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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-728) Unable to create databases whose name containg Chinese characters through the client driver
Date Tue, 02 Dec 2008 13:20:44 GMT

    [ https://issues.apache.org/jira/browse/DERBY-728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12652356#action_12652356
] 

Kathey Marsden commented on DERBY-728:
--------------------------------------

I noticed in the drda spec:
4.3.1.13 CCSID Manager
The CCSIDMGR allows the specification of a single-byte character set CCSID to be associated
with character typed parameters on DDM command and DDM reply messages. The CCSID
manager level of the application requester is sent on the EXCSAT command and specifies the
CCSID that the application requester will use when sending character command parameters.

So on the one hand it looks like there is the facility to specify a CCSID to use. I think
it would be 1208 for UTF-8, but it explicitly says it should be a single-byte character set,
so perhaps using UTF-8 is not in compliance with DRDA. But later in an  example it mentions
a server with CCSID 1208.

4.3.5.2 Examples
Below is a simple example of intermediate server processing. The example assumes that each
server has a different CCSID, indicated in the diagram generically as ebcdic, unicode, or
ascii. In
the figure, the upstream requester has an EBCDIC CCSID (such as CCSID 37), the intermediate
server has a Unicode CCSID (such as CCSID 1208)...

So I am not totally sure whether it is legal or not.




> Unable to create databases whose name containg Chinese characters through the client
driver
> -------------------------------------------------------------------------------------------
>
>                 Key: DERBY-728
>                 URL: https://issues.apache.org/jira/browse/DERBY-728
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Client
>    Affects Versions: 10.1.2.1
>         Environment: Debian unstable, LInux 2.6.14.2, libc 2.3.5-6
>            Reporter: Andrei Badea
>
> Trying to create a database with the following URL (note the Chinese character in the
database name):
> jdbc:derby://localhost:1527/\u4e10;create=true
> throws the following exception:
> -----%<-----
> Exception in thread "main" org.apache.derby.client.am.SqlException: Unicode string can't
convert to Ebcdic string
>         at org.apache.derby.client.net.EbcdicCcsidManager.convertFromUCS2(Unknown Source)
>         at org.apache.derby.client.net.Request.writeScalarPaddedString(Unknown Source)
>         at org.apache.derby.client.net.NetConnectionRequest.buildRDBNAM(Unknown Source)
>         at org.apache.derby.client.net.NetConnectionRequest.buildACCSEC(Unknown Source)
>         at org.apache.derby.client.net.NetConnectionRequest.writeAccessSecurity(Unknown
Source)
>         at org.apache.derby.client.net.NetConnection.writeServerAttributesAndKeyExchange(Unknown
Source)
>         at org.apache.derby.client.net.NetConnection.flowServerAttributesAndKeyExchange(Unknown
Source)
>         at org.apache.derby.client.net.NetConnection.flowUSRIDONLconnect(Unknown Source)
>         at org.apache.derby.client.net.NetConnection.flowConnect(Unknown Source)
>         at org.apache.derby.client.net.NetConnection.<init>(Unknown Source)
>         at org.apache.derby.jdbc.ClientDriver.connect(Unknown Source)
>         at java.sql.DriverManager.getConnection(DriverManager.java:525)
>         at java.sql.DriverManager.getConnection(DriverManager.java:193)
>         at jdbctest.Main.main(Main.java:33)
> -----%<-----
> It's possible, however, to create databases using the embedded driver, using an URL like:
> jdbc:derby:\u4e10;create=true
> Tested with both 10.1.1.0 and 10.1.2.1 with the same result.
> Complete code to reproduce the bug:
> -----%<-----
> public static void main(String[] args) throws Exception {
>     Class.forName("org.apache.derby.jdbc.ClientDriver");
>     Connection conn = DriverManager.getConnection("jdbc:derby://localhost:1527/\u4e10;create=true");
> }
> -----%<-----

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