Fix ClassCastException when reading MapType product column on Spark 4.x#177
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Fix ClassCastException when reading MapType product column on Spark 4.x#177
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Spark 4.x Parquet reader may represent MapType columns as a Seq of key-value Rows instead of a scala.collection.Map, causing Row.getJavaMap() to throw a ClassCastException. Replace all getJavaMap() calls on the product column with a shared Utils.getStringFromProductMap() helper that handles both representations. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Spark 4.x Parquet reader may represent MapType columns as a Seq of key-value Rows instead of a scala.collection.Map, causing Row.getJavaMap() to throw a ClassCastException. Replace all getJavaMap() calls on the product column with a shared Utils.getStringFromProductMap() helper that handles both representations.