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db7edfed17
MDEV-10134 Add full support for DEFAULT - Added support for using tables with MySQL 5.7 virtual fields, including MySQL 5.7 syntax - Better error messages also for old cases - CREATE ... SELECT now also updates timestamp columns - Blob can now have default values - Added new system variable "check_constraint_checks", to turn of CHECK constraint checking if needed. - Removed some engine independent tests in suite vcol to only test myisam - Moved some tests from 'include' to 't'. Should some day be done for all tests. - FRM version increased to 11 if one uses virtual fields or constraints - Changed to use a bitmap to check if a field has got a value, instead of setting HAS_EXPLICIT_VALUE bit in field flags - Expressions can now be up to 65K in total - Ensure we are not refering to uninitialized fields when handling virtual fields or defaults - Changed check_vcol_func_processor() to return a bitmap of used types - Had to change some functions that calculated cached value in fix_fields to do this in val() or getdate() instead. - store_now_in_TIME() now takes a THD argument - fill_record() now updates default values - Add a lookahead for NOT NULL, to be able to handle DEFAULT 1+1 NOT NULL - Automatically generate a name for constraints that doesn't have a name - Added support for ALTER TABLE DROP CONSTRAINT - Ensure that partition functions register virtual fields used. This fixes some bugs when using virtual fields in a partitioning function
97 lines
3.1 KiB
Text
97 lines
3.1 KiB
Text
set @save_check_constraint=@@check_constraint_checks;
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create table t1 (a int check(a>10), b int check (b > 20), constraint `min` check (a+b > 100), constraint `max` check (a+b <500)) engine=myisam;
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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 CHECK (a>10),
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`b` int(11) DEFAULT NULL CHECK (b > 20),
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CONSTRAINT `min` CHECK (a+b > 100),
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CONSTRAINT `max` CHECK (a+b <500)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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insert into t1 values (100,100);
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insert into t1 values (1,1);
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ERROR HY000: CONSTRAINT 'a' failed for 'test.t1'
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insert into t1 values (20,1);
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ERROR HY000: CONSTRAINT 'b' failed for 'test.t1'
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insert into t1 values (20,30);
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ERROR HY000: CONSTRAINT 'min' failed for 'test.t1'
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insert into t1 values (500,500);
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ERROR HY000: CONSTRAINT 'max' failed for 'test.t1'
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insert into t1 values (101,101),(102,102),(600,600),(103,103);
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ERROR HY000: CONSTRAINT 'max' failed for 'test.t1'
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select * from t1;
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a b
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100 100
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101 101
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102 102
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truncate table t1;
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insert ignore into t1 values (101,101),(102,102),(600,600),(103,103);
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Warnings:
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Warning 1369 CONSTRAINT 'max' failed for 'test.t1'
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select * from t1;
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a b
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101 101
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102 102
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103 103
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set check_constraint_checks=0;
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truncate table t1;
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insert into t1 values (101,101),(102,102),(600,600),(103,103);
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select * from t1;
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a b
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101 101
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102 102
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600 600
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103 103
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set check_constraint_checks=@save_check_constraint;
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alter table t1 add c int default 0 check (c < 10);
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ERROR HY000: CONSTRAINT 'max' failed for table
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set check_constraint_checks=0;
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alter table t1 add c int default 0 check (c < 10);
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alter table t1 add check (a+b+c < 500);
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set check_constraint_checks=@save_check_constraint;
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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 CHECK (a>10),
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`b` int(11) DEFAULT NULL CHECK (b > 20),
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`c` int(11) DEFAULT '0' CHECK (c < 10),
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CONSTRAINT `min` CHECK (a+b > 100),
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CONSTRAINT `max` CHECK (a+b <500),
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CONSTRAINT `CONSTRAINT_1` CHECK (a+b+c < 500)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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insert into t1 values(105,105,105);
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ERROR HY000: CONSTRAINT 'c' failed for 'test.t1'
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insert into t1 values(249,249,9);
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ERROR HY000: CONSTRAINT 'CONSTRAINT_1' failed for 'test.t1'
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insert into t1 values(105,105,9);
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select * from t1;
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a b c
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101 101 0
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102 102 0
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600 600 0
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103 103 0
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105 105 9
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create table t2 like t1;
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`a` int(11) DEFAULT NULL CHECK (a>10),
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`b` int(11) DEFAULT NULL CHECK (b > 20),
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`c` int(11) DEFAULT '0' CHECK (c < 10),
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CONSTRAINT `min` CHECK (a+b > 100),
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CONSTRAINT `max` CHECK (a+b <500),
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CONSTRAINT `CONSTRAINT_1` CHECK (a+b+c < 500)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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alter table t2 drop constraint c;
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ERROR 42000: Can't DROP 'c'; check that constraint/column/key exists
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alter table t2 drop constraint min;
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`a` int(11) DEFAULT NULL CHECK (a>10),
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`b` int(11) DEFAULT NULL CHECK (b > 20),
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`c` int(11) DEFAULT '0' CHECK (c < 10),
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CONSTRAINT `max` CHECK (a+b <500),
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CONSTRAINT `CONSTRAINT_1` CHECK (a+b+c < 500)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1,t2;
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