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1
by brian
clean slate |
1 |
drop table if exists t0, t1, t2, t3, t4;
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2 |
create table t1 (oref int, grp int, ie int) ;
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3 |
insert into t1 (oref, grp, ie) values
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4 |
(1, 1, 1),
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5 |
(1, 1, 1),
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6 |
(1, 2, NULL),
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7 |
(2, 1, 3),
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8 |
(3, 1, 4),
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9 |
(3, 2, NULL);
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10 |
create table t2 (oref int, a int);
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11 |
insert into t2 values
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12 |
(1, 1),
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13 |
(2, 2),
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14 |
(3, 3),
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15 |
(4, NULL),
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16 |
(2, NULL);
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17 |
select a, oref, a in (select max(ie)
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18 |
from t1 where oref=t2.oref group by grp) Z from t2;
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19 |
a oref Z
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20 |
1 1 1
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21 |
2 2 0
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22 |
3 3 NULL
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23 |
NULL 4 0
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24 |
NULL 2 NULL
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25 |
explain extended
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26 |
select a, oref, a in (select max(ie)
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27 |
from t1 where oref=t2.oref group by grp) Z from t2;
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28 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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29 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00
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30 |
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
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31 |
Warnings:
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32 |
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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33 |
Note 1003 select "test"."t2"."a" AS "a","test"."t2"."oref" AS "oref",<in_optimizer>("test"."t2"."a",<exists>(select max("test"."t1"."ie") AS "max(ie)" from "test"."t1" where ("test"."t1"."oref" = "test"."t2"."oref") group by "test"."t1"."grp" having trigcond((<cache>("test"."t2"."a") = <ref_null_helper>(max("test"."t1"."ie")))))) AS "Z" from "test"."t2"
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34 |
explain extended
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35 |
select a, oref from t2
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36 |
where a in (select max(ie) from t1 where oref=t2.oref group by grp);
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37 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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38 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
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39 |
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
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40 |
Warnings:
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41 |
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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42 |
Note 1003 select "test"."t2"."a" AS "a","test"."t2"."oref" AS "oref" from "test"."t2" where <in_optimizer>("test"."t2"."a",<exists>(select max("test"."t1"."ie") AS "max(ie)" from "test"."t1" where ("test"."t1"."oref" = "test"."t2"."oref") group by "test"."t1"."grp" having (<cache>("test"."t2"."a") = <ref_null_helper>(max("test"."t1"."ie")))))
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43 |
select a, oref, a in (
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44 |
select max(ie) from t1 where oref=t2.oref group by grp union
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45 |
select max(ie) from t1 where oref=t2.oref group by grp
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46 |
) Z from t2;
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47 |
a oref Z
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48 |
1 1 1
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49 |
2 2 0
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50 |
3 3 NULL
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51 |
NULL 4 0
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52 |
NULL 2 NULL
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53 |
create table t3 (a int);
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54 |
insert into t3 values (NULL), (NULL);
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55 |
flush status;
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56 |
select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
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57 |
a in (select max(ie) from t1 where oref=4 group by grp)
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58 |
0
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59 |
0
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60 |
show status like 'Handler_read_rnd_next';
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61 |
Variable_name Value
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62 |
Handler_read_rnd_next 11
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63 |
select ' ^ This must show 11' Z;
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Z
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65 |
^ This must show 11
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66 |
explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3;
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67 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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68 |
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00
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69 |
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
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70 |
Warnings:
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71 |
Note 1003 select <in_optimizer>("test"."t3"."a",<exists>(select max("test"."t1"."ie") AS "max(ie)" from "test"."t1" where ("test"."t1"."oref" = 4) group by "test"."t1"."grp" having trigcond((<cache>("test"."t3"."a") = <ref_null_helper>(max("test"."t1"."ie")))))) AS "a in (select max(ie) from t1 where oref=4 group by grp)" from "test"."t3"
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72 |
drop table t1, t2, t3;
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73 |
create table t1 (a int, oref int, key(a));
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74 |
insert into t1 values
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75 |
(1, 1),
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76 |
(1, NULL),
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77 |
(2, 3),
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78 |
(2, NULL),
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79 |
(3, NULL);
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80 |
create table t2 (a int, oref int);
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81 |
insert into t2 values (1, 1), (2,2), (NULL, 3), (NULL, 4);
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82 |
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
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83 |
oref a Z
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84 |
1 1 1
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85 |
2 2 0
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86 |
3 NULL NULL
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87 |
4 NULL 0
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88 |
explain extended
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89 |
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
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90 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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91 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 4 100.00
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201
by Brian Aker
Convert default engine to Innodb |
92 |
2 DEPENDENT SUBQUERY t1 ALL a NULL NULL NULL 5 80.00 Using where
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1
by brian
clean slate |
93 |
Warnings:
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94 |
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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201
by Brian Aker
Convert default engine to Innodb |
95 |
Note 1003 select "test"."t2"."oref" AS "oref","test"."t2"."a" AS "a",<in_optimizer>("test"."t2"."a",<exists>(select 1 AS "Not_used" from "test"."t1" where (("test"."t1"."oref" = "test"."t2"."oref") and trigcond(((<cache>("test"."t2"."a") = "test"."t1"."a") or isnull("test"."t1"."a")))) having trigcond(<is_not_null_test>("test"."t1"."a")))) AS "Z" from "test"."t2"
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1
by brian
clean slate |
96 |
flush status;
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97 |
select oref, a from t2 where a in (select a from t1 where oref=t2.oref);
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98 |
oref a
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99 |
1 1
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100 |
show status like '%Handler_read_rnd_next';
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101 |
Variable_name Value
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102 |
Handler_read_rnd_next 11
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103 |
delete from t2;
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104 |
insert into t2 values (NULL, 0),(NULL, 0), (NULL, 0), (NULL, 0);
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105 |
flush status;
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106 |
select oref, a, a in (select a from t1 where oref=t2.oref) Z from t2;
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107 |
oref a Z
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108 |
0 NULL 0
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109 |
0 NULL 0
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110 |
0 NULL 0
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111 |
0 NULL 0
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112 |
show status like '%Handler_read%';
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113 |
Variable_name Value
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201
by Brian Aker
Convert default engine to Innodb |
114 |
Handler_read_first 5
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115 |
Handler_read_key 10
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1
by brian
clean slate |
116 |
Handler_read_next 0
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117 |
Handler_read_prev 0
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118 |
Handler_read_rnd 0
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119 |
Handler_read_rnd_next 29
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120 |
select 'No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.' Z;
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121 |
Z
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122 |
No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.
