Enum Statement

pub enum Statement {
    TransactionStart(TransactionStart),
    TransactionEnd(TransactionEnd),
    SetVariable(SetVariable),
    Prepare(Prepare),
    Execute(Execute),
    Deallocate(Deallocate),
}

Various types of Statements.

Transactions:

While DataFusion does not offer support transactions, it provides LogicalPlan support to assist building database systems using DataFusion

Variants

TransactionStart(TransactionStart)

TransactionEnd(TransactionEnd)

SetVariable(SetVariable)

Set a Variable

Prepare(Prepare)

Prepare a statement and find any bind parameters (e.g. ?). This is used to implement SQL-prepared statements.

Execute(Execute)

Execute a prepared statement. This is used to implement SQL ‘EXECUTE’.

Deallocate(Deallocate)

Deallocate a prepared statement. This is used to implement SQL ‘DEALLOCATE’.

Implementations

impl Statement

pub fn schema(&self) -> &DFSchemaRef

Get a reference to the logical plan’s schema

pub fn name(&self) -> &str

Return a descriptive string describing the type of this Statement

pub fn display(&self) -> impl Display + '_

Return a formatable structure with the a human readable description of this LogicalPlan node per node, not including children.

See crate::LogicalPlan::display for an example

Trait Implementations

impl Clone for Statement

fn clone(&self) -> Statement

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Statement

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

Formats the value using the given formatter.

impl Hash for Statement

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 PartialEq for Statement

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

fn partial_cmp(&self, other: &Statement) -> 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 Statement

impl StructuralPartialEq for Statement