Php/docs/mongodb-driver-manager.executequery
MongoDB\Driver\Manager::executeQuery
(mongodb >=1.0.0)
MongoDB\Driver\Manager::executeQuery — Execute a database query
说明
final public MongoDB\Driver\Manager::executeQuery
( string $namespace
, MongoDB\Driver\Query $query
[, array $options
= array()
] ) : MongoDB\Driver\Cursor
Selects a server according to the "readPreference"
option
and executes the query on that server. By default, the read preference from
the MongoDB Connection
URI will be used.
参数
namespace
(string)A fully qualified namespace (e.g.
"databaseName.collectionName"
).query
(MongoDB\Driver\Query)The query to execute.
options
- {|
|+ options
! Option
! Type
! Description
|-
| readPreference
| MongoDB\Driver\ReadPreference
|
A read preference to use for selecting a server for the operation.
|- | session | MongoDB\Driver\Session
|A session to associate with the operation.
|}
错误/异常
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
- Throws MongoDB\Driver\Exception\ConnectionException if connection to the server fails (for reasons other than authentication).
- Throws MongoDB\Driver\Exception\AuthenticationException if authentication is needed and fails.
- Throws MongoDB\Driver\Exception\RuntimeException on other errors (e.g. invalid query operators).
更新日志
版本 | 说明 |
---|---|
PECL mongodb 1.4.0 | The third parameter is now an options array.
For backwards compatibility, this paramater will still accept a MongoDB\Driver\ReadPreference object. |
范例
Example #1 MongoDB\Driver\Manager::executeQuery() example
<?php$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");$bulk = new MongoDB\Driver\BulkWrite;$bulk->insert(['x' => 1]);$bulk->insert(['x' => 2]);$bulk->insert(['x' => 3]);$manager->executeBulkWrite('db.collection', $bulk);$filter = ['x' => ['$gt' => 1]];$options = [ 'projection' => ['_id' => 0], 'sort' => ['x' => -1],];$query = new MongoDB\Driver\Query($filter, $options);$cursor = $manager->executeQuery('db.collection', $query);foreach ($cursor as $document) { var_dump($document);}?>
以上例程会输出:
object(stdClass)#6 (1) { ["x"]=> int(3) } object(stdClass)#7 (1) { ["x"]=> int(2) }
Example #2 Limiting execution time for a query
The "maxTimeMS"
MongoDB\Driver\Query option may be used to limit the
execution time of a query. Note that this time limit is enforced on the
server side and does not take network latency into account. See
» Terminate Running Operations
in the MongoDB manual for more information.
<?php$manager = new MongoDB\Driver\Manager('mongodb://localhost:27017');$filter = ['x' => ['$gt' => 1]];$options = [ 'maxTimeMS' => 1000,];$query = new MongoDB\Driver\Query($filter, $options);$cursor = $manager->executeQuery('db.collection', $query);foreach ($cursor as $document) { var_dump($document);}?>
If the query fails to complete after one second of execution time on the server, a MongoDB\Driver\Exception\ExecutionTimeoutException will be thrown.
参见
- MongoDB\Driver\Cursor
- MongoDB\Driver\Query
- MongoDB\Driver\ReadPreference
- MongoDB\Driver\Server::executeQuery() - Execute a database query on this server