In the solr documentation, there are options to delete documents using a query, something like the following:
<delete><query>*:*</query></delete>
<delete><query>id:298253</query>
<query>entitytype:BlogEntry</query></delete>
However, I could not find any references about updating documents based on a query. Is this possible with updates in solr? Basically I would like to update the values of all the documents that match a query.
Something like update prop1=val1, prop2=val2 where ( prop3 < val3 and prop4=val4 )
Thanks,
-Vineel
The ability to update documents is being added to the Solr 4.0 release, which just went into Beta this week. I am not sure if there will be the ability to update documents based on a query, but you could ask in the Solr Users List. Unfortunately, I have not had a chance to explore the 4.0 version yet to see how atomic updates work.
Keep in mind that for partially updating documents in Solr, they need to be stored. Which increases the index size. Check this for some background
Related
currently am using DIH for pulling data from MSSQL server to SOLR. Where in am using dataimporter.last_index_time to pull the records which are into database only after last_index_time. So i was exploring if there are any other option for DIH to use instead of using last_index_time may be something like last_pk_id.
Is such option available? could anyone let me know.
not provided by Solr itself.
But nothing prevents you from doing this:
set your DIH sql for the delta like this:
WHERE (last_pk_id > '${dataimporter.request.LAST_PK_ID}')
when you run some indexing, store, outside Solr, the last_pk_id value you indexed, say 333.
next time you need to delta index, add to your request
...&clean=false&LAST_PK_ID=333
store your new LAST_PK_ID (you can query solr for this)
How can I update or re-index solr index of an existing document in Solr by using its "id"? I am using Solr 4.0.
I researched but I don't find a definite answer anywhere.
Lucene is an append only store. Update syntax in solr would essentially translate into delete and insert. So we heed to give full document with all its fields to update. With Solr 4 and above, you have option of atomic update so that you can only update certain fields. In this case there is a constraint that all the solr schema fields should be "stored". So internally solr does get and then merge the field into the retrieved document and then insert.
The documentation links below:
Update using CSV - The index can also updated using XML
Atomic Update - This just saves on the network to retrieve the document to client and then update.
I'm using Apache Solr for powering the search functionality in my Drupal site using a contributed module for drupal named ApacheSolr Search Integration. I'm pretty novice with Solr and have a basic understanding of it, hence wish to convey my apologies in advance if this query sounds outrageous.
I have a date field added through one of drupal's hooks named ds_myDate which I initially used for sorting the search results. I decided to use a date boosting, so that the search results are displayed based on relevancy and boosted by their date rather than merely being displayed by the descending order of date. Once I had updated my hook to implement the same by adding a boost field as recip(ms(NOW/HOUR,ds_myDate),3.16e-11,1,1) I got a HTTP 400 error stating
Can't use ms() function on non-numeric legacy date field ds_myDate
Googling for the same suggested that I use a TrieDateField instead of the Legacy DateField to prevent this error. Adding a TrieDate field named tds_myDate following the suggested naming convention and implementing the boost as recip(ms(NOW/HOUR,tds_myDate),3.16e-11,1,1) did effectively achieve the boosting. However this requires me to reindex all the content (close to 500k records) to populate the new TrieDate field so that I may be able to use it effectively.
I'd request to know if there's an effective workaround than re-indexing all my content such as converting my ds_myDate to a TrieDate field like running an alter query on a mysql table field to change its type. Since I'm unfamiliar with how Solr works would request to know if such an option is feasible and what the right thing to do would be for this case.
You may be able to achieve it by doing a Partial update, but for that you need to be on on Solr 4+ and storing all indexed fields.
Here is how I would go with this:
Make sure version of Solr is 4+
Make sure all indexed fields are stored (requirement for partial updates)
If above two conditions meet, write a script(PHP), which does following:
1) Iterate through full Solr index, and for each doc:
----a) read value stored in ds_myDate field
----b) Convert it to TrieDateField format
----c) Push onto Solr, via partial update to only tds_myDate field (see sample query)
Sample query:
curl 'localhost:8983/solr/update?commit=true' -H 'Content-type:application/json' -d '[{"id":"$id","tds_myDate":{"set":$converted_Val}}]'
For more details on partial updates: http://solr.pl/en/2012/07/09/solr-4-0-partial-documents-update/
Unfortunately, once a document has been indexed a certain way and you change the schema, you cannot have the new schema changes be applied to existing documents until those documents are re-indexed.
Please see this previous question - Does Schema Change need Reindex for additional details.
We need to update the index of Solr 4 but are getting some unexpected results. We run a C# program that uses SolrNet to do an AddRange(). In this process, we're adding new documents and also trying to update existing ones.
We're noticing that some records' fields get updated with the latest data, while others still show the old information. Should we be using the information indicated in the documentation?
The documentation indicates we can set an update="set|add|inc" on the field. If we'd like the existing record to be updated, should we use set? Also, when we delete a field, to have it removed, do we need to shut down Solr and restart? Or set null="true"?
Can you point us to some good information on doing updates to Solr data? Thank you.
The documenation reference that you list describes the parameters for Atomic Updates in Solr 4, which is currently not supported in SolrNet - see issue 199 for more details.
Until this support has been added to SolrNet, your only option for updating documents in the index is to resend the entire document (object in C#) with the required updated/deleted feilds set appropriately. Internally Solr will re-add the document to the index with the updated fields.
Also, when you are adding/updating documents in the index, these changes will not be visible to queries against the index until a commit has been issued. I would recommend using the CommitWithin option of AddParameters to allow Solr to handle this internally, this is described in detail in the SolrWiki - CommitWithin.
I want to edit document filed in solr,for example edit the author name,so i use the following code in solrj:
params.set("literal.author","anaconda")
but the author multivalued="true" in schema and because of that "anaconde" is not replace with it's previous name and add to the end of the author name,also if i ommit the multivalued field or set it to false the bad request exception happen in re-indexing file with new author field,how can i solve this problem and delete or modify the previous document field in solrj?
or does it any config i miss in schema?
thanks
The only option I know of would be to query the full document (all fields using &fl=* parameter) into a local construct with solrj, update the appropriate field(s) and them submit the entire document back to Solr.
Nope there is no way to update specific field for an document in Solr, nor through any of its Client apis.
EDIT :- With Solr 4.0 it it possible to Partially update the documents with certain fields.
This post should be the correct answer to your question (if you are using SOLR 4.x)
For Solr 4.0 you are able to update a single field on a document, but that version is ALPHA, if you are concerned.
But for the update thingy, it is only possible by CURL I think, I didnt find any way to update a single field on a doc on java side by solrj.
You have two options:
As stated in other answers, you can query for the original document, update the field, and then re-save which will overwrite the original document with the new values.
Your other option is to install a nightly build of Solr, where Yonik has added a patch for updateable documents. You should keep an eye on https://issues.apache.org/jira/browse/SOLR-139 as this patch is pretty new and still being worked on.