Common exception (error code 23*) are no longer written to the .trace.db file by default.

h2/src/main/org/h2/message/Trace.java

@@ -150,6 +150,16 @@ public class Trace {
         traceWriter.write(TraceSystem.INFO, module, s, null);
     }
 
+    /**
+     * Write a message with trace level INFO to the trace system.
+     * 
+     * @param s the message
+     * @param t the exception
+     */
+    public void info(String s, Throwable t) {
+        traceWriter.write(TraceSystem.INFO, module, s, t);
+    }
+
     /**
      * Write Java source code with trace level DEBUG to the trace system.
      * 

h2/src/main/org/h2/message/TraceObject.java

@@ -390,7 +390,13 @@ public class TraceObject {
             TraceSystem.traceThrowable(e);
         } else {
             if (e instanceof SQLException) {
-                trace.error("SQLException", e);
+                SQLException e2 = (SQLException) e;
+                int errorCode = e2.getErrorCode(); 
+                if (errorCode >= 23000 && errorCode < 24000) {
+                    trace.info("SQLException", e);
+                } else {
+                    trace.error("SQLException", e);
+                }
                 return (SQLException) e;
             }
             trace.error("Uncaught Exception", e);