statistics: refine table filtering in analysis job creation to exclud…

…e memory and system databases

Signed-off-by: Rustin170506 <[email protected]>

pkg/statistics/handle/autoanalyze/priorityqueue/queue.go

@@ -221,13 +221,15 @@ func (pq *AnalysisPriorityQueue) fetchAllTablesAndBuildAnalysisJobs() error {
 
 		jobFactory := NewAnalysisJobFactory(sctx, autoAnalyzeRatio, currentTs)
 		snapshot := sctx.GetStore().GetSnapshot(kv.NewVersion(currentTs))
+		is := sctx.GetDomainInfoSchema().(infoschema.InfoSchema)
 		m := meta.NewReader(snapshot)
 		tbls := make([]*model.TableInfo, 0, 1024)
 		if err := m.IterAllTables(func(info *model.TableInfo) error {
 			// Ignore the memory and system database.
-			// if util.IsMemOrSysDB(db.L) {
-			// 	continue
-			// }
+			db, ok := is.SchemaByID(info.DBID)
+			if !ok || util.IsMemOrSysDB(db.Name.L) {
+				return nil
+			}
 			tbls = append(tbls, info)
 			return nil
 		}); err != nil {