fix issue: database connection pool does not work expectly

geg/database/orm/mysql/gdb_pool.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+    "gitee.com/johng/gf/g/database/gdb"
+    "time"
+)
+
+func main() {
+    gdb.AddDefaultConfigNode(gdb.ConfigNode {
+        Host             : "127.0.0.1",
+        Port             : "3306",
+        User             : "root",
+        Pass             : "12345678",
+        Name             : "test",
+        Type             : "mysql",
+        Role             : "master",
+        Charset          : "utf8",
+        MaxIdleConnCount : 10,
+        MaxOpenConnCount : 10,
+        MaxConnLifetime  : 10,
+    })
+    db, err := gdb.New()
+    if err != nil {
+        panic(err)
+    }
+    // 开启调试模式，以便于记录所有执行的SQL
+    db.SetDebug(true)
+
+    for {
+        for i := 0; i < 10; i++ {
+            go db.Table("user").All()
+        }
+        time.Sleep(time.Second)
+    }
+
+}

geg/database/orm/mysql/gdb_value.go

@@ -1,9 +1,8 @@
 package main
 
 import (
-    "gitee.com/johng/gf/g/database/gdb"
     "fmt"
-    "gitee.com/johng/gf/g/encoding/gparser"
+    "gitee.com/johng/gf/g/database/gdb"
 )
 
 func main() {
@@ -27,8 +26,5 @@ func main() {
     r, _ := db.Table("user").All()
     if r != nil {
         fmt.Println(r.ToList())
-        b, e := gparser.VarToJson(r.ToList())
-        fmt.Println(e)
-        fmt.Println(string(b))
     }
 }