import type { SQL, Column, DB } from './types.js';
import type { IntervalUnit } from './expressions.js';
import type { SQLWrapper } from '../query/sql/sql.js';
/** `now() - interval '5 minutes'`. Composes `now`, `subtract`, and `interval`. */
export declare function ago(amount: number, unit: IntervalUnit): SQL<Date>;
/** Shorthand for `cast(expr, 'uuid')`. */
export declare function castUuid(expression: SQL | Column | SQLWrapper): SQL<string>;
/** Shorthand for `cast(expr, 'jsonb')`. */
export declare function castJsonb(expression: SQL | Column | SQLWrapper): SQL;
/** Shorthand for `cast(expr, 'timestamptz')`. */
export declare function castTimestamp(expression: SQL | Column | SQLWrapper): SQL<Date>;
/** Shorthand for `cast(expr, 'boolean')`. */
export declare function castBoolean(expression: SQL | Column | SQLWrapper): SQL<boolean>;
/** Shorthand for `cast(expr, 'numeric')`. */
export declare function castNumeric(expression: SQL | Column | SQLWrapper): SQL<number>;
/** Shorthand for `cast(expr, 'integer')`. */
export declare function castInteger(expression: SQL | Column | SQLWrapper): SQL<number>;
/** Shorthand for `cast(expr, 'text')`. */
export declare function castText(expression: SQL | Column | SQLWrapper): SQL<string>;
/** `COALESCE((SELECT MAX(column) FROM table WHERE condition), 0) + 1`. Composes scalar, coalesce, max, increment. */
export declare function nextSequence(db: DB, column: Column, where?: SQL): SQL<number>;
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