From: | Oliver Jowett <oliver(at)opencloud(dot)com> |
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To: | Luca Ferrari <fluca1978(at)infinito(dot)it> |
Cc: | pgsql-jdbc(at)postgresql(dot)org |
Subject: | Re: ResultSet internal data type handling |
Date: | 2009-05-12 08:44:33 |
Message-ID: | 4A0936F1.3010005@opencloud.com |
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Thread: | |
Lists: | pgsql-jdbc |
Luca Ferrari wrote:
> Having a look at jdbc2.AsbtractJDBC2ResultSet (the parent of all ResultSets) I
> discovered that all data received from the server is handled internally as a
> string (right?) and is converted from the getXXX methods into the appropriate
> type. This means that you can actually write a getString on a date field
> obtaining a valida date (and if you are lucky you can do something the
> opposite). I'm curious to know if this is an implementation choice or a jdbc
> specification and why the objects are not checked against the table metadata
> (as the getInternalObject method does).
There's a table in the JDBC spec that lists the basic type conversions
that a JDBC driver must support. Most types can be converted to strings,
from memory.
-O
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