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.TH "MONGOC_COLLECTION_UPDATE_MANY" "3" "May 07, 2024" "1.27.1" "libmongoc"
.SH SYNOPSIS
.INDENT 0.0
.INDENT 3.5
.sp
.EX
bool
mongoc_collection_update_many (mongoc_collection_t *collection,
                               const bson_t *selector,
                               const bson_t *update,
                               const bson_t *opts,
                               bson_t *reply,
                               bson_error_t *error);
.EE
.UNINDENT
.UNINDENT
.SH PARAMETERS
.INDENT 0.0
.IP \(bu 2
\fBcollection\fP: A \fI\%mongoc_collection_t\fP\&.
.IP \(bu 2
\fBselector\fP: A \fI\%bson_t\fP containing the query to match documents for updating.
.IP \(bu 2
\fBupdate\fP: A \fI\%bson_t\fP containing the update to perform. If updating with a pipeline, a \fI\%bson_t\fP array.
.IP \(bu 2
\fBreply\fP: A maybe\-\fBNULL\fP pointer to \fI\%overwritable storage\fP for a \fI\%bson_t\fP to contain the results.
.IP \(bu 2
\fBerror\fP: An optional location for a \fI\%bson_error_t\fP or \fBNULL\fP\&.
.UNINDENT
.sp
\fBopts\fP may be NULL or a BSON document with additional command options:
.INDENT 0.0
.IP \(bu 2
\fBwriteConcern\fP: Construct a \fI\%mongoc_write_concern_t\fP and use \fI\%mongoc_write_concern_append()\fP to add the write concern to \fBopts\fP\&. See the example code for \fI\%mongoc_client_write_command_with_opts()\fP\&.
.IP \(bu 2
\fBsessionId\fP: First, construct a \fI\%mongoc_client_session_t\fP with \fI\%mongoc_client_start_session()\fP\&. You can begin a transaction with \fI\%mongoc_client_session_start_transaction()\fP, optionally with a \fI\%mongoc_transaction_opt_t\fP that overrides the options inherited from \fBcollection\fP, and use \fI\%mongoc_client_session_append()\fP to add the session to \fBopts\fP\&. See the example code for \fI\%mongoc_client_session_t\fP\&.
.IP \(bu 2
\fBvalidate\fP: Construct a bitwise\-or of all desired \fI\%bson_validate_flags_t\fP\&. Set to \fBfalse\fP to skip client\-side validation of the provided BSON documents.
.IP \(bu 2
\fBcomment\fP: A \fI\%bson_value_t\fP specifying the comment to attach to this command. The comment will appear in log messages, profiler output, and currentOp output. Requires MongoDB 4.4 or later.
.IP \(bu 2
\fBbypassDocumentValidation\fP: Set to \fBtrue\fP to skip server\-side schema validation of the provided BSON documents.
.IP \(bu 2
\fBcollation\fP: Configure textual comparisons. See \fI\%Setting Collation Order\fP, and \fI\%the MongoDB Manual entry on Collation\fP\&. Collation requires MongoDB 3.2 or later, otherwise an error is returned.
.IP \(bu 2
\fBhint\fP: A document or string that specifies the index to use to support the query predicate.
.IP \(bu 2
\fBupsert\fP: When true, creates a new document if no document matches the query.
.IP \(bu 2
\fBlet\fP: A BSON document consisting of any number of parameter names, each followed by definitions of constants in the MQL Aggregate Expression language.
.IP \(bu 2
\fBarrayFilters\fP: An array of filters specifying to which array elements an update should apply.
.UNINDENT
.SH DESCRIPTION
.sp
This function updates all documents in \fBcollection\fP that match \fBselector\fP\&.
.sp
To update at most one document see \fI\%mongoc_collection_update_one()\fP\&.
.sp
If you pass a non\-NULL \fBreply\fP, it is filled out with fields  \fBmatchedCount\fP, \fBmodifiedCount\fP, and optionally \fBupsertedId\fP if applicable. If there is a server error then \fBreply\fP contains either a \(dqwriteErrors\(dq array with one subdocument or a \(dqwriteConcernErrors\(dq array. The reply must be freed with \fI\%bson_destroy()\fP\&.
.SH ERRORS
.sp
Errors are propagated via the \fBerror\fP parameter.
.SH RETURNS
.sp
Returns \fBtrue\fP if successful. Returns \fBfalse\fP and sets \fBerror\fP if there are invalid arguments or a server or network error.
.sp
A write concern timeout or write concern error is considered a failure.
.sp
\fBSEE ALSO:\fP
.INDENT 0.0
.INDENT 3.5
.nf
\fI\%MongoDB update command documentation\fP for more information on the update options.
.fi
.sp
.nf
\fI\%mongoc_collection_update_one()\fP
.fi
.sp
.UNINDENT
.UNINDENT
.SH AUTHOR
MongoDB, Inc
.SH COPYRIGHT
2017-present, MongoDB, Inc
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