Github user dhunziker commented on the issue: https://github.com/apache/spark/pull/16812 That would remain a workaround though. The uniVocity parser for boolean supports this as well: https://github.com/uniVocity/univocity-parsers/blob/master/src/main/java/com/univocity/parsers/conversions/BooleanConversion.java. It's also been raised as a ticket against the original spark-csv so there seems to be at least some interest. Personally, I think this can help a lot when integrating Spark with other systems (i.e. some DB exports where modeling booleans as flags is common) similar to having ways of specifying the format of a date or null value.
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