Table in memory using plsql

Question

I have to convert a table and the plsql will check a small table a lot of times , I'd like to put this table in memory and do this check using variables,
I trying to use record type but I have to find a record using 2 columns and I can not able to use the EXISTS,
I'd like to have a table cache, and find a row in this cache ( using 2 columns as key ) ,
Any help I appreciate .

Answer 1

A multilevel associative array may help you. Here is an example.
set serveroutput on
declare
type row_type is record ( col_1 number, col_2 number );
type inner_aa_type is table of row_type index by varchar2(10) ;
type outer_aa_type is table of inner_aa_type index by varchar2(10) ;
v_row row_type ;
v_aa        outer_aa_type ;
begin
v_row.col_1 := 10 ;
v_row.col_2 := 100 ;
v_aa('A')('1') := v_row ;
v_row.col_1 := 20 ;
v_row.col_2 := 200 ;
v_aa('A')('2') := v_row ;
dbms_output.put_line ( v_aa('A')('1').col_1 );
dbms_output.put_line ( v_aa('A')('1').col_2 );
dbms_output.put_line ( v_aa('A')('2').col_1 );
dbms_output.put_line ( v_aa('A')('2').col_2 );
if ( v_aa.exists('A') and v_aa('A').exists('1') )
then dbms_output.put_line( 'First test is true' );
end if;
if not ( v_aa.exists('A') and v_aa('A').exists('5') )
then dbms_output.put_line( 'Second test is false' );
end if;
if not ( v_aa.exists('X') and v_aa('X').exists('5') )
then dbms_output.put_line( 'Third test is false' );
end if;
end ;
10
100
20
200
First test is true
Second test is false
Third test is false
PL/SQL procedure successfully completed.--
Joe Fuda
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