diff options
Diffstat (limited to 'src/include/nodes/primnodes.h')
| -rw-r--r-- | src/include/nodes/primnodes.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index d73be2ad46c..fd65ee8f9c5 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -736,6 +736,9 @@ typedef struct SubPlan /* * AlternativeSubPlan - expression node for a choice among SubPlans * + * This is used only transiently during planning: by the time the plan + * reaches the executor, all AlternativeSubPlan nodes have been removed. + * * The subplans are given as a List so that the node definition need not * change if there's ever more than two alternatives. For the moment, * though, there are always exactly two; and the first one is the fast-start |