From: Aleksander Alekseev <a.alekseev@postgrespro.ru>
To: Pavel Stehule <pavel.stehule@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Arcadiy Ivanov <arcadiy@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Subject: Re: Parser extensions (maybe for 10?)
Date: Mon, 18 Apr 2016 18:25:23 +0300
Message-ID: <20160418182523.3f70ad88@fujitsu> (raw)
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> I cannot to imagine extensible parser based on bison. But the parser
> can be replaced by custom parser.
>
> Some like pgpool or pgbouncer does. The extension can assign own
> parser. Custom parser will be called first, and the integrated parser
> will be used from extension or as fallback. This can helps with new
> statements for background workers, theoretically it can helps with
> extending PostgreSQL SQL. Custom parser can do translation from SQL1
> to SQL2 dialect, or can do translation from SQL1 to internal calls.
> The custom parser usually should not implement full SQL - only few
> statements.
>
> Is it this idea more workable?
What if there are two or more contribs that extend the parser? Can we
be sure that these contribs will not conflict?
--
Best regards,
Aleksander Alekseev
http://eax.me/
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Cc: a.alekseev@postgrespro.ru, pavel.stehule@gmail.com, tgl@sss.pgh.pa.us, arcadiy@gmail.com
Subject: Re: Parser extensions (maybe for 10?)
In-Reply-To: <20160418182523.3f70ad88@fujitsu>
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