Struct sql_parser::ast::defs::ddl::ColumnOptionDef

pub struct ColumnOptionDef<T: AstInfo> {
    pub name: Option<Ident>,
    pub option: ColumnOption<T>,
}

An optionally-named ColumnOption: [ CONSTRAINT <name> ] <column-option>.

Note that implementations are substantially more permissive than the ANSI specification on what order column options can be presented in, and whether they are allowed to be named. The specification distinguishes between constraints (NOT NULL, UNIQUE, PRIMARY KEY, and CHECK), which can be named and can appear in any order, and other options (DEFAULT, GENERATED), which cannot be named and must appear in a fixed order. PostgreSQL, however, allows preceding any option with CONSTRAINT <name>, even those that are not really constraints, like NULL and DEFAULT. MSSQL is less permissive, allowing DEFAULT, UNIQUE, PRIMARY KEY and CHECK to be named, but not NULL or NOT NULL constraints (the last of which is in violation of the spec).

For maximum flexibility, we don’t distinguish between constraint and non-constraint options, lumping them all together under the umbrella of “column options,” and we allow any column option to be named.

Fields

name: Option<Ident>

option: ColumnOption<T>

Trait Implementations

impl<T: AstInfo> AstDisplay for ColumnOptionDef<T>

fn fmt<W: Write>(&self, f: &mut AstFormatter<W>)

fn to_ast_string(&self) -> String

fn to_ast_string_stable(&self) -> String

impl<T: Clone + AstInfo> Clone for ColumnOptionDef<T>

fn clone(&self) -> ColumnOptionDef<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug + AstInfo> Debug for ColumnOptionDef<T>

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

Formats the value using the given formatter.

impl<T: AstInfo> Display for ColumnOptionDef<T>

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

Formats the value using the given formatter.

impl<T: Hash + AstInfo> Hash for ColumnOptionDef<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<T: PartialEq + AstInfo> PartialEq<ColumnOptionDef<T>> for ColumnOptionDef<T>

fn eq(&self, other: &ColumnOptionDef<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ColumnOptionDef<T>) -> bool

This method tests for !=.

impl<T: Eq + AstInfo> Eq for ColumnOptionDef<T>

impl<T: AstInfo> StructuralEq for ColumnOptionDef<T>

impl<T: AstInfo> StructuralPartialEq for ColumnOptionDef<T>