diff --git a/pkg/merge/merge.go b/pkg/merge/merge.go
index 376eb7f..1ca6eca 100644
--- a/pkg/merge/merge.go
+++ b/pkg/merge/merge.go
@@ -487,10 +487,6 @@ func extractTypeParts(col *models.Column) (baseType string, length, precision, s
 	return typeName, length, precision, scale
 }
 
-func normalizeType(value string) string {
-	return strings.ToLower(strings.TrimSpace(value))
-}
-
 func describeColumnType(col *models.Column) string {
 	if col == nil {
 		return ""
diff --git a/pkg/pgsql/datatypes.go b/pkg/pgsql/datatypes.go
index 02e857d..cbdb380 100644
--- a/pkg/pgsql/datatypes.go
+++ b/pkg/pgsql/datatypes.go
@@ -171,7 +171,7 @@ var knownPGBaseTypes = map[string]struct{}{
 	"numeric": {}, "real": {}, "double precision": {}, "money": {},
 	"varchar": {}, "char": {}, "text": {}, "citext": {},
 	"boolean": {},
-	"date": {}, "time": {}, "timetz": {}, "timestamp": {}, "timestamptz": {}, "interval": {},
+	"date":    {}, "time": {}, "timetz": {}, "timestamp": {}, "timestamptz": {}, "interval": {},
 	"uuid": {}, "json": {}, "jsonb": {}, "bytea": {},
 	"inet": {}, "cidr": {}, "macaddr": {}, "xml": {},
 }