yuqi1129 commented on code in PR #12105:
URL: https://github.com/apache/gravitino/pull/12105#discussion_r3655222849
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spark-connector/spark-common/src/main/java/org/apache/gravitino/spark/connector/SparkTypeConverter.java:
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@@ -192,6 +192,11 @@ public DataType toSparkType(Type gravitinoType) {
return DataTypes.createStructType(fields);
} else if (gravitinoType instanceof Types.NullType) {
return DataTypes.NullType;
+ } else if (gravitinoType instanceof Types.ExternalType) {
+ // ExternalType represents types with no Gravitino-native mapping (e.g.
ClickHouse
+ // IPv4/IPv6, Doris LARGEINT/BITMAP, Glue unknown types). Map to
StringType so that
+ // tables containing these columns remain loadable in Spark. Users can
CAST as needed.
+ return DataTypes.StringType;
Review Comment:
Can you add some Spark IT to verify whether it works? I'm also curious about
how we handle gravitino external types and convert them to their inner type
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