Documentation Home
MySQL PHP API
Download this Manual
PDF (US Ltr) - 2.4Mb
PDF (A4) - 2.4Mb
HTML Download (TGZ) - 250.9Kb
HTML Download (Zip) - 258.4Kb


MySQL PHP API  /  ...  /  CollectionFind::fields

5.9.4 CollectionFind::fields

Copyright 1997-2019 the PHP Documentation Group.

  • CollectionFind::fields

    Set document field filter

Description

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.

Parameters

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.

Return Values

A CollectionFind object that can be used for further processing.

Examples

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"
  }
}