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123 |
drop table t1, t2;
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124 |
create table t1 (a int, b int, primary key (a));
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125 |
insert into t1 values (1,1), (3,1),(100,1);
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126 |
create table t2 (a int, b int);
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127 |
insert into t2 values (1,1),(2,1),(NULL,1),(NULL,0);
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128 |
select a,b, a in (select a from t1 where t1.b = t2.b) Z from t2 ;
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129 |
a b Z
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130 |
1 1 1
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131 |
2 1 0
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132 |
NULL 1 NULL
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133 |
NULL 0 0
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134 |
drop table t1, t2;
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135 |
create table t1 (a int, b int, key(a));
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136 |
insert into t1 values
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137 |
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
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138 |
create table t2 like t1;
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139 |
insert into t2 select * from t1;
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140 |
update t2 set b=1;
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141 |
create table t3 (a int, oref int);
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142 |
insert into t3 values (1, 1), (NULL,1), (NULL,0);
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143 |
select a, oref,
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144 |
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
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145 |
from t3;
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146 |
a oref Z
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147 |
1 1 1
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148 |
NULL 1 NULL
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149 |
NULL 0 0
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150 |
explain extended
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151 |
select a, oref,
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152 |
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
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153 |
from t3;
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154 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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155 |
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
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201
by Brian Aker
Convert default engine to Innodb |
156 |
2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 2 100.00 Using where; Full scan on NULL key
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1
by brian
clean slate |
157 |
2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where
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158 |
Warnings:
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159 |
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
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160 |
Note 1003 select "test"."t3"."a" AS "a","test"."t3"."oref" AS "oref",<in_optimizer>("test"."t3"."a",<exists>(select 1 AS "Not_used" from "test"."t1" join "test"."t2" where (("test"."t2"."a" = "test"."t1"."b") and ("test"."t2"."b" = "test"."t3"."oref") and trigcond(((<cache>("test"."t3"."a") = "test"."t1"."a") or isnull("test"."t1"."a")))) having trigcond(<is_not_null_test>("test"."t1"."a")))) AS "Z" from "test"."t3"
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161 |
drop table t1, t2, t3;
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162 |
create table t1 (a int NOT NULL, b int NOT NULL, key(a));
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163 |
insert into t1 values
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164 |
(0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
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165 |
create table t2 like t1;
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166 |
insert into t2 select * from t1;
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167 |
update t2 set b=1;
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168 |
create table t3 (a int, oref int);
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169 |
insert into t3 values (1, 1), (NULL,1), (NULL,0);
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170 |
select a, oref,
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171 |
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
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172 |
from t3;
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173 |
a oref Z
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174 |
1 1 1
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175 |
NULL 1 NULL
