Struct Savepoint 

pub struct Savepoint {
    pub depth: usize,
    /* private fields */
}

Available on crate feature database and non-WebAssembly only.

Savepoint for nested transactions

Savepoint names are validated at construction to prevent SQL injection. Only alphanumeric characters and underscores are allowed (must not start with a digit). SQL output uses quoted identifiers for defense-in-depth.

Fields

depth: usize

The depth.

Implementations

impl Savepoint

pub fn new(name: impl Into<String>, depth: usize) -> Savepoint

Create a new savepoint with name and depth

Panics

Panics if the name contains invalid characters. Only alphanumeric characters and underscores are allowed (must not start with a digit).

Examples

use reinhardt_db::orm::transaction::Savepoint;

let sp = Savepoint::new("my_savepoint", 1);
assert_eq!(sp.name(), "my_savepoint");
assert_eq!(sp.depth, 1);

pub fn name(&self) -> &str

Get the savepoint name

pub fn to_sql(&self) -> String

Generate SQL for creating this savepoint

Examples

use reinhardt_db::orm::transaction::Savepoint;

let sp = Savepoint::new("checkpoint_1", 2);
assert_eq!(sp.to_sql(), r#"SAVEPOINT "checkpoint_1""#);

pub fn release_sql(&self) -> String

Generate SQL for releasing this savepoint

Examples

use reinhardt_db::orm::transaction::Savepoint;

let sp = Savepoint::new("checkpoint_1", 2);
assert_eq!(sp.release_sql(), r#"RELEASE SAVEPOINT "checkpoint_1""#);

pub fn rollback_sql(&self) -> String

Generate SQL for rolling back to this savepoint

Examples

use reinhardt_db::orm::transaction::Savepoint;

let sp = Savepoint::new("checkpoint_1", 2);
assert_eq!(sp.rollback_sql(), r#"ROLLBACK TO SAVEPOINT "checkpoint_1""#);

Trait Implementations

impl Clone for Savepoint

fn clone(&self) -> Savepoint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Savepoint

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.