Merge pull request #1238 from oracle-devrel/uschwinn-patch-31

Create fastlookup.sql

Author: JesusGitHubOracle

data-platform/core-converged-db/fast-ingest-lookup/files/fastlookup.sql

@@ -0,0 +1,70 @@
+-- this script demonstrates the fast lookup usage in Oracle Database
+-- database release could be before 23ai 
+
+set feedback on
+set echo on
+  
+-- configure memmoptimize pool in container ROOT
+ALTER SYSTEM SET MEMOPTIMIZE_POOL_SIZE = 500M SCOPE=SPFILE;
+
+-- restart the database
+startup force
+
+-- check the setting
+
+SHOW PARAMETER MEMOPTIMIZE_POOL_SIZE
+
+pause
+-- privileges for SH to monitor execution plans 
+grant select on v_$session to sh;
+grant select on v_$sql_plan to sh;
+grant select on v_$sql_plan_statistics_all to sh;
+grant select on v_$sql to sh;
+grant read on v_$sql to sh;
+
+-- connect as SH user in PDB
+connect sh/&password@&pdb
+
+-- drop table sales_tab
+drop table sales_tab;
+
+-- create table SALES_TAB
+create table sh.sales_tab (
+sales_id   NUMBER(6) primary key,
+prod_id       NUMBER(6) not null,
+cust_id       NUMBER not null,
+time_id       DATE not null,
+quantity_sold NUMBER(3) not null,
+amount_sold   NUMBER(10,2) not null);
+
+-- insert data
+insert into sh.sales_tab (sales_id,prod_id, cust_id, time_id, quantity_sold, amount_sold)
+select rownum, PROD_ID, CUST_ID, TIME_ID, QUANTITY_SOLD,  AMOUNT_SOLD from sh.sales;
+
+select count(*) from sales_tab;
+
+-- Now let's enable the feature for the data stored in SH.SALES_TAB.
+ALTER TABLE SH.SALES_TAB MEMOPTIMIZE FOR READ;
+
+-- gather statistics
+execute dbms_stats.gather_table_stats('SH','SALES_TAB');
+
+-- populate
+execute dbms_memoptimize.populate(schema_name=>'SH',table_name=>'SALES_TAB');
+
+pause
+-- lets check with two queries
+set linesize window
+
+-- this one will use memoptimize rowstore
+select * from sh.sales_tab where sales_id=5;
+
+-- check the execution plan
+select * from dbms_xplan.display_cursor();
+
+pause
+-- this one won't work
+select * from sh.sales_tab where sales_id<2;
+
+-- check the execution plan
+select * from dbms_xplan.display_cursor();