MongoDB::QueryResult(3pm) User Contributed Perl Documentation MongoDB::QueryResult(3pm) NAME MongoDB::QueryResult - An iterator for Mongo query results VERSION version v2.2.2 SYNOPSIS $cursor = $coll->find( $filter ); $result = $cursor->result; while ( $doc = $result->next ) { process_doc($doc) } DESCRIPTION This class defines an iterator against a query result. It automatically fetches additional results from the originating mongod/mongos server on demand. For backwards compatibility reasons, MongoDB::Cursor encapsulates query parameters and generates a "MongoDB::QueryResult" object on demand. All iterators on "MongoDB::Cursor" delegate to "MongoDB::QueryResult" object. Retrieving this object and iterating on it directly will be slightly more efficient. USAGE Error handling Unless otherwise explicitly documented, all methods throw exceptions if an error occurs. The error types are documented in MongoDB::Error. To catch and handle errors, the Try::Tiny and Safe::Isa modules are recommended: Cursor destruction When a "MongoDB::QueryResult" object is destroyed, a cursor termination request will be sent to the originating server to free server resources. Multithreading NOTE: Per threads documentation, use of Perl threads is discouraged by the maintainers of Perl and the MongoDB Perl driver does not test or provide support for use with threads. Iterators are cloned in threads, but not reset. Iterating from multiple threads will give unpredictable results. Only iterate from a single thread. METHODS has_next if ( $response->has_next ) { ... } Returns true if additional documents are available. This will attempt to get another batch of documents from the server if necessary. next while ( $doc = $result->next ) { process_doc($doc) } Returns the next document or "undef" if the server cursor is exhausted. batch while ( @batch = $result->batch ) { for $doc ( @batch ) { process_doc($doc); } } Returns the next batch of documents or an empty list if the server cursor is exhausted. all @docs = $result->all; Returns all documents as a list. AUTHORS o David Golden <david AT mongodb.com> o Rassi <rassi AT mongodb.com> o Mike Friedman <friedo AT friedo.com> o Kristina Chodorow <k.chodorow AT gmail.com> o Florian Ragwitz <rafl AT debian.org> COPYRIGHT AND LICENSE This software is Copyright (c) 2020 by MongoDB, Inc. This is free software, licensed under: The Apache License, Version 2.0, January 2004 perl v5.30.3 2020-08-15 MongoDB::QueryResult(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2024-12-12 19:45 @18.227.102.73 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)