add console & example

tools/goctl/model/sql/example/main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"github.com/tal-tech/go-zero/core/lang"
+	"github.com/tal-tech/go-zero/tools/goctl/model/sql/gen"
+)
+
+// go run .
+func main() {
+	// generating with cache
+	withCacheGenerator := gen.NewDefaultGenerator("./test.sql", "./withcachemodel")
+	lang.Must(withCacheGenerator.Start(true))
+
+	// generating without cache
+	withoutGenerator := gen.NewDefaultGenerator("./test.sql", "./withoutcachemodel")
+	lang.Must(withoutGenerator.Start(false))
+}