1 files changed, 27 insertions, 5 deletions

diff --git a/plugins/org.eclipse.net4j.db/src/org/eclipse/net4j/internal/db/ddl/delta/DBFieldDelta.java b/plugins/org.eclipse.net4j.db/src/org/eclipse/net4j/internal/db/ddl/delta/DBFieldDelta.java
index 3cff743278..53cd451df4 100644
--- a/plugins/org.eclipse.net4j.db/src/org/eclipse/net4j/internal/db/ddl/delta/DBFieldDelta.java
+++ b/plugins/org.eclipse.net4j.db/src/org/eclipse/net4j/internal/db/ddl/delta/DBFieldDelta.java
@@ -12,7 +12,10 @@ package org.eclipse.net4j.internal.db.ddl.delta;
 
 import org.eclipse.net4j.db.DBType;
 import org.eclipse.net4j.db.ddl.IDBField;
+import org.eclipse.net4j.db.ddl.IDBSchema;
+import org.eclipse.net4j.db.ddl.IDBTable;
 import org.eclipse.net4j.db.ddl.delta.IDBDelta;
+import org.eclipse.net4j.db.ddl.delta.IDBDeltaVisitor;
 import org.eclipse.net4j.db.ddl.delta.IDBFieldDelta;
 import org.eclipse.net4j.db.ddl.delta.IDBPropertyDelta;
 import org.eclipse.net4j.util.ObjectUtil;
@@ -37,35 +40,38 @@ public final class DBFieldDelta extends DBTableElementDelta implements IDBFieldD
     DBType oldType = oldField == null ? null : oldField.getType();
     if (!ObjectUtil.equals(type, oldType))
     {
-      addPropertyDelta(new DBPropertyDelta<DBType>("type", IDBPropertyDelta.Type.STRING, type, oldType));
+      addPropertyDelta(new DBPropertyDelta<DBType>(TYPE_PROPERTY, IDBPropertyDelta.Type.STRING, type, oldType));
     }
 
     Integer precision = field == null ? null : field.getPrecision();
     Integer oldPrecision = oldField == null ? null : oldField.getPrecision();
     if (!ObjectUtil.equals(precision, oldPrecision))
     {
-      addPropertyDelta(new DBPropertyDelta<Integer>("precision", IDBPropertyDelta.Type.INTEGER, precision, oldPrecision));
+      addPropertyDelta(new DBPropertyDelta<Integer>(PRECISION_PROPERTY, IDBPropertyDelta.Type.INTEGER, precision,
+          oldPrecision));
     }
 
     Integer scale = field == null ? null : field.getScale();
     Integer oldScale = oldField == null ? null : oldField.getScale();
     if (!ObjectUtil.equals(scale, oldScale))
     {
-      addPropertyDelta(new DBPropertyDelta<Integer>("scale", IDBPropertyDelta.Type.INTEGER, scale, oldScale));
+      addPropertyDelta(new DBPropertyDelta<Integer>(SCALE_PROPERTY, IDBPropertyDelta.Type.INTEGER, scale, oldScale));
     }
 
     Boolean notNull = field == null ? null : field.isNotNull();
     Boolean oldNotNull = oldField == null ? null : oldField.isNotNull();
     if (!ObjectUtil.equals(notNull, oldNotNull))
     {
-      addPropertyDelta(new DBPropertyDelta<Boolean>("notNull", IDBPropertyDelta.Type.BOOLEAN, notNull, oldNotNull));
+      addPropertyDelta(new DBPropertyDelta<Boolean>(NOT_NULL_PROPERTY, IDBPropertyDelta.Type.BOOLEAN, notNull,
+          oldNotNull));
     }
 
     Integer position = oldField == null ? null : field.getPosition();
     Integer oldPosition = oldField == null ? null : oldField.getPosition();
     if (!ObjectUtil.equals(position, oldPosition))
     {
-      addPropertyDelta(new DBPropertyDelta<Integer>("position", IDBPropertyDelta.Type.INTEGER, position, oldPosition));
+      addPropertyDelta(new DBPropertyDelta<Integer>(POSITION_PROPERTY, IDBPropertyDelta.Type.INTEGER, position,
+          oldPosition));
     }
   }
 
@@ -80,4 +86,20 @@ public final class DBFieldDelta extends DBTableElementDelta implements IDBFieldD
   {
     return Type.FIELD;
   }
+
+  public void accept(IDBDeltaVisitor visitor)
+  {
+    visitor.visit(this);
+  }
+
+  public IDBField getElement(IDBSchema schema)
+  {
+    IDBTable table = getParent().getElement(schema);
+    if (table == null)
+    {
+      return null;
+    }
+
+    return table.getField(getName());
+  }
 }