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Date: Tue, 6 Feb 2007 09:15:06 -0800 (PST)
From: "Daniel John Debrunner (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-2260) DatabaseMetaData.getTypeInfo()
 returns incorrect precision for VARCHAR FOR BIT DATA
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    [ https://issues.apache.org/jira/browse/DERBY-2260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12470647 ] 

Daniel John Debrunner commented on DERBY-2260:
----------------------------------------------

It was just a safety check to ensure that a NULL value was not being returned for precision. Probably not required (before the XML changes) since a precision of zero was never returned. We can assume that a NULL will be returned as zero.

Now with the addition of an XML type you need to test that a NULL value is being returned, checking for a precision of 0 is not enough. So for the XML case you need ensure that rs.wasNull() returns true.

> DatabaseMetaData.getTypeInfo() returns incorrect precision for VARCHAR FOR BIT DATA
> -----------------------------------------------------------------------------------
>
>                 Key: DERBY-2260
>                 URL: https://issues.apache.org/jira/browse/DERBY-2260
>             Project: Derby
>          Issue Type: Bug
>    Affects Versions: 10.0.2.1, 10.1.1.0, 10.1.2.1, 10.1.3.1, 10.2.1.6, 10.2.2.0, 10.3.0.0
>            Reporter: Daniel John Debrunner
>         Assigned To: Saurabh Vyas
>            Priority: Minor
>
> PRECISION column for VARCHAR FOR BIT DATA is returned as 32762, but maximum precision is 32672 (6 & 7 swapped).
> ij> create table z (a varchar(32672) for bit data);
> 0 rows inserted/updated/deleted
> ij> create table z2(a varchar(32673) for bit data);
> ERROR 42611: The length, precision, or scale attribute for column, or type mapping 'VARCHAR (32673) FOR BIT DATA' is not valid.

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