export interface DatabaseSchema {
    tables: TableInfo[];
}
export interface TableInfo {
    name: string;
    schema: string;
    comment?: string;
    columns: ColumnInfo[];
    primaryKey: string[];
    foreignKeys: ForeignKey[];
    uniqueKeys: UniqueKey[];
}
export interface ColumnInfo {
    name: string;
    sqlType: string;
    jsType: JsType;
    nullable: boolean;
    hasDefault: boolean;
    /**
     * The raw SQL default expression (e.g. "nextval('users_id_seq'::regclass)",
     * "now()", "'pending'::text"). Optional: only populated when the
     * introspector can read it. Useful for distinguishing user-supplied
     * defaults from server-managed ones (timestamps, sequences).
     */
    defaultExpression?: string;
    autoIncrement: boolean;
    comment?: string;
}
export interface ForeignKey {
    name: string;
    columns: string[];
    referencedTable: string;
    referencedSchema: string;
    referencedColumns: string[];
}
export interface UniqueKey {
    name: string;
    columns: string[];
}
export type JsType = 'string' | 'number' | 'bigint' | 'boolean' | 'Date' | 'Buffer' | 'object' | 'unknown';