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Code Activity

MDEV-7563 Support CHECK constraint as in (or close to) SQL Standard

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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
This commit is contained in:
Michael Widenius
2016-06-29 09:14:22 +02:00
committed by Sergei Golubchik
parent 23d03a1b1e
commit db7edfed17
165 changed files with 5793 additions and 6325 deletions
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54
mysql-test/t/check_constraint.test Normal file
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#
# Check of check constraints
set @save_check_constraint=@@check_constraint_checks;
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;
show create table t1;
insert into t1 values (100,100);
--error ER_CONSTRAINT_FAILED
insert into t1 values (1,1);
--error ER_CONSTRAINT_FAILED
insert into t1 values (20,1);
--error ER_CONSTRAINT_FAILED
insert into t1 values (20,30);
--error ER_CONSTRAINT_FAILED
insert into t1 values (500,500);
--error ER_CONSTRAINT_FAILED
insert into t1 values (101,101),(102,102),(600,600),(103,103);
select * from t1;
truncate table t1;
insert ignore into t1 values (101,101),(102,102),(600,600),(103,103);
select * from t1;
set check_constraint_checks=0;
truncate table t1;
insert into t1 values (101,101),(102,102),(600,600),(103,103);
select * from t1;
set check_constraint_checks=@save_check_constraint;
--replace_regex /failed for.*/failed for table/
--error ER_CONSTRAINT_FAILED
alter table t1 add c int default 0 check (c < 10);
set check_constraint_checks=0;
alter table t1 add c int default 0 check (c < 10);
alter table t1 add check (a+b+c < 500);
set check_constraint_checks=@save_check_constraint;
show create table t1;
--error ER_CONSTRAINT_FAILED
insert into t1 values(105,105,105);
--error ER_CONSTRAINT_FAILED
insert into t1 values(249,249,9);
insert into t1 values(105,105,9);
select * from t1;
create table t2 like t1;
show create table t2;
--error ER_CANT_DROP_FIELD_OR_KEY
alter table t2 drop constraint c;
alter table t2 drop constraint min;
show create table t2;
drop table t1,t2;