直接路径读 - direct path reads

原文地址：https://docs.oracle.com/en/database/oracle/oracle-database/12.2/tgsql/optimizer-access-paths.html#GUID-1F4CDA9A-7419-44F6-89E0-395C92285015 8.2.1.3 Direct Path Reads In a direct path read, the da

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