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176 |
NULL 0 0
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177 |
This must show a trig_cond:
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178 |
explain extended
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179 |
select a, oref,
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180 |
t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
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181 |
from t3;
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182 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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183 |
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
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201
by Brian Aker
Convert default engine to Innodb |
184 |
2 DEPENDENT SUBQUERY t1 ref a a 4 func 1 100.00 Using where; Full scan on NULL key
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1
by brian
clean slate |
185 |
2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where
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186 |
Warnings:
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187 |
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
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188 |
Note 1003 select "test"."t3"."a" AS "a","test"."t3"."oref" AS "oref",<in_optimizer>("test"."t3"."a",<exists>(select 1 AS "Not_used" from "test"."t1" join "test"."t2" where (("test"."t2"."a" = "test"."t1"."b") and ("test"."t2"."b" = "test"."t3"."oref") and trigcond((<cache>("test"."t3"."a") = "test"."t1"."a"))))) AS "Z" from "test"."t3"
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189 |
drop table t1,t2,t3;
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190 |
create table t1 (oref int, grp int);
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191 |
insert into t1 (oref, grp) values
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192 |
(1, 1),
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193 |
(1, 1);
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194 |
create table t2 (oref int, a int);
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195 |
insert into t2 values
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196 |
(1, NULL),
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197 |
(2, NULL);
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198 |
select a, oref,
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199 |
a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2;
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200 |
a oref Z
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201 |
NULL 1 NULL
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202 |
NULL 2 0
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203 |
This must show a trig_cond:
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204 |
explain extended
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205 |
select a, oref,
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206 |
a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2;
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207 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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208 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
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209 |
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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210 |
Warnings:
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211 |
Note 1276 Field or reference 't2.oref' of SELECT #2 was resolved in SELECT #1
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212 |
Note 1003 select "test"."t2"."a" AS "a","test"."t2"."oref" AS "oref",<in_optimizer>("test"."t2"."a",<exists>(select count(0) AS "count(*)" from "test"."t1" group by "test"."t1"."grp" having (("test"."t1"."grp" = "test"."t2"."oref") and trigcond((<cache>("test"."t2"."a") = <ref_null_helper>(count(0))))))) AS "Z" from "test"."t2"
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213 |
drop table t1, t2;
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214 |
create table t1 (a int, b int, primary key (a));
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215 |
insert into t1 values (1,1), (3,1),(100,1);
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216 |
create table t2 (a int, b int);
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217 |
insert into t2 values (1,1),(2,1),(NULL,1),(NULL,0);
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218 |
select a,b, a in (select a from t1 where t1.b = t2.b union select a from
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219 |
t1 where t1.b = t2.b) Z from t2 ;
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220 |
a b Z
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221 |
1 1 1
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222 |
2 1 0
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223 |
NULL 1 NULL
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224 |
NULL 0 0
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225 |
select a,b, a in (select a from t1 where t1.b = t2.b) Z from t2 ;
