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Oracle 8 Tips  

by Burleson Consulting

The Data Warehouse Development Life Cycle

Oracle Features for the Data Warehouse

Determining when to rebuild indexes

Listing 8.6 This SQL is generated from running id1.sql

Rem © 1997 by Donald K. Burleson
rem id4.sql

analyze index DON.SHL_EK_TRUCK_LINK_NUM validate structure;

@id3.sql;


analyze index DON.SHL_UK_FACT1_ID_SRC_CD_LOB validate structure;

@id3.sql;


analyze index DON.PURCH_UNIT_PK validate structure;

@id3.sql;



Listing 8.7 This SQL*Plus script generates the clustering report

Rem © 1997 by Donald K. Burleson
rem id5.sql - This creates the unbalanced index report and the rebuild syntax
set pagesize 60;
set linesize 100;
set echo off;
set feedback off;
set heading off;

column c1 format a18;
column c2 format 9,999,999;
column c3 format 9,999,999;
column c4 format 999,999;
column c5 format 99,999;
column c6 format 9,999;

spool idx_report.lst;

prompt
prompt
prompt ' # rep dist. # deleted blk s
prompt Index keys keys leaf rows Height per s
prompt -------------------- ------ ----- -------- ------ -----

select distinct
name c1,
most_repeated_key c2,
distinct_keys c3,
del_lf_Rows c4,
height c5,
blks_gets_per_access c6
from temp_stats
where
height > 3
or
del_lf_rows > 10
order by name;

spool off;

spool id6.sql;


This is an excerpt from "High Performance Data Warehousing", copyright 1997. To learn more about Oracle, try "Oracle Tuning: The Definitive Reference", by Donald K. Burleson.  You can buy it direct from the publisher at 30% off here:
http://www.rampant-books.com/book_1002_oracle_tuning_definitive_reference_2nd_ed.htm

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