[HIVE-14908] Upgrade ANTLR to 3.5.2

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 2.3.0
• Assignee: Pengcheng Xiong
• Reporter: Pengcheng Xiong
• Created: 07/Oct/16 06:21
• Updated: 01/Oct/19 22:07
• Resolved: 08/Nov/16 07:11

Description

Antlr v4 is also available but it does not support "->" which is widely used in our grammar. Antlr 3.5.2 is the latest v3 version. It will reduce the code size:

Here is summary of current parser code size

422345  HiveLexer.java
2436601  HiveParser.java
814184  HiveParser_FromClauseParser.java
2705920  HiveParser_IdentifiersParser.java
777665 HiveParser_SelectClauseParser.java

   After change, it will become

319589 HiveLexer.java
1853104 HiveParser.java
574156 HiveParser_FromClauseParser.java
1799195 HiveParser_IdentifiersParser.java
587305 HiveParser_SelectClauseParser.java