The operator class also specifies the support procedures to be used by the index method when the operator class is selected for an index column.
操作符表还声明索引方法在为一个索引字段选定该操作符表的时候要使用的支持过程。
The operator class also specifies the support procedures to be used by the index method when the operator class is selected for an index column.
操作符表还声明索引方法在为一个索引字段选定该操作符表的时候要使用的支持过程。
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