import { SqlAdapter } from "../interfaces/SqlAdapter.js";
export declare abstract class BaseSqlAdapter implements SqlAdapter {
    abstract adaptSql(sql: string): string;
    abstract getDatabaseType(): 'postgresql' | 'mysql';
    abstract supportsReturning(): boolean;
    createInsertSql(tableName: string, columns: string[]): string;
    createUpdateSql(tableName: string, columns: string[]): string;
    createDeleteSql(tableName: string): string;
    getNowFunction(): string;
    getLimitClause(limit: number, offset?: number): string;
    protected abstract createPlaceholder(index: number): string;
    protected createPlaceholders(count: number): string;
}
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