随笔分类 -  Other_DB

摘要：原因分析：You are running out of allocted memory for the JAVA VM (128k) is to less.Modify the line below (..."128k"...) to reach a stack size of at least 160k in the filepicked from :http://stackoverflow.com/questions/11610856/ubuntu-12-04-and-cassandra-install-heapdumponoutofmemoryerror-xss128 阅读全文

摘要：列级触发器就是对表中的某列进行添加或修改时所执行的触发器。建立列级触发器与建立触发器的语法是相同的，只是在创建时使用IF UPDATE（column）参数。语法：CREATE TRIGGER trigger_nameON { table | view }[ WITH ENCRYPTION ]{{ { FOR | AFTER | INSTEAD OF } { [ INSERT ] [ , ] [ UPDATE ] }[ WITH APPEND ][ NOT FOR REPLICATION ]AS[ { IF UPDATE ( column )[ { AND | OR } UPDATE ( col 阅读全文