import type { Expr } from "../ir/ir.js";
import type { FnRule } from "../infer/functions.js";
import { type Type } from "../infer/types.js";
export declare const BQ_ALIASES: Record<string, string>;
export declare function bigqueryParseType(text: string): Type;
export declare function bigqueryLiteral(text: string): Type;
export declare const BIGQUERY_FUNCTION_RETURNS: Record<string, FnRule>;
/** Pre-registry hook for BigQuery calls whose return type a plain FnRule can't express. Today: bare
 *  EXTRACT(part FROM …), typed from the datepart keyword lowerExtract parks at args[0]. Returns a
 *  Type to short-circuit the registry, or undefined to fall through to it. */
export declare function bigquerySpecial(fn: Extract<Expr, {
    kind: "function";
}>): Type | undefined;