Reversing patch for 193668.  Want to communicate this change before it goes into the build.
diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/IJpaPlatform.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/IJpaPlatform.java
index 02516f5..25d4cf0 100644
--- a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/IJpaPlatform.java
+++ b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/IJpaPlatform.java
@@ -146,17 +146,4 @@
 	 * @return
 	 */
 	//	IGeneratorRepository generatorRepository(IPersistentType persistentType);
-	
-	/**
-	 * If an SQL identifier is derived from a Java identifier by following a 
-	 * default rule, a JPA implementation may perform some conversion, e.g. 
-	 * convert the case of the identifier. This method allows to implement 
-	 * such a conversion in a platform-dependent way.
-	 * 
-	 * @param javaIdentifier the Java identifier to be converted
-	 * 
-	 * @return the converted SQL identifier
-	 */
-	String convertJavaIdentifierToDatabaseIdentifier(String javaIdentifier); 
-	
 }
\ No newline at end of file
diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/BaseJpaPlatform.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/BaseJpaPlatform.java
index 4ce391d..83e7046 100644
--- a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/BaseJpaPlatform.java
+++ b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/BaseJpaPlatform.java
@@ -212,10 +212,6 @@
 		context.refreshDefaults(new NullProgressMonitor());
 		context.addToMessages(messages);
 	}
-
-	public String convertJavaIdentifierToDatabaseIdentifier(String javaIdentifier) {
-		return javaIdentifier;
-	}
 	
 //	public IGeneratorRepository generatorRepository(IPersistentType persistentType) {
 //		return ((BaseJpaProjectContext) context).generatorRepository(persistentType);
diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaAttributeContext.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaAttributeContext.java
index e791fc7..3c003d8 100644
--- a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaAttributeContext.java
+++ b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaAttributeContext.java
@@ -76,7 +76,7 @@
 	
 	protected Object getDefault(String key, DefaultsContext defaultsContext) {
 		if (key.equals(BaseJpaPlatform.DEFAULT_COLUMN_NAME_KEY)) {
-			return getPlatform().convertJavaIdentifierToDatabaseIdentifier(getMapping().getPersistentAttribute().getName());			
+			return getMapping().getPersistentAttribute().getName();			
 		}
 		return defaultsContext.getDefault(key);
 	}
diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaEntityContext.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaEntityContext.java
index 4bfa971..a909883 100644
--- a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaEntityContext.java
+++ b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaEntityContext.java
@@ -155,11 +155,11 @@
 					if (getEntity().rootEntity().getInheritanceStrategy().isSingleTable()) {
 						IEntity rootEntity = getEntity().rootEntity();
 						if (rootEntity == getEntity()) {
-							return getPlatform().convertJavaIdentifierToDatabaseIdentifier(rootEntity.getName());
+							return rootEntity.getName();
 						}
 						return rootEntity.getTable().getName();
 					}
-					return getPlatform().convertJavaIdentifierToDatabaseIdentifier(getEntity().getName());
+					return getEntity().getName();
 				}
 				return defaultsContext.getDefault(key);
 			}
diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaPersistentAttributeContext.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaPersistentAttributeContext.java
index 4afa522..b63e561 100644
--- a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaPersistentAttributeContext.java
+++ b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JavaPersistentAttributeContext.java
@@ -93,7 +93,7 @@
 	
 	protected Object getDefault(String key, DefaultsContext defaultsContext) {
 		if (key.equals(BaseJpaPlatform.DEFAULT_COLUMN_NAME_KEY)) {
-			return getPlatform().convertJavaIdentifierToDatabaseIdentifier(getPersistentAttribute().getName());			
+			return getPersistentAttribute().getName();			
 		}
 		return defaultsContext.getDefault(key);
 	}
diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JoinColumnContext.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JoinColumnContext.java
index f8bb1ab..648f412 100644
--- a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JoinColumnContext.java
+++ b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/JoinColumnContext.java
@@ -44,7 +44,6 @@
 		if (prefix == null) {
 			return null;
 		}
-		prefix = getPlatform().convertJavaIdentifierToDatabaseIdentifier(prefix);
 		// TODO not sure which of these is correct...
 		// (the spec implies that the referenced column is always the
 		// primary key column of the target entity)
diff --git a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/XmlEntityContext.java b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/XmlEntityContext.java
index 5cc3ef7..8dc7613 100644
--- a/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/XmlEntityContext.java
+++ b/jpa/plugins/org.eclipse.jpt.core/src/org/eclipse/jpt/core/internal/platform/XmlEntityContext.java
@@ -349,11 +349,11 @@
 			if (getEntity().rootEntity().getInheritanceStrategy().isSingleTable()) {
 				IEntity rootEntity = getEntity().rootEntity();
 				if (rootEntity == getEntity()) {
-					return getPlatform().convertJavaIdentifierToDatabaseIdentifier(rootEntity.getName());
+					return rootEntity.getName();
 				}
 				return rootEntity.getTable().getName();
 			}
-			return getPlatform().convertJavaIdentifierToDatabaseIdentifier(getEntity().getName());
+			return getEntity().getName();
 		}
 		return super.getDefault(key, defaultsContext);
 	}