db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4874) Trigger does not recognize new size of VARCHAR column expanded with ALTER TABLE. It fails with ERROR 22001: A truncation error was encountered trying to shrink VARCHAR
Date Thu, 09 Dec 2010 19:22:09 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12969883#action_12969883
] 

Mamta A. Satoor commented on DERBY-4874:
----------------------------------------

I have committed the changes into trunk(10.8.0.0) with revision 1044096. The changes has comments
and test for the code changes. Please let me know if anyone has any comments on the changes.

The commit comments are as follows

DERBY-4874 Trigger does not recognize new size of VARCHAR column expanded with ALTER TABLE.
It fails with ERROR 22001: A truncation error was encountered trying to shrink VARCHAR

The trigger action associated with a trigger gets converted as shown in the example below.
This transformation happens if the trigger action has REFERENCEs clause.
	update xr.repositoryobjectversion set uname = upper( n.name )
	  where name = n.name and uname <> upper( n.name );
	turns into
	update xr.repositoryobjectversion set uname = 
	  upper( CAST (org.apache.derby.iapi.db.Factory::getTriggerExecutionContext().getNewRow().getObject(3)
AS VARCHAR(128)) ) 
	  where name = CAST (org.apache.derby.iapi.db.Factory::getTriggerExecutionContext().getNewRow().getObject(3)
AS VARCHAR(128))
As can be seen above, there is a CASTing involved which uses the length of the column in trigger
table. 

If say that length is changed by ALTER TABLE after the trigger has been created, that change
in the length does not get reflected in the sql associated with the trigger action in the
form on SPSDescriptor. In order to fix this, I have made changes which willcause us to regenerate
the sql from the trigger action for the SPSDescriptor if we are working with an invalidated
row level trigger which uses the REFERENCEs clause.


