[OASIS Issue Tracker] (ODATA-781) substring: what to return if the start index is outside the first argument string, or the desired length exceeds the remaining string length

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

    [ https://issues.oasis-open.org/browse/ODATA-781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=58651#comment-58651 ] 

Evan Ireland commented on ODATA-781:
------------------------------------

What about using the precent established with JavaScript (to avoid unnecesarily speicfying undefined behaviour).

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substring

If indexA equals indexB, substring() returns an empty string.
If indexB is omitted, substring() extracts characters to the end of the string.
If either argument is less than 0 or is NaN, it is treated as if it were 0.
If either argument is greater than stringName.length, it is treated as if it were stringName.length.

> substring: what to return if the start index is outside the first argument string, or the desired length exceeds the remaining string length
> --------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ODATA-781
>                 URL: https://issues.oasis-open.org/browse/ODATA-781
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Improvement
>          Components: OData URL Conventions
>    Affects Versions: V4.0_ERRATA02
>         Environment: [Proposed]
>            Reporter: Ralf Handl
>             Fix For: V4.0_ERRATA03
>
>
> This could be a "bad request" returning no results at all, or it could evaluate to null, which may just lead to excluding the offending instance from the result.
> Or a mix of both: negative start index is "bad request", start index or desired length beyond the end of the first argument is "null".



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