CollectionModify::limit

(No version information available, might only be in Git)

CollectionModify::limitLimit number of modified documents

说明

public mysql_xdevapi\CollectionModify::limit(int $rows): mysql_xdevapi\CollectionModify

Limit the number of documents modified by this operation. Optionally combine with skip() to define an offset value.

参数

rows

The maximum number of documents to modify.

返回值

A CollectionModify object.

示例

示例 #1 mysql_xdevapi\CollectionModify::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");
$collection = $schema->createCollection("people");

$collection->add('{"name": "Fred", "age": 21, "job": "Construction"}')->execute();
$collection->add('{"name": "Wilma", "age": 23, "job": "Teacher"}')->execute();
$collection->add('{"name": "Betty", "age": 24, "job": "Teacher"}')->execute();

$collection
->modify("job = :job")
->
bind(['job' => 'Teacher'])
->
set('job', 'Principal')
->
limit(1)
->
execute();

$result = $collection
->find()
->
execute();

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

以上示例的输出类似于:

Array
(
    [0] => Array
        (
            [_id] => 00005b6b53610000000000000118
            [age] => 21
            [job] => Construction
            [name] => Fred
        )
    [1] => Array
        (
            [_id] => 00005b6b53610000000000000119
            [age] => 23
            [job] => Principal
            [name] => Wilma
        )
    [2] => Array
        (
            [_id] => 00005b6b5361000000000000011a
            [age] => 24
            [job] => Teacher
            [name] => Betty
        )
)
add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top