[jira] [Updated] (FLINK-32263) Add ELT support in SQL & Table API

["lincoln lee (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-32263?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

lincoln lee updated FLINK-32263:
--------------------------------
    Fix Version/s: 1.20.0

> Add ELT support in SQL & Table API
> ----------------------------------
>
>                 Key: FLINK-32263
>                 URL: https://issues.apache.org/jira/browse/FLINK-32263
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Planner
>    Affects Versions: 1.18.0
>            Reporter: Bonnie Varghese
>            Assignee: Hanyu Zheng
>            Priority: Major
>              Labels: pull-request-available, stale-assigned
>             Fix For: 1.19.0, 1.20.0
>
>
> Implement the elt function to extract the n-th input value from a list of inputs.
> Description:
> The elt function in the ETL pipeline extracts the value at the n-th position from a list of input values. It is similar to array indexing, where the first element is at position 1. This function provides a convenient way to retrieve specific elements from a list of inputs.
> Syntax:
>  
> {code:java}
> elt[n: int, *inputs: str] -> str or None{code}
>  
> Arguments:
> n: The index of the input value to extract. It should be a positive integer.
> *inputs: Variable-length arguments representing the list of inputs.
> Returns:
> The value at the n-th position in the list of inputs. If the index exceeds the length of the array, the function returns NULL. 
> Examples:
> Retrieving the second element from a list of strings:
> {code:java}
> elt(2, 'scala', 'java')
> Output: 'java'{code}
> Retrieving the second element from a list of mixed types:
> {code:java}
> result = elt(2, 'a', 1)
> Output: 1{code}
> See also:
>  
> spark:[https://spark.apache.org/docs/latest/api/sql/index.html#elt]
>  
>  



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