Add triggers table via migration (#1088)

* Add triggers table via migration

api/datastore/sql/migrations/17_add_triggers.go

@@ -0,0 +1,38 @@
+package migrations
+
+import (
+	"context"
+
+	"github.com/fnproject/fn/api/datastore/sql/migratex"
+	"github.com/jmoiron/sqlx"
+)
+
+func up17(ctx context.Context, tx *sqlx.Tx) error {
+	createQuery := `CREATE TABLE IF NOT EXISTS triggers (
+	id varchar(256) NOT NULL PRIMARY KEY,
+	name varchar(256) NOT NULL,
+	app_id varchar(256) NOT NULL,
+	fn_id varchar(256) NOT NULL,
+	created_at varchar(256) NOT NULL,
+	updated_at varchar(256) NOT NULL,
+	type varchar(256) NOT NULL,
+	source varchar(256) NOT NULL,
+	annotations text NOT NULL,
+	CONSTRAINT name_app_id_fn_id_unique UNIQUE (app_id, fn_id, name)
+);`
+	_, err := tx.ExecContext(ctx, createQuery)
+	return err
+}
+
+func down17(ctx context.Context, tx *sqlx.Tx) error {
+	_, err := tx.ExecContext(ctx, "DROP TABLE triggers;")
+	return err
+}
+
+func init() {
+	Migrations = append(Migrations, &migratex.MigFields{
+		VersionFunc: vfunc(17),
+		UpFunc:      up17,
+		DownFunc:    down17,
+	})
+}