[−][src]Struct sqlparser::ast::ColumnOptionDef
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
Trait Implementations
impl Clone for ColumnOptionDef
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fn clone(&self) -> ColumnOptionDef
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fn clone_from(&mut self, source: &Self)
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impl Debug for ColumnOptionDef
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impl Display for ColumnOptionDef
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impl Eq for ColumnOptionDef
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impl Hash for ColumnOptionDef
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fn hash<__H: Hasher>(&self, state: &mut __H)
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl PartialEq<ColumnOptionDef> for ColumnOptionDef
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fn eq(&self, other: &ColumnOptionDef) -> bool
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fn ne(&self, other: &ColumnOptionDef) -> bool
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impl StructuralEq for ColumnOptionDef
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impl StructuralPartialEq for ColumnOptionDef
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Auto Trait Implementations
impl RefUnwindSafe for ColumnOptionDef
impl Send for ColumnOptionDef
impl Sync for ColumnOptionDef
impl Unpin for ColumnOptionDef
impl UnwindSafe for ColumnOptionDef
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,