[#DERBY-3970] PositionedStoreStream doesn't initialize itself properly

Derby

PositionedStoreStream doesn't initialize itself properly

Created: 02/Dec/08 10:06 PM Updated: 04/May/09 06:22 PM

Component/s:

JDBC

Affects Version/s:

10.3.3.0, 10.4.2.0, 10.5.1.1

Fix Version/s:

10.4.2.1, 10.5.1.1

Time Tracking:

Not Specified

File Attachments:

	File Name	Date Attached	Attached By	Size
	derby-3970-1a-PositionedStoreStream_init.diff.txt	2008-12-02 10:09 PM	Kristian Waagan	4 kB

Resolution Date:

08/Jan/09 11:27 AM

Description

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When a PositionedStoreStream is created on top of a stream from store, it must properly initialize itself.
Proper initialization consists of initializing and resetting the stream to make sure the states of the streams are in sync.

A case of out of sync stream states was detected in a test where the Clob reference wasn't kept, but a new Clob object was created for each operation, i.e:
rs.getClob(1).length();
rs.getClob(1).getSubString(...);

A symptom of out of sync stream states is EOFException on a valid request.
I don't think the access style above is supposed to work, but the proper initialization should be performed anyway.

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Comments

Work Log

Change History

Subversion Commits

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Repository	Revision	Date	User	Message
ASF	#722812	Wed Dec 03 08:54:12 UTC 2008	kristwaa	~~DERBY-3970~~: PositionedStoreStream doesn't initialize itself properly. Makes PositionedStoreStream initialize itself properly by calling initStream and resetStream on the underlying Resetable. Patch file: ~~DERBY-3970~~-1a-PositionedStoreStream_init.diff
				Files Changed
				MODIFY /db/derby/code/trunk/java/engine/org/apache/derby/impl/jdbc/StoreStreamClob.java MODIFY /db/derby/code/trunk/java/engine/org/apache/derby/impl/jdbc/PositionedStoreStream.java MODIFY /db/derby/code/trunk/java/engine/org/apache/derby/impl/jdbc/EmbedBlob.java

Repository	Revision	Date	User	Message
ASF	#725286	Wed Dec 10 14:02:30 UTC 2008	kristwaa	~~DERBY-3970~~: PositionedStoreStream doesn't initialize itself properly. Merged revision 722812 from trunk.
				Files Changed
				MODIFY /db/derby/code/branches/10.4/java/engine/org/apache/derby/impl/jdbc/StoreStreamClob.java MODIFY /db/derby/code/branches/10.4/java/engine/org/apache/derby/impl/jdbc/PositionedStoreStream.java MODIFY /db/derby/code/branches/10.4/java/engine/org/apache/derby/impl/jdbc/EmbedBlob.java