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https://issues.apache.org/jira/browse/SPARK-41234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17653778#comment-17653778
]
Ruifeng Zheng commented on SPARK-41234:
---------------------------------------
{code:sql}
+--------------------------------------------+
| ARRAY_INSERT(ARRAY_CONSTRUCT(1,2,3), 0, 4) |
|--------------------------------------------|
| [ |
| 4, |
| 1, |
| 2, |
| 3 |
| ] |
+--------------------------------------------+
1 Row(s) produced. Time Elapsed: 0.139s
+--------------------------------------------+
| ARRAY_INSERT(ARRAY_CONSTRUCT(1,2,3), 2, 4) |
|--------------------------------------------|
| [ |
| 1, |
| 2, |
| 4, |
| 3 |
| ] |
+--------------------------------------------+
1 Row(s) produced. Time Elapsed: 0.116s
+-----------------------------------------------+
| ARRAY_INSERT(ARRAY_CONSTRUCT(1,2,3), 2, NULL) |
|-----------------------------------------------|
| [ |
| 1, |
| 2, |
| undefined, |
| 3 |
| ] |
+-----------------------------------------------+
1 Row(s) produced. Time Elapsed: 0.130s
+--------------------------+
| ARRAY_INSERT(NULL, 2, 1) |
|--------------------------|
| NULL |
+--------------------------+
1 Row(s) produced. Time Elapsed: 0.106s
+-----------------------------+
| ARRAY_INSERT(NULL, 2, NULL) |
|-----------------------------|
| NULL |
+-----------------------------+
1 Row(s) produced. Time Elapsed: 0.113s
+---------------------------------------------+
| ARRAY_INSERT(ARRAY_CONSTRUCT(1,2,3), 10, 1) |
|---------------------------------------------|
| [ |
| 1, |
| 2, |
| 3, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| 1 |
| ] |
+---------------------------------------------+
1 Row(s) produced. Time Elapsed: 0.116s
+----------------------------------------------+
| ARRAY_INSERT(ARRAY_CONSTRUCT(1,2,3), -10, 1) |
|----------------------------------------------|
| [ |
| 1, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| 1, |
| 2, |
| 3 |
| ] |
+----------------------------------------------+
1 Row(s) produced. Time Elapsed: 0.111s
+------------------------------------------------+
| ARRAY_INSERT(ARRAY_CONSTRUCT(1,2,3), 10, NULL) |
|------------------------------------------------|
| [ |
| 1, |
| 2, |
| 3, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined |
| ] |
+------------------------------------------------+
1 Row(s) produced. Time Elapsed: 0.109s
+-------------------------------------------------+
| ARRAY_INSERT(ARRAY_CONSTRUCT(1,2,3), -10, NULL) |
|-------------------------------------------------|
| [ |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| undefined, |
| 1, |
| 2, |
| 3 |
| ] |
+-------------------------------------------------+
1 Row(s) produced. Time Elapsed: 0.210s
{code}
> High-order function: array_insert
> ---------------------------------
>
> Key: SPARK-41234
> URL: https://issues.apache.org/jira/browse/SPARK-41234
> Project: Spark
> Issue Type: Sub-task
> Components: PySpark, SQL
> Affects Versions: 3.4.0
> Reporter: Ruifeng Zheng
> Priority: Major
>
> refer to
> https://docs.snowflake.com/en/developer-guide/snowpark/reference/python/api/snowflake.snowpark.functions.array_insert.html
> 1, about the data type validation:
> In Snowflake’s array_append, array_prepend and array_insert functions, the
> element data type does not need to match the data type of the existing
> elements in the array.
> While in Spark, we want to leverage the same data type validation as
> array_remove.
> 2, about the NULL handling
> Currently, SparkSQL, SnowSQL and PostgreSQL deal with NULL values in
> different ways.
> Existing functions array_contains, array_position and array_remove in
> SparkSQL handle NULL in this way, if the input array or/and element is NULL,
> returns NULL. However, this behavior should be broken.
> We should implement the NULL handling in array_insert in this way:
> 2.1, if the array is NULL, returns NULL;
> 2.2 if the array is not NULL, the element is NULL, append the NULL value into
> the array
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