Trait Dialect 

pub trait Dialect {
    // Required methods
    fn render_select(&self, select: &Select) -> Result<Sql>;
    fn render_insert(&self, insert: &Insert) -> Result<Sql>;
    fn render_update(&self, update: &Update) -> Result<Sql>;
    fn render_delete(&self, delete: &Delete) -> Result<Sql>;

    // Provided methods
    fn supports_returning(&self) -> bool { ... }
    fn render_select_owned(&self, select: Select) -> Result<Sql> { ... }
    fn render_insert_owned(&self, insert: Insert) -> Result<Sql> { ... }
    fn render_update_owned(&self, update: Update) -> Result<Sql> { ... }
    fn render_delete_owned(&self, delete: Delete) -> Result<Sql> { ... }
}

Trait for SQL dialect renderers.

Allows rendering AST queries into dialect-specific SQL strings.

Required Methods

fn render_select(&self, select: &Select) -> Result<Sql>

Render a SELECT query into SQL.

fn render_insert(&self, insert: &Insert) -> Result<Sql>

Render an INSERT query into SQL.

fn render_update(&self, update: &Update) -> Result<Sql>

Render an UPDATE query into SQL.

fn render_delete(&self, delete: &Delete) -> Result<Sql>

Render a DELETE query into SQL.

Provided Methods

fn supports_returning(&self) -> bool

Whether this dialect natively supports the RETURNING clause on INSERT, UPDATE, and DELETE statements.

Dialects that return false (e.g. MySQL) will have RETURNING emulated at the connector layer via separate queries.

fn render_select_owned(&self, select: Select) -> Result<Sql>

Render an owned SELECT query into SQL, allowing dialects to move bound values out of the AST instead of cloning them.

fn render_insert_owned(&self, insert: Insert) -> Result<Sql>

Render an owned INSERT query into SQL, allowing dialects to move bound values out of the AST instead of cloning them.

fn render_update_owned(&self, update: Update) -> Result<Sql>

Render an owned UPDATE query into SQL, allowing dialects to move bound values out of the AST instead of cloning them.

fn render_delete_owned(&self, delete: Delete) -> Result<Sql>

Render an owned DELETE query into SQL, allowing dialects to move bound values out of the AST instead of cloning them.

Implementors

impl Dialect for MysqlDialect

Renders query ASTs into MySQL-compatible SQL with ? placeholders and backtick-quoted identifiers.

impl Dialect for PostgresDialect

impl Dialect for SqliteDialect

Renders query ASTs into SQLite-compatible SQL with ? placeholders and double-quoted identifiers.