duckdb::LambdaRefExpression Class Reference

Represents a reference to a lambda parameter. More...

Inheritance diagram for duckdb::LambdaRefExpression:

Collaboration diagram for duckdb::LambdaRefExpression:

Public Member Functions
	LambdaRefExpression (idx_t lambda_idx, string column_name_p)
bool	IsScalar () const override
	Returns true if expression does not contain a group ref or col ref or parameter.
string	GetName () const override
	Get the name of the expression.
string	ToString () const override
	Convert the Expression to a String.
hash_t	Hash () const override
unique_ptr< ParsedExpression >	Copy () const override
	Create a copy of this expression.
void	Serialize (Serializer &serializer) const override
Public Member Functions inherited from duckdb::ParsedExpression
	ParsedExpression (ExpressionType type, ExpressionClass expression_class)
	Create an Expression.
bool	IsAggregate () const override
	Returns true if this expression is an aggregate or not.
bool	IsWindow () const override
	Returns true if the expression has a window function or not.
bool	HasSubquery () const override
	Returns true if the query contains a subquery.
bool	IsScalar () const override
	Returns true if expression does not contain a group ref or col ref or parameter.
bool	HasParameter () const override
	Returns true if the expression has a parameter.
bool	Equals (const BaseExpression &other) const override
	Returns true if this expression is equal to another expression.
hash_t	Hash () const override
Public Member Functions inherited from duckdb::BaseExpression
	BaseExpression (ExpressionType type, ExpressionClass expression_class)
	Create an Expression.
ExpressionClass	GetExpressionClass () const
	Returns the class of the expression.
ExpressionType	GetExpressionType () const
	Returns the type of the expression.
void	SetExpressionTypeUnsafe (ExpressionType new_type)
optional_idx	GetQueryLocation () const
	Returns the location in the query (if any)
void	SetQueryLocation (optional_idx location)
	Sets the location in the query.
bool	HasAlias () const
	Returns true if the expression has a non-empty alias.
const string &	GetAlias () const
	Returns the alias of the expression.
void	SetAlias (const string &alias_p)
	Sets the alias of the expression.
void	SetAlias (string &&alias_p)
	Sets the alias of the expression.
void	ClearAlias ()
	Clears the alias of the expression.
void	Print () const
	Print the expression to stdout.
bool	operator== (const BaseExpression &rhs) const
virtual void	Verify () const
template<class TARGET >
TARGET &	Cast ()
template<class TARGET >
const TARGET &	Cast () const

Static Public Member Functions
static unique_ptr< ParsedExpression >	FindMatchingBinding (optional_ptr< vector< DummyBinding > > &lambda_bindings, const string &parameter_name)
	Traverses the lambda_bindings to find a matching binding for the column_name.
static unique_ptr< ParsedExpression >	Deserialize (Deserializer &deserializer)
Static Public Member Functions inherited from duckdb::ParsedExpression
static unique_ptr< ParsedExpression >	Deserialize (Deserializer &deserializer)
static bool	Equals (const unique_ptr< ParsedExpression > &left, const unique_ptr< ParsedExpression > &right)
static bool	ListEquals (const vector< unique_ptr< ParsedExpression > > &left, const vector< unique_ptr< ParsedExpression > > &right)
Static Public Member Functions inherited from duckdb::BaseExpression
static bool	Equals (const BaseExpression &left, const BaseExpression &right)

Public Attributes
idx_t	lambda_idx
	The index of the lambda parameter in the lambda_bindings vector.
string	column_name
	The name of the lambda parameter (in a specific Binding in lambda_bindings)
Public Attributes inherited from duckdb::BaseExpression
ExpressionType	type
	Type of the expression.
ExpressionClass	expression_class
	The expression class of the node.
string	alias
	The alias of the expression,.
optional_idx	query_location
	The location in the query (if any)

Static Public Attributes
static constexpr const ExpressionClass	TYPE = ExpressionClass::LAMBDA_REF

Additional Inherited Members
Protected Member Functions inherited from duckdb::ParsedExpression
void	CopyProperties (const ParsedExpression &other)

Detailed Description

Represents a reference to a lambda parameter.

Constructor & Destructor Documentation

LambdaRefExpression()

duckdb::LambdaRefExpression::LambdaRefExpression	(	idx_t	lambda_idx,
		string	column_name_p
	)

Constructs a LambdaRefExpression from a lambda_idx and a column_name. We do not specify a table name, because we use dummy tables to bind lambda parameters

Member Function Documentation

IsScalar()

bool duckdb::LambdaRefExpression::IsScalar ( ) const

overridevirtual

Returns true if expression does not contain a group ref or col ref or parameter.

Implements duckdb::BaseExpression.

GetName()

string duckdb::LambdaRefExpression::GetName ( ) const

overridevirtual

Get the name of the expression.

Reimplemented from duckdb::BaseExpression.

ToString()

string duckdb::LambdaRefExpression::ToString ( ) const

overridevirtual

Convert the Expression to a String.

Implements duckdb::BaseExpression.

Hash()

hash_t duckdb::LambdaRefExpression::Hash ( ) const

overridevirtual

Creates a hash value of this expression. It is important that if two expressions are identical (i.e. Expression::Equals() returns true), that their hash value is identical as well.

Implements duckdb::BaseExpression.

Copy()

unique_ptr< ParsedExpression > duckdb::LambdaRefExpression::Copy ( ) const

overridevirtual

Create a copy of this expression.

Implements duckdb::ParsedExpression.

Serialize()

void duckdb::LambdaRefExpression::Serialize ( Serializer &  serializer ) const

overridevirtual

Reimplemented from duckdb::ParsedExpression.

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The documentation for this class was generated from the following file:

• external/duckdb/duckdb.cpp