Dave wrote: > What I'm trying to do is to create a foreign key on tb1_column so that if a > number in tb2_column changes or gets deleted, it cascades to the appropriate > segment of the serialized data. > e.g. if an id of Oranges changes from '5' to '24', the tb1_column rows will > get changed in the above example row to: > a:5:{i:0;s:1:"9";i:1;s:2:"24";i:2;s:2:"11";i:3;s:2:"100";i:4;s:2:"10";} No offense, but that sounds like sick application design. Anyway, a plphp trigger can do it: http://www.commandprompt.com/community/plphp -- Best regards, Hannes Dorbath ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match