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226 |
a b Z
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227 |
1 1 1
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228 |
2 1 0
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229 |
NULL 1 NULL
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230 |
NULL 0 0
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231 |
drop table t1, t2;
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232 |
create table t3 (a int);
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233 |
insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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234 |
create table t2 (a int, b int, oref int);
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235 |
insert into t2 values (NULL,1, 100), (NULL,2, 100);
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236 |
create table t1 (a int, b int, c int, key(a,b));
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237 |
insert into t1 select 2*A, 2*A, 100 from t3;
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238 |
explain extended select a,b, oref, (a,b) in (select a,b from t1 where c=t2.oref) Z from t2;
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239 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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240 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
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241 |
2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 2 100.00 Using where; Full scan on NULL key
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242 |
Warnings:
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243 |
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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244 |
Note 1003 select "test"."t2"."a" AS "a","test"."t2"."b" AS "b","test"."t2"."oref" AS "oref",<in_optimizer>(("test"."t2"."a","test"."t2"."b"),<exists>(<index_lookup>(<cache>("test"."t2"."a") in t1 on a checking NULL where (("test"."t1"."c" = "test"."t2"."oref") and trigcond(((<cache>("test"."t2"."a") = "test"."t1"."a") or isnull("test"."t1"."a"))) and trigcond(((<cache>("test"."t2"."b") = "test"."t1"."b") or isnull("test"."t1"."b")))) having (trigcond(<is_not_null_test>("test"."t1"."a")) and trigcond(<is_not_null_test>("test"."t1"."b")))))) AS "Z" from "test"."t2"
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245 |
select a,b, oref, (a,b) in (select a,b from t1 where c=t2.oref) Z from t2;
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246 |
a b oref Z
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247 |
NULL 1 100 0
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248 |
NULL 2 100 NULL
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249 |
create table t4 (x int);
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250 |
insert into t4 select A.a + 10*B.a from t1 A, t1 B;
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251 |
explain extended
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252 |
select a,b, oref,
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253 |
(a,b) in (select a,b from t1,t4 where c=t2.oref) Z
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254 |
from t2;
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255 |
id select_type table type possible_keys key key_len ref rows filtered Extra
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256 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
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201
by Brian Aker
Convert default engine to Innodb |
257 |
2 DEPENDENT SUBQUERY t1 ALL a NULL NULL NULL 10 80.00 Using where
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1
by brian
clean slate |
258 |
2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer
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259 |
Warnings:
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|
260 |
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
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261 |
Note 1003 select "test"."t2"."a" AS "a","test"."t2"."b" AS "b","test"."t2"."oref" AS "oref",<in_optimizer>(("test"."t2"."a","test"."t2"."b"),<exists>(select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" join "test"."t4" where (("test"."t1"."c" = "test"."t2"."oref") and trigcond(((<cache>("test"."t2"."a") = "test"."t1"."a") or isnull("test"."t1"."a"))) and trigcond(((<cache>("test"."t2"."b") = "test"."t1"."b") or isnull("test"."t1"."b")))) having (trigcond(<is_not_null_test>("test"."t1"."a")) and trigcond(<is_not_null_test>("test"."t1"."b"))))) AS "Z" from "test"."t2"
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262 |
select a,b, oref,
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263 |
(a,b) in (select a,b from t1,t4 where c=t2.oref) Z
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264 |
from t2;
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265 |
a b oref Z
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266 |
NULL 1 100 0
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267 |
NULL 2 100 NULL
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268 |
