statistics: skip create pseudo stats for partitions (#51123)

close #50100

Author: 0xPoe

pkg/statistics/handle/autoanalyze/autoanalyze.go

@@ -467,7 +467,7 @@ func getPartitionStats(
 	partitionStats := make(map[int64]*statistics.Table, len(defs))
 
 	for _, def := range defs {
-		partitionStats[def.ID] = statsHandle.GetPartitionStats(tblInfo, def.ID)
+		partitionStats[def.ID] = statsHandle.GetPartitionStatsForAutoAnalyze(tblInfo, def.ID)
 	}
 
 	return partitionStats
@@ -599,10 +599,10 @@ func tryAutoAnalyzePartitionTableInDynamicMode(
 
 	for _, def := range partitionDefs {
 		partitionStatsTbl := partitionStats[def.ID]
-		// 1. If the stats are not loaded, we don't need to analyze it.
+		// 1. If the statistics are either not loaded or are classified as pseudo, there is no need for analyze.
 		// 2. If the table is too small, we don't want to waste time to analyze it.
 		//    Leave the opportunity to other bigger tables.
-		if partitionStatsTbl.Pseudo || partitionStatsTbl.RealtimeCount < AutoAnalyzeMinCnt {
+		if partitionStatsTbl == nil || partitionStatsTbl.RealtimeCount < AutoAnalyzeMinCnt {
 			continue
 		}
 		if needAnalyze, reason := NeedAnalyzeTable(

pkg/statistics/handle/handle.go

@@ -149,7 +149,7 @@ func (h *Handle) GetTableStats(tblInfo *model.TableInfo) *statistics.Table {
 	return h.GetPartitionStats(tblInfo, tblInfo.ID)
 }
 
-// GetTableStatsForAutoAnalyze is to get table stats but it will
+// GetTableStatsForAutoAnalyze is to get table stats but it will not return pseudo stats.
 func (h *Handle) GetTableStatsForAutoAnalyze(tblInfo *model.TableInfo) *statistics.Table {
 	return h.getPartitionStats(tblInfo, tblInfo.ID, false)
 }
@@ -160,6 +160,11 @@ func (h *Handle) GetPartitionStats(tblInfo *model.TableInfo, pid int64) *statist
 	return h.getPartitionStats(tblInfo, pid, true)
 }
 
+// GetPartitionStatsForAutoAnalyze is to get partition stats but it will not return pseudo stats.
+func (h *Handle) GetPartitionStatsForAutoAnalyze(tblInfo *model.TableInfo, pid int64) *statistics.Table {
+	return h.getPartitionStats(tblInfo, pid, false)
+}
+
 func (h *Handle) getPartitionStats(tblInfo *model.TableInfo, pid int64, returnPseudo bool) *statistics.Table {
 	var tbl *statistics.Table
 	if h == nil {

pkg/statistics/handle/types/interfaces.go

@@ -445,6 +445,9 @@ type StatsHandle interface {
 	// GetPartitionStats retrieves the partition stats from cache.
 	GetPartitionStats(tblInfo *model.TableInfo, pid int64) *statistics.Table
 
+	// GetPartitionStatsForAutoAnalyze retrieves the partition stats from cache, but it will not return pseudo.
+	GetPartitionStatsForAutoAnalyze(tblInfo *model.TableInfo, pid int64) *statistics.Table
+
 	// StatsGC is used to do the GC job.
 	StatsGC