import type { Expr, PipeStage, QueryExpr, SelectExpr } from "./ir.js";
/** Every QueryExpr reachable in the IR (the AST, its nested query blocks, and, for a routine/
 *  compound container, each inner statement of `statements`, recursively). */
export declare function allQueryExprs(root: QueryExpr): QueryExpr[];
/** A QueryExpr's own DECLARE initializer expressions (T-SQL `DECLARE @x int = 1, @y int = @x + 1`).
 *  `declarations` lives on QueryExpr itself, not on any QueryBody/Scope.body — the same "not reachable
 *  from the body walk" shape as `orderBy`/`limit`, so callers attribute these to the owning scope the
 *  same way (see node-at.ts / scope/walk.ts). Populated only on the top-level statement's QueryExpr;
 *  absent everywhere else. NOT part of childExprs — these are not sub-expressions of any Expr. */
export declare function declarationExprs(query: QueryExpr): Expr[];
/** Sub-expressions reachable WITHOUT crossing a scope boundary (no subquery/exists descent). */
export declare function childExprs(expr: Expr): Expr[];
export declare function selectExprs(body: SelectExpr): Expr[];
export declare function stageExprs(stage: PipeStage): Expr[];
/** Depth-first walk over an Expr and every sub-expression reachable via childExprs, root first. */
export declare function walkExprs(root: Expr): Generator<Expr>;