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https://issues.apache.org/jira/browse/DERBY-3825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12644928#action_12644928
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Ole Solberg commented on DERBY-3825:
------------------------------------
10.4 Tinderbox build
http://dbtg.thresher.com/derby/test/tinderbox_10.4_16/UpdateInfo/710076-buildDetails.txt
reports:
pptesting:
compile:
[mkdir] Created dir: Apache/TinderBox-10.4/10.4/classes.pptesting
[javac] Compiling 11 source files to
Apache/TinderBox-10.4/10.4/classes.pptesting
[javac]
Apache/TinderBox-10.4/10.4/java/testing/org/apache/derby/impl/jdbc/UTF8ReaderTest.java:57:
cannot find symbol
[javac] symbol : method setAutoCommit(boolean)
[javac] location: class org.apache.derby.impl.jdbc.UTF8ReaderTest
[javac] setAutoCommit(false);
[javac] ^
[javac]
Apache/TinderBox-10.4/10.4/java/testing/org/apache/derby/impl/jdbc/UTF8ReaderTest.java:88:
cannot find symbol
[javac] symbol : method setAutoCommit(boolean)
[javac] location: class org.apache.derby.impl.jdbc.UTF8ReaderTest
[javac] setAutoCommit(false);
[javac] ^
[javac]
Apache/TinderBox-10.4/10.4/java/testing/org/apache/derby/impl/jdbc/UTF8ReaderTest.java:126:
cannot find symbol
[javac] symbol : method setAutoCommit(boolean)
[javac] location: class org.apache.derby.impl.jdbc.UTF8ReaderTest
[javac] setAutoCommit(false);
[javac] ^
[javac] Note:
Apache/TinderBox-10.4/10.4/java/testing/org/apache/derby/impl/drda/TestProto.java
uses unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
[javac] 3 errors
BUILD FAILED
Apache/TinderBox-10.4/10.4/build.xml:457: The following error occurred while
executing this line:
Apache/TinderBox-10.4/10.4/java/testing/org/apache/derby/build.xml:44: Compile
failed; see the compiler error output for details.
Dittot on 10.4 branch build last night:
> StoreStreamClob.getReader(charPos) performs poorly
> --------------------------------------------------
>
> Key: DERBY-3825
> URL: https://issues.apache.org/jira/browse/DERBY-3825
> Project: Derby
> Issue Type: Bug
> Components: JDBC, Store
> Affects Versions: 10.5.0.0
> Reporter: Kristian Waagan
> Assignee: Kristian Waagan
> Fix For: 10.4.2.1, 10.5.0.0
>
> Attachments: derby-3825-0a-preview.diff,
> derby-3825-1a-reset_readpositioninbuffer.diff,
> derby-3825-2a-internalReader_repositioning.diff,
> derby-3825-2a-internalReader_repositioning.stat,
> derby-3825-2b-internalReader_repositioning.diff,
> derby-3825-3a-simplification.diff
>
>
> StoreStreamClob.getReader(charPos) performs poorly because it resets the
> underlying stream and skips data until it reached the requested character
> position. Not only does the data has to be skipped, it also has to be decoded
> (UTF-8).
> The problem is exposed through EmbedClob.getSubString, which causes extremely
> bad performance for the client driver because the locator based Clob
> implementation uses this method.
> For the record, there is another read buffer size issue that exaggerates the
> problem (it will probably be handled under DERBY-3769, and also DERBY-3818).
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