Histogram Q

  • From: "Shivaswamy Raghunath" <shivaswamykr@xxxxxxxxx>
  • To: ORACLE-L <oracle-l@xxxxxxxxxxxxx>
  • Date: Wed, 13 Dec 2006 12:17:47 -0500

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

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