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https://issues.apache.org/jira/browse/SOLR-538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622879#action_12622879
 ] 

Otis Gospodnetic commented on SOLR-538:
---------------------------------------

Lars, do you think you could change those tabs into 2 spaces to follow the code 
style convention?

In CopyFieldTest I see things like:

+              try {
+                       new CopyField(null,
+                                       new SchemaField("destination", new 
TextField()), 1000);
+                       fail("CopyField failed with null SchemaField 
argument.");
+               } catch (IllegalArgumentException e) {
+                       assertTrue(e.getLocalizedMessage().contains("can't be 
NULL"));

Does the assertTrue message really accurately describe the exception?  What is 
null in the above case?  What happens when maxLength="0"?  The previous/default 
copy-everything behaviour, right?  Maybe I missed it, but I didn't see that in 
any javadocs or comments or the example schema.xml.


> CopyField maxLength property
> ----------------------------
>
>                 Key: SOLR-538
>                 URL: https://issues.apache.org/jira/browse/SOLR-538
>             Project: Solr
>          Issue Type: Improvement
>          Components: update
>            Reporter: Nicolas Dessaigne
>            Priority: Minor
>         Attachments: CopyFieldMaxLength.patch, CopyFieldMaxLength.patch, 
> SOLR-538.patch
>
>
> As discussed shortly on the mailing list (http://www.mail-archive.com/[EMAIL 
> PROTECTED]/msg09807.html), the objective of this task is to add a maxLength 
> property to the CopyField "command". This property simply limits the number 
> of characters that are copied.
> This is particularly useful to avoid very slow highlighting when the index 
> contains big documents.
> Example :
> <copyField source="text" dest="highlight" maxLength="30000" />
> This approach has also the advantage of limiting the index size for large 
> documents (the original text field does not need to be stored and to have 
> term vectors). However, the index is bigger for small documents...

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