Added SetSingleQuoteEscaper for #1

Author: yangyin5127

sql.go

@@ -11,10 +11,11 @@ import (
 )
 
 var (
-	tmFmtZero   = "0000-00-00 00:00:00"
-	tmFmtWithMS = "2006-01-02 15:04:05.999"
-	escaper     = "'"
-	nullStr     = "NULL"
+	tmFmtZero          = "0000-00-00 00:00:00"
+	tmFmtWithMS        = "2006-01-02 15:04:05.999"
+	escaper            = "'"
+	nullStr            = "NULL"
+	singleQuoteEscaper = "\\"
 )
 
 //Escape escape the val for sql
@@ -69,7 +70,7 @@ func EscapeInLocation(val interface{}, loc *time.Location) string {
 		return fmt.Sprintf("%.6f", v)
 
 	case string:
-		return escaper + strings.Replace(v, escaper, "\\"+escaper, -1) + escaper
+		return escaper + strings.Replace(v, escaper, singleQuoteEscaper+escaper, -1) + escaper
 	default:
 		refValue := reflect.ValueOf(v)
 		if v == nil || !refValue.IsValid() {
@@ -93,7 +94,7 @@ func EscapeInLocation(val interface{}, loc *time.Location) string {
 		if err != nil {
 			return nullStr
 		}
-		return escaper + strings.Replace(string(stringifyData), escaper, "\\"+escaper, -1) + escaper
+		return escaper + strings.Replace(string(stringifyData), escaper, singleQuoteEscaper+escaper, -1) + escaper
 
 	}
 }
@@ -141,3 +142,8 @@ func FormatInLocation(query string, loc *time.Location, args ...interface{}) str
 	}
 	return sql.String()
 }
+
+//SetSingleQuoteEscaper set the singleQuoteEscaper
+func SetSingleQuoteEscaper(escaper string) {
+	singleQuoteEscaper = escaper
+}

sql_test.go

@@ -87,6 +87,24 @@ func TestStringEscape(t *testing.T) {
 	}
 }
 
+func TestStringCustomEscape(t *testing.T) {
+	s := "hello world"
+	SetSingleQuoteEscaper("'")
+	result := Escape(s)
+	if result != "'hello world'" {
+		t.Fatalf("escape string error")
+
+	}
+
+	s = "hello ' world"
+	result = Escape(s)
+	t.Logf("TestStringCustomEscape result: %s", result)
+	if result != "'hello '' world'" {
+		t.Fatalf("escape string error")
+
+	}
+}
+
 func TestBytesEscape(t *testing.T) {
 	s := []byte{0, 1, 254, 255}
 	result := Escape(s)