CollectionFind::fields

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CollectionFind::fieldsSet document field filter

Description

public mysql_xdevapi\CollectionFind::fields(string $projection): mysql_xdevapi\CollectionFind

Defines the columns for the query to return. If not defined, all columns are used.

Parameters

projection

Can either be a single string or an array of strings identifying the columns 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 #1 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"
  }
}