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From mi...@apache.org
Subject svn commit: r1448457 - /db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/data/StoredPage.java
Date Wed, 20 Feb 2013 22:57:04 GMT
Author: mikem
Date: Wed Feb 20 22:57:03 2013
New Revision: 1448457

URL: http://svn.apache.org/r1448457
Log:
DERBY-5679

just an improved comment.


Modified:
    db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/data/StoredPage.java

Modified: db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/data/StoredPage.java
URL: http://svn.apache.org/viewvc/db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/data/StoredPage.java?rev=1448457&r1=1448456&r2=1448457&view=diff
==============================================================================
--- db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/data/StoredPage.java (original)
+++ db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/data/StoredPage.java Wed
Feb 20 22:57:03 2013
@@ -3974,8 +3974,12 @@ public class StoredPage extends CachedPa
                     {
                         // this is an update that is increasing the number of 
                         // columns but not providing any value. this can happen
-                        // if you are updating a new column after using
-                        // ALTER TABLE to add a couple new columns.
+                        // if you are updating a new column that does not 
+                        // actually exist in the table after using
+                        // ALTER TABLE to add a couple new columns.  This
+                        // case is going to create actual null entries for
+                        // the non-existent columns that are before the actual
+                        // column being updated by the user.
                         // see DERBY-5679.
                         spaceAvailable = 
                             logColumn(



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