Error while fetching the data with column type "Array(Nullable(String))"

[haudoing]

What happened:
The column type "Array(Nullable(String))" is not tested in either pkg/converters/converters_test.go or pkg/plugin/driver_test.go. I made one test case in file pkg/plugin/driver_test.go on my local then sometimes I found the error below on line 280.

sql: Scan error on column index 0, name "col1": unsupported Scan, storing driver.Value type []*string into type *string

The function I wrote looks like this

func TestArrayNullableString(t *testing.T) {
	for name, protocol := range Protocols {
		t.Run(fmt.Sprintf("using %s", name), func(t *testing.T) {
			var val []*string
			conn, close := setupTest(t, "col1 Array(Nullable(String))", protocol, nil)
			defer close(t)
			v := "48"
			val = append(val, &v, nil)
			insertData(t, conn, val)
			checkRows(t, conn, 1, val)
		})
	}
}

What you expected to happen:
Expecting no error while using the plugin with the column type "Array(Nullable(String))"

How to reproduce it (as minimally and precisely as possible):

Screenshots

Anything else we need to know?:
This error does not always appear.

Environment:

• Grafana version:
• Plugin version: v4.0.3
• OS Grafana is installed on:
• User OS & Browser: Linux mint 21.3
• Others:

[haudoing]

The PR above fixes my problem and all the tests are running fine.