import { type SQL, type AnyColumn } from "drizzle-orm";
/**
 * TiDB / MySQL window function fragments.
 * These helpers generate only the function call; use Drizzle `sql` to append `OVER (...)`.
 *
 * Example: `sql`${rowNumber()} OVER (PARTITION BY ${t.groupId} ORDER BY ${t.id})``
 */
export type WindowSqlInput = SQL | AnyColumn | string | number | boolean;
/** `CUME_DIST()` */
export declare function cumeDist(): SQL;
/** `DENSE_RANK()` */
export declare function denseRank(): SQL;
/** `FIRST_VALUE(expr)` */
export declare function firstValue(expr: WindowSqlInput): SQL;
/** `LAG(expr [, offset [, default]])` */
export declare function lag(expr: WindowSqlInput, offset?: WindowSqlInput, defaultValue?: WindowSqlInput): SQL;
/** `LAST_VALUE(expr)` */
export declare function lastValue(expr: WindowSqlInput): SQL;
/** `LEAD(expr [, offset [, default]])` */
export declare function lead(expr: WindowSqlInput, offset?: WindowSqlInput, defaultValue?: WindowSqlInput): SQL;
/** `NTH_VALUE(expr, n)` */
export declare function nthValue(expr: WindowSqlInput, n: WindowSqlInput): SQL;
/** `NTILE(n)` */
export declare function ntile(n: WindowSqlInput): SQL;
/** `PERCENT_RANK()` */
export declare function percentRank(): SQL;
/** `RANK()` */
export declare function rank(): SQL;
/** `ROW_NUMBER()` */
export declare function rowNumber(): SQL;
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