/**
 * Query Builder
 *
 * Builds database queries from the uniform ORM interface.
 * Translates query options to database-specific SQL or query objects.
 */
import { DatabaseType } from '../types/enums';
import { IQueryOptions, IBuiltQuery } from '../types/query.interface';
/**
 * Query builder for translating ORM queries to database-specific formats
 */
export declare class QueryBuilder {
    private databaseType;
    constructor(databaseType: DatabaseType);
    /**
     * Build a query from query options
     * @param options Query options
     * @returns Built query ready for execution
     */
    buildQuery(options: IQueryOptions): IBuiltQuery;
    private buildPostgresQuery;
    private buildMySQLQuery;
    private buildMongoQuery;
    private buildDynamoQuery;
    private buildCassandraQuery;
    private buildWhereClause;
    private buildComparisonClause;
    private escapeIdentifier;
    /**
     * Format a PostgreSQL JSON path accessor
     * e.g., "metadata.role" becomes "metadata"->>'role'
     */
    private formatPostgresJsonPath;
    /**
     * Format a MySQL JSON path accessor
     * e.g., "metadata.role" becomes JSON_UNQUOTE(JSON_EXTRACT(`metadata`, '$.role'))
     */
    private formatMySQLJsonPath;
    private getPlaceholder;
}
/**
 * Export operators for external use
 * Uses lowercase naming convention to match Mongoose/MongoDB style
 */
export declare const Operators: {
    readonly $eq: "$eq";
    readonly $ne: "$ne";
    readonly $gt: "$gt";
    readonly $gte: "$gte";
    readonly $lt: "$lt";
    readonly $lte: "$lte";
    readonly $in: "$in";
    readonly $nin: "$nin";
    readonly $like: "$like";
    readonly $ilike: "$ilike";
    readonly $isNull: "$isNull";
    readonly $isNotNull: "$isNotNull";
    readonly $between: "$between";
    readonly $regex: "$regex";
    readonly $exists: "$exists";
    readonly $contains: "$contains";
    readonly $containedBy: "$containedBy";
    readonly $overlaps: "$overlaps";
    readonly $and: "$and";
    readonly $or: "$or";
    readonly $not: "$not";
    readonly $nor: "$nor";
};
export type OperatorType = keyof typeof Operators;