GoLang MongoDB\Driver\Server::executeCommand

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PHP MongoDB\Driver\Server::executeCommand

PHP original manual for MongoDB\Driver\Server::executeCommand [ show | php.net ]

MongoDB\Driver\Server::executeCommand

(mongodb >=1.0.0)

MongoDB\Driver\Server::executeCommand — Execute a database command on this server

Description

final public MongoDB\Driver\Cursor MongoDB\Driver\Server::executeCommand ( string $db , MongoDB\Driver\Command $command [, array $options = array() ] )

Executes the command on this server.

This method applies no special logic to the command. Although this method accepts "readConcern" and "writeConcern" options, which will be incorporated into the command document, those options will not default to corresponding values from the MongoDB Connection URI nor will the MongoDB server version be taken into account. Users are therefore encouraged to use specific read and/or write command methods if possible.

Note: The "readPreference" option does not control the server to which the driver issues the operation; it will always be executed on this server object. Instead, it may be used when issuing the operation to a secondary (from a replica set connection, not standalone) or mongos node to ensure that the driver sets the wire protocol accordingly or adds the read preference to the operation, respectively.

Parameters

db (string)

The name of the database on which to execute the command.

command (MongoDB\Driver\Command)

The command to execute.

options

options
Option Type Description
readConcern MongoDB\Driver\ReadConcern

A read concern to apply to the operation.

This option is available in MongoDB 3.2+ and will result in an exception at execution time if specified for an older server version.

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.

writeConcern MongoDB\Driver\WriteConcern

A write concern to apply to the operation.

Return Values

Returns MongoDB\Driver\Cursor on success.

Errors/Exceptions

Changelog

Version Description
1.4.0 The third parameter is now an options array. For backwards compatibility, this paramater will still accept a MongoDB\Driver\ReadPreference object.

Notes

Note: It is the caller's responsibility to ensure that the server is capable of executing the write operation. For example, executing a write operation on a secondary (excluding its "local" database) will fail.

See Also