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7fb9d64989
Part of MDEV-5336 Implement LOCK FOR BACKUP Originally both table metadata lock and global read lock protection were acquired before getting TABLE from table cache. This will be reordered in a future commit with MDL_BACKUP_XXX locks so that we first take table metadata lock, then get TABLE from table cache, then acquire analogue of global read lock. This patch both simplifies FLUSH TABLES code, makes FLUSH TABLES to lock less and also enables FLUSH TABLES code to be used with backup locks. The usage of FLUSH TABLES changes slightly: - FLUSH TABLES without any arguments will now only close not used tables and tables locked by the FLUSH TABLES connection. All not used table shares will be closed. Tables locked by the FLUSH TABLES connection will be reopened and re-locked after all others has stoped using the table (as before). If there was no locked tables, then FLUSH TABLES is instant and will not cause any waits. FLUSH TABLES will not wait for any in use table. - FLUSH TABLES with a table list, will ensure that the tables are closed before statement returns. The code is now only using MDL locks and not table share versions, which simplices the code greatly. One visible change is that the server will wait for the end of the transaction that are using the tables. Before FLUSH TABLES only waited for the statements to end. Signed-off-by: Monty <monty@mariadb.org>
180 lines
4.9 KiB
Plaintext
180 lines
4.9 KiB
Plaintext
create table t1 (a int, b int as (a+1), c int as (b+1) stored);
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insert t1 set a=1;
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select * from t1;
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a b c
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1 2 3
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update t1 set a=2;
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select * from t1;
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a b c
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2 3 4
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drop table t1;
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create table t1 (a int, c int as(a), p varchar(20) as(y), y char(20), index (p,c));
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`a` int(11) DEFAULT NULL,
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`c` int(11) GENERATED ALWAYS AS (`a`) VIRTUAL,
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`p` varchar(20) GENERATED ALWAYS AS (`y`) VIRTUAL,
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`y` char(20) DEFAULT NULL,
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KEY `p` (`p`,`c`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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insert into t1 (a,y) values(1, "yyy");
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update t1 set a = 100 where a = 1;
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check table t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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drop table t1;
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create table t1 (
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a varchar(10000),
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b varchar(3000),
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c varchar(14000) generated always as (concat(a,b)) virtual,
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d varchar(5000) generated always as (b) virtual,
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e int(11) generated always as (10) virtual,
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h int(11) not null primary key,
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index(c(100), d(20)));
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insert t1 (a,b,h) values (repeat('g', 10000), repeat('x', 2800), 1);
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update t1 set a = repeat(cast(1 as char), 2000);
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drop table t1;
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create table t1 (
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a varchar(10000),
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b varchar(3000),
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c varchar(14000) generated always as (concat(a,b)) virtual,
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i varchar(5000) generated always as (b) virtual,
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d varchar(5000) generated always as (i) virtual,
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e int(11) generated always as (10) virtual,
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h int(11) not null primary key,
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index(c(100), d(20)));
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insert t1 (a,b,h) values (repeat('g', 10000), repeat('x', 2800), 1);
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update t1 set a = repeat(cast(1 as char), 2000);
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drop table t1;
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create table t1(a blob not null, b int, c varbinary (10) generated always as (a) virtual, unique (c(9)));
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insert t1 (a,b) values ('a', 1);
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replace t1 set a = 'a',b =1;
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insert t1 (a,b) values ('a', 1) on duplicate key update a='b', b=2;
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select * from t1;
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a b c
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b 2 b
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drop table t1;
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create table t (a int primary key, b int, c int as (b), index (c));
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insert t (a,b) values (9,0);
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create table t2 select * from t;
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update t, t2 set t.b=10 where t.a=t2.a;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c
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9 10 10
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drop table t, t2;
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create table t1 (a int, b int, c int, d int, e int);
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insert t1 values (1,2,3,4,5), (1,2,3,4,5);
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SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR
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create table t (a int primary key,
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b int, c blob as (b), index (c(57)),
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d blob, e blob as (d), index (e(57)))
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replace select * from t1;
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Warnings:
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Warning 1906 The value specified for generated column 'c' in table 't' ignored
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Warning 1906 The value specified for generated column 'e' in table 't' ignored
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Warning 1906 The value specified for generated column 'c' in table 't' ignored
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Warning 1906 The value specified for generated column 'e' in table 't' ignored
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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1 2 2 4 4
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update t set a=10, b=1, d=1;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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10 1 1 1 1
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replace t (a,b,d) values (10,2,2);
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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10 2 2 2 2
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insert t(a,b,d) values (10) on duplicate key update b=3;
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ERROR 21S01: Column count doesn't match value count at row 1
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insert t(a,b,d) values (10,2,2) on duplicate key update b=3, d=3;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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10 3 3 3 3
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replace t (a,b,d) select 10,4,4;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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10 4 4 4 4
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insert t(a,b,d) select 10,4,4 on duplicate key update b=5, d=5;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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10 5 5 5 5
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replace delayed t (a,b,d) values (10,6,6);
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flush tables t;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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10 6 6 6 6
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insert delayed t(a,b,d) values (10,6,6) on duplicate key update b=7, d=7;
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flush tables t;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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10 7 7 7 7
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load data infile 'MYSQLTEST_VARDIR/tmp/vblobs.txt' replace into table t;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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10 8 8 8 8
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update t set a=11, b=9, d=9 where a>5;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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11 9 9 9 9
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create table t2 select * from t;
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update t, t2 set t.b=10, t.d=10 where t.a=t2.a;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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11 10 10 10 10
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update t, t tt set t.b=11, tt.d=11 where t.a=tt.a;
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check table t;
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Table Op Msg_type Msg_text
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test.t check status OK
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select * from t;
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a b c d e
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11 11 11 11 11
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drop table t, t1, t2;
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create table t (f1 int, f2 int, f3 int as (f1*2) virtual, key(f3,f2));
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insert into t (f1,f2) values (1,1),(2,2);
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create view v as
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select a2.f1, a2.f2, a1.f3
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from t a1, t a2
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where a2.f3 <> 0
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with local check option;
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update v set f3 = 52;
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drop view v;
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drop table t;
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