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1
by brian
clean slate |
1 |
drop table if exists t1;
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2 |
create table t1 (a int not null default 0 primary key, b int not null default 0);
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3 |
insert into t1 () values ();
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4 |
insert into t1 values (1,1),(2,1),(3,1);
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5 |
update t1 set a=4 where b=1 limit 1;
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6 |
select * from t1;
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7 |
a b
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8 |
0 0
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9 |
4 1
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10 |
2 1
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11 |
3 1
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12 |
update t1 set b=2 where b=1 limit 2;
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13 |
select * from t1;
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14 |
a b
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15 |
0 0
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16 |
4 2
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17 |
2 2
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18 |
3 1
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19 |
update t1 set b=4 where b=1;
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20 |
select * from t1;
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21 |
a b
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22 |
0 0
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23 |
4 2
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24 |
2 2
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25 |
3 4
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26 |
delete from t1 where b=2 limit 1;
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27 |
select * from t1;
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28 |
a b
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29 |
0 0
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30 |
2 2
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31 |
3 4
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32 |
delete from t1 limit 1;
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33 |
select * from t1;
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34 |
a b
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35 |
2 2
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36 |
3 4
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37 |
drop table t1;
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38 |
create table t1 (i int);
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39 |
insert into t1 (i) values(1),(1),(1);
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40 |
delete from t1 limit 1;
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41 |
update t1 set i=2 limit 1;
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42 |
delete from t1 limit 0;
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43 |
update t1 set i=3 limit 0;
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44 |
select * from t1;
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45 |
i
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46 |
2
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47 |
1
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48 |
drop table t1;
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49 |
select 0 limit 0;
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50 |
0
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51 |
CREATE TABLE t1(id int auto_increment primary key, id2 int, index(id2));
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52 |
INSERT INTO t1 (id2) values (0),(0),(0);
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53 |
DELETE FROM t1 WHERE id=1;
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54 |
INSERT INTO t1 SET id2=0;
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55 |
SELECT * FROM t1;
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56 |
id id2
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57 |
4 0
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58 |
2 0
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59 |
3 0
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60 |
DELETE FROM t1 WHERE id2 = 0 ORDER BY id LIMIT 1;
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61 |
SELECT * FROM t1;
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62 |
id id2
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63 |
4 0
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64 |
3 0
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65 |
DELETE FROM t1 WHERE id2 = 0 ORDER BY id desc LIMIT 1;
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66 |
SELECT * FROM t1;
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67 |
id id2
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68 |
3 0
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69 |
DROP TABLE t1;
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70 |
create table t1 (a integer);
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71 |
insert into t1 values (1);
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72 |
select 1 as a from t1 union all select 1 from dual limit 1;
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73 |
a
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74 |
1
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75 |
(select 1 as a from t1) union all (select 1 from dual) limit 1;
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76 |
a
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77 |
1
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78 |
drop table t1;
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79 |
create table t1 (a int);
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80 |
insert into t1 values (1),(2),(3),(4),(5),(6),(7);
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81 |
explain select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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82 |
id select_type table type possible_keys key key_len ref rows Extra
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83 |
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where; Using temporary
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84 |
select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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85 |
c
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86 |
7
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87 |
explain select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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88 |
id select_type table type possible_keys key key_len ref rows Extra
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89 |
1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where; Using temporary
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90 |
select sum(a) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;
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91 |
c
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92 |
28
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93 |
drop table t1;
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94 |
prepare s from "select 1 limit ?";
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95 |
set @a='qwe';
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96 |
execute s using @a;
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97 |
1
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98 |
set @a=-1;
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99 |
execute s using @a;
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100 |
ERROR HY000: Incorrect arguments to EXECUTE
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101 |
prepare s from "select 1 limit 1, ?";
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102 |
execute s using @a;
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103 |
ERROR HY000: Incorrect arguments to EXECUTE
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104 |
prepare s from "select 1 limit ?, ?";
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105 |
execute s using @a, @a;
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106 |
ERROR HY000: Incorrect arguments to EXECUTE
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107 |
set @a=14632475938453979136;
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108 |
execute s using @a, @a;
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109 |
1
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110 |
set @a=-14632475938453979136;
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111 |
execute s using @a, @a;
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112 |
ERROR HY000: Incorrect arguments to EXECUTE
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113 |
End of 5.0 tests
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