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Samebug tips

  1. ,

    Check whether privilege has the "not null" restriction. If so it always has to have a value and can never be null.

    A different reason could be a wrong implementation of a foreign key. Check whether you always correctly insert/update in both tables.

  2. ,

    Nothing is wrong with the database. When it gives you those errors, it's telling you that you are trying to input "nothing" (null) into a column that doesn't allow it. Fix it by removing the not null constraint or by passing a value to that field.

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com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'IdCanal' in field list is ambiguous  	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)	at java.lang.reflect.Constructor.newInstance(Unknown Source)	at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)	at com.mysql.jdbc.Util.getInstance(Util.java:381)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558)	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490)	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109)	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2643)	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2077)	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2228)	at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:92)	at org.openxava.tab.impl.JDBCTabProvider.nextBlock(JDBCTabProvider.java:235)	at org.openxava.tab.impl.JDBCTabProvider.nextChunk(JDBCTabProvider.java:258)	at org.openxava.tab.impl.EntityTabDataProvider.nextChunk(EntityTabDataProvider.java:35)	at org.openxava.tab.impl.EntityTab.nextChunk(EntityTab.java:298)	at org.openxava.tab.impl.TableModelBean.getRow(TableModelBean.java:120)	at org.openxava.tab.impl.TableModelBean.getValueAt(TableModelBean.java:171)	at org.openxava.tab.impl.XTableModelDecoratorBase.getValueAt(XTableModelDecoratorBase.java:63)	at org.openxava.tab.impl.HiddenXTableModel.getValueAt(HiddenXTableModel.java:70)	at org.openxava.tab.Tab.createTableModel(Tab.java:271)	at org.openxava.tab.Tab.getTableModel(Tab.java:250)