Struct SelectStatement

pub struct SelectStatement {
    pub expr: Box<SetExpression>,
    pub order_by: Vec<OrderBy>,
    pub slice: Option<Slice>,
}

Representation of a select statement, that is, the only type of queries allowed.

Fields

expr: Box<SetExpression>

the query expression

order_by: Vec<OrderBy>

if non-empty, an sort-order that is applied to the rows returned as result

slice: Option<Slice>

an optional slice clause, which can restrict the rows returned to a window within the set of rows as generated by expr and order_by.

Implementations

impl SelectStatement

pub fn get_table_references( &self, default_schema: Identifier, ) -> Vec<ResourceId>

This function returns the referenced tables in the provided intermediate_ast

Note that we provide a default_schema in case the table expression does not have any associated schema. This default_schema is used to construct the resource_id, as we cannot have this field empty. In case the table expression already has an associated schema, then it’s used instead of default_schema. Although the DQL endpoint would require both to be equal, we have chosen to not fail here as this would imply the caller to always know beforehand the referenced schemas.

Return:

• The vector with all tables referenced by the intermediate ast, encoded as resource ids.

Trait Implementations

impl Clone for SelectStatement

fn clone(&self) -> SelectStatement

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SelectStatement

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SelectStatement

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<SelectStatement> for Query

fn from(select: SelectStatement) -> Self

Converts to this type from the input type.

impl FromStr for SelectStatement

type Err = ParseError

The associated error which can be returned from parsing.

fn from_str(query: &str) -> ParseResult<Self>

Parses a string s to return a value of this type.

impl PartialEq for SelectStatement

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

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for SelectStatement

impl StructuralPartialEq for SelectStatement