[DERBY-4041] NullPointerException on query with misplaced DERBY-PROPERTIES clause

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 10.3.3.0, 10.4.2.0, 10.5.1.1
• Component/s: SQL
• Labels: derby_triage10_8
• Urgency: Low
• Assignee: Dimuthu Wickramanayake
• Reporter: Katherine Marsden
• Created: 31/Jan/09 00:05
• Updated: 15/Dec/21 20:42

Description

The following sql throws a NullPointerException
ij> CREATE TABLE "APP"."T1" ("I" INTEGER, "J" INTEGER);
0 rows inserted/updated/deleted
ij> insert into t1 values (1, 2), (2, 4), (3, 6), (4, 8), (5, 10);
5 rows inserted/updated/deleted
ij> CREATE TABLE "APP"."T2" ("I" INTEGER, "J" INTEGER);
0 rows inserted/updated/deleted
ij> insert into t2 values (1, 2), (2, -4), (3, 6), (4, -8), (5, 10);
5 rows inserted/updated/deleted
ij> CREATE TABLE "APP"."T3" ("A" INTEGER, "B" INTEGER);
0 rows inserted/updated/deleted
ij> insert into T3 values (1,1), (2,2), (3,3), (4,4), (6, 24),
(7, 28), (8, 32), (9, 36), (10, 40);
9 rows inserted/updated/deleted
ij> insert into t3 (a) values 11, 12, 13, 14, 15, 16, 17, 18, 19, 20;
10 rows inserted/updated/deleted
ij> update t3 set b = 2 * a where a > 10;
10 rows inserted/updated/deleted
ij> CREATE TABLE "APP"."T4" ("A" INTEGER, "B" INTEGER);
0 rows inserted/updated/deleted
ij> insert into t4 values (3, 12), (4, 16);
2 rows inserted/updated/deleted
ij> insert into t4 (a) values 11, 12, 13, 14, 15, 16, 17, 18, 19, 20;
10 rows inserted/updated/deleted
ij> update t4 set b = 2 * a where a > 10;
10 rows inserted/updated/deleted
ij> select count from (select * from t1 union select * from t3 --DERBY-PROPERTIES joinStrategy=HASH
) x1 (c, d), (select * from t2 union select * from t4) x2 (e, f) where x1.c = x2.e ;
ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
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.javaException(Util.java:244)
at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(TransactionResourceImpl.java:403)
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.execute(EmbedStatement.java:614)
at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:555)
at org.apache.derby.impl.tools.ij.ij.executeImmediate(ij.java:329)
at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java:505)
at org.apache.derby.impl.tools.ij.utilMain.runScriptGuts(utilMain.java:347)
at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:245)
at org.apache.derby.impl.tools.ij.Main.go(Main.java:210)
at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:177)
at org.apache.derby.impl.tools.ij.Main.main(Main.java:73)
at org.apache.derby.tools.ij.main(ij.java:59)
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:11
9)
at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLExceptionFactory40.java:70)
... 16 more
Caused by: java.lang.NullPointerException
at org.apache.derby.impl.sql.compile.OptimizerImpl.getFinalCost(OptimizerImpl.java:2498)
at org.apache.derby.impl.sql.compile.SelectNode.getFinalCostEstimate(SelectNode.java:1987)
at org.apache.derby.impl.sql.compile.UnionNode.getFinalCostEstimate(UnionNode.java:653)
at org.apache.derby.impl.sql.compile.SetOperatorNode.modifyAccessPath(SetOperatorNode.java:169)
at org.apache.derby.impl.sql.compile.ProjectRestrictNode.modifyAccessPath(ProjectRestrictNode.java:718)
at org.apache.derby.impl.sql.compile.OptimizerImpl.modifyAccessPaths(OptimizerImpl.java:2456)
at org.apache.derby.impl.sql.compile.SelectNode.modifyAccessPaths(SelectNode.java:1865)
at org.apache.derby.impl.sql.compile.DMLStatementNode.optimizeStatement(DMLStatementNode.java:307)
at org.apache.derby.impl.sql.compile.CursorNode.optimizeStatement(CursorNode.java:515)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(GenericStatement.java:367)
at org.apache.derby.impl.sql.GenericStatement.prepare(GenericStatement.java:88)
at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(GenericLanguageConne
ctionContext.java:802)
at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java:606)
... 9 more

I think the directive is misplaced and should come after the x1 (c, d) but it shouldn't throw an NPE