Just get column names from hive table

Question

I know that you can get column names from a table via the following trick in hive:

hive> set hive.cli.print.header=true;
hive> select * from tablename         


        

Answer 1

use desc tablename from Hive CLI or beeline to get all the column names. If you want the column names in a file then run the below command from the shell.

$ hive -e 'desc dbname.tablename;' > ~/columnnames.txt

where dbname is the name of the Hive database where your table is residing You can find the file columnnames.txt in your root directory.

$cd ~
$ls

Answer 2

If you simply want to see the column names this one line should provide it without changing any settings:

describe database.tablename;

However, if that doesn't work for your version of hive this code will provide it, but your default database will now be the database you are using:

use database;
describe tablename;

Answer 3

you could also do show columns in $table or see Hive, how do I retrieve all the database's tables columns for access to hive metadata