Return-Path: Delivered-To: apmail-db-derby-dev-archive@www.apache.org Received: (qmail 80889 invoked from network); 9 May 2006 11:27:06 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (209.237.227.199) by minotaur.apache.org with SMTP; 9 May 2006 11:27:06 -0000 Received: (qmail 8863 invoked by uid 500); 9 May 2006 11:27:05 -0000 Delivered-To: apmail-db-derby-dev-archive@db.apache.org Received: (qmail 8828 invoked by uid 500); 9 May 2006 11:27:04 -0000 Mailing-List: contact derby-dev-help@db.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: Delivered-To: mailing list derby-dev@db.apache.org Received: (qmail 8819 invoked by uid 99); 9 May 2006 11:27:04 -0000 Received: from asf.osuosl.org (HELO asf.osuosl.org) (140.211.166.49) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 09 May 2006 04:27:04 -0700 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests= X-Spam-Check-By: apache.org Received: from [209.237.227.198] (HELO brutus.apache.org) (209.237.227.198) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 09 May 2006 04:27:03 -0700 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id AA95C7142D2 for ; Tue, 9 May 2006 11:26:21 +0000 (GMT) Message-ID: <32798771.1147173981696.JavaMail.jira@brutus> Date: Tue, 9 May 2006 11:26:21 +0000 (GMT+00:00) From: "Bernt M. Johnsen (JIRA)" To: derby-dev@db.apache.org Subject: [jira] Commented: (DERBY-1261) Two triggers on same table cause "ERROR 54038: Maximum depth of nested triggers was exceeded." In-Reply-To: <20087424.1146135517595.JavaMail.jira@brutus> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Virus-Checked: Checked by ClamAV on apache.org X-Spam-Rating: minotaur.apache.org 1.6.2 0/1000/N [ http://issues.apache.org/jira/browse/DERBY-1261?page=3Dcomments#actio= n_12378605 ]=20 Bernt M. Johnsen commented on DERBY-1261: ----------------------------------------- I have tried to unsetsand the significance of section 4.38 w.r.t. the above example, but I am not sure what to think yet..... Another interesting (and simpler) example seem to be a bit easier to uderstand, and might shed some light on the problem: create table tab(i integer primary key, j integer); insert into tab values (1, null); insert into tab values (2, null); create trigger t1 after update=20 on tab=20 referencing old as old for each row=20 mode db2sql=20 update tab set j=3D1 where i =3D old.i; create trigger t2 after update=20 on tab=20 referencing old as old for each row=20 mode db2sql=20 update tab set j=3D2 where i =3D old.i; update tab set j=3D3; The way I interpret section 4.38, this should not cause a recursion. The update sentence will cause both t1 and t2 to be executed in that order and the set of rows/columns changed is the same, so trigger t1 should be executed only once. Disclaimer: Try to understand section 4.28 yourself...... ;-) > Two triggers on same table cause "ERROR 54038: Maximum depth of nested tr= iggers was exceeded." > -------------------------------------------------------------------------= --------------------- > > Key: DERBY-1261 > URL: http://issues.apache.org/jira/browse/DERBY-1261 > Project: Derby > Type: Bug > Components: SQL > Versions: 10.0.2.0 > Environment: Embedded on Solaris x86 > Reporter: =C3=98ystein Gr=C3=B8vlen > > Two triggers on same table may lead to self-recursion: > ij> create table t3(i integer primary key, j integer, t timestamp); > 0 rows inserted/updated/deleted > ij> create trigger tr3i after insert on t3 referencing new as new for eac= h row mode db2sql update t3 set t =3D current_timestamp where i =3D new.i; > 0 rows inserted/updated/deleted > ij> insert into t3 values (1, 1, NULL); > 1 row inserted/updated/deleted > ij> create trigger tr3u after update on t3 referencing old as old for eac= h row mode db2sql update t3 set t =3D current_timestamp where i =3D old.i; > 0 rows inserted/updated/deleted > ij> insert into t3 values (2, 1, NULL); > ERROR 54038: Maximum depth of nested triggers was exceeded. > ij> update t3 set j=3Dj+1; > 1 row inserted/updated/deleted > ij> create trigger tr3u2 after update on t3 referencing old as old for ea= ch row mode db2sql update t3 set j =3D 0 where i =3D old.i and j > 2; > 0 rows inserted/updated/deleted > ij> update t3 set j=3Dj+1; > ERROR 54038: Maximum depth of nested triggers was exceeded. > From derby.log: > 2006-04-27 10:03:54.792 GMT Thread[main,5,main] (XID =3D 1274), (SESSIONI= D =3D 0), (DATABASE =3D testDB), (DRDAID =3D null), Cleanup action starting > 2006-04-27 10:03:54.792 GMT Thread[main,5,main] (XID =3D 1274), (SESSIONI= D =3D 0), (DATABASE =3D testDB), (DRDAID =3D null), Failed Statement is: in= sert into t3 values (2, 1, NULL) > ERROR 54038: Maximum depth of nested triggers was exceeded. > =09at org.apache.derby.iapi.error.StandardException.newException(Standard= Exception.java:301) > =09at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.pus= hTriggerExecutionContext(GenericLanguageConnectionContext.java:2104) > =09at org.apache.derby.impl.sql.execute.InternalTriggerExecutionContext.