Re: Doubt in IndexScanDescData

[ "include/access/relscan.h" ]

In  IndexScanDescData,  whats the purpose of having two Relation variables.

typedef struct IndexScanDescData
{
        Relation        heapRelation;   /* heap relation descriptor, or NULL */
        Relation        indexRelation;  /* index relation descriptor */
....
...
}IndexScanDescData;