IV35864: DERBY TEST FAILS WITH CLASS CAST EXCEPTION

APAR status

• Closed as program error.

Error description

• Error Message: java.lang.ClassCastException:
  org.apache.derby.impl.sql.compile.ResultColumn incompatible with
  org.apache.derby.impl.sql.compile.ColumnReference
  .
  Stack Trace: at
  org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getTriggerA
  ctionString(Unknown Source)
   at
  org.apache.derby.impl.sql.compile.CreateTriggerNode.bindReferenc
  esClause(Unknown Source)
   at
  org.apache.derby.impl.sql.compile.CreateTriggerNode.bindStatemen
  t(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.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.Main.main(Unknown Source)
   at org.apache.derby.tools.ij.main(Unknown Source)
  .
  JLTF test fails.
  

Local fix

Problem summary

• The issue was with conversion of Class.isInstance to instanceof
  and the new code to avoid instanceof bound check. Namely, in the
  conversion mentioned above the class is not constant at runtime
  so we use class depth of -1 in the evaluator function. This -1
  was tested against the minimum size for which we can skip the
  instanceof boundcheck. Since -1 is less than 0 the test assumed
  it can skip the superclass test.
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR4
  .
  The fix was to detect this special non-constant class case and
  always do the super class bound check.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R260 PSY

     UP