diff --git a/core/entity/database.go b/core/entity/database.go
new file mode 100644
index 00000000..e0033781
--- /dev/null
+++ b/core/entity/database.go
@@ -0,0 +1,25 @@
+package entity
+
+type DatabaseMetadata struct {
+	Databases []Database `json:"databases"`
+}
+
+type Database struct {
+	Name   string          `json:"name"`
+	Tables []DatabaseTable `json:"tables"`
+}
+
+type DatabaseTable struct {
+	Name    string           `json:"name"`
+	Columns []DatabaseColumn `json:"columns"`
+}
+
+type DatabaseColumn struct {
+	Name     string           `json:"name"`
+	Type     string           `json:"type"`
+	Null     bool             `json:"null,omitempty"`
+	Key      string           `json:"key,omitempty"`
+	Default  string           `json:"default,omitempty"`
+	Extra    string           `json:"extra,omitempty"`
+	Children []DatabaseColumn `json:"children,omitempty"`
+}