drop table t1,t2,t3,t4;
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269 |
create table t1 (oref char(4), grp int, ie1 int, ie2 int);
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|
270 |
insert into t1 (oref, grp, ie1, ie2) values
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271 |
('aa', 10, 2, 1),
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272 |
('aa', 10, 1, 1),
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273 |
('aa', 20, 2, 1),
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274 |
('bb', 10, 3, 1),
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275 |
('cc', 10, 4, 2),
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276 |
('cc', 20, 3, 2),
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277 |
('ee', 10, 2, 1),
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278 |
('ee', 10, 1, 2),
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279 |
('ff', 20, 2, 2),
|
|
280 |
('ff', 20, 1, 2);
|
|
281 |
create table t2 (oref char(4), a int, b int);
|
|
282 |
insert into t2 values
|
|
283 |
('ee', NULL, 1),
|
|
284 |
('bb', 2, 1),
|
|
285 |
('ff', 2, 2),
|
|
286 |
('cc', 3, NULL),
|
|
287 |
('bb', NULL, NULL),
|
|
288 |
('aa', 1, 1),
|
|
289 |
('dd', 1, NULL);
|
|
290 |
alter table t1 add index idx(ie1,ie2);
|
|
291 |
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=3 and b is null ;
|
|
292 |
oref a b Z
|
|
293 |
cc 3 NULL NULL
|
|
294 |
insert into t2 values ('new1', 10,10);
|
|
295 |
insert into t1 values ('new1', 1234, 10, NULL);
|
|
296 |
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=10 and b=10;
|
|
297 |
oref a b Z
|
|
298 |
new1 10 10 NULL
|
|
299 |
explain extended
|
|
300 |
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2 where a=10 and b=10;
|
|
301 |
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
302 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 8 100.00 Using where
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
303 |
2 DEPENDENT SUBQUERY t1 ALL idx NULL NULL NULL 11 81.82 Using where
|
|
1
by brian
clean slate |
304 |
Warnings:
|
305 |
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
306 |
Note 1003 select "test"."t2"."oref" AS "oref","test"."t2"."a" AS "a","test"."t2"."b" AS "b",<in_optimizer>(("test"."t2"."a","test"."t2"."b"),<exists>(select "test"."t1"."ie1" AS "ie1","test"."t1"."ie2" AS "ie2" from "test"."t1" where (("test"."t1"."oref" = "test"."t2"."oref") and trigcond(((<cache>("test"."t2"."a") = "test"."t1"."ie1") or isnull("test"."t1"."ie1"))) and trigcond(((<cache>("test"."t2"."b") = "test"."t1"."ie2") or isnull("test"."t1"."ie2")))) having (trigcond(<is_not_null_test>("test"."t1"."ie1")) and trigcond(<is_not_null_test>("test"."t1"."ie2"))))) AS "Z" from "test"."t2" where (("test"."t2"."b" = 10) and ("test"."t2"."a" = 10))
|
|
1
by brian
clean slate |
307 |
drop table t1, t2;
|
308 |
create table t1 (oref char(4), grp int, ie int);
|
|
309 |
insert into t1 (oref, grp, ie) values
|
|
310 |
('aa', 10, 2),
|
|
311 |
('aa', 10, 1),
|
|
312 |
('aa', 20, NULL),
|
|
313 |
('bb', 10, 3),
|
|
314 |
('cc', 10, 4),
|
|
315 |
('cc', 20, NULL),
|
|
316 |
('ee', 10, NULL),
|
|
317 |
('ee', 10, NULL),
|
|
318 |
('ff', 20, 2),
|
|
319 |
('ff', 20, 1);
|
|
320 |
create table t2 (oref char(4), a int);
|
|
321 |
insert into t2 values
|
|
322 |
('ee', NULL),
|
|
323 |
('bb', 2),
|
|
324 |
('ff', 2),
|
|
325 |
('cc', 3),
|
|
326 |
('aa', 1),
|
|
327 |
('dd', NULL),
|
|
328 |
('bb', NULL);
|
|
329 |
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
330 |
oref a Z
|
|
331 |
ee NULL NULL
|
|
332 |
bb 2 0
|
|
333 |
ff 2 1
|
|
334 |
cc 3 NULL
|
|
335 |
aa 1 1
|
|
336 |
dd NULL 0
|
|
337 |
bb NULL NULL
|
|
338 |
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
|
|
339 |
oref a
|
|
340 |
aa 1
|
|
341 |
ff 2
|
|
342 |
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
|
|
343 |
oref a
|
|
344 |
bb 2
|
|
345 |
dd NULL
|
|
346 |
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
|
|
347 |
oref a Z
|
|
348 |
ee NULL NULL
|
|
349 |
bb 2 0
|
|
350 |
ff 2 0
|
|
351 |
cc 3 NULL
|
|
352 |
aa 1 1
|
|
353 |
dd NULL 0
|
|
354 |
bb NULL NULL
|
|
355 |
select oref, a from t2 where
|
|
356 |
a in (select min(ie) from t1 where oref=t2.oref group by grp);
|
|
357 |
oref a
|
|
358 |
aa 1
|
|
359 |
select oref, a from t2 where
|
|
360 |
a not in (select min(ie) from t1 where oref=t2.oref group by grp);
|
|
361 |
oref a
|
|
362 |
bb 2
|
|
363 |
ff 2
|
|
364 |
dd NULL
|
|
365 |
update t1 set ie=3 where oref='ff' and ie=1;
|
|
366 |
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by
|
|
367 |
grp) Z from t2;
|
|
368 |
oref a Z
|
|
369 |
ee NULL NULL
|
|
370 |
bb 2 0
|
|
371 |
ff 2 1
|
|
372 |
cc 3 NULL
|
|
373 |
aa 1 1
|
|
374 |
dd NULL 0
|
|
375 |
bb NULL NULL
|
|
376 |
select oref, a from t2 where a in (select min(ie) from t1 where
|
|
377 |
oref=t2.oref group by grp);
|
|
378 |
oref a
|
|
379 |
ff 2
|
|
380 |
aa 1
|
|
381 |
select oref, a from t2 where a not in (select min(ie) from t1 where
|
|
382 |
oref=t2.oref group by grp);
|
|
383 |
oref a
|
|
384 |
bb 2
|
|
385 |
dd NULL
|
|
386 |
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by
|
|
387 |
grp having min(ie) > 1) Z from t2;
