1 files changed, 35 insertions, 0 deletions
diff --git a/mysql-test/suite/sysschema/t/mysqldump.test b/mysql-test/suite/sysschema/t/mysqldump.test
new file mode 100644
index 00000000..35abc704
--- /dev/null
+++ b/mysql-test/suite/sysschema/t/mysqldump.test
@@ -0,0 +1,35 @@
+-- source include/not_embedded.inc
+-- source include/have_innodb.inc
+# Dump all databases
+--exec $MYSQL_DUMP -uroot --all-databases > $MYSQLTEST_VARDIR/tmp/bug20902791.sql
+
+# Save a copy of the user/tables_priv, to restore later
+# Otherwise the final mysql_upgrade will REPLACE and update timestamps etc.
+CREATE TEMPORARY TABLE tmp_global_priv AS SELECT * FROM mysql.global_priv;
+CREATE TEMPORARY TABLE tmp_tables_priv AS SELECT * FROM mysql.tables_priv;
+
+# Remove the sys schema
+DROP DATABASE sys;
+
+# Reload the dump
+--exec $MYSQL < $MYSQLTEST_VARDIR/tmp/bug20902791.sql
+
+# The sys schema should not exist
+SHOW DATABASES;
+
+# Finally reload the sys schema to return to normal
+--exec $MYSQL_UPGRADE --skip-verbose --force 2>&1
+SHOW DATABASES;
+
+# Restore the saved privileges
+TRUNCATE TABLE mysql.global_priv;
+INSERT INTO mysql.global_priv (SELECT * FROM tmp_global_priv);
+DROP TEMPORARY TABLE tmp_global_priv;
+
+TRUNCATE TABLE mysql.tables_priv;
+INSERT INTO mysql.tables_priv (SELECT * FROM tmp_tables_priv);
+DROP TEMPORARY TABLE tmp_tables_priv;
+
+FLUSH PRIVILEGES;
+--let $MYSQLD_DATADIR= `select @@datadir`
+--remove_file $MYSQLD_DATADIR/mysql_upgrade_info