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https://issues.apache.org/jira/browse/SPARK-40112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-40112.
---------------------------------
Fix Version/s: 3.4.0
Resolution: Fixed
Issue resolved by pull request 37483
[https://github.com/apache/spark/pull/37483]
> Improve the TO_BINARY() function
> --------------------------------
>
> Key: SPARK-40112
> URL: https://issues.apache.org/jira/browse/SPARK-40112
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: Vitalii Li
> Assignee: Vitalii Li
> Priority: Major
> Fix For: 3.4.0
>
>
> Original description SPARK-37507:
> {quote}to_binary(expr, fmt) is a common function available in many other
> systems to provide a unified entry for string to binary data conversion,
> where fmt can be utf8, base64, hex and base2 (or whatever the reverse
> operation to_char()supports).
> [https://docs.aws.amazon.com/redshift/latest/dg/r_TO_VARBYTE.html]
> [https://docs.snowflake.com/en/sql-reference/functions/to_binary.html]
> [https://cloud.google.com/bigquery/docs/reference/standard-sql/functions-and-operators#format_string_as_bytes]
> [https://docs.teradata.com/r/kmuOwjp1zEYg98JsB8fu_A/etRo5aTAY9n5fUPjxSEynw]
> Related Spark functions: unbase64, unhex
> {quote}
>
> Expected improvement:
> * `base64` behaves more strictly, i.e. does not allow symbols not included
> in base64 dictionary (A-Za-z0-9+/) and verifies correct padding and symbol
> groups (see RFC 4648 § 4). Whitespaces are ignored.
> ** Current implementation allows arbitrary strings and invalid symbols are
> skipped.
> * `hex` converts only valid hexadecimal strings and throws errors otherwise.
> Whitespaces are not allowed.
> * `utf-8` and `utf8` are interchangeable.
> * Correct errors are thrown and classified for invalid input
> (CONVERSION_INVALID_INPUT) and invalid format (CONVERSION_INVALID_FORMAT)
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