fix #200: PostgreSQL InsertIgnoreInto with subquery doesn't append ON CONFLICT DO NOTHING

insert.go

@@ -197,10 +197,7 @@ func (ib *InsertBuilder) BuildWithFlavor(flavor Flavor, initialArg ...interface{
 		buf.WriteString(ib.sbHolder)
 
 		ib.injection.WriteTo(buf, insertMarkerAfterSelect)
-		return ib.args.CompileWithFlavor(buf.String(), flavor, initialArg...)
-	}
-
-	if len(ib.values) > 0 {
+	} else if len(ib.values) > 0 {
 		buf.WriteLeadingString("VALUES ")
 		values := make([]string, 0, len(ib.values))
 

insert_test.go

@@ -305,3 +305,15 @@ func TestInsertBuilderGetFlavor(t *testing.T) {
 	flavor = ibClick.Flavor()
 	a.Equal(ClickHouse, flavor)
 }
+
+func TestIssue200(t *testing.T) {
+	a := assert.New(t)
+	ib := PostgreSQL.NewInsertBuilder()
+	ib.InsertIgnoreInto("table")
+	ib.Cols("data")
+	sb := ib.Select("id", "data").From("table")
+	sb.Where(sb.Equal("id", 1))
+
+	query, _ := ib.Build()
+	a.Equal(query, "INSERT INTO table (data) SELECT id, data FROM table WHERE id = $1 ON CONFLICT DO NOTHING")
+}