From 903be88f7bd640077893336b3a50ba91687e62bd Mon Sep 17 00:00:00 2001
From: Kipchirchir Sigei <arapgodsmack@gmail.com>
Date: Fri, 24 Nov 2023 10:19:44 +0300
Subject: [PATCH] Create logger instannce index on (xform_id, id)

Signed-off-by: Kipchirchir Sigei <arapgodsmack@gmail.com>
---
 .../0011_add_xform_id_instance_id_idx.py      | 31 +++++++++++++++++++
 onadata/apps/logger/models/instance.py        |  1 +
 2 files changed, 32 insertions(+)
 create mode 100644 onadata/apps/logger/migrations/0011_add_xform_id_instance_id_idx.py

diff --git a/onadata/apps/logger/migrations/0011_add_xform_id_instance_id_idx.py b/onadata/apps/logger/migrations/0011_add_xform_id_instance_id_idx.py
new file mode 100644
index 0000000000..9b5764c6ea
--- /dev/null
+++ b/onadata/apps/logger/migrations/0011_add_xform_id_instance_id_idx.py
@@ -0,0 +1,31 @@
+# Generated by Django 3.2.20 on 2023-11-23 16:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    atomic = False
+
+    dependencies = [
+        ('logger', '0010_auto_20230921_0346'),
+    ]
+
+    operations = [
+        migrations.SeparateDatabaseAndState(
+            database_operations=[
+                # index the json date fields
+                migrations.RunSQL(
+                    sql='CREATE INDEX CONCURRENTLY "logger_instance_id_xform_id_index" ON "logger_instance" ("xform_id", "id");',
+                    reverse_sql='DROP INDEX "logger_instance_id_xform_id_index";',
+                ),
+            ],
+            state_operations=[
+                migrations.AddIndex(
+                    model_name="instance",
+                    index=models.Index(
+                        fields=["xform_id", "id"], name="logger_instance_id_xform_id_index"
+                    ),
+                ),
+            ],
+        )
+    ]
diff --git a/onadata/apps/logger/models/instance.py b/onadata/apps/logger/models/instance.py
index fe32914da2..2c0fd87d12 100644
--- a/onadata/apps/logger/models/instance.py
+++ b/onadata/apps/logger/models/instance.py
@@ -685,6 +685,7 @@ class Meta:
             models.Index(fields=["date_created"]),
             models.Index(fields=["date_modified"]),
             models.Index(fields=["deleted_at"]),
+            models.Index(fields=["xform_id", "id"]),
         ]
 
     @classmethod