wgrusznis commented on issue #4306:
URL: https://github.com/apache/arrow-adbc/issues/4306#issuecomment-4406245949
alright I made some digging in Power BI connector (M query/PowerQuery
wrapper)
first finding: although I replaced csharp ADBC driver with my build still
what it outputs for UTF8_LCASE is ' STRING COLLATE UTF8_LCASE' -> but here
might be catch, PowerBI likes to revert some of the files when it noticed they
were altered.
but then I looked in the PBI databricks connector. in DatabricksAdbc.pqm
there is already code that handles type mappings
originalType -> adjustedType
i added one line in there
else if Text.StartsWith(connectorType, "STRING")
then "STRING"
build new version and this actually solves it.
So I think actually the Power Bi wrapper needs to be patched, and the ADBC
driver works as expected.
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