databend_common_ast::ast

Enum Expr

Source 
pub enum Expr {

Show 40 variants    ColumnRef {
        span: Span,
        column: ColumnRef,
    },
    IsNull {
        span: Span,
        expr: Box<Expr>,
        not: bool,
    },
    IsDistinctFrom {
        span: Span,
        left: Box<Expr>,
        right: Box<Expr>,
        not: bool,
    },
    InList {
        span: Span,
        expr: Box<Expr>,
        list: Vec<Expr>,
        not: bool,
    },
    InSubquery {
        span: Span,
        expr: Box<Expr>,
        subquery: Box<Query>,
        not: bool,
    },
    LikeSubquery {
        span: Span,
        expr: Box<Expr>,
        subquery: Box<Query>,
        modifier: SubqueryModifier,
        escape: Option<String>,
    },
    LikeAnyWithEscape {
        span: Span,
        left: Box<Expr>,
        right: Box<Expr>,
        escape: String,
    },
    LikeWithEscape {
        span: Span,
        left: Box<Expr>,
        right: Box<Expr>,
        is_not: bool,
        escape: String,
    },
    Between {
        span: Span,
        expr: Box<Expr>,
        low: Box<Expr>,
        high: Box<Expr>,
        not: bool,
    },
    BinaryOp {
        span: Span,
        op: BinaryOperator,
        left: Box<Expr>,
        right: Box<Expr>,
    },
    JsonOp {
        span: Span,
        op: JsonOperator,
        left: Box<Expr>,
        right: Box<Expr>,
    },
    UnaryOp {
        span: Span,
        op: UnaryOperator,
        expr: Box<Expr>,
    },
    Cast {
        span: Span,
        expr: Box<Expr>,
        target_type: TypeName,
        pg_style: bool,
    },
    TryCast {
        span: Span,
        expr: Box<Expr>,
        target_type: TypeName,
    },
    Extract {
        span: Span,
        kind: IntervalKind,
        expr: Box<Expr>,
    },
    DatePart {
        span: Span,
        kind: IntervalKind,
        expr: Box<Expr>,
    },
    Position {
        span: Span,
        substr_expr: Box<Expr>,
        str_expr: Box<Expr>,
    },
    Substring {
        span: Span,
        expr: Box<Expr>,
        substring_from: Box<Expr>,
        substring_for: Option<Box<Expr>>,
    },
    Trim {
        span: Span,
        expr: Box<Expr>,
        trim_where: Option<(TrimWhere, Box<Expr>)>,
    },
    Literal {
        span: Span,
        value: Literal,
    },
    CountAll {
        span: Span,
        qualified: Vec<Indirection>,
        window: Option<Window>,
    },
    Tuple {
        span: Span,
        exprs: Vec<Expr>,
    },
    FunctionCall {
        span: Span,
        func: FunctionCall,
    },
    Case {
        span: Span,
        operand: Option<Box<Expr>>,
        conditions: Vec<Expr>,
        results: Vec<Expr>,
        else_result: Option<Box<Expr>>,
    },
    Exists {
        span: Span,
        not: bool,
        subquery: Box<Query>,
    },
    Subquery {
        span: Span,
        modifier: Option<SubqueryModifier>,
        subquery: Box<Query>,
    },
    MapAccess {
        span: Span,
        expr: Box<Expr>,
        accessor: MapAccessor,
    },
    Array {
        span: Span,
        exprs: Vec<Expr>,
    },
    Map {
        span: Span,
        kvs: Vec<(Literal, Expr)>,
    },
    Interval {
        span: Span,
        expr: Box<Expr>,
        unit: IntervalKind,
    },
    DateAdd {
        span: Span,
        unit: IntervalKind,
        interval: Box<Expr>,
        date: Box<Expr>,
    },
    DateDiff {
        span: Span,
        unit: IntervalKind,
        date_start: Box<Expr>,
        date_end: Box<Expr>,
    },
    DateBetween {
        span: Span,
        unit: IntervalKind,
        date_start: Box<Expr>,
        date_end: Box<Expr>,
    },
    DateSub {
        span: Span,
        unit: IntervalKind,
        interval: Box<Expr>,
        date: Box<Expr>,
    },
    DateTrunc {
        span: Span,
        unit: IntervalKind,
        date: Box<Expr>,
    },
    LastDay {
        span: Span,
        unit: IntervalKind,
        date: Box<Expr>,
    },
    PreviousDay {
        span: Span,
        unit: Weekday,
        date: Box<Expr>,
    },
    NextDay {
        span: Span,
        unit: Weekday,
        date: Box<Expr>,
    },
    Hole {
        span: Span,
        name: String,
    },
    Placeholder {
        span: Span,
    },

