Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

br: skip template system table __TiDB_BR_Temporary_mysql when backup (#41000) #41250

Merged
merged 2 commits into from
Feb 13, 2023
Merged

br: skip template system table __TiDB_BR_Temporary_mysql when backup (#41000) #41250

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
dfbc0d5
skip temporary system database(__TiDB_BR_Temporary_mysql) when backup
joccau Feb 2, 2023
31cb972
add integration case for skip __TiDB_BR_Temporary_mysql when backup
joccau Feb 2, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion br/pkg/backup/client.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -529,7 +529,7 @@ func BuildBackupRangeAndSchema(

for _, dbInfo := range dbs {
// skip system databases
if !tableFilter.MatchSchema(dbInfo.Name.O) || util.IsMemDB(dbInfo.Name.L) {
if !tableFilter.MatchSchema(dbInfo.Name.O) || util.IsMemDB(dbInfo.Name.L) || utils.IsTemplateSysDB(dbInfo.Name) {
continue
}

Expand Down
6 changes: 6 additions & 0 deletions br/pkg/utils/schema.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ import (

// temporaryDBNamePrefix is the prefix name of system db, e.g. mysql system db will be rename to __TiDB_BR_Temporary_mysql
const temporaryDBNamePrefix = "__TiDB_BR_Temporary_"
const temporarySysDB = temporaryDBNamePrefix + "mysql"

// NeedAutoID checks whether the table needs backing up with an autoid.
func NeedAutoID(tblInfo *model.TableInfo) bool {
Expand Down Expand Up @@ -96,6 +97,11 @@ func EncloseDBAndTable(database, table string) string {
return fmt.Sprintf("%s.%s", EncloseName(database), EncloseName(table))
}

// IsTemplateSysDB checks wheterh the dbname is temporary system database(__TiDB_BR_Temporary_mysql).
func IsTemplateSysDB(dbname model.CIStr) bool {
return dbname.O == temporarySysDB
}

// IsSysDB tests whether the database is system DB.
// Currently, the only system DB is mysql.
func IsSysDB(dbLowerName string) bool {
Expand Down
14 changes: 14 additions & 0 deletions br/tests/br_backup_empty/run.sh
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,7 @@ run_sql "CREATE TABLE ${DB}1.usertable1 ( \
PRIMARY KEY (YCSB_KEY) \
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;"

# backup empty table
echo "backup empty table start..."
run_br --pd $PD_ADDR backup full -s "local://$TEST_DIR/empty_table"

Expand All @@ -75,6 +76,7 @@ while [ $i -le $DB_COUNT ]; do
i=$(($i+1))
done

# restore empty table.
echo "restore empty table start..."
run_br --pd $PD_ADDR restore full -s "local://$TEST_DIR/empty_table"

Expand All @@ -85,3 +87,15 @@ while [ $i -le $DB_COUNT ]; do
run_sql "DROP DATABASE $DB$i;"
i=$(($i+1))
done


# backup, skip temporary system database(__TiDB_BR_Temporary_mysql) when backup
run_sql "CREATE DATABASE __TiDB_BR_Temporary_mysql";
run_sql "CREATE TABLE __TiDB_BR_Temporary_mysql.tables_priv(id int);";
echo "backup and skip __TiDB_BR_Temporary_mysql start..."
run_br --pd $PD_ADDR backup full -s "local://$TEST_DIR/skip_temporary_mysql"

# restore successfully without panic.
run_sql "DROP DATABASE __TiDB_BR_Temporary_mysql";
echo "restore the data start..."
run_br restore full -s "local://$TEST_DIR/skip_temporary_mysql" --pd $PD_ADDR --ratelimit 1024