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https://issues.apache.org/jira/browse/DERBY-52?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12665062#action_12665062
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Kristian Waagan commented on DERBY-52:
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The maximum length of the CHAR data type is 254 characters.
As far as I can see, the reference manual still doesn't specify the maximum
length of CHAR correctly in all places.
Wrong/not-mentioned:
http://db.apache.org/derby/docs/dev/ref/ref-single.html#rrefsqlj13733
Correct:
http://db.apache.org/derby/docs/dev/ref/ref-single.html#rrefstringlimits
I filed DERBY-4025 to get the documentation fixed.
> Cannot create CHAR column with size greater than 254
> ----------------------------------------------------
>
> Key: DERBY-52
> URL: https://issues.apache.org/jira/browse/DERBY-52
> Project: Derby
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 10.0.2.0
> Environment: Dell Dimension 2350, 2GHz P4, 1 Gig RAM,
> Window XP Pro Version 2002, SP2
> JDK 1.4.2_03, build 1.4.2_03-b02
> Derby Snapshot SVN version 46005 (Binaries)
> Reporter: Jason Palmatier
>
> An attempt to create a table that contains a column of type CHAR with a size
> greater than 254 using the SQL statement
> CREATE TABLE dummyTable ( column1 char(255),column2 char(10),column3 char(10)
> )
> results in the following SQL Exception:
> SQL Exception: The length, precision, or scale attribute for column, or type
> mapping 'CHAR(255)' is not valid.
> SQL Error: 30000
> SQL State: 42611
> However, if you decrease column1's length by one as below, the table is
> created successfully:
> CREATE TABLE dummyTable ( column1 char(254),column2 char(10),column3 char(10)
> )
> The Derby Reference Manual states that the limit on the length of a CHAR data
> type is java.lang.Integer.MAX_VALUE:
> http://incubator.apache.org/derby/manuals/reference/sqlj128.html#HDRSII-SQLJ-13733
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