Collection::dropIndex

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Collection::dropIndexDrop 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.
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