}

Variants§

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ColumnRef

Column reference, with indirection like table.column

Fields

§span: Span
§column: ColumnRef
§

IsNull

IS [ NOT ] NULL expression

Fields

§span: Span
§expr: Box<Expr>
§not: bool
§

IsDistinctFrom

IS [NOT] DISTINCT expression

Fields

§span: Span
§left: Box<Expr>
§right: Box<Expr>
§not: bool
§

InList

[ NOT ] IN (expr, ...)

Fields

§span: Span
§expr: Box<Expr>
§list: Vec<Expr>
§not: bool
§

InSubquery

[ NOT ] IN (SELECT ...)

Fields

§span: Span
§expr: Box<Expr>
§subquery: Box<Query>
§not: bool
§

LikeSubquery

LIKE (SELECT ...) [ESCAPE '<escape>']

Fields

§span: Span
§expr: Box<Expr>
§subquery: Box<Query>
§modifier: SubqueryModifier
§escape: Option<String>
§

LikeAnyWithEscape

<left> LIKE ANY <right> ESCAPE '<escape>'

Fields

§span: Span
§left: Box<Expr>
§right: Box<Expr>
§escape: String
§

LikeWithEscape

<left> [NOT] LIKE <right> ESCAPE '<escape>'

Fields

§span: Span
§left: Box<Expr>
§right: Box<Expr>
§is_not: bool
§escape: String
§

Between

BETWEEN ... AND ...

Fields

§span: Span
§expr: Box<Expr>
§low: Box<Expr>
§high: Box<Expr>
§not: bool
§

BinaryOp

Binary operation

Fields

§span: Span
§op: BinaryOperator
§left: Box<Expr>
§right: Box<Expr>
§

JsonOp

JSON operation

Fields

§span: Span
§op: JsonOperator
§left: Box<Expr>
§right: Box<Expr>
§

UnaryOp

Unary operation

Fields

§span: Span
§op: UnaryOperator
§expr: Box<Expr>
§

Cast

CAST expression, like CAST(expr AS target_type)

Fields

§span: Span
§expr: Box<Expr>
§target_type: TypeName
§pg_style: bool
§

TryCast

TRY_CAST expression`

Fields

§span: Span
§expr: Box<Expr>
§target_type: TypeName
§

Extract

EXTRACT(IntervalKind FROM )

Fields

§span: Span
§kind: IntervalKind
§expr: Box<Expr>
§

DatePart

DATE_PART(IntervalKind, )

Fields

§span: Span
§kind: IntervalKind
§expr: Box<Expr>
§

Position

POSITION( IN )

Fields

§span: Span
§substr_expr: Box<Expr>
§str_expr: Box<Expr>
§

Substring

SUBSTRING( [FROM ] [FOR ])

Fields

§span: Span
§expr: Box<Expr>
§substring_from: Box<Expr>
§substring_for: Option<Box<Expr>>
§

Trim

TRIM([[BOTH | LEADING | TRAILING] FROM] ) Or TRIM()