> Trigger does not recognize new size of VARCHAR column  expanded with ALTER TABLE. It
fails with ERROR 22001: A truncation error was encountered trying to shrink VARCHAR 
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4874
>                 URL: https://issues.apache.org/jira/browse/DERBY-4874
>             Project: Derby
>          Issue Type: Bug
>    Affects Versions: 10.2.2.1, 10.3.3.1, 10.4.2.1, 10.5.3.0, 10.6.2.1, 10.7.1.1
>            Reporter: Kathey Marsden
>            Assignee: Mamta A. Satoor
>             Fix For: 10.8.0.0
>
>         Attachments: DERBY4874_comments_and_test_missing_diff_ver3.txt, DERBY4874_comments_and_test_missing_stat_ver3.txt,
DERBY4874_not_ready_for_commit_diff.txt, DERBY4874_not_ready_for_commit_diff_ver2.txt, DERBY4874_not_ready_for_commit_stat.txt,
DERBY4874_not_ready_for_commit_stat_ver2.txt, trigAlterColumn.sql
>
>
> Trigger created before VARCHAR column is expanded with ALTER TABLE does not recognize
new size and fails with:
> ERROR 22001: A truncation error was encountered trying to shrink VARCHAR '012345
> 678901234567890123456789001234567890' to length 30.
> CREATE TABLE tab (
>        element_id         INTEGER NOT NULL,
>        altered_id         VARCHAR(30) NOT NULL,
>        counter            SMALLINT NOT NULL DEFAULT 0,
>        timets            TIMESTAMP NOT NULL
> );
> 0 rows inserted/updated/deleted
> ij> -- Create a trigger against the table
> CREATE TRIGGER mytrig
>  AFTER UPDATE ON tab
>  REFERENCING NEW AS newt OLD AS oldt
>  FOR EACH ROW MODE DB2SQL
>   UPDATE tab set tab.counter = CASE WHEN (oldt.counter < 32767) THEN (oldt.count
> er + 1) ELSE 1 END
>   WHERE ((newt.counter is null) or (oldt.counter = newt.counter))
>   AND newt.element_id = tab.element_id
>   AND newt.altered_id = tab.altered_id;
> 0 rows inserted/updated/deleted
> ij> -- Alter the table to increase column
> ALTER TABLE tab ALTER altered_id SET DATA TYPE VARCHAR(64);
> 0 rows inserted/updated/deleted
> ij> -- insert the data
> insert into tab values (99, '012345678901234567890123456789001234567890',1,CURRE
> NT_TIMESTAMP);
> 1 row inserted/updated/deleted
> ij> -- update and reproduce the issue
> update tab set timets = CURRENT_TIMESTAMP where ELEMENT_ID = 99;
> ERROR 22001: A truncation error was encountered trying to shrink VARCHAR '012345
> 678901234567890123456789001234567890' to length 30.
> java.sql.SQLDataException: A truncation error was encountered trying to shrink V
> ARCHAR '012345678901234567890123456789001234567890' to length 30.
>         at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLE
> xceptionFactory40.java:79)
>         at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Util.java:256)
>         at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException
> (TransactionResourceImpl.java:391)
>         at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Tr
> ansactionResourceImpl.java:346)
>         at org.apache.derby.impl.jdbc.EmbedConnection.handleException(EmbedConne
> ction.java:2269)
>         at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Connection
> Child.java:81)
>         at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedState
> ment.java:1321)
>         at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java
> :625)
>         at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.java
> :555)
>         at org.apache.derby.impl.tools.ij.ij.executeImmediate(ij.java:367)
>         at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java:521)
>         at org.apache.derby.impl.tools.ij.utilMain.runScriptGuts(utilMain.java:3
> 63)
>         at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:261)
>         at org.apache.derby.impl.tools.ij.Main.go(Main.java:229)
>         at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:184)
>         at org.apache.derby.impl.tools.ij.Main.main(Main.java:75)
>         at org.apache.derby.tools.ij.main(ij.java:59)
> Caused by: java.sql.SQLException: A truncation error was encountered trying to s
> hrink VARCHAR '012345678901234567890123456789001234567890' to length 30.
>         at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(SQLExc
> eptionFactory.java:45)
>         at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransport
> AcrossDRDA(SQLExceptionFactory40.java:119)
>         at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(SQLE
> xceptionFactory40.java:70)
>         ... 16 more
> Caused by: ERROR 22001: A truncation error was encountered trying to shrink VARC
> HAR '012345678901234567890123456789001234567890' to length 30.
>         at org.apache.derby.iapi.error.StandardException.newException(StandardEx
> ception.java:343)
>         at org.apache.derby.iapi.types.SQLChar.hasNonBlankChars(SQLChar.java:176
> 6)
>         at org.apache.derby.iapi.types.SQLChar.setWidth(SQLChar.java:1840)
>         at org.apache.derby.exe.ac0b5b0099x012bxf542xab11x0000001bd2983.e2(Unkno
> wn Source)
>         at org.apache.derby.impl.services.reflect.DirectCall.invoke(ReflectGener
> atedClass.java:143)
>         at org.apache.derby.impl.sql.execute.GenericQualifier.getOrderable(Gener
> icQualifier.java:96)
>         at org.apache.derby.impl.sql.execute.NoPutResultSetImpl.clearOrderableCa
> che(NoPutResultSetImpl.java:313)
>         at org.apache.derby.impl.sql.execute.TableScanResultSet.openScanControll
> er(TableScanResultSet.java:350)
>         at org.apache.derby.impl.sql.execute.TableScanResultSet.openCore(TableSc
> anResultSet.java:262)
>         at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.openCore(P
> rojectRestrictResultSet.java:174)
>         at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.openCore(P
> rojectRestrictResultSet.java:174)
>         at org.apache.derby.impl.sql.execute.NormalizeResultSet.openCore(Normali
> zeResultSet.java:146)
>         at org.apache.derby.impl.sql.execute.UpdateResultSet.setup(UpdateResultS
> et.java:344)
>         at org.apache.derby.impl.sql.execute.UpdateResultSet.open(UpdateResultSe
> t.java:263)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Generi
> cPreparedStatement.java:436)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.executeSubStatemen
> t(GenericPreparedStatement.java:306)
>         at org.apache.derby.impl.sql.execute.GenericTriggerExecutor.executeSPS(G
> enericTriggerExecutor.java:173)
>         at org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(RowT
> riggerExecutor.java:111)
>         at org.apache.derby.impl.sql.execute.TriggerEventActivator.notifyEvent(T
> riggerEventActivator.java:278)
>         at org.apache.derby.impl.sql.execute.UpdateResultSet.fireAfterTriggers(U
> pdateResultSet.java:817)
>         at org.apache.derby.impl.sql.execute.UpdateResultSet.open(UpdateResultSe
> t.java:280)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Generi
> cPreparedStatement.java:436)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPre
> paredStatement.java:317)
>         at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedState
> ment.java:1232)
>         ... 10 more
> ij>

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message