Re: Doubt in parser

Dhanaraj wrote:
> hi
>
> currently i looking at the postgres src code. I saw the scanner and
> parser implemetations at two different places (src/backend/parser/ and
> /src/bakend/bootstrp). Can anybody tell me the purpose of having two
> phases?? or will this help to parse the queries at different levels?

The bootstrap parser is using only in bootstrap mode, which is when the
template1 database is initially created. It has a completely different
syntax than the main parser.

If what you are looking for is to implement a new command or modify an
existing one, ignore the bootstrap parser.

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.