来源于:EA 中的 Interaction Operators Enterprise Architect User Guide Operator Action alt Divide up interaction fragments based on Boolean conditions. opt Enclose an optional fragment of interaction. par Indicate that operands operate in parallel. loop Ind…
From http://blog.csdn.net/wujiandao/article/details/6621073 1. Four ways to get execution plan(anytime you want, for specified sql) • Execute the SQL statement EXPLAIN PLAN, and then query the table where the output was written. • Query a dynamic per…