/**
 * Copyright (c) 2020-present, Goldman Sachs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { TDSExecutionResult } from '@finos/legend-graph';
import type { CachedDataCubeSource } from '@finos/legend-data-cube';
export declare class LegendDataCubeDuckDBEngine {
    private static readonly DUCKDB_DEFAULT_SCHEMA_NAME;
    private static readonly CACHE_TABLE_NAME_PREFIX;
    private static readonly INGEST_TABLE_NAME_PREFIX;
    private static readonly CACHE_FILE_NAME;
    private static readonly INGEST_FILE_DATA_FILE_NAME;
    private static cacheTableCounter;
    private static ingestFileTableCounter;
    private static readonly COLUMN_NAME;
    private static readonly COLUMN_TYPE;
    private static readonly ESCAPE_CHAR;
    private static readonly QUOTE_CHAR;
    private _catalog;
    private _database?;
    private get database();
    retrieveCatalogTable(ref: string): DuckDBCatalogTable;
    initialize(): Promise<void>;
    cache(result: TDSExecutionResult): Promise<{
        schema: string;
        table: string;
        rowCount: number;
    }>;
    ingestLocalFileData(data: string, format: string, refId?: string): Promise<{
        dbReference: string;
        columnNames: string[];
    }>;
    ingestIcebergTable(warehouse: string, paths: string[], catalogApi: string, token?: string): Promise<{
        dbReference: string;
    }>;
    runSQLQuery(sql: string): Promise<TDSExecutionResult>;
    disposeCache(source: CachedDataCubeSource): Promise<void>;
    dispose(): Promise<void>;
}
export type DuckDBCatalogTable = {
    schemaName: string;
    tableName: string;
    columns: string[][];
};
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