|
|
388 |
oref a Z
|
|
389 |
ee NULL 0
|
|
390 |
bb 2 0
|
|
391 |
ff 2 1
|
|
392 |
cc 3 0
|
|
393 |
aa 1 0
|
|
394 |
dd NULL 0
|
|
395 |
bb NULL NULL
|
|
396 |
select oref, a from t2 where a in (select min(ie) from t1 where
|
|
397 |
oref=t2.oref group by grp having min(ie) > 1);
|
|
398 |
oref a
|
|
399 |
ff 2
|
|
400 |
select oref, a from t2 where a not in (select min(ie) from t1 where
|
|
401 |
oref=t2.oref group by grp having min(ie) > 1);
|
|
402 |
oref a
|
|
403 |
ee NULL
|
|
404 |
bb 2
|
|
405 |
cc 3
|
|
406 |
aa 1
|
|
407 |
dd NULL
|
|
408 |
alter table t1 add index idx(ie);
|
|
409 |
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
410 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
411 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
412 |
2 DEPENDENT SUBQUERY t1 ALL idx NULL NULL NULL 10 Using where
|
|
1
by brian
clean slate |
413 |
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
414 |
oref a Z
|
|
415 |
ee NULL NULL
|
|
416 |
bb 2 0
|
|
417 |
ff 2 1
|
|
418 |
cc 3 NULL
|
|
419 |
aa 1 1
|
|
420 |
dd NULL 0
|
|
421 |
bb NULL NULL
|
|
422 |
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
|
|
423 |
oref a
|
|
424 |
aa 1
|
|
425 |
ff 2
|
|
426 |
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
|
|
427 |
oref a
|
|
428 |
bb 2
|
|
429 |
dd NULL
|
|
430 |
alter table t1 drop index idx;
|
|
431 |
alter table t1 add index idx(oref,ie);
|
|
432 |
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
433 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
434 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
435 |
2 DEPENDENT SUBQUERY t1 ref_or_null idx idx 10 test.t2.oref,func 10 Using where; Using index; Full scan on NULL key
|
|
1
by brian
clean slate |
436 |
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
437 |
oref a Z
|
|
438 |
ee NULL NULL
|
|
439 |
bb 2 0
|
|
440 |
ff 2 1
|
|
441 |
cc 3 NULL
|
|
442 |
aa 1 1
|
|
443 |
dd NULL 0
|
|
444 |
bb NULL NULL
|
|
445 |
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
|
|
446 |
oref a
|
|
447 |
ff 2
|
|
448 |
aa 1
|
|
449 |
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
|
|
450 |
oref a
|
|
451 |
bb 2
|
|
452 |
dd NULL
|
|
453 |
explain
|
|
454 |
select oref, a,
|
|
455 |
a in (select min(ie) from t1 where oref=t2.oref
|
|
456 |
group by grp having min(ie) > 1) Z
|
|
457 |
from t2;
|
|
458 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
459 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
460 |
2 DEPENDENT SUBQUERY t1 ref idx idx 5 test.t2.oref 5 Using where; Using temporary; Using filesort
|
|
1
by brian
clean slate |
461 |
select oref, a,
|
462 |
a in (select min(ie) from t1 where oref=t2.oref
|
|
463 |
group by grp having min(ie) > 1) Z
|
|
464 |
from t2;
|
|
465 |
oref a Z
|
|
466 |
ee NULL 0
|
|
467 |
bb 2 0
|
|
468 |
ff 2 1
|
|
469 |
cc 3 0
|
|
470 |
aa 1 0
|
|
471 |
dd NULL 0
|
|
472 |
bb NULL NULL
|
|
473 |
select oref, a from t2 where a in (select min(ie) from t1 where oref=t2.oref
|
|
474 |
group by grp having min(ie) > 1);
|
|
475 |
oref a
|
|
476 |
ff 2
|
|
477 |
select oref, a from t2 where a not in (select min(ie) from t1 where oref=t2.oref
|
|
478 |
group by grp having min(ie) > 1);
|
|
479 |
oref a
|
|
480 |
ee NULL
|
|
481 |
bb 2
|
|
482 |
cc 3
|
|
483 |
aa 1
|
|
484 |
dd NULL
|
|
485 |
drop table t1,t2;
|
|
486 |
create table t1 (oref char(4), grp int, ie1 int, ie2 int);
|
|
487 |
insert into t1 (oref, grp, ie1, ie2) values
|
|
488 |
('aa', 10, 2, 1),
|
|
489 |
('aa', 10, 1, 1),
|
|
490 |
('aa', 20, 2, 1),
|
|
491 |
('bb', 10, 3, 1),
|
|
492 |
('cc', 10, 4, 2),
|
|
493 |
('cc', 20, 3, 2),
|
|
494 |
('ee', 10, 2, 1),
|
|
495 |
('ee', 10, 1, 2),
|
|
496 |
('ff', 20, 2, 2),
|
|
497 |
('ff', 20, 1, 2);
|
|
498 |
create table t2 (oref char(4), a int, b int);
|
|
499 |
insert into t2 values
|
|
500 |
('ee', NULL, 1),
|
|
501 |
('bb', 2, 1),
|
|
502 |
('ff', 2, 2),
|
|
503 |
('cc', 3, NULL),
|
|
504 |
('bb', NULL, NULL),
|
|
505 |
('aa', 1, 1),
|
|
506 |
('dd', 1, NULL);
|
|
507 |
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
|
|
508 |
oref a b Z
|
|
509 |
ee NULL 1 NULL
|
|
510 |
bb 2 1 0
|
|
511 |
ff 2 2 1
|
|
512 |
cc 3 NULL NULL
|
|
513 |
bb NULL NULL NULL
|
|
514 |
aa 1 1 1
|
|
515 |
dd 1 NULL 0
|
|
516 |
select oref, a, b from t2 where (a,b) in (select ie1,ie2 from t1 where oref=t2.oref);
|
|
517 |
oref a b
|
|
518 |
aa 1 1
|
|
519 |
ff 2 2
|
|
520 |
select oref, a, b from t2 where (a,b) not in (select ie1,ie2 from t1 where oref=t2.oref);
|
|
521 |
oref a b
|
|
522 |
bb 2 1
|
|
523 |
dd 1 NULL
|
|
524 |
select oref, a, b,
|
|
525 |
(a,b) in (select min(ie1),max(ie2) from t1
|
|
526 |
where oref=t2.oref group by grp) Z
|
|
527 |
from t2;
|
|
528 |
oref a b Z
|
|
529 |
ee NULL 1 0
|
|
530 |
bb 2 1 0
|
|
531 |
ff 2 2 0
|
|
532 |
cc 3 NULL NULL
|
|
533 |
bb NULL NULL NULL
|
|
534 |
aa 1 1 1
|
|
535 |
dd 1 NULL 0
|
|
536 |
select oref, a, b from t2 where
|
|
537 |
(a,b) in (select min(ie1), max(ie2) from t1 where oref=t2.oref group by grp);
|
|
538 |
oref a b
|
|
539 |
aa 1 1
|
|
540 |
select oref, a, b from t2 where
|
|
541 |
(a,b) not in (select min(ie1), max(ie2) from t1 where oref=t2.oref group by grp);
|
|
542 |
oref a b
|
|
543 |
ee NULL 1
|
|
