CollectionFind::limit

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CollectionFind::limit — Limit number of returned documents

说明

public mysql_xdevapi\CollectionFind mysql_xdevapi\CollectionFind::limit ( integer $rows )

Set the maximum number of documents to return.

参数

rows: Maximum number of documents.

返回值

A CollectionFind object that can be used for additional processing; chain with the execute() method to return a DocResult object.

范例

Example #1 mysql_xdevapi\CollectionFind::limit() example


<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$session->sql("DROP DATABASE IF EXISTS addressbook")->execute();
$session->sql("CREATE DATABASE addressbook")->execute();

$schema = $session->getSchema("addressbook");
$create = $schema->createCollection("people");
$create
  ->add('{"name": "Alfred", "age": 18, "job": "Butler"}')
  ->execute();
$create
  ->add('{"name": "Reginald", "age": 42, "job": "Butler"}')
  ->execute();


// ...

$collection = $schema->getCollection("people");

$result = $collection
  ->find('job like :job and age > :age')
  ->bind(['job' => 'Butler', 'age' => 16])
  ->sort('age desc')
  ->limit(1)
  ->execute();

var_dump($result->fetchAll());
?>

以上例程的输出类似于：

array(1) {
  [0]=>
  array(4) {
    ["_id"]=>
    string(28) "00005b6b536100000000000000f3"
    ["age"]=>
    int(42)
    ["job"]=>
    string(6) "Butler"
    ["name"]=>
    string(8) "Reginald"
  }
}