MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
CollectionFind::fields
Set document field filter
public mysql_xdevapi\CollectionFind mysql_xdevapi\CollectionFind::fields(string projection);Defined the columns for the query to return. If not defined then all columns are used.
projection
Can either be a single string or an array of string, those strings are identifying the columns that have to be returned for each document that match the search condition.
A CollectionFind object that can be used for further processing.
Example 5.32 mysql_xdevapi\CollectionFind::fields
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();
// ...
$collection = $schema->getCollection("people");
$result = $collection
->find('job like :job and age > :age')
->bind(['job' => 'Butler', 'age' => 16])
->fields('name')
->execute();
var_dump($result->fetchAll());
?>
The above example will output something similar to:
array(1) {
[0]=>
array(1) {
["name"]=>
string(6) "Alfred"
}
}