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https://issues.apache.org/jira/browse/DERBY-2935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-2935:
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Attachment: decode-long.diff
The attached patch fixes the decoding by forcing promotion of the operands to
long. The regression tests ran cleanly.
> DDMReader.readLengthAndCodePoint() decodes long integer incorrectly
> -------------------------------------------------------------------
>
> Key: DERBY-2935
> URL: https://issues.apache.org/jira/browse/DERBY-2935
> Project: Derby
> Issue Type: Bug
> Components: Network Server
> Affects Versions: 10.1.3.1, 10.2.2.0, 10.3.1.1, 10.4.0.0
> Reporter: Knut Anders Hatlen
> Priority: Minor
> Attachments: decode-long.diff
>
>
> DDMReader.readLengthAndCodePoint() contains code to decode a long integer
> from a byte array. This code is broken since it uses int operations and not
> long operations in the decoding. The long might be encoded using four, six or
> eight bytes, and since Derby currently always uses the four bytes encoding,
> the bug is not exposed in the current code.
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