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https://issues.apache.org/jira/browse/SOLR-11741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16464841#comment-16464841
]
Abhishek Kumar Singh commented on SOLR-11741:
---------------------------------------------
In order to use LearnSchemaUpdateRequestProcessorFactory, add just it to the
URP chain.
The new API details are :-
# *_Get A Training Id:_***
*_GET_*
*_/<corename>/schema/train/start_*
Response:
{code:java}
{"schemaTrainingId" : "<new schema training id>"}
{code}
*2. Start Training:*
This api is just like another update api, with documents to be trained with.
*POST*
*/<corename>/update?schemaTrainingId=<trainingId>*
{code:java}
Body: (Same as update request)
[{}]
{code}
*3. Get the schema trained so far:-*
*GET*
*/schema/train/yield?schemaTrainingId=<currentTrainingId>*
*Response:*
{code:java}
{
"schema":{
"add-field-type": [
{ "name":<fieldname1>, "type":<type>, "multivalued":<true/false>},
{ "name":<fieldname2>, "type":<type>, "multivalued":<true/false>},
...
]
}
}
{code}
**
> Offline training mode for schema guessing
> -----------------------------------------
>
> Key: SOLR-11741
> URL: https://issues.apache.org/jira/browse/SOLR-11741
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Ishan Chattopadhyaya
> Priority: Major
> Attachments: RuleForMostAccomodatingField.png, SOLR-11741-temp.patch,
> SOLR-11741.patch, SOLR-11741.patch, SOLR-11741.patch, screenshot-1.png,
> screenshot-3.png
>
>
> Our data driven schema guessing doesn't work under many situations. For
> example, if the first document has a field with value "0", it is guessed as
> Long and subsequent fields with "0.0" are rejected. Similarly, if the same
> field had alphanumeric contents for a latter document, those documents are
> rejected. Also, single vs. multi valued field guessing is not ideal.
> Proposing an offline training mode where Solr accepts bunch of documents and
> returns a guessed schema (without indexing). This schema can then be used for
> actual indexing. I think the original idea is from Hoss.
> I think initial implementation can be based on an UpdateRequestProcessor. We
> can hash out the API soon, as we go along.
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