update description

site/docs/relations/physical_relations.md

@@ -52,7 +52,7 @@ The Duplicate Eliminated Join, along with the [Duplicate Eliminated Get Operator
 
 The Duplicate Eliminated Join is essentially a [Regular Join Operator](logical_relations.md#join-operator). It can have any regular join type, and its execution is the same.  The only restriction is that the join must be a hash equi-join. The main difference is that one of its children has, somewhere in its subtree, a dependency on the deduplicated result of the other. Therefore, this operator pushes the deduplicated result to its dependent child via the Duplicate Eliminated Get Operator. The side that will be deduplicated is specified in the Duplicate Eliminated Side property. The other side is the one that depends on the deduplication.
 
-The duplicate eliminated join has two outputs.  The first output is no different than a regular join output.  The second output is the output to the duplicate eliminated get operator.  This output contains only the columns listed in the `duplicate_eliminated_columns` property.  This output must be emitted as soon as the build phase is complete.  This is because this output is required to compute the probe input.
+The Duplicate Eliminated Join has two outputs.  The first output is no different than a regular join output.  The second output is the output to the duplicate eliminated get operator.  This output contains only the columns listed in the `duplicate_eliminated_columns` property.  This output contains only the columns listed in the `duplicate_eliminated_columns` property, corresponding to the side depicted by the `duplicate_eliminated_side`. Note that either the build side or the probe side can be deduplicated and then pushed to the other.
 
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