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    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.

    示例

    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.";
    }
    ?>

    以上示例会输出：

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