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

示例 #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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