Struct Client 

pub struct Client { /* private fields */ }

Client which is used to query picodata.

Implementations

impl Client

pub async fn new(config: Config) -> Result<Self, Error>

Creates a new instance of picodata client.

Parameters

• config: A config for a client.

Errors

• Any Error than manager initializer may return.

Returns

An instance of Client on success or an Error if manager init did fail.

pub async fn new_with_strategy<S>( config: Config, strategy: S, ) -> Result<Self, Error>

where S: Strategy,

Creates a new instance of picodata client with a custom strategy.

Parameters

• config: A config for a client.
• strategy: A strategy that descibes the method to pick next connection.

Errors

• Any Error than manager initializer may return.

Returns

An instance of Client on success or an Error if manager init did fail.

pub async fn query( &self, sql: &str, params: &[&(dyn ToSql + Sync)], ) -> Result<Vec<Row>, Error>

Query picodata cluster.

Parameters

• sql: A query to execute.
• params: A query bind params.

Errors

• Error::Postgres in case of failed query exeuction.
• Error::PostgresPool in case of failed connection acquire.

Returns

A vector of rows in case of success or an Error otherwise.

pub async fn execute( &self, sql: &str, params: &[&(dyn ToSql + Sync)], ) -> Result<u64, Error>

Execute on picodata cluster.

Parameters

• sql: A query to execute.
• params: A query bind params.

Errors

• Error::Postgres in case of failed query exeuction.
• Error::PostgresPool in case of failed connection acquire.

Returns

A unit in case of success or an Error otherwise.

pub async fn ping(&self) -> Result<(), Error>

Ping each instance of picodata cluster.

Errors

• Error::Postgres in case of failed query exeuction.
• Error::PostgresPool in case of failed connection acquire.

Returns

A unit in case of success or an Error otherwise.

pub async fn close(&self) -> Result<(), Error>

Closes pool manager.

Errors

• Any Error that manager may return.

Returns

A unit in case of success or an Error otherwise.

Trait Implementations

impl Clone for Client

fn clone(&self) -> Client

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.