NullPointerException thrown when creating nested query
------------------------------------------------------
Key: DERBY-4780
URL: https://issues.apache.org/jira/browse/DERBY-4780
Project: Derby
Issue Type: Bug
Affects Versions: 10.6.1.0
Environment: Mac OS X 10.6.4, Java 1.6.0_20
Reporter: Scott Wilson
I'm writing a Java application that's working with Embedded Apache Derby via
JDBC. I'm having problems with the code in the following snippet:
byte md5[] = md5sum(file);
PreparedStatement s = con.prepareStatement("INSERT INTO input_files (job_ID,
hash) SELECT job_id, ? FROM job WHERE job_name = ?");
s.setBytes(1, md5);
s.setString(2, jobName);
s.executeUpdate();
s.close();
This inserts into the following tables:
CREATE TABLE input_files
(
hash char(16) for bit data,
job_id integer REFERENCES job,
PRIMARY KEY(job_id, hash)
);
CREATE TABLE job
(
job_id integer PRIMARY KEY GENERATED ALWAYS as IDENTITY,
job_name character varying(50) UNIQUE NOT NULL,
#other fields
);
The idea is that there is an internal integer `job_id` which is used internally
by the database, but we want to reference it as much as possible with the
human-readable String `job_name`
This consistently throws the following exception.
java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
at
org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
at
org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(UnknownSource)
at
org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown
Source)
at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at [line 3 of snippet above]
As you can see, this is thrown from the line where the prepared statement is
created - it doesn't get as far as executing it. I had assumed I was doing
something wrong, but a few people over at Stack Overflow (
http://stackoverflow.com/questions/3503710/derby-insert-select-null-pointer-exception
) reckon that this is a bug, at least in terms of what error is being
reported. For what it's worth, the exact same code works fine with PostgreSQL.
Derby.log:
----------------------------------------------------------------
2010-08-18 08:47:08.779 GMT:
Booting Derby version The Apache Software Foundation - Apache Derby - 10.6.1.0
- (938214): instance a816c00e-012a-8461-611c-0000046700d0
on database directory /path/to/myDatabase with class loader
sun.misc.launcher$appclassloa...@6d6f0472
Database Class Loader started - derby.database.classpath=''
2010-08-18 08:47:12.067 GMT Thread[SwingWorker-pool-1-thread-1,5,main] (XID =
316), (SESSIONID = 1), (DATABASE = myDatabase), (DRDAID = null), Cleanup action
starting
2010-08-18 08:47:12.067 GMT Thread[SwingWorker-pool-1-thread-1,5,main] (XID =
316), (SESSIONID = 1), (DATABASE = myDatabase), (DRDAID = null), Failed
Statement is: INSERT INTO input_files (job_id, hash) SELECT job_id, ? FROM job
WHERE job_name = ?
java.lang.NullPointerException
at org.apache.derby.impl.sql.compile.BitTypeCompiler.storable(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumnList.checkStorableExpressions(Unknown
Source)
at org.apache.derby.impl.sql.compile.InsertNode.bindStatement(Unknown
Source)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
at
org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown
Source)
at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at [line 3 of snippet]
Cleanup action completed
2010-08-18 08:47:12.084 GMT:
Shutting down instance a816c00e-012a-8461-611c-0000046700d0 with class loader
sun.misc.launcher$appclassloa...@6d6f0472
----------------------------------------------------------------
and unrolled exception:
java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
at
org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
at
org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown
Source)
at
org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown
Source)
at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at [line 3 of snippet above]
Caused by: java.sql.SQLException: Java exception: ':
java.lang.NullPointerException'.
at
org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
at
org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown
Source)
... 26 more
Caused by: java.lang.NullPointerException
at org.apache.derby.impl.sql.compile.BitTypeCompiler.storable(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumnList.checkStorableExpressions(Unknown
Source)
at org.apache.derby.impl.sql.compile.InsertNode.bindStatement(Unknown
Source)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
at
org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown
Source)
... 19 more
SQLState: XJ001
Error code: 0
Message: Java exception: ': java.lang.NullPointerException'.
Cause: java.sql.SQLException: Java exception: ':
java.lang.NullPointerException'.
at
org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
at
org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown
Source)
at
org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
at
org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown
Source)
at
org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown
Source)
at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at [line 3 of snippet above]
Caused by: java.lang.NullPointerException
at org.apache.derby.impl.sql.compile.BitTypeCompiler.storable(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumnList.checkStorableExpressions(Unknown
Source)
at org.apache.derby.impl.sql.compile.InsertNode.bindStatement(Unknown
Source)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
at
org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown
Source)
... 19 more
Cause: java.lang.NullPointerException
at org.apache.derby.impl.sql.compile.BitTypeCompiler.storable(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumn.checkStorableExpression(Unknown
Source)
at
org.apache.derby.impl.sql.compile.ResultColumnList.checkStorableExpressions(Unknown
Source)
at org.apache.derby.impl.sql.compile.InsertNode.bindStatement(Unknown
Source)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
at
org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown
Source)
at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown
Source)
at [line 3 of snippet above]
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