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use std::collections::HashMap;
/**
* [Database Connection Control Functions](https://www.postgresql.org/docs/current/libpq-connect.html)
*/
impl Connection {
/**
* Makes a new connection to the database server.
*
* See
* [PQconnectdb](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQCONNECTDB).
*/
pub fn new(dsn: &str) -> crate::errors::Result<Self> {
log::trace!("Connecting to '{dsn}'");
let c_dsn = crate::ffi::to_cstr(dsn);
unsafe { pq_sys::PQconnectdb(c_dsn.as_ptr()) }.try_into()
}
/**
* Makes a new connection to the database server.
*
* See [PQconnectdbParams](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQCONNECTDBPARAMS).
*/
pub fn with_params(
params: &std::collections::HashMap<&str, &str>,
expand_dbname: bool,
) -> crate::errors::Result<Self> {
log::trace!("Connecting with params {params:?}");
let (_c_keywords, ptr_keywords) = crate::ffi::vec_to_nta(¶ms.keys().collect::<Vec<_>>());
let (_c_values, ptr_values) = crate::ffi::vec_to_nta(¶ms.values().collect::<Vec<_>>());
unsafe {
pq_sys::PQconnectdbParams(ptr_keywords.as_ptr(), ptr_values.as_ptr(), expand_dbname as i32)
}
.try_into()
}
/**
* Make a connection to the database server in a nonblocking manner.
*
* See [PQconnectStart](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQCONNECTSTART).
*/
pub fn start(conninfo: &str) -> crate::errors::Result<Self> {
log::trace!("Starting connection to '{conninfo}'");
let c_conninfo = crate::ffi::to_cstr(conninfo);
unsafe { pq_sys::PQconnectStart(c_conninfo.as_ptr()) }.try_into()
}
/**
* Make a connection to the database server in a nonblocking manner.
*
* See [PQconnectStartParams](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQCONNECTSTARTPARAMS).
*/
pub fn start_params(
params: &std::collections::HashMap<String, String>,
expand_dbname: bool,
) -> crate::errors::Result<Self> {
log::trace!("Starting connection with params {params:?}");
let (_c_keywords, ptr_keywords) = crate::ffi::vec_to_nta(¶ms.keys().collect::<Vec<_>>());
let (_c_values, ptr_values) = crate::ffi::vec_to_nta(¶ms.values().collect::<Vec<_>>());
unsafe {
pq_sys::PQconnectStartParams(ptr_keywords.as_ptr(), ptr_values.as_ptr(), expand_dbname as i32)
}
.try_into()
}
/**
* Makes a new connection to the database server.
*
* See [PQsetdb](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQSETDB).
*/
pub fn set_db(
host: Option<&str>,
port: Option<&str>,
options: Option<&str>,
tty: Option<&str>,
db_name: Option<&str>,
) -> crate::errors::Result<Self> {
Self::login(host, port, options, tty, db_name, None, None)
}
/**
* Makes a new connection to the database server.
*
* See
* [PQsetdbLogin](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQSETDBLOGIN).
*/
pub fn login(
host: Option<&str>,
port: Option<&str>,
options: Option<&str>,
tty: Option<&str>,
db_name: Option<&str>,
login: Option<&str>,
pwd: Option<&str>,
) -> crate::errors::Result<Self> {
let c_host = crate::ffi::to_cstr(host.unwrap_or_default());
let c_port = crate::ffi::to_cstr(port.unwrap_or_default());
let c_options = crate::ffi::to_cstr(options.unwrap_or_default());
let c_tty = crate::ffi::to_cstr(tty.unwrap_or_default());
let c_db_name = crate::ffi::to_cstr(db_name.unwrap_or_default());
let c_login = crate::ffi::to_cstr(login.unwrap_or_default());
let c_pwd = crate::ffi::to_cstr(pwd.unwrap_or_default());
unsafe {
pq_sys::PQsetdbLogin(
c_host.as_ptr(),
c_port.as_ptr(),
c_options.as_ptr(),
c_tty.as_ptr(),
c_db_name.as_ptr(),
c_login.as_ptr(),
c_pwd.as_ptr(),
)
}
.try_into()
}
/**
* See [PQconnectPoll](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQCONNECTPOLL).
*/
pub fn poll(&self) -> crate::poll::Status {
unsafe { pq_sys::PQconnectPoll(self.into()) }.into()
}
/**
* Resets the communication channel to the server.
*
* See [PQreset](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQRESET).
*/
pub fn reset(&self) {
unsafe { pq_sys::PQreset(self.into()) };
}
/**
* Reset the communication channel to the server, in a nonblocking manner.
*
* See [PQresetStart](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQRESETSTART).
*/
pub fn reset_start(&self) {
unsafe { pq_sys::PQresetStart(self.into()) };
}
/**
* See
* [PQresetPoll](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQRESETPOLL).
*/
pub fn reset_poll(&self) -> crate::poll::Status {
unsafe { pq_sys::PQresetPoll(self.into()) }.into()
}
/**
* Reports the status of the server.
*
* It accepts connection parameters identical to those of `libpq::Connection::with_params`. It
* is not necessary to supply correct user name, password, or database name values to obtain
* the server status; however, if incorrect values are provided, the server will log a failed
* connection attempt.
*
* See [PQpingParams](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQPINGPARAMS).
*/
pub fn ping_params(
params: &std::collections::HashMap<String, String>,
expand_dbname: bool,
) -> crate::ping::Status {
log::trace!("Ping with params {params:?}");
let (_c_keywords, ptr_keywords) = crate::ffi::vec_to_nta(¶ms.keys().collect::<Vec<_>>());
let (_c_values, ptr_values) = crate::ffi::vec_to_nta(¶ms.values().collect::<Vec<_>>());
unsafe { pq_sys::PQpingParams(ptr_keywords.as_ptr(), ptr_values.as_ptr(), expand_dbname as i32) }
.into()
}
/**
* Reports the status of the server.
*
* It accepts connection parameters identical to those of `libpq::Connection::new`. It is not
* necessary to supply correct user name, password, or database name values to obtain the
* server status; however, if incorrect values are provided, the server will log a failed
* connection attempt.
*
* See [PQping](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQPING).
*/
pub fn ping(dsn: &str) -> crate::ping::Status {
log::trace!("Ping '{dsn}'");
let c_dsn = crate::ffi::to_cstr(dsn);
unsafe { pq_sys::PQping(c_dsn.as_ptr()) }.into()
}
/**
* Return the connection options used for the connection
*
* See
* [PQconninfo](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PQCONNINFO).
*/
pub fn info(&self) -> crate::errors::Result<HashMap<String, crate::connection::Info>> {
let mut infos = HashMap::new();
unsafe {
let mut i = 0;
let raw = pq_sys::PQconninfo(self.into());
loop {
let current = raw.offset(i);
if (*current).keyword.is_null() {
break;
}
let info: crate::connection::Info = current.try_into()?;
infos.insert(info.keyword.clone(), info);
i += 1;
}
pq_sys::PQconninfoFree(raw);
}
Ok(infos)
}
}