Description

Test database access with MDB2GMS
Make multiple queries in one call, store in GDX file

Small Model of Type : GAMS

Category : GAMS Test library

Main file : mdb2gms1.gms

$title 'Test database access with MDB2GMS' (MDB2GMS1,SEQ=342)

$onText

Test database access with MDB2GMS
Make multiple queries in one call, store in GDX file

$offText

$callTool win32.msappavail Access
$if errorlevel 1 $abort.noError "No Access available"

$onEcho > cmd.txt
I=querytest.accdb
X=mdboutput.gdx

Q1=select distinct(year) from data
s1=year

Q2=select distinct(loc) from data
s2=loc

Q3=select distinct(prod) from data
s3=prd

Q4=select prod,loc,year,sales from data
p4=sales

Q5=select prod,loc,year,profit from data
p5=profit
$offEcho

$call mdb2gms @cmd.txt > %system.nullfile%
$if errorlevel 1 $exit Could not start Access

Scalar rc;
execute 'gdxdiff querytest.gdx mdboutput.gdx > %system.nullfile%';
rc=errorlevel;
display rc;
abort$(rc <> 0) 'generated gdx file is different';

set y 'years';
set loc 'locations';
set prd 'products';
parameter sales(prd,loc,y);
parameter profit(prd,loc,y);

$gdxIn 'mdboutput.gdx'
$load y=year loc prd sales profit


display sales;
display profit;