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5 min readOne way to boost results with recent dates in Solr is to use a boosted query with a function that gives more weight to newer documents. You can achieve this by adding a "boost" parameter to your query with a function that calculates a boost factor based on the date of the document. For example, you can use the "recip" function to give a higher boost to documents that are more recent.
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7 min readIn Solr, you can remove duplicates from multivalued fields by configuring the uniqueKey field in the schema of your collection. The uniqueKey field should have a single value for each document in the collection, which can be used to identify and remove duplicates. Additionally, you can use the "collapse" feature in Solr to group duplicate values and only return a single value for each unique key. This can be achieved by using the "group" and "group.
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5 min readTo remove the \n or \t code in Solr, you can use the replace function in a Solr query. You can replace the newline character (\n) or the tab character (\t) with an empty string to remove them from your search results. For example, if you have a field called "description" that contains \n or \t characters, you can use the replace function in your query like this: q=description:/.\n./&rq={.
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5 min readTo pass input parameters to Solr, you can use the various query string parameters supported by the Solr REST API. These parameters can be added to the URL when making a request to the Solr server. Some common input parameters that can be passed to Solr include q (specifying the query), fq (specifying filter queries), sort (specifying the sorting criteria), fl (specifying the fields to be returned), and rows (specifying the number of rows to be returned).
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7 min readTo implement fuzzy search using Solr, you can use the "fuzzy" operator in your Solr query. This operator allows you to search for terms that are similar to the one you provide, allowing for some level of variability in the search results. Fuzzy search can help with retrieving relevant results even when there are minor spelling mistakes or variations in the search terms.To use fuzzy search in Solr, you can append a tilde (~) followed by a number to the search term in your query.
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5 min readIn Solr, a partial update can be done by sending a POST request to the "/update" endpoint with the data to be updated. This data should include the unique identifier of the document that needs to be updated, as well as the field(s) that need to be modified.By specifying the unique identifier, Solr will be able to locate and update the specific document in its index. The field(s) that need to be modified can be updated with new values.
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6 min readTo ignore whitespaces in a Solr query, you can use the "WhitespaceTokenizerFactory" in the Solr schema configuration file. This tokenizer will remove all whitespace characters from the query before it is processed. Additionally, you can also use the "TrimFilterFactory" to remove leading and trailing whitespace from the query. These configurations will help ensure that whitespaces are ignored when performing searches in Solr.
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5 min readIn Solr, you can store and index filenames by defining a field in your schema that specifically stores the filename information. This field should have the necessary attributes set to enable storing and indexing of the filename data.When storing the filename in Solr, you should ensure that the field is configured to store the actual filename value by setting the appropriate attributes in the schema file.
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5 min readTo count the data using Solr, you can use the Solr query syntax to specify the search criteria that you want to count. You can use the "q" parameter in the Solr query to filter the documents that you want to count.For example, to count all documents that match a specific field value in Solr, you can send a query like "q=fieldname:value" where "fieldname" is the name of the field you want to filter on and "value" is the specific value you are looking for.
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5 min readTo get the last document that was inserted into Solr, you can query the collection using a timestamp field that records the time of insertion for each document. By sorting the results in descending order based on the timestamp field and limiting the number of results to one, you can retrieve the most recent document that was inserted into Solr. This approach allows you to efficiently retrieve the last document without having to scan all the documents in the collection.
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9 min readReducing index size in Solr can be achieved through various methods such as optimizing field types and configurations, using appropriate tokenizers and filters, minimizing unnecessary fields and data duplication, and enabling compression for text fields. Additionally, using efficient indexing strategies like batch processing and delta indexing can help in minimizing the index size.