This parameter represents the type of response writer we wanted to view the result. It specifies the list of the fields to return for all the documents in the result set It specifies the list of fields separated by commas, based on which the query results are to be sorted The value of this parameter is 10 by default The default value of this parameter is 0. Restrict the result set to the superset documents that match the filter, for example, defined via Function Range Query Parser Their similarity scores document to terms in this parameter. The main query parameter of Apache Solr - the field names and values.
#APACHE LUCENE QUERY SYNTAX PLUS#
The table below lists them, plus practical examples.
The different parameter names directly correspond with the names of the entry fields in the forms explained above. The query syntax is best described in and.
This has been outsourced to a separate project called SolrJ - a Java API without requiring an HTTP connection. A special case of this is connecting to Apache Solr via Java API. Solr processes the request and returns an answer. This is an HTTP request that can be sent to Apache Solr by any application. For practical examples, have a look below.Īs the second option, you can send a request using an API. The default value is JSON.Ĭlicking on the Execute Query button runs the desired request. Limits the information included in a query response to a specified list of fields.ĭefine the desired output format. Limit the output to the specified elements Restrict the superset of documents that can be returned without affecting the document score.ĭefine the sort order of the query results to either ascending or descending You can choose between the default request handlers “/select” (query indexed data), “/update” (update indexed data), and “/delete” (remove the specified indexed data), or a self-defined one.ĭefine which field names and values to be selected. Next, the dashboard will display several input fields as follows:ĭefine which kind of request you would like to send to Solr. The figure below shows the Dashboard from the Apache Solr Administration User Interface with the different query forms in the web browser Firefox.įirst, from the menu under the core selection field, choose the menu entry “Query”. It is common to use the first option for testing purposes and not for regular access. There are two options - via dashboard/web interface or using an API by sending a corresponding request. The result is that any client application can communicate with Solr by sending queries to it (the focus of this article), manipulating the document core by adding, updating, and deleting indexed data, and optimizing core data. Querying Apache SolrĪpache Solr is designed as a web application and service that runs in the background.
#APACHE LUCENE QUERY SYNTAX HOW TO#
Also, we will discuss how to post-process the search result using different output formats such as XML, CSV, and JSON. We will cover how to refine the query, formulate more complex search criteria with different parameters, and understand the Apache Solr query page’s different web forms. This is a follow-up article to the previous one. In the previous article, we set up Apache Solr on the soon-to-be-released Debian GNU/Linux 11, initiated a single data core, uploaded example data, and demonstrated how to do a basic search within the data set using a simple query. Apache Solr is a search engine framework written in Java and based on the Lucene search library.
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