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Commit79c50ca

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Update plannodes.h's comments about PlanRowMark.
The reference here to different physical column numbers in inheritedUPDATE/DELETE plans is obsolete as of86dc900; remove it. Alsorework the text about inheritance cases to make it clearer.
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‎src/include/nodes/plannodes.h

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@@ -1086,9 +1086,9 @@ typedef enum RowMarkType
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* When the planner discovers that a relation is the root of an inheritance
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* tree, it sets isParent true, and adds an additional PlanRowMark to the
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* list for each child relation (including the target rel itself in its role
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* as a child). isParent isalso set to true for the partitioned child
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* relations, which are not scanned just like the root parent. The child
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* entries have rti == child rel's RT index and prti == parent's RT index,
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* as a child, if it isnot a partitioned table). Any non-leaf partitioned
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*childrelations will also have entries with isParent = true. The child
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* entries have rti == child rel's RT index and prti ==topparent's RT index,
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* and can therefore be recognized as children by the fact that prti != rti.
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* The parent's allMarkTypes field gets the OR of (1<<markType) across all
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* its children (this definition allows children to use different markTypes).
@@ -1109,8 +1109,7 @@ typedef enum RowMarkType
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* means we needn't renumber rowmarkIds when flattening subqueries, which
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* would require finding and renaming the resjunk columns as well.)
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* Note this means that all tables in an inheritance hierarchy share the
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* same resjunk column names. However, in an inherited UPDATE/DELETE the
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* columns could have different physical column numbers in each subplan.
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* same resjunk column names.
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*/
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typedefstructPlanRowMark
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{

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