luoyuxia commented on code in PR #20988:
URL: https://github.com/apache/flink/pull/20988#discussion_r999205523
##########
flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/data/conversion/ArrayObjectArrayConverter.java:
##########
@@ -100,7 +100,6 @@ public E[] toExternal(ArrayData internal) {
if (genericArray.isPrimitiveArray()) {
return genericToJavaArrayConverter.convert((GenericArrayData)
internal);
}
- return (E[]) genericArray.toObjectArray();
Review Comment:
I'm wondering whether it's a good idea to always remove this line and then
fall back to `toJavaArray(internal)`.
From my side, `(E[]) genericArray.toObjectArray()` seems a optimization
compared to `toJavaArray(internal)`.
In the vectorized way, it should fall to `toJavaArray(internal)`,
otherwise, it will fail.
But in the non-vectorized way, everything is ok even though we don't remove
this line.
For example, if we try to make array read to be non-vectorized by modifying
the method `isVectorizationUnsupported`. The test will pass if we don't remove
this line.
##########
flink-connectors/flink-connector-hive/src/test/java/org/apache/flink/connectors/hive/HiveTableSourceITCase.java:
##########
@@ -190,6 +190,29 @@ public void testReadParquetComplexDataType() throws
Exception {
batchTableEnv.unloadModule("hive");
}
+ @Test
+ public void testReadParquetArrayDataType() throws Exception {
+ batchTableEnv.executeSql(
+ "create table parquet_complex_type_test("
+ + "a array<int>, m map<int,string>, s
struct<f1:int,f2:bigint>) stored as parquet");
+ // load hive module so that we can use array,map, named_struct function
+ // for convenient writing complex data
+ batchTableEnv.loadModule("hive", new HiveModule());
+ batchTableEnv.useModules("hive", CoreModuleFactory.IDENTIFIER);
+
+ batchTableEnv
+ .executeSql(
+ "insert into parquet_complex_type_test"
+ + " select array(1, 2), map(1, 'val1', 2,
'val2'),"
+ + " named_struct('f1', 1, 'f2', 2)")
+ .await();
+
+ Table src = batchTableEnv.sqlQuery("select a[1], a[3] from
parquet_complex_type_test");
Review Comment:
I think we can just move the test to `testReadParquetComplexDataType`.
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