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Posted to dev@lucene.apache.org by "Joel Bernstein (JIRA)" <ji...@apache.org> on 2017/04/24 15:36:04 UTC

[jira] [Updated] (SOLR-10559) Add let and set Streaming Expressions

     [ https://issues.apache.org/jira/browse/SOLR-10559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joel Bernstein updated SOLR-10559:
----------------------------------
    Description: 
The *let* and *get* Streaming Expressions allows the tuples in a stream to assigned to a variable so it can be used more then one time during an expression.

This builds on the *list* and *cell* expressions (SOLR-10551) 

Here is the sample syntax:

{code}
let(cell(a, expr), 
     cell(b, expr), 
     list(cell(a, get(a)),
        cell(b, get(b)),
        cell(correlation, correlate(get(a), fielda, get(b), fieldb)))
{code}

  was:
The *let* and *get* Streaming Expressions allows the tuples in a stream to assigned to a variable so it can be used more then one time during an expression.

This builds on the *list* and *cell* expressions (SOLR-10551) 

Here is the sample syntax:

{code}
let(cell(a, expr), 
   cell(b, expr), 
   list(cell(a, get(a)),
      cell(b, get(b)),
      cell(correlation, correlate(get(a), fielda, get(b), fieldb)))
{code}


> Add let and set Streaming Expressions
> -------------------------------------
>
>                 Key: SOLR-10559
>                 URL: https://issues.apache.org/jira/browse/SOLR-10559
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>
> The *let* and *get* Streaming Expressions allows the tuples in a stream to assigned to a variable so it can be used more then one time during an expression.
> This builds on the *list* and *cell* expressions (SOLR-10551) 
> Here is the sample syntax:
> {code}
> let(cell(a, expr), 
>      cell(b, expr), 
>      list(cell(a, get(a)),
>         cell(b, get(b)),
>         cell(correlation, correlate(get(a), fielda, get(b), fieldb)))
> {code}



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