Bruce Robbins created SPARK-42401:
-------------------------------------
Summary: Incorrect results or NPE when inserting null value using
array_insert/array_append
Key: SPARK-42401
URL: https://issues.apache.org/jira/browse/SPARK-42401
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.4.0, 3.5.0
Reporter: Bruce Robbins
Example:
{noformat}
create or replace temp view v1 as
select * from values
(array(1, 2, 3, 4), 5, 5),
(array(1, 2, 3, 4), 5, null)
as v1(col1,col2,col3);
select array_insert(col1, col2, col3) from v1;
{noformat}
This produces an incorrect result:
{noformat}
[1,2,3,4,5]
[1,2,3,4,0] <== should be [1,2,3,4,null]
{noformat}
A more succint example:
{noformat}
select array_insert(array(1, 2, 3, 4), 5, cast(null as int));
{noformat}
This also produces an incorrect result:
{noformat}
[1,2,3,4,0] <== should be [1,2,3,4,null]
{noformat}
Another example:
{noformat}
create or replace temp view v1 as
select * from values
(array('1', '2', '3', '4'), 5, '5'),
(array('1', '2', '3', '4'), 5, null)
as v1(col1,col2,col3);
select array_insert(col1, col2, col3) from v1;
{noformat}
The above query throws a {{NullPointerException}}:
{noformat}
23/02/10 11:08:05 ERROR SparkSQLDriver: Failed in [select array_insert(col1,
col2, col3) from v1]
java.lang.NullPointerException
at
org.apache.spark.sql.catalyst.expressions.codegen.UnsafeWriter.write(UnsafeWriter.java:110)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.apply(Unknown
Source)
at
org.apache.spark.sql.execution.LocalTableScanExec.$anonfun$unsafeRows$1(LocalTableScanExec.scala:44)
{noformat}
{{array_append}} has the same issue:
{noformat}
spark-sql> select array_append(array(1, 2, 3, 4), cast(null as int));
[1,2,3,4,0] <== should be [1,2,3,4,null]
Time taken: 3.679 seconds, Fetched 1 row(s)
spark-sql> select array_append(array('1', '2', '3', '4'), cast(null as string));
23/02/10 11:13:36 ERROR Executor: Exception in task 0.0 in stage 1.0 (TID 1)
java.lang.NullPointerException
at
org.apache.spark.sql.catalyst.expressions.codegen.UnsafeWriter.write(UnsafeWriter.java:110)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.project_doConsume_0$(Unknown
Source)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown
Source)
{noformat}
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