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.TH "MONGOC_SESSION_OPTS_SET_DEFAULT_TRANSACTION_OPTS" "3" "Jun 04, 2021" "1.17.6" "libmongoc"
.SH NAME
mongoc_session_opts_set_default_transaction_opts \- mongoc_session_opts_set_default_transaction_opts()
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.SH SYNOPSIS
.INDENT 0.0
.INDENT 3.5
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.nf
.ft C
void
mongoc_session_opts_set_default_transaction_opts (
   mongoc_session_opt_t *opts, const mongoc_transaction_opt_t *txn_opts);
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
Set the default options for transactions started with this session. The \fBtxn_opts\fP argument is copied and can be freed after calling this function.
.sp
When a session is first created with \fBmongoc_client_start_session\fP, it inherits from the client the read concern, write concern, and read preference with which to start transactions. Each of these fields can be overridden independently. Create a \fBmongoc_transaction_opt_t\fP with \fBmongoc_transaction_opts_new\fP, and pass a non\-NULL option to any of the \fBmongoc_transaction_opt_t\fP setter functions:
.INDENT 0.0
.IP \(bu 2
\fBmongoc_transaction_opts_set_read_concern\fP
.IP \(bu 2
\fBmongoc_transaction_opts_set_write_concern\fP
.IP \(bu 2
\fBmongoc_transaction_opts_set_read_prefs\fP
.UNINDENT
.sp
Pass the resulting transaction options to \fBmongoc_session_opts_set_default_transaction_opts\fP\&. Each field set in the transaction options overrides the inherited client configuration. There is an opportunity to override each one of these fields again by passing a \fBmongoc_transaction_opt_t\fP to \fBmongoc_client_session_start_transaction\fP\&.
.SH PARAMETERS
.INDENT 0.0
.IP \(bu 2
\fBopts\fP: A \fBmongoc_session_opt_t\fP\&.
.IP \(bu 2
\fBtxn_opts\fP: A \fBmongoc_transaction_opt_t\fP\&.
.UNINDENT
.SH AUTHOR
MongoDB, Inc
.SH COPYRIGHT
2017-present, MongoDB, Inc
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