Struct diesel::backend::sql_dialect::from_clause_syntax::AnsiSqlFromClauseSyntax

pub struct AnsiSqlFromClauseSyntax;

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Indicates that this backend skips the FROM clause in SELECT statements if no table/view is queried

Trait Implementations

impl Clone for AnsiSqlFromClauseSyntax

fn clone(&self) -> AnsiSqlFromClauseSyntax

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AnsiSqlFromClauseSyntax

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

Formats the value using the given formatter.

impl<DB> QueryFragment<DB, AnsiSqlFromClauseSyntax> for NoFromClausewhere DB: Backend<EmptyFromClauseSyntax = AnsiSqlFromClauseSyntax>,

fn walk_ast<'b>(&'b self, _pass: AstPass<'_, 'b, DB>) -> QueryResult<()>

Walk over this QueryFragment for all passes.

fn to_sql(&self, out: &mut DB::QueryBuilder, backend: &DB) -> QueryResult<()>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Converts this QueryFragment to its SQL representation.

fn collect_binds<'b>( &'b self, out: &mut <DB as HasBindCollector<'b>>::BindCollector, metadata_lookup: &mut DB::MetadataLookup, backend: &'b DB ) -> QueryResult<()>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Serializes all bind parameters in this query.

fn is_safe_to_cache_prepared(&self, backend: &DB) -> QueryResult<bool>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Is this query safe to store in the prepared statement cache?

fn is_noop(&self, backend: &DB) -> QueryResult<bool>

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Does walking this AST have any effect?

impl Copy for AnsiSqlFromClauseSyntax