STAR_JOIN—STAR_JOIN指令指示优化器尽可能地选择星型连接计划。
STAR_JOIN - the STAR_JOIN directive instructs the optimizer to favor a star join plan whenever possible.
如果查询中使用星型连接指令，指令会将会话环境设置覆盖。
If star join directives are used in a query, directives override session environment setting.
系统在处理过程中将重复坐标和连接活动指令。
The system will then repeat the coordinates and joint action commands during the process.
使用这条指令你可以设置代理连接的超时时间。
With this directive you can set the timeout for the proxy connection.
使用这条指令你可以设置代理连接的超时时间。
With this directive you can set the timeout for the proxy connection.
应用推荐