如何在PL / SQL包中将会话变量skip_unusable_indexes设置为true以加速表删除/插入？

I'm trying to speed up a data load which is controlled via a PL/SQL stored procedure. I've programmatically altered the indexes for the table I want to refresh to be unusable. I want Oracle to ignore these unusable indexes. I can issue the statement:I'm trying to speed up a data load which is con