XYZ-110: Cherrypicking changes from release-4.7 to master (#8254)

* Cherry-picking 7b2861de3a to master because enterprise/master has code in it that enterprise/release-4.7 does not, and I don't want enterprise/master to break the next time somebody merges enterprise/release-4.7 to enterprise/master

* Renamed file to match existing scheme

(cherry picked from commit 8c22c5c6c6)

store/sqlstore/channel_member_history_store.go

@@ -106,7 +106,7 @@ func (s SqlChannelMemberHistoryStore) hasDataAtOrBefore(time int64) (bool, error
 	}
 }
 
-func (s SqlChannelMemberHistoryStore) getFromChannelMemberHistoryTable(startTime int64, endTime int64, channelId string) ([]*model.ChannelMemberHistory, error) {
+func (s SqlChannelMemberHistoryStore) getFromChannelMemberHistoryTable(startTime int64, endTime int64, channelId string) ([]*model.ChannelMemberHistoryResult, error) {
 	query := `
 			SELECT
 				cmh.*,
@@ -120,7 +120,7 @@ func (s SqlChannelMemberHistoryStore) getFromChannelMemberHistoryTable(startTime
 			ORDER BY cmh.JoinTime ASC`
 
 	params := map[string]interface{}{"ChannelId": channelId, "StartTime": startTime, "EndTime": endTime}
-	var histories []*model.ChannelMemberHistory
+	var histories []*model.ChannelMemberHistoryResult
 	if _, err := s.GetReplica().Select(&histories, query, params); err != nil {
 		return nil, err
 	} else {
@@ -128,7 +128,7 @@ func (s SqlChannelMemberHistoryStore) getFromChannelMemberHistoryTable(startTime
 	}
 }
 
-func (s SqlChannelMemberHistoryStore) getFromChannelMembersTable(startTime int64, endTime int64, channelId string) ([]*model.ChannelMemberHistory, error) {
+func (s SqlChannelMemberHistoryStore) getFromChannelMembersTable(startTime int64, endTime int64, channelId string) ([]*model.ChannelMemberHistoryResult, error) {
 	query := `
 		SELECT DISTINCT
 			ch.ChannelId,
@@ -140,7 +140,7 @@ func (s SqlChannelMemberHistoryStore) getFromChannelMembersTable(startTime int64
 		WHERE ch.ChannelId = :ChannelId`
 
 	params := map[string]interface{}{"ChannelId": channelId}
-	var histories []*model.ChannelMemberHistory
+	var histories []*model.ChannelMemberHistoryResult
 	if _, err := s.GetReplica().Select(&histories, query, params); err != nil {
 		return nil, err
 	} else {

store/sqlstore/upgrade.go

@@ -346,6 +346,8 @@ func UpgradeDatabaseToVersion47(sqlStore SqlStore) {
 	if shouldPerformUpgrade(sqlStore, VERSION_4_6_0, VERSION_4_7_0) {
 		sqlStore.AlterColumnTypeIfExists("Users", "Position", "varchar(128)", "varchar(128)")
 		sqlStore.AlterColumnTypeIfExists("OAuthAuthData", "State", "varchar(1024)", "varchar(1024)")
+		sqlStore.RemoveColumnIfExists("ChannelMemberHistory", "Email")
+		sqlStore.RemoveColumnIfExists("ChannelMemberHistory", "Username")
 		saveSchemaVersion(sqlStore, VERSION_4_7_0)
 	}
 }