Collection::dropIndex

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Collection::dropIndex — Drop collection index

说明

public mysql_xdevapi\Collection::dropIndex ( string $index_name ) : bool

Drop a collection index.

This operation does not yield an error if the index does not exist, but FALSE is returned in that case.

参数

index_name: Name of collection index to drop.

返回值

TRUE if the DROP INDEX operation succeeded, otherwise FALSE.

范例

Example #1 mysql_xdevapi\Collection::dropIndex() 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");

// ...

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

$collection->createIndex(
  'myindex', 
  '{"fields": [{"field": "$.name", "type": "TEXT(25)", "required": true}], "unique": false}'
);

// ...

if ($collection->dropIndex('myindex')) {
    echo 'An index named 'myindex' was found, and dropped.';
}
?>

以上例程会输出：

An index named 'myindex' was found, and dropped.