Skip to content

fix(spark): reject MapType instead of emitting a childless Arrow List #8811

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
robert3005 merged 1 commit into from
Jul 17, 2026
+10 −4
Merged

fix(spark): reject MapType instead of emitting a childless Arrow List #8811

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 0 additions & 4 deletions java/vortex-spark/src/main/java/dev/vortex/spark/write/SparkToArrowSchema.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,6 @@
import org.apache.spark.sql.types.FloatType;
import org.apache.spark.sql.types.IntegerType;
import org.apache.spark.sql.types.LongType;
import org.apache.spark.sql.types.MapType;
import org.apache.spark.sql.types.ShortType;
import org.apache.spark.sql.types.StringType;
import org.apache.spark.sql.types.StructField;
Expand Down Expand Up @@ -125,9 +124,6 @@ private static ArrowType convertType(DataType sparkType) {
return new ArrowType.List();
} else if (sparkType instanceof StructType) {
return new ArrowType.Struct();
} else if (sparkType instanceof MapType) {
// Map is represented as List<Struct<key, value>> in Arrow
return new ArrowType.List();
} else {
throw new UnsupportedOperationException("Unsupported Spark type for Arrow conversion: "
+ sparkType.getClass().getName());
Expand Down
10 changes: 10 additions & 0 deletions java/vortex-spark/src/test/java/dev/vortex/spark/write/SparkToArrowSchemaTest.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -173,4 +173,14 @@ void unsupportedTypeIsRejected() {
assertThrows(UnsupportedOperationException.class, () -> SparkToArrowSchema.convert(schema));
assertTrue(e.getMessage().contains("CalendarIntervalType"));
}

@Test
@DisplayName("MapType is rejected rather than converted to a childless List")
void mapTypeIsRejected() {
StructType schema =
new StructType().add("m", DataTypes.createMapType(DataTypes.StringType, DataTypes.IntegerType));
UnsupportedOperationException e =
assertThrows(UnsupportedOperationException.class, () -> SparkToArrowSchema.convert(schema));
assertTrue(e.getMessage().contains("MapType"));
}
}
Loading