FIX: Fixed SQL errors.

src/main/java/org/caosdb/server/query/POV.java

@@ -23,6 +23,7 @@
 package org.caosdb.server.query;
 
 import static java.sql.Types.DOUBLE;
+import static java.sql.Types.INTEGER;
 import static java.sql.Types.VARCHAR;
 import static org.caosdb.server.database.DatabaseUtils.bytes2UTF8;
 
@@ -280,6 +281,9 @@ public class POV implements EntityFilterInterface {
           callPOV.setInt(7, vIntSubst);
           callPOV.setDouble(8, this.vDouble);
         }
+      } else {
+        callPOV.setNull(7, INTEGER);
+        callPOV.setNull(8, DOUBLE);
       }
       if (this.unit != null) {
         final long unitSig = this.unit.getSignature();