Skip to main content

How to analyze statistics on local temporary tables in vertica

  • September 20, 2016
  • 4 replies
  • 19 views

Vinnu

How to analyze statistics on local temporary tables in vertica ?

Vertica Database Version - 7.2.3

4 replies

SruthiA
Forum|alt.badge.img+1
  • Participating Frequently
  • September 21, 2016

Temporary tables are session scoped. Why do you want to analyze statistics on them?


Aadu
  • New Participant
  • September 22, 2016

Hi Sruthi, 

 

Temporary tables that are getting created are huge in size and are further used in joins in the same session. Un analyzed or no statistics are creating wrong query plans.

 

I can now analyze them. I was passing wrong command to analyze them.


Adrian_Oprea_1
Forum|alt.badge.img+1
  • Participating Frequently
  • September 22, 2016

 Hi ,

 

ANALYZE_STATISTICS is supported on local temporary tables and you must create the table with the option ON COMMIT PRESERVE ROWS.

 

 


Adrian_Oprea_1
Forum|alt.badge.img+1
  • Participating Frequently
  • September 22, 2016

 Make sure you also watch the sort key as well