Struct QueryPlan 

pub struct QueryPlan {
    pub table: String,
    pub filters: Vec<FilterNode>,
    pub projections: Option<Vec<String>>,
    pub order_by: Vec<(String, bool)>,
    pub group_by: Vec<String>,
    pub limit: Option<usize>,
    pub offset: Option<usize>,
}

A query plan that accumulates operations for SQL generation.

Fields

table: String

Table name to query

filters: Vec<FilterNode>

Pushdown-able filter predicates

projections: Option<Vec<String>>

Column projections (None = SELECT *)

order_by: Vec<(String, bool)>

ORDER BY clauses: (column, descending)

group_by: Vec<String>

GROUP BY columns

limit: Option<usize>

LIMIT

offset: Option<usize>

OFFSET

Implementations

impl QueryPlan

pub fn new(table: &str) -> Self

Create a new query plan for a table

pub fn to_sql(&self) -> String

Generate a SQL query string from this plan

Trait Implementations

impl Clone for QueryPlan

fn clone(&self) -> QueryPlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryPlan

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

Formats the value using the given formatter.

impl Default for QueryPlan

fn default() -> QueryPlan

Returns the “default value” for a type.