pgroonga: Upgrade to PGroonga 2 API.

pgroonga/migrations/0003_v2_api_upgrade.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+from django.db import models, migrations
+from django.contrib.postgres import operations
+from django.conf import settings
+
+
+class Migration(migrations.Migration):
+    atomic = False
+
+    dependencies = [
+        ('pgroonga', '0002_html_escape_subject'),
+    ]
+
+    database_setting = settings.DATABASES["default"]
+    operations = [
+        migrations.RunSQL(["""
+ALTER ROLE %(USER)s SET search_path TO %(SCHEMA)s,public;
+
+SET search_path = %(SCHEMA)s,public;
+
+DROP INDEX zerver_message_search_pgroonga;
+""" % database_setting, """
+
+CREATE INDEX CONCURRENTLY zerver_message_search_pgroonga ON zerver_message
+  USING pgroonga(search_pgroonga pgroonga_text_full_text_search_ops_v2);
+"""],
+                          ["""
+ALTER ROLE %(USER)s SET search_path TO %(SCHEMA)s,public,pgroonga,pg_catalog;
+
+SET search_path = %(SCHEMA)s,public,pgroonga,pg_catalog;
+
+DROP INDEX zerver_message_search_pgroonga;
+""" % database_setting, """
+
+CREATE INDEX CONCURRENTLY zerver_message_search_pgroonga ON zerver_message
+  USING pgroonga(search_pgroonga pgroonga.text_full_text_search_ops);
+        """])
+    ]