Hi all, I would like to see the intermediate result (i.e., MAL instructions) after each optimizer step in a optimizer pipeline. So I searched Monetdb's documents and found the following sentence in https://www.monetdb.org/Documentation/Cookbooks/SQLrecipes/OptimizerPipeline... : "Alternatively, the SQL DEBUG statement modifier in combination with the 'o' command provides access to the intermediate optimizer results." I cannot figure out what this sentence means. What I know about SQL DEBUG statement is to use "debug <SQL statement>" to enter the debug mode and iterate through each (final) MAL instruction one by one. How could I use 'o' command to access intermediate optimizer results? I am using MonetDB 11.21.17 (JUL2015 SP3) and my environment is Ubuntu14.04. Thank you very much. Best regards, XU Wenjian