import type { AbstractSqlDialect } from '../dialect/index.js';
import type { ExtraOptions } from '../type/index.js';
import { AbstractSqlQuerier } from './abstractSqlQuerier.js';
export declare abstract class AbstractPoolQuerier<C> extends AbstractSqlQuerier {
    protected readonly connect: () => Promise<C>;
    readonly extra?: ExtraOptions | undefined;
    protected conn?: C;
    constructor(dialect: AbstractSqlDialect, connect: () => Promise<C>, extra?: ExtraOptions | undefined);
    protected lazyConnect(): Promise<void>;
    internalRelease(): Promise<void>;
    protected abstract releaseConn(conn: C): Promise<void>;
}
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