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8b0ece5e88
- open and create derived tables - detect which tables should be locked for write - lock and fill derived tables some unitialized variables fixed mysql-test/r/lock_multi.result: correct results returned mysql-test/r/multi_update.result: correct results returned mysql-test/r/view.result: correct results returned mysql-test/t/multi_update.test: correct results returned mysql-test/t/view.test: correct results returned sql/mysql_priv.h: derived tables processing splited on table creation and table filling sql/sql_base.cc: derived tables processing splited on table creation and table filling sql/sql_class.h: function to detect when we need fill derived tables sql/sql_derived.cc: derived tables processing splited on table creation and table filling sql/sql_lex.cc: fixed uninitialized value sql/sql_load.cc: fixed uninitialized value sql/sql_parse.cc: initialization muved (will be done for all queries) sql/sql_prepare.cc: preparation of multiupdate changed a bit because new locking procedure sql/sql_update.cc: new lock for multiupdate: - open and create derived tables - detect which tables should be locked for write - lock and fill derived tables sql/table.h: place to store select_result between creation and filling tables
39 lines
785 B
Plaintext
39 lines
785 B
Plaintext
drop table if exists t1,t2;
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create table t1(n int);
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insert into t1 values (1);
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lock tables t1 write;
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update low_priority t1 set n = 4;
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select n from t1;
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unlock tables;
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n
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4
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drop table t1;
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create table t1(n int);
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insert into t1 values (1);
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lock tables t1 read;
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update low_priority t1 set n = 4;
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select n from t1;
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unlock tables;
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n
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1
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drop table t1;
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create table t1 (a int, b int);
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create table t2 (c int, d int);
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insert into t1 values(1,1);
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insert into t1 values(2,2);
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insert into t2 values(1,2);
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lock table t1 read;
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update t1,t2 set c=a where b=d;
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select c from t2;
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c
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2
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drop table t1;
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drop table t2;
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create table t1 (a int);
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create table t2 (a int);
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lock table t1 write, t2 write;
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insert t1 select * from t2;
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drop table t2;
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ERROR 42S02: Table 'test.t2' doesn't exist
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drop table t1;
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