Posts (page 74)
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6 min readSolr uses a number of techniques to index files, including tokenization, text analysis, and document parsing.Tokenization is the process of breaking a document down into individual words or terms, which are then stored in the index. The text analysis process involves applying various filters and analyzers to the tokens to normalize them and improve search results.
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5 min readTo match 1000gm to 1kg in Solr, you can create a conversion factor in your data processing pipeline that converts grams to kilograms. This can be achieved by either multiplying the gram value by 0.001 or dividing by 1000. Once the conversion is done, you can then index the data in Solr with the appropriate unit (grams or kilograms) so that searches for 1kg would also return results for 1000gm.
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5 min readIn Solr, reducing the length of a multivalued field can be achieved by using the CopyField feature to create a new field with a limited length.First, create a new field in the schema.xml file with the desired maximum length. Then, use the CopyField command to copy the multivalued field values to the new field.
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7 min readTo enable cache logging in Solr, you need to modify the solrconfig.xml file for your Solr core. Look for the <query> tag within the <requestHandler name="/select"> section. Add the following parameter within the <query> tag:<str name="cacheConfig">myCache</str>Replace myCache with the name of the cache you want to enable logging for. You also need to ensure that the cache you specified has logging enabled in the solrconfig.xml file.
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5 min readIn Solr, you can ignore case sensitivity in query by using the function lowercase() or uppercase() on the field you are querying. By converting the field to either all lowercase or all uppercase, you can ensure that the query is not case sensitive. This can be done by modifying the query syntax to include the lowercase() or uppercase() function on the field in question. This way, the query will return results regardless of the case of the text in the field.
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8 min readTo transform a Solr document to a list in Java, you can iterate over the fields of the document and extract the values into a list. You can access the fields of a Solr document using the getFieldNames() method and then retrieve the values of each field using the getFieldValue() method. By looping through the fields and adding their values to a list, you can create a list representation of the Solr document in Java.
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5 min readTo concatenate multiple Solr tokens into one, you can use the Solr function query to concatenate strings or tokens together. This can be achieved by using the concat() function along with the field values or tokens that you want to combine. For example, if you have multiple tokens stored in different fields in your Solr index, you can create a new field in your query that concatenates these tokens together using the concat() function.
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3 min readTo search Arabic words in Solr, ensure that the language-specific analyzer for Arabic is properly configured in the Solr schema.xml file. This will enable Solr to handle Arabic text correctly during indexing and searching. Additionally, make sure that the text fields in your documents are properly analyzed using the Arabic analyzer so that the search query can match Arabic words accurately.
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7 min readTo get the content of a file with Solr, you can use the Solr ExtractingRequestHandler, which allows you to extract text and metadata from various document formats such as PDF, Word, and HTML. This handler can be configured in the solrconfig.xml file to define which file types should be parsed and indexed by Solr.Once the ExtractingRequestHandler is configured, you can send a request to Solr with the file to be indexed as the payload.
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4 min readTo count multi-valued fields in Solr, you can use the facet.pivot parameter in the Solr faceting feature. This parameter allows you to group documents based on multiple fields and obtain counts for each unique combination of values. By specifying the fields you want to count in the pivot parameter, you can get a breakdown of the number of documents that contain each unique combination of field values.
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5 min readTo create mappings between multiple Solr documents, you need to define fields in each document that can be used to establish relationships between them. These fields can be unique identifiers, common attributes, or any other relevant information that can be used for linking the documents together.One common approach is to use a field in each document that serves as a foreign key to another document. This allows you to easily retrieve related documents by querying based on the linking field.
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4 min readTo ignore certain fields in a Solr query, you can utilize the fl parameter in your query request. By specifying the fields you want to retrieve in the fl parameter, you can exclude any fields that you wish to ignore from the search results. This will only return the fields that are explicitly mentioned in the fl parameter and exclude all other fields. This allows you to streamline your query results and focus on the specific information that you need, while disregarding irrelevant fields.