From 4a2209a1b4f9c94ea2e7e8448f8d03c8fd6ccb93 Mon Sep 17 00:00:00 2001
From: Aliaksandr Mianzhynski <amenzhinsky@gmail.com>
Date: Wed, 23 Jun 2021 16:30:39 +0300
Subject: [PATCH] Don't allocate buffer when tx opts are empty

---
 tx.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tx.go b/tx.go
index 8f3178cb..7a296f4f 100644
--- a/tx.go
+++ b/tx.go
@@ -42,7 +42,12 @@ type TxOptions struct {
 	DeferrableMode TxDeferrableMode
 }
 
+var emptyTxOptions TxOptions
+
 func (txOptions TxOptions) beginSQL() string {
+	if txOptions == emptyTxOptions {
+		return "begin"
+	}
 	buf := &bytes.Buffer{}
 	buf.WriteString("begin")
 	if txOptions.IsoLevel != "" {