Description:
Check whether there is a specified file or folder in HDFS and return a Boolean value.
Syntax:
hdfs_exists(hd,file/path)
Note:
The external library function (See External Library Guide) checks whether a file or a folder exists and returns a Boolean value.
Parameter:
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hd |
An hd connection. |
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file |
Hadoop file name. |
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path |
Hadoop path name. |
Return value：
Boolean
Example:
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=hdfs_open("hdfs://192.168.0.76:9000") |
Connect to HDFS file system. |
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=hdfs_exists(A1,"/user") |
Check whether folder user exists. |
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=hdfs_exists(A1,"/user/emp.txt") |
Check whether file emp.txt exists. |
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=hdfs_close(A1) |
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