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https://issues.apache.org/jira/browse/SPARK-16220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-16220.
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Resolution: Fixed
Assignee: Herman van Hovell
Fix Version/s: 2.0.1
> Revert ShowFunctions/ListFunctions in 2.0 to Reflect 1.6 Functionality
> ----------------------------------------------------------------------
>
> Key: SPARK-16220
> URL: https://issues.apache.org/jira/browse/SPARK-16220
> Project: Spark
> Issue Type: Bug
> Components: Spark Core, SQL
> Affects Versions: 2.0.0, 2.0.1, 2.1.0
> Reporter: Bill Chambers
> Assignee: Herman van Hovell
> Fix For: 2.0.1
>
>
> After discussing this with [~marmbrus] and [~rxin]. We've decided to revert
> SPARK-15663. After doing some research it seems like this is an unnecessary
> departure from 1.X functionality and does not have a reasonable substitute
> that gives the same functionality.
> The first step is to revert the change. After doing that there are a couple
> of different ways to approachs to getting at user defined functions.
> 1. SHOW FUNCTIONS (shows all of them) + SHOW USER FUNCTIONS (Snowflake does
> this)
> 2. SHOW FUNCTIONS + SHOW USER FUNCTIONS + SHOW ALL FUNCTIONS
> 3. SHOW FUNCTIONS + SHOW SYSTEM FUNCTIONS (or something similar)
> 4. SHOW FUNCTIONS + some column to designate if it's system designed or user
> defined.
> 1. This aligns with previous functionality and then supplements it with
> something a bit more specific.
> 2. Is unclear because "all" is just unclear why does the default refer to
> only user defined functions. This doesn't seem like the right approach.
> 3. Same kind of issue, I'm not sure why the user functions should be the
> default over the system functions. That doesn't seem like the correct
> approach.
> 4. This one seems nice because it kind of achieves #1, keeps existing
> functionality, but then supplants it with some more. This also allows you,
> for example, to create your own set of date functions and then search them
> all in one go as opposed to searching system and then user functions. This
> would have to return two columns though, which could potentially be an issue?
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