| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, Dimitri Fontaine <dimitri(at)2ndquadrant(dot)fr> |
| Subject: | Re: Deparsing DDL command strings |
| Date: | 2012-10-05 14:24:55 |
| Message-ID: | 8552.1349447095@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On Friday, October 05, 2012 04:03:03 PM Tom Lane wrote:
>> Why don't you just pass the original query string, instead of writing
>> a mass of maintenance-requiring new code to reproduce it?
> Its not easy to know which tables are referenced in e.g. an ALTER TABLE
> statement if the original statement didn't schema qualify everything.
What he's talking about is deparsing the raw grammar output, which by
definition contains no more information than is in the query string.
Deparsing post-parse-analysis trees is a different problem (for which
code already exists, unlike the raw-tree case).
regards, tom lane
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