pub enum ExpressionKind<'a> {
Show 14 variants
Parameterized(Value),
Raw(&'a str),
Column(Box<Column<'a>>),
Table(Box<Table<'a>>),
Row(Row<'a>),
Selection(Box<Select<'a>>),
Function(Box<Function<'a>>),
Asterisk(Option<Box<Table<'a>>>),
Op(Box<SqlOp<'a>>),
ConditionTree(ConditionTree<'a>),
Compare(Compare<'a>),
Value(Box<Expression<'a>>),
Values(Values<'a>),
Default,
}
Expand description
An expression we can compare and use in database queries.
Variants§
Parameterized(Value)
Anything that we must parameterize before querying
Raw(&'a str)
Will be rendered as-is to the SQL statement. Carefully escape, if needed.
Column(Box<Column<'a>>)
A database column
Table(Box<Table<'a>>)
A database column
Row(Row<'a>)
Data in a row form, e.g. (1, 2, 3)
Selection(Box<Select<'a>>)
A nested SELECT
or SELECT .. UNION
statement
Function(Box<Function<'a>>)
A database function call
Asterisk(Option<Box<Table<'a>>>)
A qualified asterisk to a table
Op(Box<SqlOp<'a>>)
An operation: sum, sub, mul or div.
ConditionTree(ConditionTree<'a>)
A tree of expressions to evaluate from the deepest value to up
Compare(Compare<'a>)
A comparison expression
Value(Box<Expression<'a>>)
A single value, column, row or a nested select
Values(Values<'a>)
Multiple values
Default
DEFAULT keyword, e.g. for INSERT INTO ... VALUES (..., DEFAULT, ...)
Trait Implementations§
Source§impl<'a> Clone for ExpressionKind<'a>
impl<'a> Clone for ExpressionKind<'a>
Source§fn clone(&self) -> ExpressionKind<'a>
fn clone(&self) -> ExpressionKind<'a>
Returns a copy of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreSource§impl<'a> Debug for ExpressionKind<'a>
impl<'a> Debug for ExpressionKind<'a>
Source§impl<'a> From<ExpressionKind<'a>> for Expression<'a>
impl<'a> From<ExpressionKind<'a>> for Expression<'a>
Source§fn from(kind: ExpressionKind<'a>) -> Self
fn from(kind: ExpressionKind<'a>) -> Self
Converts to this type from the input type.
Source§impl<'a> PartialEq for ExpressionKind<'a>
impl<'a> PartialEq for ExpressionKind<'a>
impl<'a> StructuralPartialEq for ExpressionKind<'a>
Auto Trait Implementations§
impl<'a> Freeze for ExpressionKind<'a>
impl<'a> RefUnwindSafe for ExpressionKind<'a>
impl<'a> Send for ExpressionKind<'a>
impl<'a> Sync for ExpressionKind<'a>
impl<'a> Unpin for ExpressionKind<'a>
impl<'a> UnwindSafe for ExpressionKind<'a>
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<'a, T> Conjunctive<'a> for Twhere
T: Into<Expression<'a>>,
impl<'a, T> Conjunctive<'a> for Twhere
T: Into<Expression<'a>>,
Source§fn and<E>(self, other: E) -> ConditionTree<'a>where
E: Into<Expression<'a>>,
fn and<E>(self, other: E) -> ConditionTree<'a>where
E: Into<Expression<'a>>,
Builds an
AND
condition having self
as the left leaf and other
as the right.Source§fn or<E>(self, other: E) -> ConditionTree<'a>where
E: Into<Expression<'a>>,
fn or<E>(self, other: E) -> ConditionTree<'a>where
E: Into<Expression<'a>>,
Builds an
OR
condition having self
as the left leaf and other
as the right.Source§fn not(self) -> ConditionTree<'a>
fn not(self) -> ConditionTree<'a>
Builds a
NOT
condition having self
as the condition.