Re: pg_get_domaindef

On Fri, 19 Jan 2007 17:02, Neil Conway wrote:
> On Sat, 2007-01-20 at 02:28 +1100, FAST PostgreSQL wrote:
> > Attached is a small patch that implements the pg_get_domaindef(oid)
> > function.
>
> A few minor comments:
>
> - don't use C++-style comments

OK. Can do.

>
> - why does this code append a "-" to the output when SPI_processed != 1,
> rather than erroring out?

get_ruledef() does the same. As the user gets a '-' in that case when a
non-existent oid is given, I just wanted to be consistent. Maybe a wrong
idea ?

>
> - you probably want to elog(ERROR) if typeTuple is invalid:

Of course.

> + if (typnotnull || constraint != NULL)
> + {
> + if ( ( (contype != NULL) && (strcmp(contype,
> "c") != 0) ) || typnotnull )
> + {
> + appendStringInfo(&buf, "CONSTRAINT ");
> + }
> + if (typnotnull)
> + {
> + appendStringInfo(&buf, "NOT NULL ");
> + }
> + }
> + if (constraint != NULL)
> + {
> + appendStringInfo(&buf,
> quote_identifier(constraint));
> + }
>
> This logic seems pretty awkward. Perhaps simpler would be a check for
> typnotnull (and then appending "CONSTRAINT NOT NULL"), and then handling
> the non-typnotnull branch separately.

Yeah agree.

>
> -Neil

Rgds,
Arul Shaji

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