From dcd3bdb90ea7ed44d4478a1e405ca353fef31d9a Mon Sep 17 00:00:00 2001
From: Daobing Zhu <39407623+IcePigZDB@users.noreply.github.com>
Date: Thu, 9 Sep 2021 10:22:38 +0800
Subject: [PATCH] infoschema: add tidb_hot_regions_history virtual table
 (#27373)

---
 infoschema/tables.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/infoschema/tables.go b/infoschema/tables.go
index 5e92704f6c..20593738e0 100644
--- a/infoschema/tables.go
+++ b/infoschema/tables.go
@@ -107,6 +107,8 @@ const (
 	TableTiDBIndexes = "TIDB_INDEXES"
 	// TableTiDBHotRegions is the string constant of infoschema table
 	TableTiDBHotRegions = "TIDB_HOT_REGIONS"
+	// TableTiDBHotRegionsHistory is the string constant of infoschema table
+	TableTiDBHotRegionsHistory = "TIDB_HOT_REGIONS_HISTORY"
 	// TableTiKVStoreStatus is the string constant of infoschema table
 	TableTiKVStoreStatus = "TIKV_STORE_STATUS"
 	// TableAnalyzeStatus is the string constant of Analyze Status
@@ -272,6 +274,7 @@ var tableIDMap = map[string]int64{
 	TableStatementsSummaryEvicted:           autoid.InformationSchemaDBID + 75,
 	ClusterTableStatementsSummaryEvicted:    autoid.InformationSchemaDBID + 76,
 	TableRegionLabel:                        autoid.InformationSchemaDBID + 77,
+	TableTiDBHotRegionsHistory:              autoid.InformationSchemaDBID + 78,
 }
 
 type columnInfo struct {
@@ -879,6 +882,26 @@ var TableTiDBHotRegionsCols = []columnInfo{
 	{name: "FLOW_BYTES", tp: mysql.TypeLonglong, size: 21},
 }
 
+// TableTiDBHotRegionsHistoryCols is TiDB hot region history mem table columns.
+var TableTiDBHotRegionsHistoryCols = []columnInfo{
+	{name: "UPDATE_TIME", tp: mysql.TypeTimestamp, size: 26, decimal: 6},
+	{name: "DB_NAME", tp: mysql.TypeVarchar, size: 64},
+	{name: "TABLE_NAME", tp: mysql.TypeVarchar, size: 64},
+	{name: "TABLE_ID", tp: mysql.TypeLonglong, size: 21},
+	{name: "INDEX_NAME", tp: mysql.TypeVarchar, size: 64},
+	{name: "INDEX_ID", tp: mysql.TypeLonglong, size: 21},
+	{name: "REGION_ID", tp: mysql.TypeLonglong, size: 21},
+	{name: "STORE_ID", tp: mysql.TypeLonglong, size: 21},
+	{name: "PEER_ID", tp: mysql.TypeLonglong, size: 21},
+	{name: "IS_LEARNER", tp: mysql.TypeTiny, size: 1, flag: mysql.NotNullFlag, deflt: 0},
+	{name: "IS_LEADER", tp: mysql.TypeTiny, size: 1, flag: mysql.NotNullFlag, deflt: 0},
+	{name: "TYPE", tp: mysql.TypeVarchar, size: 64},
+	{name: "HOT_DEGREE", tp: mysql.TypeLonglong, size: 21},
+	{name: "FLOW_BYTES", tp: mysql.TypeDouble, size: 22},
+	{name: "KEY_RATE", tp: mysql.TypeDouble, size: 22},
+	{name: "QUERY_RATE", tp: mysql.TypeDouble, size: 22},
+}
+
 // TableTiKVStoreStatusCols is TiDB kv store status columns.
 var TableTiKVStoreStatusCols = []columnInfo{
 	{name: "STORE_ID", tp: mysql.TypeLonglong, size: 21},
@@ -1778,6 +1801,7 @@ var tableNameToColumns = map[string][]columnInfo{
 	TableTiDBIndexes:                        tableTiDBIndexesCols,
 	TableSlowQuery:                          slowQueryCols,
 	TableTiDBHotRegions:                     TableTiDBHotRegionsCols,
+	TableTiDBHotRegionsHistory:              TableTiDBHotRegionsHistoryCols,
 	TableTiKVStoreStatus:                    TableTiKVStoreStatusCols,
 	TableAnalyzeStatus:                      tableAnalyzeStatusCols,
 	TableTiKVRegionStatus:                   TableTiKVRegionStatusCols,