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
|
################################################################################
# inc/vcol_partition.inc #
# #
# Purpose: #
# Testing partitioning tables with virtual columns. #
# #
# #
# #
#------------------------------------------------------------------------------#
# Original Author: Andrey Zhakov #
# Original Date: 2008-09-04 #
# Change Author: Oleksandr Byelkin (Monty program Ab)
# Date: 2009-03-24
# Change: Syntax changed
################################################################################
--source include/have_partition.inc
--disable_warnings
drop table if exists t1;
--enable_warnings
--echo # Case 1. Partitioning by RANGE based on a non-stored virtual column.
CREATE TABLE t1 (
a DATE NOT NULL,
b int as (year(a))
)
PARTITION BY RANGE( b ) (
PARTITION p0 VALUES LESS THAN (2006),
PARTITION p2 VALUES LESS THAN (2008)
);
insert into t1 values ('2006-01-01',default);
insert into t1 values ('2007-01-01',default);
insert into t1 values ('2005-01-01',default);
insert into t1 (a) values ('2007-01-02');
select * from t1;
select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
--echo # Modify the expression of virtual column b
ALTER TABLE t1 modify b int as (year(a)-1);
select * from t1;
select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
drop table t1;
--echo # Case 2. Partitioning by LIST based on a stored virtual column.
CREATE TABLE t1 (a int, b int as (a % 3 ) persistent)
PARTITION BY LIST (a+1)
(PARTITION p1 VALUES IN (1), PARTITION p2 VALUES IN (2));
insert into t1 values (1,default);
select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
select * from t1;
#
# NOTE: The following tests are currently failing due to a
# [suspected] bug in the existing partition functionality.
# Here is what was observed when using mysqld compiled prior
# to adding the virtual column functionality.
# mysql> create table t1 (a int) partition by list (a)
# (partition p1 values in (1), partition p2 values in (2));
# Query OK, 0 rows affected (0.00 sec)
#
# mysql> insert into t1 values (1), (1), (2);
# Query OK, 3 rows affected (0.00 sec)
# Records: 3 Duplicates: 0 Warnings: 0
#
# mysql> select * from t1;
# +------+
# | a |
# +------+
# | 1 |
# | 1 |
# | 2 |
# +------+
# 3 rows in set (0.00 sec)
#
# mysql> alter table t1 reorganize partition p1 into
# (partition p1 values in (3));
# Query OK, 2 rows affected (3.90 sec)
# Records: 2 Duplicates: 2 Warnings: 0
#
# mysql> select * from t1;
# +------+
# | a |
# +------+
# | 2 | <- Two row have been lost!!!
# +------+
# 1 row in set (0.00 sec)
#
#alter table t1 change b b int as ((a % 3)+1) persistent;
#--error ER_NO_PARTITION_FOR_GIVEN_VALUE
#alter table t1 change b b int as (a % 2) persistent;
#select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
select * from t1;
drop table t1;
--echo # Case 3. Partitioning by HASH based on a non-stored virtual column.
CREATE TABLE t1 (
a DATE NOT NULL,
b int as (year(a))
)
PARTITION BY HASH( b % 3 ) PARTITIONS 3;
insert into t1 values ('2005-01-01',default);
insert into t1 values ('2006-01-01',default);
select * from t1;
select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
--echo # Modify the expression of virtual column b
ALTER TABLE t1 modify b int as (year(a)-1);
select * from t1;
select partition_name,table_rows,data_length from information_schema.partitions where table_name = 't1';
drop table t1;
#
# Restrictions when partitioned
#
--error ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR
create table t1 (a int, b datetime as (now())) partition by hash(b+1) partitions 3;
--error ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR
create table t1 (a int, b varchar(100) as (user())) partition by hash(b+1) partitions 3;
--error ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR
create table t1 (a int, b double as (rand())) partition by hash(b+1) partitions 3;
|
