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Posted to derby-commits@db.apache.org by mi...@apache.org on 2013/02/20 23:57:04 UTC
svn commit: r1448457 -
/db/derby/code/trunk/java/engine/org/apache/derby/impl/store/raw/data/StoredPage.java
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(