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https://issues.apache.org/jira/browse/DERBY-3964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12669137#action_12669137
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Chip Hartney commented on DERBY-3964:
-------------------------------------
I cannot tell from this report which versions it occurs in nor which it is
fixed in.
I also need to know whether it could be the same as the error I am incurring in
both v10.3.3.0 and v10.4.2.0 (but not v10.3.2.1).
It is an error in which I incur a NullPointerException trying to delete a row
from a table with ON DELETE referential actions (though not a SET NULL action).
The error is exemplified by the following sequence in IJ:
ij> delete from app."LineItem" where "Id" = 60275;
ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
ij> select * from app."LineItem" where "Id" = 60275;
ERROR 08003: No current connection.
The LineItem table has the following constraints:
ALTER TABLE "APP"."LineItem" ADD CONSTRAINT "LineItem_FK_OrderId" FOREIGN KEY
("OrderId") REFERENCES "APP"."Order" ("Id") ON DELETE CASCADE ON UPDATE NO
ACTION;
ALTER TABLE "APP"."LineItem" ADD CONSTRAINT "LineItem_FK_ProductId" FOREIGN
KEY ("ProductId") REFERENCES "APP"."Product" ("Id") ON DELETE RESTRICT ON
UPDATE NO ACTION;
> NullPointerException when re-evaluating generated column during ON DELETE SET
> NULL referential action
> -----------------------------------------------------------------------------------------------------
>
> Key: DERBY-3964
> URL: https://issues.apache.org/jira/browse/DERBY-3964
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Reporter: Dag H. Wanvik
> Assignee: Rick Hillegas
> Attachments: derby-3964-01-aa-onDeleteSetNull.diff,
> RegenerateAfterOnDeleteSetNullError.java
>
>
> Cf repro RegenerateAfterOnDeleteSetNullError.java enclosed.
> 1)
> test_1(org.apache.derbyTesting.functionTests.tests.lang.RegenerateAfterOnDeleteSetNullError)java.sql.SQLException:
> The exception 'java.lang.NullPointerException' was thrown while evaluating
> an expression.
> at
> org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:95)
> at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:87)
> at org.apache.derby.impl.jdbc.Util.seeNextException(Util.java:223)
> at
> org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(TransactionResourceImpl.java:398)
> at
> org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(TransactionResourceImpl.java:346)
> at
> org.apache.derby.impl.jdbc.EmbedConnection.handleException(EmbedConnection.java:2201)
> at
> org.apache.derby.impl.jdbc.ConnectionChild.handleException(ConnectionChild.java:81)
> at
> org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1323)
> at
> org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:625)
> at
> org.apache.derby.impl.jdbc.EmbedStatement.executeUpdate(EmbedStatement.java:175)
> at
> org.apache.derbyTesting.functionTests.tests.lang.RegenerateAfterOnDeleteSetNullError.test_1(RegenerateAfterOnDeleteSetNullError.java:60)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at
> org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:105)
> at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
> at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
> at junit.extensions.TestSetup.run(TestSetup.java:25)
> at
> org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)
> Caused by: java.sql.SQLException: The exception
> 'java.lang.NullPointerException' was thrown while evaluating an expression.
> at
> org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(SQLExceptionFactory.java:45)
> at
> org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(SQLExceptionFactory40.java:119)
> at
> org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:70)
> ... 31 more
> Caused by: java.sql.SQLException: Java exception: ':
> java.lang.NullPointerException'.
> at
> org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(SQLExceptionFactory.java:45)
> at
> org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(SQLExceptionFactory40.java:119)
> at
> org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:70)
> at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:87)
> at org.apache.derby.impl.jdbc.Util.javaException(Util.java:244)
> at
> org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(TransactionResourceImpl.java:403)
> ... 29 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.derby.impl.sql.execute.BaseActivation.getColumnFromRow(BaseActivation.java:1451)
> at
> org.apache.derby.exe.ac30fbc0bbx011dxd4a8x4baexffffd28a99d54.e5(Unknown
> Source)
> at
> org.apache.derby.impl.services.reflect.DirectCall.invoke(ReflectGeneratedClass.java:149)
> at
> org.apache.derby.impl.sql.execute.NoRowsResultSetImpl.evaluateGenerationClauses(NoRowsResultSetImpl.java:623)
> at
> org.apache.derby.impl.sql.execute.UpdateResultSet.collectAffectedRows(UpdateResultSet.java:451)
> at
> org.apache.derby.impl.sql.execute.DeleteCascadeResultSet.collectAffectedRows(DeleteCascadeResultSet.java:195)
> at
> org.apache.derby.impl.sql.execute.DeleteCascadeResultSet.open(DeleteCascadeResultSet.java:120)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(GenericPreparedStatement.java:416)
> at
> org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:297)
> at
> org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1235)
> ... 24 more
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