diff --git a/pgroonga/migrations/0003_v2_api_upgrade.py b/pgroonga/migrations/0003_v2_api_upgrade.py
new file mode 100644
index 0000000000..476e568eec
--- /dev/null
+++ b/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);
+        """])
+    ]
diff --git a/zerver/tests/test_narrow.py b/zerver/tests/test_narrow.py
index d8056343cf..89fdbc6d84 100644
--- a/zerver/tests/test_narrow.py
+++ b/zerver/tests/test_narrow.py
@@ -262,13 +262,13 @@ class NarrowBuilderTest(ZulipTestCase):
     @override_settings(USING_PGROONGA=True)
     def test_add_term_using_search_operator_pgroonga(self) -> None:
         term = dict(operator='search', operand='"french fries"')
-        self._do_add_term_test(term, 'WHERE search_pgroonga @@ escape_html(:escape_html_1)')
+        self._do_add_term_test(term, 'WHERE search_pgroonga &@~ escape_html(:escape_html_1)')
 
     @override_settings(USING_PGROONGA=True)
     def test_add_term_using_search_operator_and_negated_pgroonga(
             self) -> None:  # NEGATED
         term = dict(operator='search', operand='"french fries"', negated=True)
-        self._do_add_term_test(term, 'WHERE NOT (search_pgroonga @@ escape_html(:escape_html_1))')
+        self._do_add_term_test(term, 'WHERE NOT (search_pgroonga &@~ escape_html(:escape_html_1))')
 
     def test_add_term_using_has_operator_and_attachment_operand(self) -> None:
         term = dict(operator='has', operand='attachment')
diff --git a/zerver/views/messages.py b/zerver/views/messages.py
index aae431219d..057ba56cd3 100644
--- a/zerver/views/messages.py
+++ b/zerver/views/messages.py
@@ -357,15 +357,15 @@ class NarrowBuilder:
 
     def _by_search_pgroonga(self, query: Query, operand: str,
                             maybe_negate: ConditionTransform) -> Query:
-        match_positions_character = func.pgroonga.match_positions_character
-        query_extract_keywords = func.pgroonga.query_extract_keywords
+        match_positions_character = func.pgroonga_match_positions_character
+        query_extract_keywords = func.pgroonga_query_extract_keywords
         operand_escaped = func.escape_html(operand)
         keywords = query_extract_keywords(operand_escaped)
         query = query.column(match_positions_character(column("rendered_content"),
                                                        keywords).label("content_matches"))
         query = query.column(match_positions_character(func.escape_html(column("subject")),
                                                        keywords).label("subject_matches"))
-        condition = column("search_pgroonga").op("@@")(operand_escaped)
+        condition = column("search_pgroonga").op("&@~")(operand_escaped)
         return query.where(maybe_negate(condition))
 
     def _by_search_tsearch(self, query: Query, operand: str,
diff --git a/zproject/settings.py b/zproject/settings.py
index 17587c17b2..0c89bec919 100644
--- a/zproject/settings.py
+++ b/zproject/settings.py
@@ -598,16 +598,6 @@ elif REMOTE_POSTGRES_HOST != '':
     else:
         DATABASES['default']['OPTIONS']['sslmode'] = 'verify-full'
 
-if USING_PGROONGA:
-    # We need to have "pgroonga" schema before "pg_catalog" schema in
-    # the PostgreSQL search path, because "pgroonga" schema overrides
-    # the "@@" operator from "pg_catalog" schema, and "pg_catalog"
-    # schema is searched first if not specified in the search path.
-    # See also: http://www.postgresql.org/docs/current/static/runtime-config-client.html
-    pg_options = '-c search_path=%(SCHEMA)s,zulip,public,pgroonga,pg_catalog' % \
-        DATABASES['default']
-    DATABASES['default']['OPTIONS']['options'] = pg_options
-
 ########################################################################
 # RABBITMQ CONFIGURATION
 ########################################################################
diff --git a/zproject/test_settings.py b/zproject/test_settings.py
index 207fb2454b..ab7167ce08 100644
--- a/zproject/test_settings.py
+++ b/zproject/test_settings.py
@@ -34,15 +34,6 @@ DATABASES["default"] = {
     "TEST_NAME": "django_zulip_tests",
     "OPTIONS": {"connection_factory": TimeTrackingConnection},
 }
-if USING_PGROONGA:
-    # We need to have "pgroonga" schema before "pg_catalog" schema in
-    # the PostgreSQL search path, because "pgroonga" schema overrides
-    # the "@@" operator from "pg_catalog" schema, and "pg_catalog"
-    # schema is searched first if not specified in the search path.
-    # See also: http://www.postgresql.org/docs/current/static/runtime-config-client.html
-    pg_options = '-c search_path=%(SCHEMA)s,zulip,public,pgroonga,pg_catalog' % \
-        DATABASES['default']
-    DATABASES['default']['OPTIONS']['options'] = pg_options
 
 if "TORNADO_SERVER" in os.environ:
     # This covers the Casper test suite case