The query optimization class is used to direct the optimizer to use different degrees of optimization when compiling SQL queries
查询优化类用于在编译SQL 查询时指导优化器使用不同的优化级别。
The query optimization class is used to direct the optimizer to use different degrees of optimization when compiling SQL queries
查询优化类用于在编译SQL 查询时指导优化器使用不同的优化级别。
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