QlikView App Dev

[Anonymous]

Hello Community Folks,

I am trying to create a script that tests the database connection .I want variable value to be '0' when database connection fails so that variable value can be used to send email alerts about the connection issue.And I also want to create a qlik table with database name and sysdate as NULL if the db connection fails.Here is the script I created but when I give incorrect db creds in connection string, script is not entering IF block.Can some one correct my script.

Set ErrorMode=0;

Set NullInterpret = '';

LET vDBConnection = 1;

Trace 'Now Testing DBConnection';

OLEDB CONNECT TO [Provider=OraOLEDB.Oracle.1;Persist Security Info=True;User ID=xxxxx;Data Source=xxxx;Extended Properties=""] (XPassword is xxxxxx);

StreamHist:

SQL SELECT  'Databse Name' as DBNAME,SYSDATE FROM DUAL;

LET DBconnection_DATE =PEEK('SYSDATE',0,'StreamHist');

IF DBconnection_DATE = '' THEN

LET vDBConnection = 0;

StreamHist:

LOAD * INLINE [

    DBNAME, SYSDATE

    'Databse Name'

];

ENDIF

exit script;

[maxgro · Accepted solution]

maybe

Set ErrorMode=0;

Set NullInterpret = '';

LET vDBConnection = 1;

Trace 'Now Testing DBConnection';

OLEDB CONNECT TO [Provider=OraOLEDB.Oracle.1;Persist Security Info=True;User ID=xxxxx;Data Source=xxxx;Extended Properties=""] (XPassword is xxxxxx);

StreamHist:

SQL SELECT  'Databse Name' as DBNAME, SYSDATE, 'OK' as Status FROM DUAL;

LET DBconnection_DATE =PEEK('SYSDATE',0,'StreamHist');

IF len(trim(DBconnection_DATE)) = 0 THEN

  LET vDBConnection = 0;

  StreamHist:

  LOAD 'Database Name' as DBNAME, null() as SYSDATE, 'KO' as Status AutoGenerate 1;

ENDIF;

exit script;

[Anonymous]

maxgro‌: Thank you.It worked

[#4]

Hi, you could also use ScriptError variable.

It takes values different from 0, when an error occures.

Combining it with if condition you can set the value for your variable:

let ScriptError=Null();     //clear ScriptError variable in case some other error occured few lines above

command causing failure

if ScriptError>0 then

  let vDBConnection =0;

ELSE

  let vDBConnection =1;

ENDIF