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https://issues.apache.org/jira/browse/DERBY-3253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12552607
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Bryan Pendleton commented on DERBY-3253:
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I think the _v3 patch is a good one; I like the approach of the patch. Thank you
for adding the comments, they are quite clear. I think that the manipulation
of the leftOperand field is well encapsulated with this approach.
I downloaded and reviewed the _v3 patch against the current trunk.
In my environment, the new regression test fails as expected without the
code changes from the patch, and passes with the code changes applied.
Thank you again for taking the time to explore the various alternatives
in detail, and for explaining how the processing works, it has been quite
illuminating and I've learned a lot from observing your work.
+1 to commit from me!
> NullPointer Exception (NPE) from query with IN predicate containing two
> values and joining a view with a large table. ERROR 38000: The exception
> 'java.lang.NullPointerException' was thrown while evaluating an expression.
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-3253
> URL: https://issues.apache.org/jira/browse/DERBY-3253
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.3.1.4, 10.4.0.0
> Reporter: Stan Bradbury
> Attachments: 3253ReproDB.zip, d3253_v1.patch,
> d3253_v2_incomplete.patch, d3253_v3.patch
>
>
> With a single value in the IN clause the query does not fail.
> > Run the following query in the attached database (v 10.3 db).
> SELECT A.TIMESTAMP, B.F_NAMEADDR, B.TOTAL_F,
> B.TOTAL_FS, B.TOTAL_FT, B.TOTAL_FX
> FROM TIME A, THE_VIEW B
> WHERE B.T_ID = A.T_ID AND B.F_NAMEADDR IN
> ('one.two.three.oscar','one.two.three.kathy')
> ORDER BY A.TIMESTAMP ASC;
> > result
> ERROR 38000: The exception 'java.lang.NullPointerException' was thrown while
> evaluating an expression.
> ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
> Stack trace:
> Failed Statement is: SELECT A.TIMESTAMP, B.F_NAMEADDR, B.TOTAL_F,
> B.TOTAL_FS, B.TOTAL_FT, B.TOTAL_FX
> FROM TIME A, THE_VIEW B
> WHERE B.T_ID = A.T_ID AND B.F_NAMEADDR IN
> ('one.two.three.oscar','one.two.three.kathy')
> ORDER BY A.TIMESTAMP ASC
> ERROR 38000: The exception 'java.lang.NullPointerException' was thrown while
> evaluating an expression.
> at org.apache.derby.iapi.error.StandardException.newException(Unknown
> Source)
> at
> org.apache.derby.iapi.error.StandardException.unexpectedUserException(Unknown
> Source)
> at org.apache.derby.impl.services.reflect.DirectCall.invoke(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.NestedLoopJoinResultSet.getNextRowCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.SortResultSet.getRowFromResultSet(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.SortResultSet.getNextRowFromRS(Unknown
> Source)
> at org.apache.derby.impl.sql.execute.SortResultSet.loadSorter(Unknown
> Source)
> at org.apache.derby.impl.sql.execute.SortResultSet.openCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.open(Unknown Source)
> at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> at org.apache.derby.impl.tools.ij.ij.executeImmediate(Unknown Source)
> at org.apache.derby.impl.tools.ij.utilMain.doCatch(Unknown Source)
> at org.apache.derby.impl.tools.ij.utilMain.runScriptGuts(Unknown Source)
> at org.apache.derby.impl.tools.ij.utilMain.go(Unknown Source)
> at org.apache.derby.impl.tools.ij.Main.go(Unknown Source)
> at org.apache.derby.impl.tools.ij.Main.mainCore(Unknown Source)
> at org.apache.derby.impl.tools.ij.Main14.main(Unknown Source)
> at org.apache.derby.tools.ij.main(Unknown Source)
> Caused by: java.lang.NullPointerException
> at
> org.apache.derby.exe.ac601a400fx0116xa813xc2f7x00000010a3602.e8(Unknown
> Source)
> ... 21 more
> ============= begin nested exception, level (1) ===========
> java.lang.NullPointerException
> at
> org.apache.derby.exe.ac601a400fx0116xa813xc2f7x00000010a3602.e8(Unknown
> Source)
> at org.apache.derby.impl.services.reflect.DirectCall.invoke(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.NestedLoopJoinResultSet.getNextRowCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.SortResultSet.getRowFromResultSet(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.SortResultSet.getNextRowFromRS(Unknown
> Source)
> at org.apache.derby.impl.sql.execute.SortResultSet.loadSorter(Unknown
> Source)
> at org.apache.derby.impl.sql.execute.SortResultSet.openCore(Unknown
> Source)
> at
> org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.open(Unknown Source)
> at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown
> Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> at org.apache.derby.impl.tools.ij.ij.executeImmediate(Unknown Source)
> at org.apache.derby.impl.tools.ij.utilMain.doCatch(Unknown Source)
> at org.apache.derby.impl.tools.ij.utilMain.runScriptGuts(Unknown Source)
> at org.apache.derby.impl.tools.ij.utilMain.go(Unknown Source)
> at org.apache.derby.impl.tools.ij.Main.go(Unknown Source)
> at org.apache.derby.impl.tools.ij.Main.mainCore(Unknown Source)
> at org.apache.derby.impl.tools.ij.Main14.main(Unknown Source)
> at org.apache.derby.tools.ij.main(Unknown Source)
> ============= end nested exception, level (1) ===========
> Schema info:
> CREATE TABLE TIME ("T_ID" BIGINT NOT NULL, "TIMESTAMP" TIMESTAMP NOT NULL,
> "DAY" INTEGER NOT NULL, "WEEK" INTEGER NOT NULL, "MONTH" INTEGER NOT NULL,
> "YEAR_COL" INTEGER NOT NULL);
> CREATE TABLE F ("F_ID" BIGINT NOT NULL, "T_ID" BIGINT NOT NULL, "F_NAMEADDR"
> VARCHAR(250) NOT NULL, "TOTAL_F" BIGINT NOT NULL, "TOTAL_FS" BIGINT NOT NULL,
> "TOTAL_FT" BIGINT NOT NULL, "TOTAL_FX" BIGINT NOT NULL);
> CREATE VIEW the_view AS SELECT T.T_ID AS T_ID , T.F_NAMEADDR AS
> F_NAMEADDR,
> T.TOTAL_F AS TOTAL_F, T.TOTAL_FS AS TOTAL_FS, T.TOTAL_FT AS TOTAL_FT ,
> T.TOTAL_FX AS TOTAL_FX
> FROM F AS T
> WHERE T.T_ID = (SELECT MAX(T_ID) FROM F);
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