Hello Listers. When I collect statistics of a table using (dbms_stats.gather_table_stats) method_opt => 'for all columns size 1', I get the table details in user_tab_histograms for the table. So, technically the table has a histogram. But this is a histogram with ONE bucket. So, it is NOT a histogram. CBO will not treat this as a case of table with histogram. Am I not right in this conclusion? Can some one confirm? Thanks, Shiva