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SqlReader

khive_storage::sql

Trait SqlReader 

Source 
pub trait SqlReader: Send + 'static {
    // Required methods
    fn query_row<'life0, 'async_trait>(
        &'life0 mut self,
        statement: SqlStatement,
    ) -> Pin<Box<dyn Future<Output = StorageResult<Option<SqlRow>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn query_all<'life0, 'async_trait>(
        &'life0 mut self,
        statement: SqlStatement,
    ) -> Pin<Box<dyn Future<Output = StorageResult<Vec<SqlRow>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn query_scalar<'life0, 'async_trait>(
        &'life0 mut self,
        statement: SqlStatement,
    ) -> Pin<Box<dyn Future<Output = StorageResult<Option<SqlValue>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn explain<'life0, 'async_trait>(
        &'life0 mut self,
        statement: SqlStatement,
    ) -> Pin<Box<dyn Future<Output = StorageResult<Vec<SqlRow>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}
Expand description

Read-capable SQL connection.

Required Methods§

Source

fn query_row<'life0, 'async_trait>( &'life0 mut self, statement: SqlStatement, ) -> Pin<Box<dyn Future<Output = StorageResult<Option<SqlRow>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Execute statement and return the first row, or None if the result set is empty.

Source

fn query_all<'life0, 'async_trait>( &'life0 mut self, statement: SqlStatement, ) -> Pin<Box<dyn Future<Output = StorageResult<Vec<SqlRow>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Execute statement and return all rows.

Source

fn query_scalar<'life0, 'async_trait>( &'life0 mut self, statement: SqlStatement, ) -> Pin<Box<dyn Future<Output = StorageResult<Option<SqlValue>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Execute statement and return the first column of the first row as a scalar.

Source

fn explain<'life0, 'async_trait>( &'life0 mut self, statement: SqlStatement, ) -> Pin<Box<dyn Future<Output = StorageResult<Vec<SqlRow>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Run EXPLAIN QUERY PLAN for statement and return the plan rows.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§