diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/Oracle8iDialect.java b/hibernate-core/src/main/java/org/hibernate/dialect/Oracle8iDialect.java
index 6f77273d91..5dcbc459dc 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/Oracle8iDialect.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/Oracle8iDialect.java
@@ -572,11 +572,6 @@ public int getInExpressionCountLimit() {
 		return PARAM_LIST_SIZE_LIMIT;
 	}
 	
-	@Override
-	public boolean supportsNotNullUnique() {
-		return false;
-	}
-	
 	@Override
 	public boolean forceLobAsLastValue() {
 		return true;
diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/Oracle9Dialect.java b/hibernate-core/src/main/java/org/hibernate/dialect/Oracle9Dialect.java
index 341c5681de..d0f0d8ce79 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/Oracle9Dialect.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/Oracle9Dialect.java
@@ -377,9 +377,4 @@ public boolean supportsExistsInSelect() {
 	public int getInExpressionCountLimit() {
 		return PARAM_LIST_SIZE_LIMIT;
 	}
-	
-	@Override
-	public boolean supportsNotNullUnique() {
-		return false;
-	}
 }
diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/SybaseDialect.java b/hibernate-core/src/main/java/org/hibernate/dialect/SybaseDialect.java
index 053c06e028..4064b2347a 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/SybaseDialect.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/SybaseDialect.java
@@ -26,7 +26,6 @@
 import java.sql.Types;
 
 import org.hibernate.type.descriptor.sql.BlobTypeDescriptor;
-import org.hibernate.type.descriptor.sql.LongVarbinaryTypeDescriptor;
 import org.hibernate.type.descriptor.sql.SqlTypeDescriptor;
 
 
@@ -47,11 +46,6 @@ public int getInExpressionCountLimit() {
 		return PARAM_LIST_SIZE_LIMIT;
 	}
 	
-	@Override
-	public boolean supportsNotNullUnique() {
-		return false;
-	}
-	
 	@Override
 	protected SqlTypeDescriptor getSqlTypeDescriptorOverride(int sqlCode) {
         return sqlCode == Types.BLOB ? BlobTypeDescriptor.PRIMITIVE_ARRAY_BINDING : super.getSqlTypeDescriptorOverride( sqlCode );