diff --git a/go/src/v.io/x/playground/compilerd/storage/db.go b/go/src/v.io/x/playground/compilerd/storage/db.go
index 9214252..099cac5 100644
--- a/go/src/v.io/x/playground/compilerd/storage/db.go
+++ b/go/src/v.io/x/playground/compilerd/storage/db.go
@@ -7,7 +7,6 @@
 import (
 	"fmt"
 
-	_ "github.com/go-sql-driver/mysql"
 	"github.com/jmoiron/sqlx"
 
 	"v.io/x/lib/dbutil"
diff --git a/go/src/v.io/x/playground/compilerd/storage/migration_test.go b/go/src/v.io/x/playground/compilerd/storage/migration_test.go
index 3c0d7cd..8ae0cdf 100644
--- a/go/src/v.io/x/playground/compilerd/storage/migration_test.go
+++ b/go/src/v.io/x/playground/compilerd/storage/migration_test.go
@@ -13,7 +13,6 @@
 	"fmt"
 	"testing"
 
-	_ "github.com/go-sql-driver/mysql"
 	"github.com/rubenv/sql-migrate"
 
 	"v.io/x/lib/dbutil"
diff --git a/go/src/v.io/x/playground/compilerd/storage/model.go b/go/src/v.io/x/playground/compilerd/storage/model.go
index 084f44b..7e70bab 100644
--- a/go/src/v.io/x/playground/compilerd/storage/model.go
+++ b/go/src/v.io/x/playground/compilerd/storage/model.go
@@ -35,7 +35,6 @@
 	"fmt"
 	"time"
 
-	_ "github.com/go-sql-driver/mysql"
 	"github.com/jmoiron/sqlx"
 
 	"v.io/x/playground/lib/hash"
diff --git a/go/src/v.io/x/playground/compilerd/storage/model_test.go b/go/src/v.io/x/playground/compilerd/storage/model_test.go
index a35196c..4b0cb4f 100644
--- a/go/src/v.io/x/playground/compilerd/storage/model_test.go
+++ b/go/src/v.io/x/playground/compilerd/storage/model_test.go
@@ -14,7 +14,6 @@
 	"fmt"
 	"testing"
 
-	_ "github.com/go-sql-driver/mysql"
 	"github.com/rubenv/sql-migrate"
 
 	"v.io/x/lib/dbutil"
diff --git a/go/src/v.io/x/playground/migrations/001-create-tables.sql b/go/src/v.io/x/playground/migrations/001-create-tables.sql
index 8e6626b..122688d 100644
--- a/go/src/v.io/x/playground/migrations/001-create-tables.sql
+++ b/go/src/v.io/x/playground/migrations/001-create-tables.sql
@@ -9,10 +9,11 @@
 	id CHAR(64) CHARACTER SET ascii NOT NULL PRIMARY KEY,
 	hash BINARY(32),
 	created_at TIMESTAMP NOT NULL DEFAULT now(),
-	FOREIGN KEY (hash) REFERENCES bundle_data(hash) ON DELETE SET NULL
+	CONSTRAINT hash_link_to_data FOREIGN KEY (hash) REFERENCES bundle_data(hash) ON DELETE SET NULL
 ) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
 
 -- +migrate Down
 
 DROP TABLE bundle_link;
+
 DROP TABLE bundle_data;