/**
 * 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 { type ConnectionVisitor, Connection } from '../../../connection/Connection.js';
import type { DatasourceSpecification } from './DatasourceSpecification.js';
import type { AuthenticationStrategy } from './AuthenticationStrategy.js';
import type { Database } from '../model/Database.js';
import type { PackageableElementReference } from '../../../PackageableElementReference.js';
import type { PostProcessor } from './postprocessor/PostProcessor.js';
import type { RelationalQueryGenerationConfig } from './RelationalQueryGenerationConfig.js';
/**
 * TODO: to be modularized or handled differently
 *
 * @modularize
 * See https://github.com/finos/legend-studio/issues/946
 * See https://github.com/finos/legend-studio/issues/65
 */
export declare enum DatabaseType {
    DB2 = "DB2",
    H2 = "H2",
    MemSQL = "MemSQL",
    Sybase = "Sybase",
    SybaseIQ = "SybaseIQ",
    Composite = "Composite",
    Postgres = "Postgres",
    SqlServer = "SqlServer",
    Hive = "Hive",
    Snowflake = "Snowflake",
    Databricks = "Databricks",
    Presto = "Presto",
    Redshift = "Redshift",
    BigQuery = "BigQuery",
    Spanner = "Spanner",
    Trino = "Trino",
    DuckDB = "DuckDB"
}
export declare abstract class DatabaseConnection extends Connection {
    store: PackageableElementReference<Database> | undefined;
    /**
     * For convenience, we use a Typescript enum instead of the native
     * Pure enumeration meta::relational::runtime::DatabaseType
     *
     * @discrepancy model
     */
    type: string;
    timeZone?: string | undefined;
    quoteIdentifiers?: boolean | undefined;
    queryTimeOutInSeconds?: number | undefined;
    postProcessorWithParameter: unknown[];
    queryGenerationConfigs: RelationalQueryGenerationConfig[];
    constructor(store: PackageableElementReference<Database> | undefined, type: string);
}
export declare class RelationalDatabaseConnection extends DatabaseConnection {
    datasourceSpecification: DatasourceSpecification;
    authenticationStrategy: AuthenticationStrategy;
    postProcessors: PostProcessor[];
    /**
     * HACKY: this is done to quickly add support for local connection
     * See https://github.com/finos/legend-engine/pull/1807
     */
    localMode?: boolean | undefined;
    constructor(store: PackageableElementReference<Database> | undefined, type: string, datasourceSpecification: DatasourceSpecification, authenticationStrategy: AuthenticationStrategy);
    get hashCode(): string;
    accept_ConnectionVisitor<T>(visitor: ConnectionVisitor<T>): T;
}
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