02-19-2020
Believe answer to one of your questions is wrong re definition of <MOVED TO ADMIN AREA>
Moderator's Comments:
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Neo: I have copied this post to the admin forum so we do not start posting answers to questions in public forums, which will take the fun out of playing computer trivia. Iwill check the DB and get back to you, Mike Baran. In the future, the most important thing when anyone suspects an issue with a true /false statement is to record the trivia number. There are currently over 1000 questions and so we need the number to save time checking the DB. As always,, thanks! I will post back here the results of my research into this (done, see post #3 below).
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LEARN ABOUT PHP
mongocommandcursor
MONGOCOMMANDCURSOR(3) 1 MONGOCOMMANDCURSOR(3)
The MongoCommandCursor class
INTRODUCTION
A command cursor is similar to a MongoCursor except that you use it for iterating through the results of a database command instead of a
normal query. Command cursors are useful for iterating over large result sets that might exceed the document size limit (currently 16MB) of
a single MongoDB.command(3) response.
While you can create command cursors using MongoCommandCursor.__construct(3) or the MongoCommandCursor.createFromDocument(3) factory
method, you will generally want to use command-specific helpers such as MongoCollection.aggregateCursor(3).
Note that the cursor does not "contain" the database command's results; it just manages iteration through them. Thus, if you print a cur-
sor (f.e. with var_dump(3) or print_r(3)), you will see the cursor object but not the result documents.
CURSOR STAGES
A MongoCommandCursor has two "life stages": pre- and post- command. When a cursor is created, it has not yet contacted the database, so it
is in its pre-command state. When the client first attempts to get a result (by calling MongoCommandCursor.rewind(3), directly or indi-
rectly), the cursor moves into the post-command state.
The command cursor's batch size and socket timeout may be configured in both the pre- and post- command states.
Example #1
Adding options to MongoCommandCursor
<?php
$cursor = new MongoCommandCursor(...);
$cursor = $cursor->batchSize( 4 );
foreach ($cursor as $result) {
var_dump($result);
}
?>
CLASS SYNOPSIS
MongoCommandCursor
MongoCommandCursorMongoCursorInterfaceIterator
Methods
o public MongoCommandCursor MongoCommandCursor::batchSize (int $batchSize)
o public MongoCommandCursor::__construct (MongoClient $connection, string $ns, array $command = array())
o publicstatic MongoCommandCursor MongoCommandCursor::createFromDocument (MongoClient $connection, string $hash, array $document)
o public array MongoCommandCursor::current (void )
o public bool MongoCommandCursor::dead (void )
o public array MongoCommandCursor::getReadPreference (void )
o public array MongoCommandCursor::info (void )
o public int MongoCommandCursor::key (void )
o public void MongoCommandCursor::next (void )
o public array MongoCommandCursor::rewind (void )
o public MongoCommandCursor MongoCommandCursor::setReadPreference (string $read_preference, [array $tags])
o public MongoCommandCursor MongoCommandCursor::timeout (int $ms)
o public bool MongoCommandCursor::valid (void )
SEE ALSO
o MongoDB::command
o MongoCollection::aggregateCursor
PHP Documentation Group MONGOCOMMANDCURSOR(3)