[HIVE-23171] Create Tool To Visualize Hive Parser Tree

• Type: Sub-task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.0.0-alpha-1
• Assignee: David Mollitor
• Reporter: David Mollitor
• Created: 09/Apr/20 18:02
• Updated: 17/Nov/22 08:50
• Resolved: 16/Apr/20 14:33

Description

For some of the work I would like to do on HIVE-23149, it would be nice to visualize the output of the statement parser.

I have created a tool that spits out the parser tree in DOT file format. This allows it to be visualized using a plethora of tools.

To use it, compile the hive-parser test JAR and run it.  The application takes a single command line argument of a String.  The String is the SQL statement to parse:

HqlParser "SELECT 1"

I have attached an example of the output that I generated for a SELECT 1 statement: