Enum SqlPredicate 

pub enum SqlPredicate {
    Comparison {
        left: Box<SqlExpression>,
        operator: SqlComparisonOperator,
        right: Box<SqlExpression>,
    },
    Null {
        expression: Box<SqlExpression>,
        operator: SqlNullOperator,
    },
    Pattern {
        left: Box<SqlExpression>,
        operator: SqlPatternOperator,
        right: Box<SqlExpression>,
    },
    Logical {
        left: Box<Self>,
        operator: SqlLogicalOperator,
        right: Box<Self>,
    },
    Not(Box<Self>),
}

Lightweight SQL predicate containers.

Variants

Comparison

Fields

left: Box<SqlExpression>

operator: SqlComparisonOperator

right: Box<SqlExpression>

Null

Fields

expression: Box<SqlExpression>

operator: SqlNullOperator

Pattern

Fields

left: Box<SqlExpression>

operator: SqlPatternOperator

right: Box<SqlExpression>

Logical

Fields

left: Box<Self>

operator: SqlLogicalOperator

right: Box<Self>

Not(Box<Self>)

Implementations

impl SqlPredicate

pub fn comparison( left: SqlExpression, operator: SqlComparisonOperator, right: SqlExpression, ) -> Self

Creates a comparison predicate.

pub fn null(expression: SqlExpression, operator: SqlNullOperator) -> Self

Creates a null-check predicate.

pub fn pattern( left: SqlExpression, operator: SqlPatternOperator, right: SqlExpression, ) -> Self

Creates a pattern or membership predicate.

pub fn logical(left: Self, operator: SqlLogicalOperator, right: Self) -> Self

Creates a logical predicate.

pub fn negate(predicate: Self) -> Self

Creates a negated predicate.

Trait Implementations

impl Clone for SqlPredicate

fn clone(&self) -> SqlPredicate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SqlPredicate

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

Formats the value using the given formatter.

impl Display for SqlPredicate

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

Formats the value using the given formatter.

impl Hash for SqlPredicate

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SqlPredicate

fn cmp(&self, other: &SqlPredicate) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SqlPredicate

fn eq(&self, other: &SqlPredicate) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for SqlPredicate

fn partial_cmp(&self, other: &SqlPredicate) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for SqlPredicate

impl StructuralPartialEq for SqlPredicate