy_id', ENCODE(ma.policy, 'hex'),
+                'asset_name', ENCODE(ma.name, 'hex'),
+                'fingerprint', ma.fingerprint,
+                'decimals', aic.decimals,
+                'quantity', mto.quantity::text
+                )
+            END) as assets
+            FROM ma_tx_out AS mto
+            INNER JOIN multi_asset AS ma ON mto.tx_out_id = my_txo_list.id and ma.id = mto.ident
+            left JOIN grest.asset_info_cache AS aic ON aic.asset_id = ma.id
+            GROUP BY my_txo_list.id
+          ), JSONB_BUILD_ARRAY())
       END AS asset_list,
       (CASE
         WHEN tx_out.consumed_by_tx_id IS NULL THEN false
         ELSE true
       END) AS is_spent
-    FROM tx_out
+    FROM _txo_list AS my_txo_list
+    INNER JOIN tx_out on tx_out.id = my_txo_list.id
     INNER JOIN tx ON tx_out.tx_id = tx.id
     INNER JOIN address AS a ON a.id = tx_out.address_id
-    INNER JOIN _assets ON tx_out.id = _assets.id
     LEFT JOIN stake_address AS sa ON tx_out.stake_address_id = sa.id
     LEFT JOIN block AS b ON b.id = tx.block_id
     LEFT JOIN datum ON datum.id = tx_out.inline_datum_id