Struct CaseStatement 

pub struct CaseStatement {
    pub case_token: AttachedToken,
    pub match_expr: Option<Expr>,
    pub when_blocks: Vec<ConditionalStatementBlock>,
    pub else_block: Option<ConditionalStatementBlock>,
    pub end_case_token: AttachedToken,
}

A CASE statement.

Examples:

CASE
    WHEN EXISTS(SELECT 1)
        THEN SELECT 1 FROM T;
    WHEN EXISTS(SELECT 2)
        THEN SELECT 1 FROM U;
    ELSE
        SELECT 1 FROM V;
END CASE;

BigQuery Snowflake

Fields

case_token: AttachedToken

The CASE token that starts the statement.

match_expr: Option<Expr>

Optional expression to match against in CASE ... WHEN.

when_blocks: Vec<ConditionalStatementBlock>

The WHEN ... THEN blocks of the CASE statement.

else_block: Option<ConditionalStatementBlock>

Optional ELSE block for the CASE statement.

end_case_token: AttachedToken

The last token of the statement (END or CASE).

Trait Implementations

impl Clone for CaseStatement

fn clone(&self) -> CaseStatement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CaseStatement

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

Formats the value using the given formatter.

impl Display for CaseStatement

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

Formats the value using the given formatter.

impl Eq for CaseStatement

impl From<CaseStatement> for Statement

fn from(c: CaseStatement) -> Statement

Converts to this type from the input type.

impl Hash for CaseStatement

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

where __H: Hasher,

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 CaseStatement

fn cmp(&self, other: &CaseStatement) -> 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 CaseStatement

fn eq(&self, other: &CaseStatement) -> 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 CaseStatement

fn partial_cmp(&self, other: &CaseStatement) -> 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 Spanned for CaseStatement

fn span(&self) -> Span

Return the Span (the minimum and maximum Location) for this AST node, by recursively combining the spans of its children.

impl StructuralPartialEq for CaseStatement

impl Visit for CaseStatement

fn visit<V>(&self, visitor: &mut V) -> ControlFlow<<V as Visitor>::Break>

where V: Visitor,

Visit this node with the provided Visitor.

impl VisitMut for CaseStatement

fn visit<V>(&mut self, visitor: &mut V) -> ControlFlow<<V as VisitorMut>::Break>

where V: VisitorMut,

Mutably visit this node with the provided VisitorMut.