diff --git a/dialects/dialect.go b/dialects/dialect.go
index 35139817..4b9976f7 100644
--- a/dialects/dialect.go
+++ b/dialects/dialect.go
@@ -14,6 +14,7 @@ import (
 	"xorm.io/xorm/schemas"
 )
 
+// URI represents an uri to visit database
 type URI struct {
 	DBType  schemas.DBType
 	Proto   string
@@ -29,6 +30,13 @@ type URI struct {
 	Schema  string
 }
 
+// SetSchema set schema
+func (uri URI) SetSchema(schema string) {
+	if uri.DBType == schemas.POSTGRES {
+		uri.Schema = schema
+	}
+}
+
 // Dialect represents a kind of database
 type Dialect interface {
 	Init(*core.DB, *URI) error
diff --git a/engine.go b/engine.go
index 6dd4df3e..bc1d8b5f 100644
--- a/engine.go
+++ b/engine.go
@@ -1245,7 +1245,7 @@ func (engine *Engine) SetTZDatabase(tz *time.Location) {
 
 // SetSchema sets the schema of database
 func (engine *Engine) SetSchema(schema string) {
-	engine.dialect.URI().Schema = schema
+	engine.dialect.URI().SetSchema(schema)
 }
 
 // Unscoped always disable struct tag "deleted"