diff --git a/build/nogo_config.json b/build/nogo_config.json
index 18f29132f961b..576d7166d5bc1 100644
--- a/build/nogo_config.json
+++ b/build/nogo_config.json
@@ -512,7 +512,6 @@
       "pkg/parser/goyacc/": "ignore goyacc code",
       "pkg/parser/ast/": "ignore parser/ast code",
       "pkg/parser/test_driver/": "ignore parser/test_driver code",
-      "dumpling/export/sql_type.go": "please fix it",
       ".*_test\\.go$": "ignore generated code",
       ".*_generated\\.go$": "ignore generated code",
       ".*mock.go$": "ignore generated code",
diff --git a/dumpling/export/sql_type.go b/dumpling/export/sql_type.go
index 45d544fa7ed71..9d3353632578c 100644
--- a/dumpling/export/sql_type.go
+++ b/dumpling/export/sql_type.go
@@ -106,8 +106,8 @@ func escapeBackslashSQL(s []byte, bf *bytes.Buffer) {
 func escapeBackslashCSV(s []byte, bf *bytes.Buffer, opt *csvOption) {
 	var (
 		escape  byte
-		last         = 0
-		specCmt byte = 0
+		last    int
+		specCmt byte
 	)
 	if len(opt.delimiter) > 0 {
 		specCmt = opt.delimiter[0] // if csv has a delimiter, we should use backslash to comment the delimiter in field value