domain: Log the tables and schema versions when reporting `Informatio…

…n schema is changed` (pingcap#31182)

close pingcap#31181

domain/schema_validator.go

@@ -185,14 +185,20 @@ func (s *schemaValidator) isRelatedTablesChanged(currVer int64, tableIDs []int64
 	}
 
 	changedTblMap := make(map[int64]uint64)
+	changedSchemaVers := make([]int64, 0)
 	for _, item := range newerDeltas {
+		affected := false
 		for i, tblID := range item.relatedIDs {
 			for _, relatedTblID := range tableIDs {
 				if tblID == relatedTblID {
 					changedTblMap[tblID] |= item.relatedActions[i]
+					affected = true
 				}
 			}
 		}
+		if affected {
+			changedSchemaVers = append(changedSchemaVers, item.schemaVersion)
+		}
 	}
 	if len(changedTblMap) > 0 {
 		tblIds := make([]int64, 0, len(changedTblMap))
@@ -207,6 +213,8 @@ func (s *schemaValidator) isRelatedTablesChanged(currVer int64, tableIDs []int64
 		res.PhyTblIDS = tblIds
 		res.ActionTypes = actionTypes
 		res.Amendable = true
+		logutil.BgLogger().Info("schema of tables in the transaction are changed", zap.Int64s("conflicted table IDs", tblIds),
+			zap.Int64("transaction schema", currVer), zap.Int64s("schema versions that changed the tables", changedSchemaVers))
 		return res, true
 	}
 	return res, false