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Add Foreign Constraint doubt


logicslab

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Hi pals,

 

I create 2 tables with name tbl_project and tbl_issue and I plan to give

Foreign key constraint for tbl_issue by giving alter table command as

"ALTER TABLE `testdrive`.`tbl_issue` ADD CONSTRAINT `FK_issue_project` FOREIGN KEY

 

(`project_id`) REFERENCES `tbl_project`(`id`) ON DELETE CASCADE ON UPDATE RESTRICT"

 

It's successfully executed and when I check the table tbl_issue I found the

Alter table command as "ALTER TABLE `tbl_issue`

  ADD CONSTRAINT `FK_issue_project` FOREIGN KEY (`project_id`) REFERENCES `tbl_project` (`id`) ON DELETE CASCADE;"

 

there missing the "UPDATE RESTRICT" , I feel wonder why this like that ? Do you any one

can explain why this ? If you have idea PLS EXPLAIN

 

THANKS

ANES

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