544 |
bb 2 1
|
|
545 |
ff 2 2
|
|
546 |
dd 1 NULL
|
|
547 |
alter table t1 add index idx(ie1,ie2);
|
|
548 |
explain select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
|
|
549 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
550 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
551 |
2 DEPENDENT SUBQUERY t1 ALL idx NULL NULL NULL 10 Using where
|
|
1
by brian
clean slate |
552 |
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
|
553 |
oref a b Z
|
|
554 |
ee NULL 1 NULL
|
|
555 |
bb 2 1 0
|
|
556 |
ff 2 2 1
|
|
557 |
cc 3 NULL NULL
|
|
558 |
bb NULL NULL NULL
|
|
559 |
aa 1 1 1
|
|
560 |
dd 1 NULL 0
|
|
561 |
select oref, a, b from t2 where (a,b) in (select ie1,ie2 from t1 where oref=t2.oref);
|
|
562 |
oref a b
|
|
563 |
aa 1 1
|
|
564 |
ff 2 2
|
|
565 |
select oref, a, b from t2 where (a,b) not in (select ie1,ie2 from t1 where oref=t2.oref);
|
|
566 |
oref a b
|
|
567 |
bb 2 1
|
|
568 |
dd 1 NULL
|
|
569 |
explain extended
|
|
570 |
select oref, a, b, (a,b) in (select ie1,ie2 from t1 where oref=t2.oref) Z from t2;
|
|
571 |
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
572 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 7 100.00
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
573 |
2 DEPENDENT SUBQUERY t1 ALL idx NULL NULL NULL 10 80.00 Using where
|
|
1
by brian
clean slate |
574 |
Warnings:
|
575 |
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
576 |
Note 1003 select "test"."t2"."oref" AS "oref","test"."t2"."a" AS "a","test"."t2"."b" AS "b",<in_optimizer>(("test"."t2"."a","test"."t2"."b"),<exists>(select "test"."t1"."ie1" AS "ie1","test"."t1"."ie2" AS "ie2" from "test"."t1" where (("test"."t1"."oref" = "test"."t2"."oref") and trigcond(((<cache>("test"."t2"."a") = "test"."t1"."ie1") or isnull("test"."t1"."ie1"))) and trigcond(((<cache>("test"."t2"."b") = "test"."t1"."ie2") or isnull("test"."t1"."ie2")))) having (trigcond(<is_not_null_test>("test"."t1"."ie1")) and trigcond(<is_not_null_test>("test"."t1"."ie2"))))) AS "Z" from "test"."t2"
|
|
1
by brian
clean slate |
577 |
drop table t1,t2;
|
578 |
create table t1 (oref char(4), grp int, ie int primary key);
|
|
579 |
insert into t1 (oref, grp, ie) values
|
|
580 |
('aa', 10, 2),
|
|
581 |
('aa', 10, 1),
|
|
582 |
('bb', 10, 3),
|
|
583 |
('cc', 10, 4),
|
|
584 |
('cc', 20, 5),
|
|
585 |
('cc', 10, 6);
|
|
586 |
create table t2 (oref char(4), a int);
|
|
587 |
insert into t2 values
|
|
588 |
('ee', NULL),
|
|
589 |
('bb', 2),
|
|
590 |
('cc', 5),
|
|
591 |
('cc', 2),
|
|
592 |
('cc', NULL),
|
|
593 |
('aa', 1),
|
|
594 |
('bb', NULL);
|
|
595 |
explain select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
596 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
597 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
598 |
2 DEPENDENT SUBQUERY t1 unique_subquery PRIMARY PRIMARY 4 func 1 Using where; Full scan on NULL key
|
|
599 |
select oref, a, a in (select ie from t1 where oref=t2.oref) Z from t2;
|
|
600 |
oref a Z
|
|
601 |
ee NULL 0
|
|
602 |
bb 2 0
|
|
603 |
cc 5 1
|
|
604 |
cc 2 0
|
|
605 |
cc NULL NULL
|
|
606 |
aa 1 1
|
|
607 |
bb NULL NULL
|
|
608 |
select oref, a from t2 where a in (select ie from t1 where oref=t2.oref);
|
|
609 |
oref a
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
610 |
aa 1
|
|
1
by brian
clean slate |
611 |
cc 5
|
612 |
select oref, a from t2 where a not in (select ie from t1 where oref=t2.oref);
|
|
613 |
oref a
|
|
614 |
ee NULL
|
|
615 |
bb 2
|
|
616 |
cc 2
|
|
617 |
explain
|
|
618 |
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
|
|
619 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
620 |
1 PRIMARY t2 ALL NULL NULL NULL NULL 7
|
|
621 |
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 Using where; Using temporary; Using filesort
|
|
622 |
select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2;
|
|
623 |
oref a Z
|
|
624 |
ee NULL 0
|
|
625 |
bb 2 0
|
|
626 |
cc 5 1
|
|
627 |
cc 2 0
|
|
628 |
cc NULL NULL
|
|
629 |
aa 1 1
|
|
630 |
bb NULL NULL
|
|
631 |
drop table t1,t2;
|
|
632 |
create table t1 (a int, b int);
|
|
633 |
insert into t1 values (0,0), (2,2), (3,3);
|
|
634 |
create table t2 (a int, b int);
|
|
635 |
insert into t2 values (1,1), (3,3);
|
|
636 |
select a, b, (a,b) in (select a, min(b) from t2 group by a) Z from t1;
|
|
637 |
a b Z
|
|
638 |
0 0 0
|
|
639 |
2 2 0
|
|
640 |
3 3 1
|
|
641 |
insert into t2 values (NULL,4);
|
|
642 |
select a, b, (a,b) in (select a, min(b) from t2 group by a) Z from t1;
|
|
643 |
a b Z
|
|
644 |
0 0 0
|
|
645 |
2 2 0
|
|
646 |
3 3 1
|
|
647 |
drop table t1,t2;
|
|
648 |
CREATE TABLE t1 (a int, b INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
|
|
649 |
INSERT INTO t1 VALUES (1,1,'a'), (1,2,'b'), (1,3,'c'), (1,4,'d'), (1,5,'e'),
|
|
650 |
(2,1,'f'), (2,2,'g'), (2,3,'h'), (3,4,'i'),(3,3,'j'), (3,2,'k'), (3,1,'l'),
|
|
651 |
(1,9,'m');
|
|
652 |
CREATE TABLE t2 (a int, b INT, c CHAR(10) NOT NULL, PRIMARY KEY (a, b));
|
|
653 |
INSERT INTO t2 SELECT * FROM t1;
|
|
654 |
SELECT a, MAX(b), (SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b))
|
|
655 |
as test FROM t1 GROUP BY a;
|
|
656 |
a MAX(b) test
|
|
657 |
1 9 m
|
|
658 |
2 3 h
|
|
659 |
3 4 i
|
|
660 |
