MongoDB\Driver\ClientEncryption::encryptExpression

    (mongodb >=1.16.0)

    MongoDB\Driver\ClientEncryption::encryptExpression — Encrypts a match or aggregate expression

    Description

    final public MongoDB\Driver\ClientEncryption::encryptExpression(array|object $expr, ?array $options = null): object

    Encrypts a match or aggregate expression to query a range index.

    To query with a range encrypted payload, the MongoDB\Driver\Manager must be configured with the "autoEncryption" driver option. The "bypassQueryAnalysis" auto encryption option may be true. The "bypassAutoEncryption" auto encryption option must be false.

    Note:

    The range algorithm is experimental only. It is not intended for public use.

    The extension does not yet support range queries for Decimal128 BSON field types.

    Parameters

    expr

    The match or aggregate expression to be encrypted. Expressions must use at least one of the $gt, $gte, $lt, or $lte operators. A top-level $and operator is required, even if only a single comparison operator is used.

    An example of a supported match expression (applies to queries and the $match aggregation stage) is as follows: 

    [
    '$and' => [
        [ '<field>' => [ '$gt'  => '<value1>' ] ],
        [ '<field>' => [ '$lte' => '<value2>' ] ],
    ],
]

    An example of a supported aggregate expression is as follows: 

    [
    '$and' => [
        [ '$gte' => [ '<fieldPath>', '<value1>' ] ],
        [ '$lt'  => [ '<fieldPath>', '<value2>' ] ],
    ],
]
    options

    Encryption options
    Option Type Description
    algorithm string

    The encryption algorithm to be used. This option is required. Specify one of the following ClientEncryption constants:

    contentionFactor int

    The contention factor for evaluating queries with indexed, encrypted payloads.

    This option only applies and may only be specified when algorithm is MongoDB\Driver\ClientEncryption::ALGORITHM_INDEXED or MongoDB\Driver\ClientEncryption::ALGORITHM_RANGE.

    keyAltName string

    Identifies a key vault collection document by keyAltName. This option is mutually exclusive with keyId and exactly one is required.

    keyId MongoDB\BSON\Binary

    Identifies a data key by _id. The value is a UUID (binary subtype 4). This option is mutually exclusive with keyAltName and exactly one is required.

    queryType string

    The query type for evaluating queries with indexed, encrypted payloads. Specify one of the following ClientEncryption constants:

    This option only applies and may only be specified when algorithm is MongoDB\Driver\ClientEncryption::ALGORITHM_INDEXED or MongoDB\Driver\ClientEncryption::ALGORITHM_RANGE.

    rangeOpts array

    Index options for a queryable encryption field supporting "range" queries. The options below must match the values set in the encryptedFields of the target collection. For double and decimal128 BSON field types, min, max, and precision must all be set, or all be unset.

    Range index options
    Option Type Description
    min mixed Required if precision is set. The minimum BSON value of the range.
    max mixed Required if precision is set. The maximum BSON value of the range.
    sparsity int Required. Positive 64-bit integer.
    precision int Optional. Positive 32-bit integer specifying precision to use for explicit encryption. May only be set for double or decimal128 BSON field types.
    trimFactor int Required. Positive 32-bit integer.

    Return Values

    Returns the encrypted expression as an object.

    Errors/Exceptions

    See Also

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