Forgot to reply-all.... Begin forwarded message:
> From: David Johnston <pol...@yahoo.com> > Date: December 19, 2011 8:09:36 EST > To: Marc Mamin <m.ma...@intershop.de> > Subject: Re: [GENERAL] consecutive analyze calls with different column lists. > > On Dec 19, 2011, at 8:04, "Marc Mamin" <m.ma...@intershop.de> wrote: > >> Hello, >> >> If I call analyze 2 times, e.g. >> >> analyze mytable (column_a, column_b); >> >> analyze mytable (column_a, column_c); >> >> >> >> then I will loose statisics on column_b. >> >> correct ? >> >> many thanks, >> >> Marc Mamin >> >> >> > Good question though my default assumption is that the statistics from the > first call would remain; otherwise the single column form of analyze becomes > pretty useless. > > In other words, it is impossible for a column to have no statistics, only old > ones. > > David J.
