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Posted to issues@spark.apache.org by "gabrywu (Jira)" <ji...@apache.org> on 2022/12/17 05:19:00 UTC
[jira] [Comment Edited] (SPARK-41556) input_file_positon
[ https://issues.apache.org/jira/browse/SPARK-41556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17648856#comment-17648856 ]
gabrywu edited comment on SPARK-41556 at 12/17/22 5:18 AM:
-----------------------------------------------------------
[~yumwang] [~petertoth] What do you think of it?
was (Author: gabry.wu):
[~yumwang] [~ptoth] What do you think of it?
> input_file_positon
> ------------------
>
> Key: SPARK-41556
> URL: https://issues.apache.org/jira/browse/SPARK-41556
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 3.3.1
> Reporter: gabrywu
> Priority: Trivial
>
> As for now, we have 3 built-in UDFs related to input files and blocks. So can we provide a new UDF to return current record position of a file or block? Sometimes, it's useful and we can consider this position (called ROWID in oracle) as a physical primary key.
>
> |input_file_block_length()|Returns the length of the block being read, or -1 if not available.|
> |input_file_block_start()|Returns the start offset of the block being read, or -1 if not available.|
> |input_file_name()|Returns the name of the file being read, or empty string if not available.|
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