/**
 * Output column aliases for `QueryBuilderOptions.aliases`.
 *
 * `{ email_addr: 'email' }` reads alias → source column, and makes SELECT emit
 * `email AS email_addr`. This is an *output* rename only: filters, sorting and
 * grouping keep using the real column name, so the alias never has to be
 * whitelisted or resolved back to a column.
 */
/** Source column → the aliases declared for it (a column may have several). */
export type AliasMap = ReadonlyMap<string, readonly string[]>;
/**
 * Validate the alias option and invert it into a column → aliases lookup.
 *
 * Returns `null` when no aliases are declared, so the common path can skip the
 * alias branch entirely.
 *
 * @throws Error on an alias or target column that is not a bare identifier
 * @throws InvalidColumnError when strict and the target is not whitelisted
 */
export declare function buildAliasMap(aliases: Record<string, string>, whitelist: readonly string[], whitelistSet: ReadonlySet<string>, strict: boolean): AliasMap | null;
/**
 * Apply aliases to an explicit projection (from `select()` / `exclude()`).
 *
 * An aliased column is renamed in place — emitted once per alias as
 * `col AS alias` — and every other field passes through untouched. A column
 * that is not part of the projection contributes nothing.
 */
export declare function aliasProjection(fields: readonly string[], map: AliasMap): string[];
/**
 * Build the projection for a query with no explicit `select()` / `exclude()`.
 *
 * There is no field list to rename in place, so `*` is kept and the aliased
 * columns are appended: `SELECT *, email AS email_addr`. The source column
 * therefore stays in the result set alongside its renamed copy.
 */
export declare function aliasStarProjection(map: AliasMap): string[];
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