Retain the setup connection to ensure shared cache does not get busted

_integration-tests/tests/sql/sql.go

@@ -20,38 +20,49 @@ import (
 
 type TestCase struct {
 	*sql.DB
+	// untraced is the un-traced database connection, used to set up the test case
+	// without producing unnecessary spans. It is retained as a [TestCase] field
+	// and cleaned up using [t.Cleanup] to ensure the shared cache is not lost, as
+	// it stops existing once the last DB connection using it is closed.
+	untraced *sql.DB
 }
 
 func (tc *TestCase) Setup(t *testing.T) {
+	const (
+		dn  = "sqlite3"
+		dsn = "file::memory:?cache=shared"
+	)
+
+	var err error
+
 	//orchestrion:ignore
-	prepareConn, err := sql.Open("sqlite3", "file::memory:?cache=shared")
+	tc.untraced, err = sql.Open(dn, dsn)
 	require.NoError(t, err)
+	t.Cleanup(func() { require.NoError(t, tc.untraced.Close()) })
 
-	func() {
-		defer prepareConn.Close()
+	ctx := context.Background()
 
-		_, err = prepareConn.ExecContext(context.Background(),
-			`CREATE TABLE IF NOT EXISTS notes (
+	_, err = tc.untraced.ExecContext(ctx,
+		`CREATE TABLE IF NOT EXISTS notes (
 			id INTEGER PRIMARY KEY AUTOINCREMENT,
 			userid INTEGER,
 			content STRING,
 			created STRING
 		)`)
-		require.NoError(t, err)
+	require.NoError(t, err)
 
-		_, err = prepareConn.ExecContext(context.Background(),
-			`INSERT OR REPLACE INTO notes(userid, content, created) VALUES
+	_, err = tc.untraced.ExecContext(ctx,
+		`INSERT OR REPLACE INTO notes(userid, content, created) VALUES
 			(1, 'Hello, John. This is John. You are leaving a note for yourself. You are welcome and thank you.', datetime('now')),
 			(1, 'Hey, remember to mow the lawn.', datetime('now')),
 			(2, 'Reminder to submit that report by Thursday.', datetime('now')),
 			(2, 'Opportunities don''t happen, you create them.', datetime('now')),
 			(3, 'Pick up cabbage from the store on the way home.', datetime('now')),
 			(3, 'Review PR #1138', datetime('now')
 		)`)
-		require.NoError(t, err)
-	}()
+	require.NoError(t, err)
 
-	tc.DB, err = sql.Open("sqlite3", "file::memory:?cache=shared")
+	tc.DB, err = sql.Open(dn, dsn)
 	require.NoError(t, err)
 	t.Cleanup(func() {
 		assert.NoError(t, tc.DB.Close())