Struct MainQuery 

pub struct MainQuery {
    pub tx_vars: Option<SqlBuilder>,
    pub pre_req: Option<SqlBuilder>,
    pub mutation: Option<SqlBuilder>,
    pub main: Option<SqlBuilder>,
}

A bundle of SQL queries to execute for a single API request.

Created by main_query. The executor runs these queries in order:

1. tx_vars — sets session variables (search_path, role, request context)
2. pre_req — calls the pre-request function (if configured)
3. main — the actual data query (read / mutate / call)

Each field is Option<SqlBuilder> because not every request needs all three queries (e.g., info requests have no main query).

Fields

tx_vars: Option<SqlBuilder>

Session variable setup query (SELECT set_config(…)).

pre_req: Option<SqlBuilder>

Pre-request function call (SELECT schema.pre_request()).

mutation: Option<SqlBuilder>

Mutation statement (INSERT/UPDATE/DELETE with RETURNING).

Only set for backends that don’t support DML in CTEs (e.g. SQLite). When set, main contains only the aggregation SELECT over a temp table populated by this mutation.

main: Option<SqlBuilder>

Main data query (CTE-wrapped SELECT / INSERT / UPDATE / DELETE / CALL).

Implementations

impl MainQuery

pub fn empty() -> Self

Create an empty query bundle.

Trait Implementations

impl Debug for MainQuery

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

Formats the value using the given formatter.