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I'm new to hive and could use some tips.
I'm trying to export query results from hive as a csv. When I try to pipe them out of CLI like:
hive -e 'select * from table'>OutPut.txt
I get a text file that has all the records but doesn't have the column headers. Does anyone have a tip for how to export the query results with the column headers, to a csv file?
If I run the query in hue, and then download the results as a csv I get a csv with the column headers but no records. If anyone has a tip on how to download query results from hue with records and column headers, I would greatly appreciate it too.
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To directly save the file in HDFS, use the below command: hive> insert overwrite directory '/user/cloudera/Sample' row format delimited fields terminated by '\t' stored as textfile select * from table where id >100; This will put the contents in the folder /user/cloudera/Sample in HDFS. Show activity on this post.
To export the column headers, you need to set the following in the hiverc file:
set hive.cli.print.header=true;
To get just the headers into a file, you could try the following:
hive -e 'set hive.cli.print.header=true; SELECT * FROM TABLE_NAME LIMIT 0;' > /file_path/file_name.txt
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