Enum TableExpr

pub enum TableExpr {
    RelationVar(Box<Expr>),
    LocalTable,
    None,
    Param(String),
}

Variants

RelationVar(Box<Expr>)

In SQL, this is a CTE

LocalTable

Actual table in a database. In SQL it can be referred to by name.

None

No expression (this decl just tracks a relation literal).

Param(String)

A placeholder for a relation that will be provided later.

Implementations

impl TableExpr

pub fn is_relation_var(&self) -> bool

Returns true if this is a TableExpr::RelationVar, otherwise false

pub fn as_relation_var_mut(&mut self) -> Option<&mut Box<Expr>>

Optionally returns mutable references to the inner fields if this is a TableExpr::RelationVar, otherwise None

pub fn as_relation_var(&self) -> Option<&Box<Expr>>

Optionally returns references to the inner fields if this is a TableExpr::RelationVar, otherwise None

pub fn into_relation_var(self) -> Result<Box<Expr>, TableExpr>

Returns the inner fields if this is a TableExpr::RelationVar, otherwise returns back the enum in the Err case of the result

pub fn is_local_table(&self) -> bool

Returns true if this is a TableExpr::LocalTable, otherwise false

pub fn is_none(&self) -> bool

Returns true if this is a TableExpr::None, otherwise false

pub fn is_param(&self) -> bool

Returns true if this is a TableExpr::Param, otherwise false

pub fn as_param_mut(&mut self) -> Option<&mut String>

Optionally returns mutable references to the inner fields if this is a TableExpr::Param, otherwise None

pub fn as_param(&self) -> Option<&String>

Optionally returns references to the inner fields if this is a TableExpr::Param, otherwise None

pub fn into_param(self) -> Result<String, TableExpr>

Returns the inner fields if this is a TableExpr::Param, otherwise returns back the enum in the Err case of the result

Trait Implementations

impl Clone for TableExpr

fn clone(&self) -> TableExpr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TableExpr

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TableExpr

fn deserialize<__D>( __deserializer: __D, ) -> Result<TableExpr, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for TableExpr

fn eq(&self, other: &TableExpr) -> 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 Serialize for TableExpr

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TableExpr