From: | "Thomas G(dot) Lockhart" <lockhart(at)alumni(dot)caltech(dot)edu> |
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To: | Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp> |
Cc: | pgsql-hackers(at)postgreSQL(dot)org |
Subject: | Re: [HACKERS] cannot cast bpchar and varchar |
Date: | 1999-02-10 04:32:24 |
Message-ID: | 36C10BD8.A99D0F86@alumni.caltech.edu |
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Thread: | |
Lists: | pgsql-hackers |
> It seems that casting varchar and bpchar does not work.
Hmmm. It seems to be a combination of two problems:
1) not knowing which type should be preferred (or how to compare varchar
and bpchar; should I strip the blank padding from a bpchar? Probably
so...).
2) swallowing the type coersions since bpchar, varchar, and text are
considered to be binary compatible. I may have seen another instance of
this being a problem, and perhaps should figure out how to propagate the
new coerced type into the query rather than dropping it.
Will look at this. Question: how *should* we compare bpchar and varchar?
It may be that we should have some explicit comparison or coersion
routines to make things work smoothly.
Thanks for the report.
- Tom
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