Hi guys, I hope someone can help me with that. I use JBOSS 4.0.4GA.I have two Entities which have an 1:N RelationShip. In my ejbPostCreate I set the CMR fields. public void ejbPostCreate(Integer rank, LocalAdMaterial adMaterial, LocalAdLoc adLoc, LocalAdActionType adActionType) throws CreateException { setAdMaterial(adMaterial); setAdActionType(adActionType); setAdLoc(adLoc); } In the SQL-Logs I recognized that before each set-method the container does a select on the table to which the CMR-Field link to. 2006-08-16 17:21:45,081 DEBUG [org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.AdMaterial] Executing SQL: SELECT ID, NAME, STATUS, ISO_CODE, DESCRIPTION, AD_FORMAT, AD_CAMPAIGN FROM AD_MATERIAL WHERE (ID=?) 2006-08-16 17:21:45,097 DEBUG [org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.AdActionType] Executing SQL: SELECT NAME FROM AD_ACTION_TYPE WHERE (ID=?) 2006-08-16 17:21:45,112 DEBUG [org.jboss.ejb.plugins.cmp.jdbc.JDBCLoadEntityCommand.AdLoc] Executing SQL: SELECT ID, ERLAUBT_TYP, AVG_TCP, AD_PARTNER, AD_CHANEL, AD_WEBSITE, AD_FORMAT FROM AD_LOC WHERE (ID=?) 2006-08-16 17:21:45,128 DEBUG [org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreEntityCommand.AdActionTracking] Executing SQL: UPDATE AD_ACTION_TRACKING SET AD_LOC=?, AD_MATERIAL=?, AD_ACTION_TYPE=? WHERE ID=? I do not know why these SELECT statements are executed. Is this a normal behaviour? Can please someone help me to avoid these useless SQLs. Thanks and regards, Sebastian