Dilip Joseph created HIVE-3884:
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Summary: Better align columns in DESCRIBE table_name output to
make more human-readable
Key: HIVE-3884
URL: https://issues.apache.org/jira/browse/HIVE-3884
Project: Hive
Issue Type: Improvement
Components: CLI
Affects Versions: 0.9.0
Reporter: Dilip Joseph
Priority: Minor
If a table contains very long comments or very long column names, the output of
DESCRIBE table_name is not aligned nicely. The attached screenshot shows the
following two problems:
1. Rows with long column names do not align well with other columns.
2. Rows with long comments wrap to the next line, and make it hard to read the
output. The wrapping behavior depends on the width of the user's terminal
width.
It will be nice to have a DESCRIBE PRETTY table_name command that will produce
nicely formatted output that avoids the two problems mentioned above. It is
better to introduce a new DESCRIBE PRETTY command rather than change the
behavior of the existing DESCRIBE or DESCRIBE FORMATTED commands, so that we
avoid breaking any scripts that automatically parse the output.
Since the pretty formatting depends on the current terminal width, we need a
new hive conf parameter to tell the CLI to auto-detect the current terminal
width or to use a fixed width (needed for unit tests).
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