MongoDB\Driver\Manager::startSession

(mongodb >=1.4.0)

MongoDB\Driver\Manager::startSessionStart a new client session for use with this client

Descripción

final public MongoDB\Driver\Manager::startSession(array $options = ?): MongoDB\Driver\Session

Creates a MongoDB\Driver\Session for the given options. The session may then be specified when executing commands, queries, and write operations.

Nota: A MongoDB\Driver\Session can only be used with the MongoDB\Driver\Manager from which it was created.

Parámetros

options

options
Option Type Description Default
causalConsistency bool

Configure causal consistency in a session. If true, each operation in the session will be causally ordered after the previous read or write operation. Set to false to disable causal consistency.

See » Casual Consistency in the MongoDB manual for more information.

true
defaultTransactionOptions array

Default options to apply to newly created transactions. These options are used unless they are overridden when a transaction is started with different value for each option.

options
Option Type Description
maxCommitTimeMS integer

The maximum amount of time in milliseconds to allow a single commitTransaction command to run.

If specified, maxCommitTimeMS must be a signed 32-bit integer greater than or equal to zero.

readConcern MongoDB\Driver\ReadConcern

Un asunto de escritura a aplicar a la operación.

Esta opción está disponible en MongoDB 3.2+ y resultará en una excepción en tiempo de ejecución si es especificada para una versión de servidor más antigua.

readPreference MongoDB\Driver\ReadPreference

Una preferencia de lectura a usar para seleccionar un servidor para la operación.

writeConcern MongoDB\Driver\WriteConcern

Un asunto de escritura a aplicar a la operación.

This option is available in MongoDB 4.0+.

[]
snapshot bool

Configure snapshot reads in a session. If true, a timestamp will be obtained from the first supported read operation in the session (i.e. find, aggregate, or unsharded distinct). Subsequent read operations within the session will then utilize a "snapshot" read concern level to read majority-committed data from that timestamp. Set to false to disable snapshot reads.

Snapshot reads require MongoDB 5.0+ and cannot be used with causal consistency, transactions, or write operations. If "snapshot" is true, "causalConsistency" will default to false.

See » Read Concern "snapshot" in the MongoDB manual for more information.

false

Valores devueltos

Returns a MongoDB\Driver\Session.

Errores/Excepciones

Historial de cambios

Versión Descripción
PECL mongodb 1.11.0

The "snapshot" option was added.

PECL mongodb 1.6.0

The "maxCommitTimeMS" option was added to "defaultTransactionOptions".

PECL mongodb 1.5.0

The "defaultTransactionOptions" option was added.

Ver también

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top