| Class | Description | 
|---|---|
| ColumnSizes | Given a set of paths, finds all of the "*.orc" files under them and
 prints the sizes of each column, both as a percentage and the number of
 bytes per a row. | 
| Driver | Driver program for the java ORC utilities. | 
| FileDump | A tool for printing out the file structure of ORC files. | 
| JsonFileDump | File dump tool with json formatted output. | 
| KeyTool | Print the information about the encryption keys. | 
| PrintData | Print the contents of an ORC file as JSON. | 
| PrintVersion | Print the version of this ORC tool. | 
| RowCount | Given a set of paths, finds all of the "*.orc" files under them and prints the number of rows in each file. | 
| ScanData | Scan the contents of an ORC file. | 
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