diff --git a/weed/filer/mysql/mysql_store.go b/weed/filer/mysql/mysql_store.go
index ccefa745e..423b01392 100644
--- a/weed/filer/mysql/mysql_store.go
+++ b/weed/filer/mysql/mysql_store.go
@@ -31,7 +31,7 @@ func (store *MysqlStore) GetName() string {
 func (store *MysqlStore) Initialize(configuration util.Configuration, prefix string) (err error) {
 	return store.initialize(
 		configuration.GetString(prefix+"upsertQuery"),
-		configuration.GetString(prefix+"enableUpsert"),
+		configuration.GetBool(prefix+"enableUpsert"),
 		configuration.GetString(prefix+"username"),
 		configuration.GetString(prefix+"password"),
 		configuration.GetString(prefix+"hostname"),
@@ -44,7 +44,7 @@ func (store *MysqlStore) Initialize(configuration util.Configuration, prefix str
 	)
 }
 
-func (store *MysqlStore) initialize(upsertQuery, enableUpsert, user, password, hostname string, port int, database string, maxIdle, maxOpen,
+func (store *MysqlStore) initialize(upsertQuery string, enableUpsert bool, user, password, hostname string, port int, database string, maxIdle, maxOpen,
 	maxLifetimeSeconds int, interpolateParams bool) (err error) {
 
 	store.SupportBucketTable = false
diff --git a/weed/filer/mysql2/mysql2_store.go b/weed/filer/mysql2/mysql2_store.go
index a4b55c7f4..071352111 100644
--- a/weed/filer/mysql2/mysql2_store.go
+++ b/weed/filer/mysql2/mysql2_store.go
@@ -33,7 +33,7 @@ func (store *MysqlStore2) Initialize(configuration util.Configuration, prefix st
 	return store.initialize(
 		configuration.GetString(prefix+"createTable"),
 		configuration.GetString(prefix+"upsertQuery"),
-		configuration.GetString(prefix+"enableUpsert"),
+		configuration.GetBool(prefix+"enableUpsert"),
 		configuration.GetString(prefix+"username"),
 		configuration.GetString(prefix+"password"),
 		configuration.GetString(prefix+"hostname"),
@@ -46,7 +46,7 @@ func (store *MysqlStore2) Initialize(configuration util.Configuration, prefix st
 	)
 }
 
-func (store *MysqlStore2) initialize(createTable, upsertQuery, enableUpsert, user, password, hostname string, port int, database string, maxIdle, maxOpen,
+func (store *MysqlStore2) initialize(createTable, upsertQuery string, enableUpsert bool, user, password, hostname string, port int, database string, maxIdle, maxOpen,
 	maxLifetimeSeconds int, interpolateParams bool) (err error) {
 
 	store.SupportBucketTable = true
diff --git a/weed/filer/postgres/postgres_store.go b/weed/filer/postgres/postgres_store.go
index 498c98f65..21b79d1fe 100644
--- a/weed/filer/postgres/postgres_store.go
+++ b/weed/filer/postgres/postgres_store.go
@@ -30,7 +30,7 @@ func (store *PostgresStore) GetName() string {
 func (store *PostgresStore) Initialize(configuration util.Configuration, prefix string) (err error) {
 	return store.initialize(
 		configuration.GetString(prefix+"upsertQuery"),
-		configuration.GetString(prefix+"enableUpsert"),
+		configuration.GetBool(prefix+"enableUpsert"),
 		configuration.GetString(prefix+"username"),
 		configuration.GetString(prefix+"password"),
 		configuration.GetString(prefix+"hostname"),
@@ -44,7 +44,7 @@ func (store *PostgresStore) Initialize(configuration util.Configuration, prefix
 	)
 }
 
-func (store *PostgresStore) initialize(upsertQuery, enableUpsert, user, password, hostname string, port int, database, schema, sslmode string, maxIdle, maxOpen, maxLifetimeSeconds int) (err error) {
+func (store *PostgresStore) initialize(upsertQuery string, enableUpsert bool, user, password, hostname string, port int, database, schema, sslmode string, maxIdle, maxOpen, maxLifetimeSeconds int) (err error) {
 
 	store.SupportBucketTable = false
 	if !enableUpsert {
diff --git a/weed/filer/postgres2/postgres2_store.go b/weed/filer/postgres2/postgres2_store.go
index b5947bb96..01fc4a869 100644
--- a/weed/filer/postgres2/postgres2_store.go
+++ b/weed/filer/postgres2/postgres2_store.go
@@ -33,7 +33,7 @@ func (store *PostgresStore2) Initialize(configuration util.Configuration, prefix
 	return store.initialize(
 		configuration.GetString(prefix+"createTable"),
 		configuration.GetString(prefix+"upsertQuery"),
-		configuration.GetString(prefix+"enableUpsert"),
+		configuration.GetBool(prefix+"enableUpsert"),
 		configuration.GetString(prefix+"username"),
 		configuration.GetString(prefix+"password"),
 		configuration.GetString(prefix+"hostname"),
@@ -47,7 +47,7 @@ func (store *PostgresStore2) Initialize(configuration util.Configuration, prefix
 	)
 }
 
-func (store *PostgresStore2) initialize(createTable, upsertQuery, enableUpsert, user, password, hostname string, port int, database, schema, sslmode string, maxIdle, maxOpen, maxLifetimeSeconds int) (err error) {
+func (store *PostgresStore2) initialize(createTable, upsertQuery string, enableUpsert bool, user, password, hostname string, port int, database, schema, sslmode string, maxIdle, maxOpen, maxLifetimeSeconds int) (err error) {
 
 	store.SupportBucketTable = true
 	if !enableUpsert {