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Resolved PB2019 R2 - null reference at execute a SP

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  1. Kieu Parrish
    Kieu Parrish
  2. PowerBuilder
  3. Tuesday, 16 February 2021 16:03 PM UTC

Hello,

We are using PB 2019 R2 Build 2328 and have been dealing with an issue relating to execute stored procedure. 

We are using the nvo like below:

 

nvo_sqlcadb_log DBapplogs
DBapplogs = CREATE nvo_sqlcadb_applogs

DECLARE addlog procedure for SP_Add_Log 

@log = :ls_log

using DBapplogs.sqlcadb;

execute pbsp_update_log; ==> WE ARE GETTING NULL REFERENCE AT THIS LINE 

If DBapplogs.sqlcadb.SQLCode = -1 then 

  // show error 

end If 

The constructor() event of the "nvo_sqlcadb_log" looks like below:

sqlcaDB = create transaction

Then set sqlca parameters ... 

 

Since the issue "execute pbsp_update_log; ==> WE ARE GETTING NULL REFERENCE AT THIS LINE " happened , we've added a check for transaction "DBapplogs.sqlcadb" -> it showed this transaction is not valid . But it does not happen all time. ( this log is run all the time and every few days , the error "NULL REFERENCE AT "execute pbsp_update_log;" " happens )

Could you guys help me how to resolve this issue ? 

Thank you very much!

 

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Folder SharedExtensions in PB install folder
Accepted Answer
Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Wednesday, 17 February 2021 18:05 PM UTC
  2. PowerBuilder
  3. # Permalink

Hi Kieu;

  Sounds like the odd time the Transaction object is not getting created properly. I would add some IsValid() and DBHandle() commands into the code to trap a bad TO or a failed "Connect;".

HTH

Regards ... Chris

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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Tuesday, 16 February 2021 16:56 PM UTC
  2. PowerBuilder
  3. # 1

Hi Kieu;

  Can you tell us ...

1) DBMS version & build being used

2) DB Client version & build being used

3) How is your App connecting to DBMS ( SQLCA.DBMS = "???") ?

4) How is the SP being called (SP based DW, RPC, Inline SQL)?

5) Have you run an SQL Trace?

Regards ... Chris

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Kieu Parrish
  1. Kieu Parrish
  2. Wednesday, 17 February 2021 17:41 PM UTC
Thank you, Chris!

Below is the information that I can give :



1) DBMS version & build being used

--> SNC - most current for PB2019 R2



2) DB Client version & build being used

--> 2012 Native Client



3) How is your App connecting to DBMS ( SQLCA.DBMS = "???") ?

--> DBMS=SNC

sqlcaDB.dbms = [xxxxxx]

sqlcaDB.database = [databasename]

sqlcaDB.logid = [logid]

sqlcaDB.logpass = [logpass]

sqlcaDB.servername = [servername]

sqlcaDB.DBParm = "Host = '" + [computerinfo] + "'" + "Database=[databasename],TrimSpaces=1"



4) How is the SP being called (SP based DW, RPC, Inline SQL)?

The Stored Procedure is called using the PB DECLARE/Using sqlcadb/Execute statements



5) SQL Trace -> Could you give some instructions on how to do the SQL Trace ?



Thanks again!



  1. Helpful
John Fauss
  1. John Fauss
  2. Wednesday, 17 February 2021 21:02 PM UTC
To enable the SQL Trace, preface the normal DBMS property value of the transaction object with the word "TRACE". In your case, sqlcadb.DBMS = 'SNC would become sqlcadb.DBMS = 'TRACE SNC'. Note this also is possible from a database profile in the IDE by checking the "Generate Trace" checkbox near the bottom of the "Connection" tab page when editing a DB Profile (you can see the effect in the "Preview" tab).
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