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gnumarco Frequent Visitor
Frequent Visitor

ODBC Problem with mongoDB BI connector (MySQL)

Hi everybody.

Since 1 month, I am not able to load more than 500,000 (I have 590,000 more or less) lines from MongoDB using the ODBC connector. Let me explain: I use the lastest release of MongoDB 3.6 and I have installed the MongoDB BI connector, that means, I use the ODBC option of PowerBI to get data, as the Mongo BI connector fakes a MySQL ODBC connection.

The last 4 months, all went smoothly and I was able to load my 4,000,000 lines from MongoDB, but this month, the Refresh Data gives me an error (ODBC Driver Error) at the end of the import. That is to say, it reads all the lines, but when it finishes, it just crashes.

 

The Error is:

Failed to save modifications to the server. Error returned: 'OLE DB or ODBC error[DataSource.Error] ODBC: ERROR [22018][MySQL][ODBC 5.3 (a) Driver][mysqld-5.7.12 mongosqld v2.4.1].'.

 

Digging a bit, the ODBC error 22018 seems to be 2invalid character value for cast specification"...

The very strange thing is that when I try this using Excel: conecting to the exact same DSN, importing the exact same table, it reads the 590,000 lines without problem.

I have tested in PowerBI, it works for 480,000 lines but crashes for 590,000.

I have no idea about what could be the problem, and why it worked for 4,000,000 the last months.

 

Considering the type of the error, I don't really know if the number of lines is the cause of the problem...

 

Thanks!

1 ACCEPTED SOLUTION

Accepted Solutions
gnumarco Frequent Visitor
Frequent Visitor

Re: ODBC Problem with mongoDB BI connector (MySQL)

Hi Lydia.

Indeed, I found the solution. And it is related to character encoding.

MySQL provides 2 ODBC drivers, ANSI driver and the Unicode driver. In the MongoDB documentiation, they advise to use the ANSI driver, but this is what provoques the error.

It seems to work fine with the Unicode Driver.

 

Thanks for your answer!

3 REPLIES 3
Moderator v-yuezhe-msft
Moderator

Re: ODBC Problem with mongoDB BI connector (MySQL)

@gnumarco,

The above error is related to collation on MongoDB, what is the collation of your query? Do you have any foreign characters in the MongoDB data source?

Regards,
Lydia

Community Support Team _ Lydia Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
gnumarco Frequent Visitor
Frequent Visitor

Re: ODBC Problem with mongoDB BI connector (MySQL)

Hi Lydia.

Indeed, I found the solution. And it is related to character encoding.

MySQL provides 2 ODBC drivers, ANSI driver and the Unicode driver. In the MongoDB documentiation, they advise to use the ANSI driver, but this is what provoques the error.

It seems to work fine with the Unicode Driver.

 

Thanks for your answer!

Highlighted
Moderator v-yuezhe-msft
Moderator

Re: ODBC Problem with mongoDB BI connector (MySQL)

@gnumarco,

Glad to hear the issue is solved, you can accept your reply as answer to close this thread.

Regards,
Lydia

Community Support Team _ Lydia Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.