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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
SET sql_mode=IF(@@version LIKE '%MariaDB%', 'TIME_ROUND_FRACTIONAL', '');
SET @default_sql_mode=@@sql_mode;
#
# DATE: SET
#
CREATE TABLE t1 (a DATE, b DATETIME(4));
INSERT INTO t1 VALUES(NULL,'2000-12-31 23:59:59.9999');
UPDATE t1 SET a=b;
Warnings:
Note 1265 Data truncated for column 'a' at row 1
SELECT a FROM t1;
a
2000-12-31
DROP TABLE t1;
CREATE TABLE t1 (a DATE, b VARCHAR(64));
INSERT INTO t1 VALUES(NULL,'2000-12-31 23:59:59.9999');
INSERT INTO t1 VALUES(NULL,'2000-12-31 23:59:59.9999999');
UPDATE t1 SET a=b;
Warnings:
Note 1265 Data truncated for column 'a' at row 1
Note 1265 Data truncated for column 'a' at row 2
SELECT a FROM t1;
a
2000-12-31
2000-12-31
DROP TABLE t1;
CREATE TABLE t1 (a DATE, b DECIMAL(38,10));
INSERT INTO t1 VALUES(NULL,20001231235959.9999);
INSERT INTO t1 VALUES(NULL,20001231235959.9999999);
UPDATE t1 SET a=b;
Warnings:
Note 1265 Data truncated for column 'a' at row 1
Note 1265 Data truncated for column 'a' at row 2
SELECT a FROM t1;
a
2000-12-31
2000-12-31
DROP TABLE t1;
#
# DATE: ALTER
#
CREATE TABLE t1 (a DATETIME(4));
INSERT INTO t1 VALUES('2000-12-31 23:59:59.9999');
ALTER TABLE t1 MODIFY a DATE;
Warnings:
Note 1265 Data truncated for column 'a' at row 1
SELECT a FROM t1;
a
2000-12-31
DROP TABLE t1;
CREATE TABLE t1 (a VARCHAR(64));
INSERT INTO t1 VALUES('2000-12-31 23:59:59.9999');
INSERT INTO t1 VALUES('2000-12-31 23:59:59.9999999');
ALTER TABLE t1 MODIFY a DATE;
Warnings:
Note 1265 Data truncated for column 'a' at row 1
Note 1292 Truncated incorrect datetime value: '2000-12-31 23:59:59.9999999'
Note 1265 Data truncated for column 'a' at row 2
SELECT a FROM t1;
a
2000-12-31
2000-12-31
DROP TABLE t1;
CREATE TABLE t1 (a DECIMAL(38,10));
INSERT INTO t1 VALUES(20001231235959.9999);
INSERT INTO t1 VALUES(20001231235959.9999999);
ALTER TABLE t1 MODIFY a DATE;
Warnings:
Note 1265 Data truncated for column 'a' at row 1
Note 1265 Data truncated for column 'a' at row 2
SELECT a FROM t1;
a
2000-12-31
2000-12-31
DROP TABLE t1;
#
# DATE: CAST
#
CREATE TABLE t1 (a DATETIME(4));
INSERT INTO t1 VALUES('2000-12-31 23:59:59.9999');
SELECT a, CAST(a AS DATE) FROM t1;
a CAST(a AS DATE)
2000-12-31 23:59:59.9999 2000-12-31
DROP TABLE t1;
CREATE TABLE t1 (a VARCHAR(64));
INSERT INTO t1 VALUES('2000-12-31 23:59:59.9999');
INSERT INTO t1 VALUES('2000-12-31 23:59:59.9999999');
SELECT a, CAST(a AS DATE) FROM t1;
a CAST(a AS DATE)
2000-12-31 23:59:59.9999 2000-12-31
2000-12-31 23:59:59.9999999 2000-12-31
Warnings:
Note 1292 Truncated incorrect datetime value: '2000-12-31 23:59:59.9999999'
DROP TABLE t1;
CREATE TABLE t1 (a DECIMAL(38,10));
INSERT INTO t1 VALUES(20001231235959.9999);
INSERT INTO t1 VALUES(20001231235959.9999999);
SELECT a, CAST(a AS DATE) FROM t1;
a CAST(a AS DATE)
20001231235959.9999000000 2000-12-31
20001231235959.9999999000 2000-12-31
DROP TABLE t1;
#
# Equal field propagation
#
CREATE TABLE t1 (a DATE);
INSERT INTO t1 VALUES (20010101);
INSERT INTO t1 VALUES (20010102);
SELECT * FROM t1 WHERE a= 20010101235959.9999999;
a
2001-01-02
SELECT * FROM t1 WHERE a='2001-01-01 23:59:59.9999999';
a
2001-01-02
Warnings:
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
SELECT * FROM t1 WHERE a='2001-01-01 23:59:59.9999999' AND a>='2001-01-01 23:59:59.9999999';
a
2001-01-02
Warnings:
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
SELECT * FROM t1 WHERE a='2001-01-01 23:59:59.9999999' AND CONCAT(a)='2001-01-02';
a
2001-01-02
Warnings:
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='2001-01-01 23:59:59.9999999' AND a>='2001-01-01 23:59:59.9999999';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = DATE'2001-01-02'
EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='2001-01-01 23:59:59.9999999' AND CONCAT(a)='2001-01-02';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = DATE'2001-01-02'
DROP TABLE t1;
#
# Comparing non-temporal to DATE
#
# Although conversion from non-temporal to DATE (e.g. on SET) does not round,
# comparison between non-temporal to DATE is performed as DATETIME.
# So rounding does happen here.
CREATE TABLE t1 (a VARCHAR(64));
INSERT t1 VALUES ('2001-01-01 23:59:59.9999999');
SELECT * FROM t1 WHERE a=DATE'2001-01-02';
a
2001-01-01 23:59:59.9999999
Warnings:
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
SELECT * FROM t1 WHERE CONCAT(a)=DATE'2001-01-02';
a
2001-01-01 23:59:59.9999999
Warnings:
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
SELECT * FROM t1 WHERE COALESCE(a)=DATE'2001-01-02';
a
2001-01-01 23:59:59.9999999
Warnings:
Note 1292 Truncated incorrect datetime value: '2001-01-01 23:59:59.9999999'
DROP TABLE t1;
CREATE TABLE t1 (a DECIMAL(32,7));
INSERT t1 VALUES (20010101235959.9999999);
SELECT * FROM t1 WHERE a=DATE'2001-01-02';
a
20010101235959.9999999
SELECT * FROM t1 WHERE COALESCE(a)=DATE'2001-01-02';
a
20010101235959.9999999
DROP TABLE t1;
|