Only have a single Begin transaction method

pool/conn.go

@@ -61,8 +61,8 @@ func (c *Conn) QueryRow(ctx context.Context, sql string, args ...interface{}) pg
 	return c.Conn().QueryRow(ctx, sql, args...)
 }
 
-func (c *Conn) Begin() (*pgx.Tx, error) {
-	return c.Conn().Begin()
+func (c *Conn) Begin(ctx context.Context, txOptions *pgx.TxOptions) (*pgx.Tx, error) {
+	return c.Conn().Begin(ctx, txOptions)
 }
 
 func (c *Conn) Conn() *pgx.Conn {

pool/pool.go

@@ -127,13 +127,13 @@ func (p *Pool) QueryRow(ctx context.Context, sql string, args ...interface{}) pg
 	return &poolRow{r: row, c: c}
 }
 
-func (p *Pool) Begin() (*Tx, error) {
-	c, err := p.Acquire(context.Background())
+func (p *Pool) Begin(ctx context.Context, txOptions *pgx.TxOptions) (*Tx, error) {
+	c, err := p.Acquire(ctx)
 	if err != nil {
 		return nil, err
 	}
 
-	t, err := c.Begin()
+	t, err := c.Begin(ctx, txOptions)
 	if err != nil {
 		return nil, err
 	}

pool/tx_test.go

@@ -14,7 +14,7 @@ func TestTxExec(t *testing.T) {
 	require.NoError(t, err)
 	defer pool.Close()
 
-	tx, err := pool.Begin()
+	tx, err := pool.Begin(context.Background(), nil)
 	require.NoError(t, err)
 	defer tx.Rollback(context.Background())
 
@@ -26,7 +26,7 @@ func TestTxQuery(t *testing.T) {
 	require.NoError(t, err)
 	defer pool.Close()
 
-	tx, err := pool.Begin()
+	tx, err := pool.Begin(context.Background(), nil)
 	require.NoError(t, err)
 	defer tx.Rollback(context.Background())
 
@@ -38,7 +38,7 @@ func TestTxQueryRow(t *testing.T) {
 	require.NoError(t, err)
 	defer pool.Close()
 
-	tx, err := pool.Begin()
+	tx, err := pool.Begin(context.Background(), nil)
 	require.NoError(t, err)
 	defer tx.Rollback(context.Background())