1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
import mango
import copy
DOCS = [
{
"_id": "_design/my-design-doc",
},
{
"_id": "54af50626de419f5109c962f",
"user_id": 0,
"age": 10,
"name": "Jimi",
"location": "UK",
"number": 4
},
{
"_id": "54af50622071121b25402dc3",
"user_id": 1,
"age": 12,
"name": "Eddie",
"location": "ZAR",
"number": 2
},
{
"_id": "54af50622071121b25402dc6",
"user_id": 1,
"age": 6,
"name": "Harry",
"location": "US",
"number":8
},
{
"_id": "54af50622071121b25402dc9",
"name": "Eddie",
"occupation": "engineer",
"number":7
},
]
class ChooseCorrectIndexForDocs(mango.DbPerClass):
def setUp(self):
self.db.recreate()
self.db.save_docs(copy.deepcopy(DOCS))
def test_choose_index_with_one_field_in_index(self):
self.db.create_index(["name", "age", "user_id"], ddoc="aaa")
self.db.create_index(["name"], ddoc="zzz")
explain = self.db.find({"name": "Eddie"}, explain=True)
self.assertEqual(explain["index"]["ddoc"], '_design/zzz')
def test_choose_index_with_two(self):
self.db.create_index(["name", "age", "user_id"], ddoc="aaa")
self.db.create_index(["name", "age"], ddoc="bbb")
self.db.create_index(["name"], ddoc="zzz")
explain = self.db.find({"name": "Eddie", "age":{"$gte": 12}}, explain=True)
self.assertEqual(explain["index"]["ddoc"], '_design/bbb')
def test_choose_index_alphabetically(self):
self.db.create_index(["name", "age", "user_id"], ddoc="aaa")
self.db.create_index(["name", "age", "location"], ddoc="bbb")
self.db.create_index(["name"], ddoc="zzz")
explain = self.db.find({"name": "Eddie", "age": {"$gte": 12}}, explain=True)
self.assertEqual(explain["index"]["ddoc"], '_design/aaa')
def test_choose_index_most_accurate(self):
self.db.create_index(["name", "location", "user_id"], ddoc="aaa")
self.db.create_index(["name", "age", "user_id"], ddoc="bbb")
self.db.create_index(["name"], ddoc="zzz")
explain = self.db.find({"name": "Eddie", "age": {"$gte": 12}}, explain=True)
self.assertEqual(explain["index"]["ddoc"], '_design/bbb')
def test_choose_index_most_accurate_in_memory_selector(self):
self.db.create_index(["name", "location", "user_id"], ddoc="aaa")
self.db.create_index(["name", "age", "user_id"], ddoc="bbb")
self.db.create_index(["name"], ddoc="zzz")
explain = self.db.find({"name": "Eddie", "number": {"$lte": 12}}, explain=True)
self.assertEqual(explain["index"]["ddoc"], '_design/zzz')
def test_warn_on_full_db_scan(self):
selector = {"not_indexed":"foo"}
explain_resp = self.db.find(selector, explain=True, return_raw=True)
self.assertEqual(explain_resp["index"]["type"], "special")
resp = self.db.find(selector, return_raw=True)
self.assertEqual(resp["warning"], "no matching index found, create an index to optimize query time")
def test_chooses_idxA(self):
DOCS2 = [
{"a":1, "b":1, "c":1},
{"a":1000, "d" : 1000, "e": 1000}
]
self.db.save_docs(copy.deepcopy(DOCS2))
self.db.create_index(["a", "b", "c"])
self.db.create_index(["a", "d", "e"])
explain = self.db.find({"a": {"$gt": 0}, "b": {"$gt": 0}, "c": {"$gt": 0}}, explain=True)
self.assertEqual(explain["index"]["def"]["fields"], [{'a': 'asc'}, {'b': 'asc'}, {'c': 'asc'}])
|
