Update find_best_task.go

Adjustment to 7.5 codebase

Author: terry1purcell

pkg/planner/core/find_best_task.go

@@ -741,7 +741,7 @@ func compareIndexBack(lhs, rhs *candidatePath) (int, bool) {
 
 // compareCandidates is the core of skyline pruning, which is used to decide which candidate path is better.
 // The return value is 1 if lhs is better, -1 if rhs is better, 0 if they are equivalent or not comparable.
-func compareCandidates(sctx base.PlanContext, statsTbl *statistics.Table, prop *property.PhysicalProperty, lhs, rhs *candidatePath) int {
+func compareCandidates(sctx base.PlanContext, prop *property.PhysicalProperty, lhs, rhs *candidatePath) int {
 	// Due to #50125, full scan on MVIndex has been disabled, so MVIndex path might lead to 'can't find a proper plan' error at the end.
 	// Avoid MVIndex path to exclude all other paths and leading to 'can't find a proper plan' error, see #49438 for an example.
 	if isMVIndexPath(lhs.path) || isMVIndexPath(rhs.path) {
@@ -752,11 +752,11 @@ func compareCandidates(sctx base.PlanContext, statsTbl *statistics.Table, prop *
 	// has the same or higher number of equal/IN predicates.
 	lhsHasStatistics := statsTbl.Pseudo
 	if statsTbl != nil && lhs.path.Index != nil {
-		lhsHasStatistics = statsTbl.ColAndIdxExistenceMap.HasAnalyzed(lhs.path.Index.ID, true)
+		lhsHasStatistics = lhs.path.Index.IsAnalyzed()
 	}
 	rhsHasStatistics := statsTbl.Pseudo
 	if statsTbl != nil && rhs.path.Index != nil {
-		rhsHasStatistics = statsTbl.ColAndIdxExistenceMap.HasAnalyzed(rhs.path.Index.ID, true)
+		rhsHasStatistics = rhs.path.Index.IsAnalyzed()
 	}
 	if !lhs.path.IsTablePath() && !rhs.path.IsTablePath() && // Not a table scan
 		(lhsHasStatistics || rhsHasStatistics) && // At least one index has statistics
@@ -942,7 +942,7 @@ func (ds *DataSource) skylinePruning(prop *property.PhysicalProperty) []*candida
 			if candidates[i].path.StoreType == kv.TiFlash {
 				continue
 			}
-			result := compareCandidates(ds.SCtx(), ds.StatisticTable, prop, candidates[i], currentCandidate)
+			result := compareCandidates(ds.SCtx(), prop, candidates[i], currentCandidate)
 			if result == 1 {
 				pruned = true
 				// We can break here because the current candidate cannot prune others anymore.