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Update TODO notes for Insertion and Deletion optimizations

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1 parent e1b6b33 commit a3d9156ec582c44c938563d2053e85c7f898ebcf @dkubb committed May 31, 2012
Showing with 8 additions and 2 deletions.
  1. +8 −2 TODO
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10 TODO
@@ -1,5 +1,11 @@
-* Add optimizer for empty left or empty right operands to an Insertion
-* Add optimizer for empty left or empty right operands to a Deletion
+* Add optimizer for empty right operand to an Insertion
+ * Should factor out the Insertion
+
+* Add optimizer for empty left operand to a Deletion
+ * Should return an Empty relation, since deleting anything from an empty
+ relation always results in an empty Relation
+* Add optimizer for empty right operand to a Deletion
+ * Should factor out the Deletion
* Add an assertion to every #optimize spec that if #optimizable? is true, then
the object returned by #optimize must *not* be equivalent. This will ensure

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