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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/07/15 06:07:00 UTC
[jira] [Commented] (SPARK-28368) Row.getAs() return different
values in scala and java
[ https://issues.apache.org/jira/browse/SPARK-28368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16884874#comment-16884874 ]
Hyukjin Kwon commented on SPARK-28368:
--------------------------------------
Scala types like {{Int}} are actually primitive types whereas you're using boxed {{Integer}} where {{null}} is legitimate. Looks not an issue to me.
> Row.getAs() return different values in scala and java
> -----------------------------------------------------
>
> Key: SPARK-28368
> URL: https://issues.apache.org/jira/browse/SPARK-28368
> Project: Spark
> Issue Type: Bug
> Components: Java API
> Affects Versions: 2.4.3
> Reporter: Kideok Kim
> Priority: Major
>
> *description*
> * About [org.apache.spark.sql.Row.getAs()|https://spark.apache.org/docs/2.4.3/api/java/org/apache/spark/sql/Row.html#getAs-java.lang.String-], It doesn't return zero value in java even if I used primitive type null value. (scala return zero value.) Here is an example with spark ver 2.4.3.
> {code:java}
> @Test
> public void testIntegerTypeNull() {
> StructType schema = createStructType(Arrays.asList(createStructField("test", IntegerType, true)));
> Object[] values = new Object[1];
> values[0] = null;
> Row row = new GenericRowWithSchema(values, schema);
> Integer result = row.getAs("test");
> System.out.println(result); // result = null
> }{code}
> * This problem is shown by not only Integer type, but also all primitive types of java like double, long and so on. I really appreciate if you confirm whether it is a normal or not.
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