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MDEV 13679 Enabled sequences to be used in DEFAULT
Other changes done to get this to work: - Added 'internal_tables' to TABLE object to list which sequence tables is needed to use the table. - Mark any expression using DEFAULT() with LEX->default_used. This is needed when deciding if we should open internal sequence tables when a table is opened (we don't need to open sequence tables if the main table is only used with SELECT). - Create_and_open_temporary_table() can now also open all internal sequence tables. - Added option MYSQL_LOCK_USE_MALLOC to mysql_lock_tables() to force memory allocation to be used with malloc instead of memroot. - Added flag to MYSQL_LOCK to remember if allocation was done with malloc or memroot (makes code simpler and safer). - init_one_table_for_prelocking() now takes argument for what lock to use instead of it's a routine or something else. - Renamed prelocking placeholders to make them more understandable as they are now used in more code. - Changed test in check_lock_and_start_stmt() if found table has correct locks. The old test didn't work for tables that has lock TL_WRITE_ALLOW_WRITE, which is what sequence tables are using. - Added VCOL_NOT_VIRTUAL option to ensure that sequence functions can't be used with virtual columns - More sequence tests
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Monty
171
mysql-test/suite/sql_sequence/default.result
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171
mysql-test/suite/sql_sequence/default.result
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@ -0,0 +1,171 @@
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drop table if exists t1,s1,s2;
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Warnings:
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Note 1051 Unknown table 'test.t1'
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Note 1051 Unknown table 'test.s1'
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Note 1051 Unknown table 'test.s2'
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drop view if exists v1;
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Warnings:
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Note 4092 Unknown VIEW: 'test.v1'
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#
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# Test DEFAULT
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#
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CREATE SEQUENCE s1 nocache engine=myisam;
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CREATE table t1 (a int default next value for s1, b int);
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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 nextval(`test`.`s1`),
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`b` int(11) DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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insert into t1 SET b=1;
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insert into t1 SET b=2;
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insert into t1 (b) values (3),(4);
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select * from t1;
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a b
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1 1
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2 2
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3 3
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4 4
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update t1 set b=5 where a=1;
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delete from t1 where b=1;
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select * from t1;
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a b
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1 5
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2 2
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3 3
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4 4
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#
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# Executing DEFAULT function
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#
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INSERT into t1 values(default(a),10);
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INSERT into t1 values(default(a),default(a));
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update t1 set a=default(a), b=12 where b=2;
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select * from t1;
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a b
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1 5
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8 12
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3 3
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4 4
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5 10
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6 7
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select default(a), a, b from t1;
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default(a) a b
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9 1 5
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10 8 12
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11 3 3
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12 4 4
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13 5 10
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14 6 7
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select * from s1;
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next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
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15 1 9223372036854775806 1 1 0 0 0
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select * from t1 where default(a) > 0;
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a b
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1 5
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8 12
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3 3
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4 4
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5 10
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6 7
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select * from s1;
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next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
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16 1 9223372036854775806 1 1 0 0 0
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#
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# View
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#
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create view v1 as select * from t1;
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insert into v1 set b=20;
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select * from v1;
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a b
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1 5
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8 12
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3 3
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4 4
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5 10
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6 7
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16 20
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drop view v1;
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#
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# Alter table
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#
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CREATE SEQUENCE s2 nocache engine=myisam;
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alter table t1 add column c int default next value for s2, add column d int default previous value for s2;
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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 nextval(`test`.`s1`),
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`b` int(11) DEFAULT NULL,
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`c` int(11) DEFAULT nextval(`test`.`s2`),
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`d` int(11) DEFAULT lastval(`test`.`s2`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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select * from t1;
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a b c d
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1 5 1 1
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8 12 2 2
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3 3 3 3
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4 4 4 4
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5 10 5 5
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6 7 6 6
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16 20 7 7
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drop sequence s2;
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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 nextval(`test`.`s1`),
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`b` int(11) DEFAULT NULL,
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`c` int(11) DEFAULT nextval(`test`.`s2`),
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`d` int(11) DEFAULT lastval(`test`.`s2`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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drop sequence s1;
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#
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# LOCK TABLES
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#
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CREATE SEQUENCE s1 nocache engine=myisam;
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CREATE table t1 (a int default next value for s1, b int);
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insert into t1 (b) values (3),(4);
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LOCK TABLE t1 WRITE;
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insert into t1 (b) values (5),(6);
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ERROR HY000: Table 's1' was not locked with LOCK TABLES
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UNLOCK TABLES;
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LOCK TABLE t1 WRITE, s1 WRITE;
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insert into t1 (b) values (5),(6);
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select default(a) from t1;
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default(a)
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5
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6
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7
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8
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UNLOCK TABLES;
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LOCK TABLE t1 READ;
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insert into t1 (b) values (5),(6);
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ERROR HY000: Table 's1' was not locked with LOCK TABLES
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select default(a) from t1;
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ERROR HY000: Table 's1' was not locked with LOCK TABLES
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UNLOCK TABLES;
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LOCK TABLE t1 READ, s1 read;
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insert into t1 (b) values (5),(6);
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ERROR HY000: Table 't1' was locked with a READ lock and can't be updated
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select default(a) from t1;
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ERROR HY000: Table 's1' was locked with a READ lock and can't be updated
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UNLOCK TABLES;
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drop table t1;
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drop sequence s1;
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#
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# Wrong usage of default
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#
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CREATE table t1 (a int default next value for s1, b int);
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ERROR 42S02: Table 'test.s1' doesn't exist
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CREATE SEQUENCE s1 nocache engine=myisam;
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CREATE table t1 (a int default next value for s1, b int);
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DROP SEQUENCE s1;
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insert into t1 (b) values (5),(6);
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ERROR 42S02: Table 'test.s1' doesn't exist
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ALTER TABLE t1 add column c int;
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ERROR 42S02: Table 'test.s1' doesn't exist
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CREATE SEQUENCE s1 nocache engine=myisam;
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ALTER TABLE t1 add column c int;
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ALTER TABLE t1 add column d int default next value for s_not_exits;
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ERROR 42S02: Table 'test.s_not_exits' doesn't exist
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drop table t1;
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drop sequence s1;
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