From 53900fb4f0eb34195dad7e0c70315a9cf81dacb8 Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Mon, 20 Mar 2017 23:23:24 +0900
Subject: [PATCH] return nil when last error is SQLITE_OK

---
 sqlite3.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sqlite3.go b/sqlite3.go
index f363549..5df6c8b 100644
--- a/sqlite3.go
+++ b/sqlite3.go
@@ -400,8 +400,12 @@ func (c *SQLiteConn) AutoCommit() bool {
 }
 
 func (c *SQLiteConn) lastError() Error {
+	rv := C.sqlite3_errcode(c.db)
+	if rv == C.SQLITE_OK {
+		return nil
+	}
 	return Error{
-		Code:         ErrNo(C.sqlite3_errcode(c.db)),
+		Code:         ErrNo(rv),
 		ExtendedCode: ErrNoExtended(C.sqlite3_extended_errcode(c.db)),
 		err:          C.GoString(C.sqlite3_errmsg(c.db)),
 	}