Fields

§span: Span
§expr: Box<Expr>
§trim_where: Option<(TrimWhere, Box<Expr>)>
§

Literal

A literal value, such as string, number, date or NULL

Fields

§span: Span
§value: Literal
§

CountAll

COUNT(*) expression

Fields

§span: Span
§qualified: Vec<Indirection>
§window: Option<Window>
§

Tuple

(foo, bar)

Fields

§span: Span
§exprs: Vec<Expr>
§

FunctionCall

Scalar/Agg/Window function call

Fields

§span: Span
§func: FunctionCall
§

Case

CASE ... WHEN ... ELSE ... expression

Fields

§span: Span
§operand: Option<Box<Expr>>
§conditions: Vec<Expr>
§results: Vec<Expr>
§else_result: Option<Box<Expr>>
§

Exists

EXISTS expression

Fields

§span: Span
§not: bool

Indicate if this is a NOT EXISTS

§subquery: Box<Query>
§

Subquery

Scalar/ANY/ALL/SOME subquery

Fields

§span: Span
§modifier: Option<SubqueryModifier>
§subquery: Box<Query>
§

MapAccess

Access elements of Array, Map and Variant by index or key, like arr[0], or obj:k1

Fields

§span: Span
§expr: Box<Expr>
§accessor: MapAccessor
§

Array

The Array expr

Fields

§span: Span
§exprs: Vec<Expr>
§

Map

The Map expr

Fields

§span: Span
§kvs: Vec<(Literal, Expr)>
§

Interval

The Interval 1 DAY expr

Fields

§span: Span
§expr: Box<Expr>
§unit: IntervalKind
§

DateAdd

Fields

§span: Span
§unit: IntervalKind
§interval: Box<Expr>
§date: Box<Expr>
§

DateDiff

Fields

§span: Span
§unit: IntervalKind
§date_start: Box<Expr>
§date_end: Box<Expr>
§

DateBetween

Fields

§span: Span
§unit: IntervalKind
§date_start: Box<Expr>
§date_end: Box<Expr>
§

DateSub

Fields

§span: Span
§unit: IntervalKind
§interval: Box<Expr>
§date: Box<Expr>
§

DateTrunc

Fields

§span: Span
§unit: IntervalKind
§date: Box<Expr>
§

LastDay

Fields

§span: Span
§unit: IntervalKind
§date: Box<Expr>
§

PreviousDay

Fields

§span: Span
§unit: Weekday
§date: Box<Expr>
§

NextDay

Fields

§span: Span
§unit: Weekday
§date: Box<Expr>
§

Hole

Fields

§span: Span
§name: String
§

Placeholder

Fields

§span: Span

Implementations§

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impl Expr

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pub fn span(&self) -> Span

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pub fn whole_span(&self) -> Span

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pub fn all_function_like_syntaxes() -> &'static [&'static str]

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impl Expr

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pub fn affix(&self) -> Affix

Trait Implementations§

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impl Clone for Expr

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Expr

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

Formats the value using the given formatter. Read more
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impl Display for Expr

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

Formats the value using the given formatter. Read more
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impl Drive for Expr

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fn drive<V: Visitor>(&self, visitor: &mut V)

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impl DriveMut for Expr

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fn drive_mut<V: VisitorMut>(&mut self, visitor: &mut V)

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impl PartialEq for Expr

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

Auto Trait Implementations§

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impl Freeze for Expr

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impl RefUnwindSafe for Expr

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impl Send for Expr

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impl Sync for Expr

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impl Unpin for Expr

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impl UnwindSafe for Expr

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Paint for T
where T: ?Sized,

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fn fg(&self, value: Color) -> Painted<&T>

Returns a styled value derived from self with the foreground set to value.

This method should be used rarely. Instead, prefer to use color-specific builder methods like red() and green(), which have the same functionality but are pithier.

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Returns self with the fg() set to [Color :: Primary].

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Returns self with the fg() set to [Color :: Fixed].

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where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> ErasedDestructor for T
where T: 'static,