Struct MySql 

pub struct MySql;

Trait Implementations

impl Clone for MySql

fn clone(&self) -> MySql

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MySql

impl Debug for MySql

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

Formats the value using the given formatter.

impl Default for MySql

fn default() -> MySql

Returns the “default value” for a type.

impl Dialect for MySql

fn skip_locked(&self) -> (&'static str, &'static str)

The same words PostgreSQL uses, and MySQL 8.0 or newer. skip locked arrived in 8.0; on 5.7 this is a syntax error rather than a silent fallback, which is the better failure — a queue that quietly dropped the skip would run jobs twice.

fn name(&self) -> &'static str

postgres, mysql, sqlserver.

fn quote(&self, identifier: &str) -> String

Wrap one identifier so a keyword or an unusual name is still valid.

fn placeholder(&self, _position: usize) -> String

The placeholder for the position-th bound parameter, counting from 1.

fn column_type(&self, kind: &ColumnType) -> String

The type name for a logical column type.

fn now(&self) -> &'static str

The expression for “now”, used by timestamps().

fn uuid_default(&self) -> Option<&'static str>

The expression that generates a UUID, when the database has one.

fn returning(&self) -> ReturningStyle

How a generated key comes back from an insert.

fn limit_offset( &self, limit: Option<i64>, offset: Option<i64>, _ordered: bool, ) -> String

limit … offset …, in whatever form this database accepts.

fn booleans_are_integers(&self) -> bool

Whether a boolean column really is one.

fn max_identifier_length(&self) -> usize

The longest identifier this database accepts.

fn current_schema_expression(&self) -> &'static str

The expression naming the schema this connection is working in.

fn list_tables_sql(&self) -> &'static str

A query returning one row per table in the current schema, with the name in the first column.

fn disable_foreign_keys_sql(&self) -> Option<&'static str>

Turn off foreign key enforcement while tables are being dropped, so the order they come back in does not matter.

fn enable_foreign_keys_sql(&self) -> Option<&'static str>

fn supports_if_not_exists_table(&self) -> bool

Whether create table if not exists is understood.

fn supports_if_not_exists_index(&self) -> bool

Whether create index if not exists is understood.

fn migrations_table_sql(&self, table: &str) -> String

The DDL for the migration tracking table.

fn add_column_clause(&self) -> &'static str

How a column is added in an alter table.

fn begin_sql(&self) -> &'static str

Start a transaction.

fn commit_sql(&self) -> &'static str

fn rollback_sql(&self) -> &'static str

fn savepoint_sql(&self, name: &str) -> String

fn rollback_to_savepoint_sql(&self, name: &str) -> String

fn drop_table_sql(&self, table: &str) -> String

Drop one table, including anything depending on it.