Tableau: snowflake columns should not blindly lowercased if ingest_tables_external is set to true

[alexs-101]

The tableau plugin has the snowflake related crutch in the function

def get_upstream_columns_of_fields_in_datasource(

that blindly lowercasing snowflake table column names

If we ingest metedata from Tableau using ingest_tables_external: true, so the snowflake tables schema comes from Tableau metadata, the linage is not shown in UI due to case sensitivity of the linage links. Thanx to the blindly applied snowflake crutch lowercasing column names.

If ingest_tables_external is enabled, we should not lowercase column names

The fix is by the link
#9838

[github-actions]

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