[HIVE-21346] Refactor Hive DDL

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Hive
• Labels: refactor-ddl
• Assignee: Miklos Gergely
• Reporter: Miklos Gergely
• Created: 28/Feb/19 12:24
• Updated: 21/Jun/19 21:47

Description

Hive DDL has multiple problems:

• DDLTask is a huge class, needs to be cut to smaller pieces
• DDLSemanticAnalyzer is a huge class, needs to be cut to smaller pieces
• DDLWork has a bad structure by having a field for every possible DDL operation
• DDLDesc subclasses are put into one package which has an endless list of classes, should be separated by subjects
• Many DDLDesc subclasses are not immutable

Sub-Tasks

• Extract Create Materialized View analyzer from SemanticAnalyzer: Open