From: | Thomas Kellerer <spam_eater(at)gmx(dot)net> |
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To: | pgsql-jdbc(at)postgresql(dot)org |
Subject: | Re: DatabaseMetaData.getTables returns lower-case column names |
Date: | 2013-05-17 15:22:50 |
Message-ID: | 51964B4A.2080504@gmx.net |
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Lists: | pgsql-jdbc |
Július Štroffek wrote on 17.05.2013 17:06:
> I am using eclipselink with pgsql jdbc driver '9.2-1002 JDBC 4' and
> when eclipselink tries to get the list of available tables using the
> ${subject} function PostgreSQL JDBC will return the result having the
> column names lower case.
>
> The JDBC API clearly describes them as upper-case, see
> http://docs.oracle.com/javase/6/docs/api/java/sql/DatabaseMetaData.html#getTables%28java.lang.String,%20java.lang.String,%20java.lang.String,%20java.lang.String[]%29
I don't see any statement that claims the table or column names should be returned in upper case.
The driver should always return the names as _stored in the database_ which could mean lowercase, uppercase or mixed case depending on the DBMS. To find out _how_ the DBMS stores them you can use storesLowerCaseIdentifiers(), storesMixedCaseIdentifiers() and storesUpperCaseIdentifiers()
> Is there any reason why the names are returned as lower case?
Yes, because Postgres stores all (unquoted) identifiers in lowercase.
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