<= init>(InternalTriggerExecutionContext.java:179) > =09at org.apache.derby.impl.sql.execute.GenericExecutionFactory.getTrigge= rExecutionContext(GenericExecutionFactory.java:302) > =09at org.apache.derby.impl.sql.execute.TriggerEventActivator.(Trig= gerEventActivator.java:105) > =09at org.apache.derby.impl.sql.execute.UpdateResultSet.fireBeforeTrigger= s(UpdateResultSet.java:798) > =09at org.apache.derby.impl.sql.execute.UpdateResultSet.open(UpdateResult= Set.java:283) > =09at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericP= reparedStatement.java:361) > =09at org.apache.derby.impl.sql.execute.GenericTriggerExecutor.executeSPS= (GenericTriggerExecutor.java:169) > =09at org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(Ro= wTriggerExecutor.java:110) > =09at org.apache.derby.impl.sql.execute.TriggerEventActivator.notifyEvent= (TriggerEventActivator.java:277) > =09at org.apache.derby.impl.sql.execute.InsertResultSet.normalInsertCore(= InsertResultSet.java:1134) > =09at org.apache.derby.impl.sql.execute.InsertResultSet.open(InsertResult= Set.java:522) > =09at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericP= reparedStatement.java:361) > =09at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedSta= tement.java:1161) > =09at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.ja= va:567) > =09at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.ja= va:497) > =09at org.apache.derby.impl.tools.ij.ij.executeImmediate(ij.java:313) > =09at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java:433) > =09at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:310) > =09at org.apache.derby.impl.tools.ij.Main.go(Main.java:203) > =09at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:169) > =09at org.apache.derby.impl.tools.ij.Main14.main(Main14.java:55) > =09at org.apache.derby.tools.ij.main(ij.java:60) > Cleanup action completed > 2006-04-27 10:06:18.589 GMT Thread[main,5,main] (XID =3D 1293), (SESSIONI= D =3D 0), (DATABASE =3D testDB), (DRDAID =3D null), Cleanup action starting > 2006-04-27 10:06:18.589 GMT Thread[main,5,main] (XID =3D 1293), (SESSIONI= D =3D 0), (DATABASE =3D testDB), (DRDAID =3D null), Failed Statement is: up= date t3 set j=3Dj+1 > ERROR 54038: Maximum depth of nested triggers was exceeded. > =09at org.apache.derby.iapi.error.StandardException.newException(Standard= Exception.java:301) > =09at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.pus= hTriggerExecutionContext(GenericLanguageConnectionContext.java:2104) > =09at org.apache.derby.impl.sql.execute.InternalTriggerExecutionContext.<= init>(InternalTriggerExecutionContext.java:179) > =09at org.apache.derby.impl.sql.execute.GenericExecutionFactory.getTrigge= rExecutionContext(GenericExecutionFactory.java:302) > =09at org.apache.derby.impl.sql.execute.TriggerEventActivator.(Trig= gerEventActivator.java:105) > =09at org.apache.derby.impl.sql.execute.UpdateResultSet.fireBeforeTrigger= s(UpdateResultSet.java:798) > =09at org.apache.derby.impl.sql.execute.UpdateResultSet.open(UpdateResult= Set.java:283) > =09at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericP= reparedStatement.java:361) > =09at org.apache.derby.impl.sql.execute.GenericTriggerExecutor.executeSPS= (GenericTriggerExecutor.java:169) > =09at org.apache.derby.impl.sql.execute.RowTriggerExecutor.fireTrigger(Ro= wTriggerExecutor.java:110) > =09at org.apache.derby.impl.sql.execute.TriggerEventActivator.notifyEvent= (TriggerEventActivator.java:277) > =09at org.apache.derby.impl.sql.execute.UpdateResultSet.fireAfterTriggers= (UpdateResultSet.java:825) > =09at org.apache.derby.impl.sql.execute.UpdateResultSet.open(UpdateResult= Set.java:288) > =09at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericP= reparedStatement.java:361) > =09at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedSta= tement.java:1161) > =09at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.ja= va:567) > =09at org.apache.derby.impl.jdbc.EmbedStatement.execute(EmbedStatement.ja= va:497) > =09at org.apache.derby.impl.tools.ij.ij.executeImmediate(ij.java:313) > =09at org.apache.derby.impl.tools.ij.utilMain.doCatch(utilMain.java:433) > =09at org.apache.derby.impl.tools.ij.utilMain.go(utilMain.java:310) > =09at org.apache.derby.impl.tools.ij.Main.go(Main.java:203) > =09at org.apache.derby.impl.tools.ij.Main.mainCore(Main.java:169) > =09at org.apache.derby.impl.tools.ij.Main14.main(Main14.java:55) > =09at org.apache.derby.tools.ij.main(ij.java:60) > Cleanup action completed --=20 This message is 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