import type { QueryUpdateResult, RawRow } from '../type/index.js';
export declare function flatObject<E extends object>(obj: E, pre?: string): E;
export declare function unflatObjects<T extends object>(objects: RawRow[]): T[];
export declare function obtainAttrsPaths<T extends object>(row: T): {
    [k: string]: string[];
};
/**
 * Escape a SQL identifier (table name, column name, etc.)
 * @param val the identifier to escape
 * @param escapeIdChar the escape character to use (e.g. ` or ")
 * @param forbidQualified whether to forbid qualified identifiers (containing dots)
 * @param addDot whether to add a dot suffix
 */
export declare function escapeSqlId(val: string, escapeIdChar?: '`' | '"', forbidQualified?: boolean, addDot?: boolean): string;
/**
 * Extract INSERT result IDs from raw database rows.
 *
 * UQL's SQL dialect always aliases the entity's ID column to `id` in RETURNING clauses,
 * so the result rows always contain an `id` property regardless of the entity's @Id() key name.
 */
export declare function extractInsertResult(rows: RawRow[], changes?: number): QueryUpdateResult;
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