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https://issues.apache.org/jira/browse/DERBY-7134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17503122#comment-17503122
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Thomas Lußnig commented on DERBY-7134:
--------------------------------------
CREATE TABLE HUND (
id INTEGER GENERATED ALWAYS AS IDENTITY(Start with 1,
Increment by 1),
name VARCHAR(100) NOT NULL,
wurfdatum DATE NOT NULL,
zwinger VARCHAR(100),
zbn VARCHAR(100) NOT NULL,
CONSTRAINT PK_HUND PRIMARY KEY (id),
constraint uk_hund unique (name)
);
> MERGE not Working over Nework
> -----------------------------
>
> Key: DERBY-7134
> URL: https://issues.apache.org/jira/browse/DERBY-7134
> Project: Derby
> Issue Type: Bug
> Components: Network Client
> Affects Versions: 10.15.2.0
> Environment: Windows , Derby
> Reporter: Thomas Lußnig
> Priority: Major
>
> I Receive an error after sending Merge Statement via Netowrk to derby network
> server.
> The error was first mentioned 5 Years ago:
> *
> [https://stackoverflow.com/questions/41587515/derby-merge-statement-results-in-insufficient-data-while-reading-from-the-netwo]
> And is till now active in derby.
> SQL-Fehler: Unzureichende Daten beim Lesen aus dem Netz. Erwartet wurden
> mindestens 21.272 Byte, empfangen wurden jedoch nur 0 Byte. Die Verbindung
> wurde beendet.
> MERGE INTO HUND USING SYSIBM.SYSDUMMY1 ON HUND.name='name'
> WHEN MATCHED THEN UPDATE SET zwinger='ZW',zbn='zb'
> WHEN NOT MATCHED THEN INSERT (name,zwinger,zbn)VALUES('a','zw','zb')
> ;
> Tue Mar 08 07:23:32 CET 2022 : Cannot invoke "String.length()" because
> "<parameter1>" is null
> java.lang.NullPointerException: Cannot invoke "String.length()" because
> "<parameter1>" is null
> at
> org.apache.derby.impl.drda.DDMWriter.maxEncodedLength(DDMWriter.java:1138)
> at org.apache.derby.impl.drda.DDMWriter.writeString(DDMWriter.java:1252)
> at
> org.apache.derby.impl.drda.DRDAConnThread.writeSQLCAGRP(DRDAConnThread.java:6338)
> at
> org.apache.derby.impl.drda.DRDAConnThread.writeSQLCARD(DRDAConnThread.java:6167)
> at
> org.apache.derby.impl.drda.DRDAConnThread.writeSQLCARDs(DRDAConnThread.java:6109)
> at
> org.apache.derby.impl.drda.DRDAConnThread.processCommands(DRDAConnThread.java:836)
> at org.apache.derby.impl.drda.DRDAConnThread.run(DRDAConnThread.java:300)
>
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