Specifying DIRECT=y causes Export to extract data by reading the data directly, bypassing the SQL command-processing layer (evaluating buffer). This method can be much faster than a conventional path Export.以上为ORACLE官方原文。主要意思就是指定DIRECT=y后，oracle会避开sql语句处理引擎,直接从数据库文件中读取数据,然后写入导出文件
bypassing the SQL command-processing layer (evaluating buffer). This method can be
much faster than a conventional path Export.以上为ORACLE官方原文。主要意思就是指定DIRECT=y后，oracle会避开sql语句处理引擎,直接从数据库文件中读取数据,然后写入导出文件