go-sql-driver/mysql stalls on locked table access

main.go

package main

import (
	"database/sql"
	"fmt"
	"log"

	_ "github.com/go-sql-driver/mysql"
)

func main() {
	db, err := sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s:3306)/%s", "root", "", "127.0.0.1", "test"))
	if err != nil {
		log.Fatal(err)
	}

	// The rest assumes a test table, foo, exists with some data in it.

	// Create bar using foo's schema.
	log.Print("CREATE TABLE bar LIKE foo")
	_, err = db.Query(fmt.Sprintf("CREATE TABLE bar LIKE foo"))
	if err != nil {
		log.Fatal(err)
	}

	// Lock both tables.
	log.Print("LOCK TABLE foo WRITE, bar WRITE")
	_, err = db.Query(fmt.Sprintf("LOCK TABLE foo WRITE, bar WRITE"))
	if err != nil {
		log.Fatal(err)
	}

	// Fill bar with all the data in foo.
	log.Print("INSERT INTO bar SELECT * FROM foo")
	_, err = db.Query("INSERT INTO bar SELECT * FROM foo")
	if err != nil {
		log.Fatal(err)
	}

	// Unlock the tables.
	log.Print("UNLOCK TABLES")
	_, err = db.Query("UNLOCK TABLES")
	if err != nil {
		log.Fatal(err)
	}
}

The SQL used for the foo table was simply:

mysql> CREATE TABLE foo (id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, data VARCHAR(100));
Query OK, 0 rows affected (0.01 sec)

mysql> INSERT INTO foo (data) VALUES ('Hello world');
Query OK, 1 row affected (0.01 sec)