Looking at the DESC FORMATTED command again, I still feel it is not very clear for the table property section. For table properties, I think it is not very good for DESC command to print the default value if the user does not specify when creating the table. Because the default value in CarbonCommonConstain file may change from version to version, I think it is better to always write the default value to table property (in schema file) when loading the table. Then in DESC table, we can always get the table properties from the schema file.
So I suggest we do following: 1. categorize the properties into file level, table level, system level 2. write the file level property into data file's footer, including all file level properties either specified by user or from default value. 3. write the table level property into schema file, including all table level properties either specified by user or from default value. 4. DESC command should print the properties read from the schema file, which should contain all table level properties. Another suggestion is that besides just printing the schema and table properties like the standard hive DESC command, we can introduce another command to print the output from calling CarbonCli tool for more profiling and debugging information, like writing how many files the table contains, what is the average size of page/blocklet, min/max percentage etc. For example, the syntax of this command can be "SUMMARY table_name" Regards, Jacky -- Sent from: http://apache-carbondata-dev-mailing-list-archive.1130556.n5.nabble.com/
