I also did a quick check and just usingexec dbms_stats.set_column_stats(user,'table_name',colname=>'column_name',distcnt=> <num_distinct>);
will remove the histogram without removing the low_value and high_value. At 01:40 PM 3/16/2007, Alberto Dell'Era wrote:
On 3/16/07, Allen, Brandon <Brandon.Allen@xxxxxxxxxxx> wrote:Is there any faster way to remove histograms other than re-analyzing the table? I want to keep the existing table, index & column stats, but with only 1 bucket (i.e. no histograms).You might try the attached script, that reads the stats using dbms_stats.get_column_stats and re-sets them, minus the histogram, using dbms_stats.set_column_stats. I haven't fully tested it - it's only 10 minutes old, even if I have slightly modified for you another script I've used for quite some time - and the spool on 10.2.0.3 seems to confirmthat the histogram is, indeed, removed, while all the other statistics are preserved. I have also reset density to 1/num_distinct, that is the value you get if no histogram is collected.
Regards Wolfgang Breitling Centrex Consulting Corporationwww.centrexcc.com
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