From 7908f697b4001df73e3aaa93cc69aeab2db8af85 Mon Sep 17 00:00:00 2001
From: tangenta <tangenta@126.com>
Date: Tue, 18 Apr 2023 19:13:35 +0800
Subject: [PATCH] planner: skip stats warnings for temporary table during
 optimize (#43147)

close pingcap/tidb#43142
---
 planner/core/plan_stats.go | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/planner/core/plan_stats.go b/planner/core/plan_stats.go
index eaf3cf3120..f4980a669d 100644
--- a/planner/core/plan_stats.go
+++ b/planner/core/plan_stats.go
@@ -178,11 +178,11 @@ func recordTableRuntimeStats(sctx sessionctx.Context, tbls map[int64]struct{}) {
 		tblStats = map[int64]interface{}{}
 	}
 	for tblID := range tbls {
-		tblJSONStats, err := recordSingleTableRuntimeStats(sctx, tblID)
+		tblJSONStats, skip, err := recordSingleTableRuntimeStats(sctx, tblID)
 		if err != nil {
 			logutil.BgLogger().Warn("record table json stats failed", zap.Int64("tblID", tblID), zap.Error(err))
 		}
-		if tblJSONStats == nil {
+		if tblJSONStats == nil && !skip {
 			logutil.BgLogger().Warn("record table json stats failed due to empty", zap.Int64("tblID", tblID))
 		}
 		tblStats[tblID] = tblJSONStats
@@ -190,15 +190,17 @@ func recordTableRuntimeStats(sctx sessionctx.Context, tbls map[int64]struct{}) {
 	sctx.GetSessionVars().StmtCtx.TableStats = tblStats
 }
 
-func recordSingleTableRuntimeStats(sctx sessionctx.Context, tblID int64) (*statistics.Table, error) {
+func recordSingleTableRuntimeStats(sctx sessionctx.Context, tblID int64) (stats *statistics.Table, skip bool, err error) {
 	dom := domain.GetDomain(sctx)
-	is := dom.InfoSchema()
 	statsHandle := dom.StatsHandle()
+	is := sctx.GetDomainInfoSchema().(infoschema.InfoSchema)
 	tbl, ok := is.TableByID(tblID)
 	if !ok {
-		return nil, nil
+		return nil, false, nil
 	}
 	tableInfo := tbl.Meta()
-	stats := statsHandle.GetTableStats(tableInfo)
-	return stats, nil
+	stats = statsHandle.GetTableStats(tableInfo)
+	// Skip the warning if the table is a temporary table because the temporary table doesn't have stats.
+	skip = tableInfo.TempTableType != model.TempTableNone
+	return stats, skip, nil
 }