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-rw-r--r--mysql-test/suite/sys_vars/t/extra_port_basic.test21
1 files changed, 21 insertions, 0 deletions
diff --git a/mysql-test/suite/sys_vars/t/extra_port_basic.test b/mysql-test/suite/sys_vars/t/extra_port_basic.test
new file mode 100644
index 00000000000..af5500e7ab7
--- /dev/null
+++ b/mysql-test/suite/sys_vars/t/extra_port_basic.test
@@ -0,0 +1,21 @@
+# ulong readonly
+
+#
+# show the global and session values;
+#
+select @@global.extra_port;
+--error ER_INCORRECT_GLOBAL_LOCAL_VAR
+select @@session.extra_port;
+show global variables like 'extra_port';
+show session variables like 'extra_port';
+select * from information_schema.global_variables where variable_name='extra_port';
+select * from information_schema.session_variables where variable_name='extra_port';
+
+#
+# show that it's read-only
+#
+--error ER_INCORRECT_GLOBAL_LOCAL_VAR
+set global extra_port=1;
+--error ER_INCORRECT_GLOBAL_LOCAL_VAR
+set session extra_port=1;
+