Struct Query 

pub struct Query { /* private fields */ }

Query object

Implementations

impl Query

pub fn new<T: Into<String>>(query: T) -> Self

Create query with query text

pub fn with_params(self, params: HashMap<String, Value>) -> Self

Set query parameters

parameters is data, sent to YDB in binary form

Example with macros:

let query = Query::new("
DECLARE $val AS Int64;

SELECT $val AS res
").with_params(ydb_params!("$val" => 123 as i64));

Example full:

let mut params: HashMap::<String,Value> = HashMap::new();
params.insert("$val".to_string(), Value::from(123 as i64));
let query = Query::new("
DECLARE $val AS Int64;

SELECT $val AS res
").with_params(params);

pub fn with_keep_in_cache(self, val: bool) -> Self

Set force keep in cache flag for query. By default flag is true for query with non empty params and false for query without params.

Example:

// force use server cache for the query
let q = Query::new("SELECT 1").with_keep_in_cache(true);

// force disable server cache for the query
 let q = Query::new("
DECLARE $res AS Int64")
.with_params(ydb_params!("$val" => 123 as i64))
.with_keep_in_cache(false);

Trait Implementations

impl Clone for Query

fn clone(&self) -> Query

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl From<&str> for Query

fn from(s: &str) -> Self

Converts to this type from the input type.

impl From<String> for Query

fn from(s: String) -> Self

Converts to this type from the input type.

impl FromStr for Query

type Err = YdbError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.