// Validate output columns
for (int column_guid : inline_proj.getOutputColumnGUIDs()) {
PlanColumn column = PlannerContext.singleton().get(column_guid);
assertNotNull("Missing PlanColumn [guid=" + column_guid + "]", column);
assertEquals(column_guid, column.guid());
// Check that only columns from the scanned table are there
String table_name = column.originTableName();
assertNotNull(table_name);
String column_name = column.originColumnName();