Qlik OBCD Error: Arithmetic operation resulted in an overflow

[Sebastian_Dec]

Hi, I have in error when I connect to table (other table from data base was ok).

I forwarded it to people from the data source following the example of this topic: link
In response, they asked me to prove that it was not a mistake on Qlik's part - how could I prove it?

My Qlik version is: May 2024 Patch 3 / qliksenserver 14.187.7

In a similar period to the error occurred, we upgraded Qlik from version 2022, but I doubt that upgrading the version caused the problem because we have several connections, a lot of tables and everything except this one works fine.

[marcus_sommer · Accepted solution]

Comparing the queries and the tables from the working ones against the failed one may give some valuable hints which fields/processing/data doesn't fit to the specified data-types. Further reducing the load to 1 / 3 / 10 / n fields and/or rows should be also return insights. Another approach could be to enable or to extend the logging of the driver and the data-base to get a more detailed error-message. 

[Sebastian_Dec]

Thx @marcus_sommer , I did some tests according to your suggestion:

1. After commenting out the "DESCRIPTION" column, the table loads normally, so the error is in the "DESCRIPTION" column

LIB CONNECT TO 'Promocje_Prod';

PL_PROMOTION:
LOAD
ID as ID,
PROMOTION_NAME as [Nazwa promocji],
BEGIN_DATE as [Data początkowa],
END_DATE as [Data końcowa],
PROFIT_ID as ProfitId,
// DESCRIPTION as [Opis promocji],
PROMOTION_STATUS as [Status promocji],
ENTITY_DISTRIBUTION_STATUS as [Status dystrybucji],
SEGMENT_GUID as [Guid segmentu],
TAGS as [Tag lojalność];

[PL_PROMOTION]:
SELECT
"ID",
"PROMOTION_NAME",
"BEGIN_DATE",
"END_DATE",
"PROFIT_ID",
// "DESCRIPTION",
"PROMOTION_STATUS",
"ENTITY_DISTRIBUTION_STATUS",
"SEGMENT_GUID",
"TAGS"
FROM "LC_MD_VIEW"."PL_PROMOTION";

2. any loading of the first lines results in errors:

SQL SELECT
"DESCRIPTION"
FROM "LC_MD_VIEW"."PL_PROMOTION"
WHERE ROWNUM <= 1;

The following error occurred:

Unable to get column information for the fields that are used in the query. Please make sure that SQL statement used produces a result set or use !EXECUTE_NON_SELECT_QUERY keyword.

The error occurred here:

SQL SELECT "DESCRIPTION" FROM "LC_MD_VIEW"."PL_PROMOTION" WHERE ROWNUM <= 1

3. Only converting the data into shorter text helps:

SQL SELECT
CAST("DESCRIPTION" AS VARCHAR(1000)) AS "DESCRIPTION"
FROM "LC_MD_VIEW"."PL_PROMOTION";

Although none of the texts exceeds 1000 characters...

I'm still waiting for a response from the people who manage this database, but this data is very helpful

[marcus_sommer]

I think it hints for a driver-issue which couldn't handle the data-type of this field properly (maybe a newer sub-type as defined within the driver) and/or there may an issue with the specified/available char-set because there are various special-chars included. Struggling with the driver could be quite exhausting - therefore any kind of cast-statement within the query might be more practically.

[Sebastian_Dec · Accepted solution]

Similar topics with explanation:

Solved: CLOB conversion to varchar - Qlik Community - 1988276

Qlik Replicate Transformation: Source Lookup - CLO... - Qlik Community - 1987353

Fast fix:

Converting the data into shorter text helps:

SQL SELECT
CAST("DESCRIPTION" AS VARCHAR(1000)) AS "DESCRIPTION"
FROM "LC_MD_VIEW"."PL_PROMOTION";