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Re: JDBC bug?

From: Barry Lind <barry(at)xythos(dot)com>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: JDBC bug?
Date: 2001-11-26 20:34:43
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-jdbc

Bruce Momjian wrote:

>>I haven't seen any evidence in this thread of a JDBC bug.  The original 
>>posting refered to calls in the DatabaseMetaData classes doing 
>>toLowerCase().  This is appropriate because the DatabaseMetaData class 
>>is querying the pg_* tables to get information about database objects, 
>>thus since the backend stores the identifiers in lower case, therefore 
>>the jdbc code needs to do a toLowerCase().  The followup below is more 
> But the backend doesn't store identifiers in lowercase if they have
> created mixed-case identifiers with double-quotes, right?  I am
> confused.

Correct.  But if you ask the API to get information about table myTable, 
you should get an answer back for a table created as (create table 
myTable (foo text)).  The only way to do this is to lowercase the input 
to match what the database is storing (mytable in this case).  I agree 
that if the table is created with a mixed case identifier (create table 
"myTable" (foo text)) then there isn't a need to lower case in the 
driver.  Therefore the fact that there are a bunch of calls to 
toLowerCase() in the jdbc code for DatabaseMetaData doesn't mean that 
there is a bug here as they are entirely appropriate under some 
circumstances.  If someone produces a test case that demonstrates a bug 
I will be glad to look into it.  But up to this point there has only 
been a lot of speculation on code that may be entirely correct.  Test 
cases demonstrating a real problem would be much apprecieated in this case.


>>of a complaint on how SQL is case insensitive and if you have created 
>>your objects with quoted mixed case identifiers you need to access them 
>>via quoted mixed case identifiers.  I haven't seen any evidence that 
>>basic SQL operations (select, insert, update, delete) have a bug in them.

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Subject: Re: JDBC bug?
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