import { SQlComparisons, ServerQueryOperators } from "../types";
declare const JOIN_TYPES: readonly ["INNER JOIN", "JOIN", "LEFT JOIN", "RIGHT JOIN"];
/**
 * # Validate a bare SQL identifier (table, column, alias)
 * @description Identifiers can't be bound as parameters, so anything that
 * gets interpolated into SQL must pass this check first.
 */
export declare function sqlIdent(name: unknown, label?: string): string;
/**
 * # Validate a column reference
 * @description Accepts `field`, `table.field` or `table.*`
 */
export declare function sqlField(name: unknown, label?: string): string;
/**
 * # Quote an identifier for DDL statements
 */
export declare function sqlQuoteIdent(name: string): string;
/**
 * # Quote a string literal
 */
export declare function sqlStringLiteral(value: string): string;
/**
 * # Validate a non-negative integer (LIMIT, OFFSET, page)
 */
export declare function sqlInt(value: unknown, label?: string): number;
export declare function sqlOrderStrategy(strategy: unknown): "ASC" | "DESC";
export declare function sqlOperator(operator: unknown, fallback?: (typeof ServerQueryOperators)[number]): (typeof ServerQueryOperators)[number];
export declare function sqlRawEquality(equality: unknown): (typeof SQlComparisons)[number];
export declare function sqlJoinType(joinType: unknown): (typeof JOIN_TYPES)[number];
export {};