chore: add database name interface

sequel/model.go

@@ -2,6 +2,9 @@ package sequel
 
 import "database/sql/driver"
 
+// To specific the database, this is optional
+type Database struct{}
+
 // For rename table name
 type Table struct{}
 
@@ -18,6 +21,10 @@ type DuplicateKeyer interface {
 	OnDuplicateKey() string
 }
 
+type Databaser interface {
+	DatabaseName() string
+}
+
 type Tabler interface {
 	TableName() string
 }