SELECT * FROM t1 GROUP by t1.a
|
|
661 |
HAVING (MAX(t1.b) > (SELECT MAX(t2.b) FROM t2 WHERE t2.c < t1.c
|
|
662 |
HAVING MAX(t2.b+t1.a) < 10));
|
|
663 |
a b c
|
|
664 |
SELECT a,b,c FROM t1 WHERE b in (9,3,4) ORDER BY b,c;
|
|
665 |
a b c
|
|
666 |
1 3 c
|
|
667 |
2 3 h
|
|
668 |
3 3 j
|
|
669 |
1 4 d
|
|
670 |
3 4 i
|
|
671 |
1 9 m
|
|
672 |
SELECT a, MAX(b),
|
|
673 |
(SELECT COUNT(DISTINCT t.c) FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b)
|
|
674 |
LIMIT 1)
|
|
675 |
as cnt,
|
|
676 |
(SELECT t.b FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1)
|
|
677 |
as t_b,
|
|
678 |
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1)
|
|
679 |
as t_b,
|
|
680 |
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) ORDER BY t.c LIMIT 1)
|
|
681 |
as t_b
|
|
682 |
FROM t1 GROUP BY a;
|
|
683 |
a MAX(b) cnt t_b t_b t_b
|
|
684 |
1 9 1 9 m m
|
|
685 |
2 3 1 3 h h
|
|
686 |
3 4 1 4 i i
|
|
687 |
SELECT a, MAX(b),
|
|
688 |
(SELECT t.c FROM t1 AS t WHERE t1.a=t.a AND t.b=MAX(t1.b) LIMIT 1) as test
|
|
689 |
FROM t1 GROUP BY a;
|
|
690 |
a MAX(b) test
|
|
691 |
1 9 m
|
|
692 |
2 3 h
|
|
693 |
3 4 i
|
|
694 |
DROP TABLE t1, t2;
|
|
695 |
CREATE TABLE t1 (a int);
|
|
696 |
CREATE TABLE t2 (b int, PRIMARY KEY(b));
|
|
697 |
INSERT INTO t1 VALUES (1), (NULL), (4);
|
|
698 |
INSERT INTO t2 VALUES (3), (1),(2), (5), (4), (7), (6);
|
|
699 |
EXPLAIN EXTENDED
|
|
700 |
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1));
|
|
701 |
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
702 |
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
703 |
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index
|
|
704 |
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
705 |
Warnings:
|
|
706 |
Note 1003 select "test"."t1"."a" AS "a" from "test"."t1" join "test"."t2" where (("test"."t2"."b" = "test"."t1"."a") and (not(<in_optimizer>("test"."t1"."a",<exists>(select 1 AS "Not_used" from "test"."t1" where ((<cache>("test"."t2"."b") = "test"."t1"."a") or isnull("test"."t1"."a")) having <is_not_null_test>("test"."t1"."a"))))))
|
|
707 |
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1));
|
|
708 |
a
|
|
709 |
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1 WHERE a > 4));
|
|
710 |
a
|
|
711 |
1
|
|
712 |
4
|
|
713 |
DROP TABLE t1,t2;
|
|
714 |
CREATE TABLE t1 (id int);
|
|
715 |
CREATE TABLE t2 (id int PRIMARY KEY);
|
|
716 |
CREATE TABLE t3 (id int PRIMARY KEY, name varchar(10));
|
|
717 |
INSERT INTO t1 VALUES (2), (NULL), (3), (1);
|
|
718 |
INSERT INTO t2 VALUES (234), (345), (457);
|
|
719 |
INSERT INTO t3 VALUES (222,'bbb'), (333,'ccc'), (111,'aaa');
|
|
720 |
EXPLAIN
|
|
721 |
SELECT * FROM t1
|
|
722 |
WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3
|
|
723 |
WHERE t3.name='xxx' AND t2.id=t3.id);
|
|
724 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
725 |
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
|
726 |
2 DEPENDENT SUBQUERY t2 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Using index; Full scan on NULL key
|
|
|
201
by Brian Aker
Convert default engine to Innodb |
727 |
2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Full scan on NULL key
|
|
1
by brian
clean slate |
728 |
SELECT * FROM t1
|
729 |
WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3
|
|
730 |
WHERE t3.name='xxx' AND t2.id=t3.id);
|
|
731 |
id
|
|
732 |
2
|
|
733 |
NULL
|
|
734 |
3
|
|
735 |
1
|
|
736 |
SELECT (t1.id IN (SELECT t2.id FROM t2,t3
|
|
737 |
WHERE t3.name='xxx' AND t2.id=t3.id)) AS x
|
|
738 |
FROM t1;
|
|
739 |
x
|
|
740 |
0
|
|
741 |
0
|
|
742 |
0
|
|
743 |
0
|
|
744 |
DROP TABLE t1,t2,t3;
|
|
745 |
CREATE TABLE t1 (a INT NOT NULL);
|
|
746 |
INSERT INTO t1 VALUES (1),(-1), (65),(66);
|
|
747 |
CREATE TABLE t2 (a INT UNSIGNED NOT NULL PRIMARY KEY);
|
|
748 |
INSERT INTO t2 VALUES (65),(66);
|
|
749 |
SELECT a FROM t1 WHERE a NOT IN (65,66);
|
|
750 |
a
|
|
751 |
1
|
|
752 |
-1
|
|
753 |
SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2);
|
|
754 |
a
|
|
755 |
1
|
|
756 |
-1
|
|
757 |
EXPLAIN SELECT a FROM t1 WHERE a NOT IN (SELECT a FROM t2);
|
|
758 |
id select_type table type possible_keys key key_len ref rows Extra
|
|
759 |
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
|
760 |
2 DEPENDENT SUBQUERY t2 unique_subquery PRIMARY PRIMARY 4 func 1 Using index; Using where
|
|
761 |
DROP TABLE t1, t2;
|
|
762 |
CREATE TABLE t1 (a INT);
|
|
763 |
INSERT INTO t1 VALUES(1);
|
|
764 |
CREATE TABLE t2 (placeholder CHAR(11));
|
|
765 |
INSERT INTO t2 VALUES("placeholder");
|
|
766 |
SELECT ROW(1, 2) IN (SELECT t1.a, 2) FROM t1 GROUP BY t1.a;
|
|
767 |
ROW(1, 2) IN (SELECT t1.a, 2)
|
|
768 |
1
|
|
769 |
SELECT ROW(1, 2) IN (SELECT t1.a, 2 FROM t2) FROM t1 GROUP BY t1.a;
|
|
770 |
ROW(1, 2) IN (SELECT t1.a, 2 FROM t2)
|
|
771 |
1
|
|
772 |
DROP TABLE t1, t2;
|
|
773 |
create table t1 (a int, b decimal(13, 3));
|
|
774 |
insert into t1 values (1, 0.123);
|
|
775 |
select a, (select max(b) from t1) into outfile "subselect.out.file.1" from t1;
|
|
776 |
delete from t1;
|
|
777 |
load data infile "subselect.out.file.1" into table t1;
|
|
778 |
select * from t1;
|
|
779 |
a b
|
|
780 |
1 0.123
|
|
781 |
drop table t1;
|
|
782 |
End of 5.0 tests
|