Create index to make sort by starred faster

db/migrations/20201003111749_add_starred_at_index.go

@@ -0,0 +1,23 @@
+package migrations
+
+import (
+	"database/sql"
+
+	"github.com/pressly/goose"
+)
+
+func init() {
+	goose.AddMigration(Up20201003111749, Down20201003111749)
+}
+
+func Up20201003111749(tx *sql.Tx) error {
+	_, err := tx.Exec(`
+create index if not exists annotation_starred_at
+	on annotation (starred_at);
+    `)
+	return err
+}
+
+func Down20201003111749(tx *sql.Tx) error {
+	return nil
+}