Struct SqlReadContext 

pub struct SqlReadContext<'connection> { /* private fields */ }

SQL access to one read-only snapshot. The connection and internal tables remain private; even SQL with RETURNING cannot write through this context.

Implementations

impl<'connection> SqlReadContext<'connection>

pub fn query_row<T, P, F>(&self, sql: &str, params: P, map: F) -> Result<T>

where P: Params, F: FnOnce(&Row<'_>) -> Result<T>,

Map the first result row of an ordinary SQL read.

pub fn query<T, P, F>(&self, sql: &str, params: P, map: F) -> Result<Vec<T>>

where P: Params, F: FnMut(&Row<'_>) -> Result<T>,

Map all result rows of an ordinary SQL read.

Trait Implementations

impl SqlRead for SqlReadContext<'_>

fn query_row<T, P, F>(&self, sql: &str, params: P, map: F) -> Result<T>

where P: Params, F: FnOnce(&Row<'_>) -> Result<T>,

Map the first result row.

fn query<T, P, F>(&self, sql: &str, params: P, map: F) -> Result<Vec<T>>

where P: Params, F: FnMut(&Row<'_>) -> Result<T>,

Map all result rows.