Add pagination cases of query without limit (#20062)

Signed-off-by: Nnico <cheng.yuan@zilliz.com>
Signed-off-by: Nnico <cheng.yuan@zilliz.com>

tests/python_client/testcases/test_index.py

@@ -215,11 +215,10 @@ class TestIndexOperation(TestcaseBase):
         assert collection_w.indexes[0].params["index_type"] == default_index_params["index_type"]
 
     @pytest.mark.tags(CaseLabel.L1)
-    @pytest.mark.xfail(reason="issue 19972")
     def test_index_create_indexes_for_different_fields(self):
         """
         target: Test create indexes for different fields
-        method: create two different indexes
+        method: create two different indexes with default index name
         expected: create successfully
         """
         collection_w = self.init_collection_general(prefix, True, is_index=True)[0]

tests/python_client/testcases/test_query.py

@@ -997,6 +997,28 @@ class TestQueryParams(TestcaseBase):
         collection_w.query(default_term_expr, params=query_params,
                            check_task=CheckTasks.check_query_results, check_items={exp_res: res})
 
+    @pytest.mark.tags(CaseLabel.L1)
+    def test_query_pagination_without_limit(self, offset):
+        """
+        target: test query pagination without limit
+        method: create collection and query with pagination params(only offset),
+                compare the result with query without pagination params
+        expected: query successfully
+        """
+        collection_w, vectors = self.init_collection_general(prefix, insert_data=True)[0:2]
+        int_values = vectors[0][ct.default_int64_field_name].values.tolist()
+        pos = 10
+        term_expr = f'{ct.default_int64_field_name} in {int_values[offset: pos + offset]}'
+        res = vectors[0].iloc[offset:pos + offset, :1].to_dict('records')
+        query_params = {"offset": offset}
+        query_res = collection_w.query(term_expr, params=query_params,
+                                       check_task=CheckTasks.check_query_results,
+                                       check_items={exp_res: res})[0]
+        res = collection_w.query(term_expr,
+                                 check_task=CheckTasks.check_query_results,
+                                 check_items={exp_res: res})[0]
+        assert query_res == res
+
     @pytest.mark.tags(CaseLabel.L2)
     @pytest.mark.xfail(reason="issue #19482")
     @pytest.mark.parametrize("limit", ["12 s", " ", [0, 1], {2}])