Solr suggester1/11/2024 _nest_path_ is populated by Solr automatically with the path of the document in the hierarchy for non-root documents.įun fact, when searching for “_root_:mutual_fund” and “_nest_parent_:mutual_fund” returns the same response, meaning they both return the children of mutual_fund(the stocks under this mutual fund)._nest_parent_ stores the value of the document’s parent._root_ a new field created by Solr (stores the value of the top ID/parent ID of a document ).The key players of parent-child relations in Solr: Solr enables us to store nested documents in form of Parent-Child, this arrangement helps us execute faster queries as this relation is already stored and not needs to be recomputed. To solve this problem Solr has a property of Parent-Child relation for documents. But can’t there be another way for faster queries? turns out there is. Mutual funds and stock both have tonnes of data, most of them being boringīut since such data can have many fields, the use of SQL doesn’t seem so wise thus a NoSQL database will come into play, here we can mention their IDs in each other, and we will have to return a query time join. One way of storing this in SQL would be to store the mutual fund in a table and the Stocks in another table, maintain a field in the Mutual Fund column for all stocks, and mention the Mutual Fund ID in the stock column. So let’s understand it via an example:Īssume a mutual fund with 40 stocks, how would we store this data? What would be the structure or database? But let’s talk about the parent-child relation in Solr that can help us understand this NoSQL database better. Well, this is possible programmatically for specific documents or for all at once. ![]() ![]() bin/post -c market *.json this will index json files in market collection bin/post -c market mutual/fund/stock.json this will index stock.json in market collection 2. But as we know, with great powers comes great responsibility, the responsibility of maintaining the entire index of our directory for data entered or deleted.īin/post is a command line tool that can be used for indexing the value in Solr. Solr and Elasticsearch both come in the league of search engines, meaning they’re as effective as a search engine, this indeed is a great title to hold. Solr after being called a Search Engine and using indexing
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