fix fields

go.sum

@@ -6,8 +6,8 @@ github.com/apache/thrift v0.18.1 h1:lNhK/1nqjbwbiOPDBPFJVKxgDEGSepKuTh6OLiXW8kg=
 github.com/apache/thrift v0.18.1/go.mod h1:rdQn/dCcDKEWjjylUeueum4vQEjG2v8v2PqriUnbr+I=
 github.com/bradleyjkemp/cupaloy/v2 v2.8.0 h1:any4BmKE+jGIaMpnU8YgH/I2LPiLBufr6oMMlVBbn9M=
 github.com/bradleyjkemp/cupaloy/v2 v2.8.0/go.mod h1:bm7JXdkRd4BHJk9HpwqAI8BoAY1lps46Enkdqw6aRX0=
-github.com/cloudquery/arrow/go/v13 v13.0.0-20230526062000-b3fdc24ed8d6 h1:pXLimp7SeA1AiRYANtNto/uJu5aMjeXC8zeMS4BV3dg=
-github.com/cloudquery/arrow/go/v13 v13.0.0-20230526062000-b3fdc24ed8d6/go.mod h1:/XatdE3kDIBqZKhZ7OBUHwP2jaASDFZHqF4puOWM8po=
+github.com/cloudquery/arrow/go/v13 v13.0.0-20230531165153-1d8a95e9920c h1:C2tXw2EgIZ/I/Z0Wt7EjFrcQYQ7QDL7jwp6kyWMLLb8=
+github.com/cloudquery/arrow/go/v13 v13.0.0-20230531165153-1d8a95e9920c/go.mod h1:/XatdE3kDIBqZKhZ7OBUHwP2jaASDFZHqF4puOWM8po=
 github.com/cloudquery/plugin-pb-go v1.0.8 h1:wn3GXhcNItcP+6wUUZuzUFbvdL59liKBO37/izMi+FQ=
 github.com/cloudquery/plugin-pb-go v1.0.8/go.mod h1:vAGA27psem7ZZNAY4a3S9TKuA/JDQWstjKcHPJX91Mc=
 github.com/cloudquery/plugin-sdk/v3 v3.7.0 h1:aRazh17V+6AA00vmxPZRv2rudNEerSd3kqbyffRl6SA=

parquet/write.go

@@ -38,10 +38,12 @@ func convertSchema(sc *arrow.Schema) *arrow.Schema {
 }
 
 func convertFieldTypes(fields []arrow.Field) []arrow.Field {
-	for i := range fields {
-		fields[i].Type = transformDataType(fields[i].Type)
+	newFields := make([]arrow.Field, len(fields))
+	copy(newFields, fields)
+	for i := range newFields {
+		newFields[i].Type = transformDataType(newFields[i].Type)
 	}
-	return fields
+	return newFields
 }
 
 func transformDataType(t arrow.DataType) arrow.DataType {