/**
 * In-memory sample rows for `conarium --demo`.
 * Not a database. Masking, row caps, and refusals run in the existing gate
 * after SQL has already passed governance — this connector only resolves
 * which sample table was asked for.
 */
import type { Connector, ConnectorCapabilities, ConnectorConfig, QueryResult, SchemaTable } from '../types.js';
export declare const DEMO_UNSUPPORTED_SQL = "demo connector answers SELECT on its sample tables only";
export declare const DEMO_SEARCH_UNAVAILABLE = "not available in demo mode";
/** Well-known test PAN. Content detectors and `*.card` both see this shape. */
export declare const DEMO_CARD = "4111 1111 1111 1111";
export declare const DEMO_CUSTOMERS: Record<string, unknown>[];
export declare const DEMO_ORDERS: Record<string, unknown>[];
/** Denied by policy before this connector is reached. No credential-shaped strings. */
export declare const DEMO_SECRETS: Record<string, unknown>[];
/**
 * After the gate has rewritten the statement, recover the sample table
 * name. Joins, computed SELECT, and anything that is not one of the
 * three sample tables are refused here — not executed.
 */
export declare function resolveDemoTable(sql: string): string;
/**
 * The one shape this connector answers: `SELECT <columns | *> FROM <sample
 * table> [LIMIT n]`. The column list is honoured, so a statement gets back
 * the columns it named and no others; a column the sample table does not
 * have is an error, as it would be on a database. WHERE, JOIN, expressions
 * and aliases are refused rather than ignored: ignoring them would return
 * rows the statement did not ask for.
 */
export declare function parseDemoSelect(sql: string): {
    table: string;
    columns: string[];
};
export declare class DemoConnector implements Connector {
    name: string;
    description: string;
    capabilities: ConnectorCapabilities;
    queryCalls: number;
    listCalls: number;
    describeCalls: number;
    searchCalls: number;
    constructor(config: ConnectorConfig);
    connect(): Promise<void>;
    disconnect(): Promise<void>;
    listTables(): Promise<SchemaTable[]>;
    describeTable(table: string): Promise<SchemaTable>;
    query(sql: string): Promise<QueryResult>;
    search(): Promise<QueryResult>;
}
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