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knutmerket avatar knutmerket commented on September 24, 2024

Oh there's no other parameters involved in case that wasn't clear. Only submitting the query and connection to the read_database method

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alexander-beedie avatar alexander-beedie commented on September 24, 2024

Could you provide some additional information?

Specifically, the following might be helpful:

  • What exactly is the connection - Denodo's own driver, or something else?
  • What is the schema of the table you're querying?
  • Which column does the failing value "Valutakurs: 11,4760" come from?
  • Have you tried providing an ODBC connection string instead?
    This would then use the fast "arrow-odbc" engine (which you can pip install).
    # connecting to an ODBC source (using arrow-odbc)
    df = pl.read_database(
        query = "SELECT * FROM tbl",
        connection = "Driver={PostgreSQL};Server=localhost;Port=5432;Database=test;Uid=usr;Pwd=",
    )
  • Note that you can likely provide a schema_overrides={"column": dtype} entry for the problematic column.

I'll expose the parameter referenced in the error shortly, but ideally you should be able to avoid it 🤔

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