[DRILL-4089] Make JSON pretty printing configurable

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.0
• Fix Version/s: 1.4.0
• Assignee: Hanifi Gunes
• Reporter: Hanifi Gunes
• Reviewer: Khurram Faraaz
• Created: 13/Nov/15 20:38
• Updated: 07/Jan/16 07:37
• Resolved: 17/Nov/15 18:35

Description

Currently JSON record writer emits records pretty-printed and there is no way to configure this behavior. This issue proposes to make this configurable via a prettyPrint switch in storage execution configuration with default value of true to ensure backward compatibility.

As a guideline, the following should be used to dictate Drill to emit records in JSON.

alter [session|sytem] set `store.format`='json';

and this new switch should be used to turn off pretty printing:

alter [session|sytem] set `store.json.writer.uglify`=true;

By default, Drill will use system dependent line feed to seperate JSON blobs when pretty printing turned off.