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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
# This file is part of python-sql. The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
import unittest
from sql import (
Literal, Matched, MatchedDelete, MatchedUpdate, Merge, NotMatched,
NotMatchedInsert, Table, With)
class TestMerge(unittest.TestCase):
target = Table('t')
source = Table('s')
def test_merge(self):
query = self.target.merge(
self.source, self.target.c1 == self.source.c2, Matched())
self.assertEqual(
str(query),
'MERGE INTO "t" AS "a" USING "s" AS "b" '
'ON ("a"."c1" = "b"."c2") '
'WHEN MATCHED THEN DO NOTHING')
self.assertEqual(query.params, ())
def test_merge_invalid_target(self):
with self.assertRaises(ValueError):
Merge('foo', self.source, Literal(True))
def test_merge_invalid_source(self):
with self.assertRaises(ValueError):
self.target.merge('foo', Literal(True))
def test_merge_invalid_condition(self):
with self.assertRaises(ValueError):
self.target.merge(self.source, 'foo')
def test_merge_invalid_whens(self):
with self.assertRaises(ValueError):
self.target.merge(self.source, Literal(True), 'foo')
def test_condition(self):
query = self.target.merge(
self.source,
(self.target.c1 == self.source.c2) & (self.target.c3 == 42),
Matched())
self.assertEqual(
str(query),
'MERGE INTO "t" AS "a" USING "s" AS "b" '
'ON (("a"."c1" = "b"."c2") AND ("a"."c3" = %s)) '
'WHEN MATCHED THEN DO NOTHING')
self.assertEqual(query.params, (42,))
def test_matched(self):
query = self.target.merge(
self.source, self.target.c1 == self.source.c2,
Matched((self.source.c3 == 42)
& (self.target.c4 == self.source.c5)))
self.assertEqual(
str(query),
'MERGE INTO "t" AS "a" USING "s" AS "b" '
'ON ("a"."c1" = "b"."c2") '
'WHEN MATCHED '
'AND (("b"."c3" = %s) AND ("a"."c4" = "b"."c5")) '
'THEN DO NOTHING')
self.assertEqual(query.params, (42,))
def test_matched_update(self):
query = self.target.merge(
self.source, self.target.c1 == self.source.c2,
MatchedUpdate(
[self.target.c1, self.target.c2],
[self.target.c1 + self.source.c2, 42]))
self.assertEqual(
str(query),
'MERGE INTO "t" AS "a" USING "s" AS "b" '
'ON ("a"."c1" = "b"."c2") '
'WHEN MATCHED THEN '
'UPDATE SET "c1" = ("a"."c1" + "b"."c2"), "c2" = %s')
self.assertEqual(query.params, (42,))
def test_matched_delete(self):
query = self.target.merge(
self.source, self.target.c1 == self.source.c2, MatchedDelete())
self.assertEqual(
str(query),
'MERGE INTO "t" AS "a" USING "s" AS "b" '
'ON ("a"."c1" = "b"."c2") '
'WHEN MATCHED THEN DELETE')
self.assertEqual(query.params, ())
def test_not_matched(self):
query = self.target.merge(
self.source, self.target.c1 == self.source.c2, NotMatched())
self.assertEqual(
str(query),
'MERGE INTO "t" AS "a" USING "s" AS "b" '
'ON ("a"."c1" = "b"."c2") '
'WHEN NOT MATCHED THEN DO NOTHING')
self.assertEqual(query.params, ())
def test_not_matched_insert(self):
query = self.target.merge(
self.source, self.target.c1 == self.source.c2,
NotMatchedInsert(
[self.target.c1, self.target.c2],
[self.source.c3, self.source.c4]))
self.assertEqual(
str(query),
'MERGE INTO "t" AS "a" USING "s" AS "b" '
'ON ("a"."c1" = "b"."c2") '
'WHEN NOT MATCHED THEN '
'INSERT ("c1", "c2") VALUES ("b"."c3", "b"."c4")')
self.assertEqual(query.params, ())
def test_not_matched_insert_default(self):
query = self.target.merge(
self.source, self.target.c1 == self.source.c2,
NotMatchedInsert([self.target.c1, self.target.c2], None))
self.assertEqual(
str(query),
'MERGE INTO "t" AS "a" USING "s" AS "b" '
'ON ("a"."c1" = "b"."c2") '
'WHEN NOT MATCHED THEN '
'INSERT ("c1", "c2") DEFAULT VALUES')
self.assertEqual(query.params, ())
def test_matched_invalid_condition(self):
with self.assertRaises(ValueError):
Matched('foo')
def test_matched_values_invalid_columns(self):
with self.assertRaises(ValueError):
MatchedUpdate('foo', [])
def test_with(self):
t1 = Table('t1')
w = With(query=t1.select(where=t1.c2 == 42))
source = w.select()
query = self.target.merge(
source, self.target.c1 == source.c2, Matched(), with_=[w])
self.assertEqual(
str(query),
'WITH "a" AS (SELECT * FROM "t1" AS "d" WHERE ("d"."c2" = %s)) '
'MERGE INTO "t" AS "b" '
'USING (SELECT * FROM "a" AS "a") AS "c" '
'ON ("b"."c1" = "c"."c2") '
'WHEN MATCHED THEN DO NOTHING')
self.assertEqual(query.params, (42,))
|
