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https://issues.apache.org/jira/browse/SPARK-34881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gengliang Wang updated SPARK-34881:
-----------------------------------
Parent: SPARK-35161
Issue Type: Sub-task (was: New Feature)
> New SQL Function: TRY_CAST
> --------------------------
>
> Key: SPARK-34881
> URL: https://issues.apache.org/jira/browse/SPARK-34881
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Gengliang Wang
> Assignee: Gengliang Wang
> Priority: Major
> Fix For: 3.2.0
>
>
> Add a new SQL function try_cast. try_cast is identical to CAST with
> `spark.sql.ansi.enabled` as true, except it returns NULL instead of raising
> an error. This expression has one major difference from `cast` with
> `spark.sql.ansi.enabled` as true: when the source value can't be stored in
> the target integral(Byte/Short/Int/Long) type, `try_cast` returns null
> instead of returning the low order bytes of the source value.
> This is learned from Google BigQuery and Snowflake:
> https://docs.snowflake.com/en/sql-reference/functions/try_cast.html
> https://cloud.google.com/bigquery/docs/reference/standard-sql/functions-and-operators#safe_casting
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