Hi, It seems to me that EquivalenceClass, the struct/type name, has been misspelled as 'EquivalenceClasses' a couple of times in the comment above its definition.
Attached fixes that. Thanks, Amit
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index 6fd24203dd..a695012c7a 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -863,7 +863,7 @@ typedef struct StatisticExtInfo } StatisticExtInfo; /* - * EquivalenceClasses + * EquivalenceClass * * Whenever we can determine that a mergejoinable equality clause A = B is * not delayed by any outer join, we create an EquivalenceClass containing @@ -880,7 +880,7 @@ typedef struct StatisticExtInfo * that all or none of the input datatypes are collatable, so that a single * collation value is sufficient.) * - * We also use EquivalenceClasses as the base structure for PathKeys, letting + * We also use EquivalenceClass as the base structure for PathKeys, letting * us represent knowledge about different sort orderings being equivalent. * Since every PathKey must reference an EquivalenceClass, we will end up * with single-member EquivalenceClasses whenever a sort key expression has
