export declare type DataType = 'string' | 'date' | 'boolean' | 'number' | 'text' | 'json';
export interface Column {
    name: string;
    type: DataType;
    isNullable: boolean;
    isPrimaryKey: boolean;
    isUniqueKey: boolean;
}
export interface Relation {
    primaryTable: string;
    foreignTable: string;
    primaryColumn: Pick<Column, 'name' | 'type'>;
    foreignColumn: Pick<Column, 'name' | 'type'>;
}
export declare type Columns = Column[];
export declare type Relations = Relation[];
export interface TableInfos {
    columns: Columns;
    relations: Relations;
}
export declare type ColumnType = string | number | JSON | Date | boolean | null;
export declare type Row = Record<string, ColumnType>;
export declare type Rows = Row[];
export interface ConnectorSchema {
    name: string;
    type: 'db' | 'question';
    tables: {
        name: string;
        displayName: string;
        alias?: string;
        columns: Columns;
        relations: Relations;
    }[];
}
export declare type ConnectorSchemas = ConnectorSchema[];
export interface ConnectorQueryResult {
    query: string;
    columns: Columns;
    data: Rows;
}
export interface ConnectorCountQueryResult {
    query: string;
    count: number;
}
export interface ConnectorTablePreviewResult {
    tableInfos: TableInfos;
    rows: Rows;
}
export interface ConnectorTable {
    name: string;
    schema?: string;
}
export declare type LogLevel = 'log' | 'error' | 'warn' | 'debug' | 'verbose';
export interface AuthenticationConfigField {
    name: string;
    labelTranslationKey: string;
    defaultLabel: string;
    placeholderTranslationKey: string;
    defaultPlaceholder: string;
    defaultValue?: string | number | boolean;
    required: boolean;
    type: 'text' | 'number' | 'password' | 'boolean';
    validationRegex?: string;
}
export interface ConnectorInfo {
    name: string;
    type: string;
    description: string;
}
export interface LoggerService {
    log(message: any, ...optionalParams: any[]): any;
    error(message: any, ...optionalParams: any[]): any;
    warn(message: any, ...optionalParams: any[]): any;
    debug?(message: any, ...optionalParams: any[]): any;
    verbose?(message: any, ...optionalParams: any[]): any;
    setLogLevels?(levels: LogLevel[]): any;
}