[IGNITE-6276] SQL: Investigate parser generators

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Fix Version/s: 2.4
• Component/s: sql
• Assignee: Sergey Kalashnikov
• Reporter: Sergey Kalashnikov
• Created: 06/Sep/17 09:31
• Updated: 08/Nov/17 15:15
• Resolved: 08/Nov/17 15:15

Description

Now ignite relies on H2 for SQL processing. It has been discussed many times on dev list that we must start introducing our own SQL core in small incremental steps.

Let's start with analyzing the options for implementing the parser part.

We may begin with http://www.antlr.org/ and create a simple separate project that would generate the parser for some simple DDL commands like DROP INDEX.
This will give us a hint on the complexity and limitations of the approach.

1) Set up Maven/ANTLR.
2) Prepare lexer/parser.
3) Generate.
4) Write a test.

Issue Links

• relates to: IGNITE-6320 SQL: ANTLR performance assessment
• relates to: IGNITE-6769 SQL: prototype for hand-made parser