The import utility accomplishes this by requesting an exclusive (X) lock on the table at the beginning of an ALLOW NO ACCESS import operation.

import 工具实现这一点的方法是在 ALLOW NO ACCESS 导入操作的开始请求目标表上的一个排他（X）锁。

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As Table 3 shows, we achieved the fastest import times by having no authentication on the Subversion server.

如表3所示，如果在Subversion服务器上不进行认证，则可以取得最快的导入时间。

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identitymissing no yes yes Specifies that the import or load input file does not contain any values for the identity column in the target table. Given load input file custdata.del

identitymissing no yes yes 指定导入或载入输入文件不包含任何目标表中标识列的值。

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