export declare const requiredPqsRelations: readonly ["__contracts", "__contract_tpe", "__events", "__exercises", "__exercise_tpe", "__packages", "__transactions", "__watermark"];
export type PqsRelation = (typeof requiredPqsRelations)[number];
export interface PqsRelationEdge {
    readonly target: PqsRelation;
    readonly sourceColumn: string;
    readonly targetColumn: string;
    readonly cardinality: "one" | "many";
    readonly nullable: boolean;
}
export declare const pqsRelationEdges: Readonly<Partial<Record<PqsRelation, Readonly<Record<string, PqsRelationEdge>>>>>;
export interface PqsRelationMetadata {
    readonly fields: Readonly<Record<string, string>>;
    readonly uniqueKeys: readonly (readonly string[])[];
    readonly numericFields: readonly string[];
    readonly arrayFields: readonly string[];
    readonly dateFields: readonly string[];
    readonly binaryFields: readonly string[];
    readonly stringFields?: readonly string[];
}
export declare const pqsRelationMetadata: Readonly<Record<PqsRelation, PqsRelationMetadata>>;
export declare const requiredPqsColumns: Readonly<Record<PqsRelation, readonly string[]>>;
export declare class PqsSchemaProfileV1 {
    readonly schema: string;
    constructor(schema?: string);
    relation(relation: PqsRelation): string;
    static jsonField(relation: PqsRelation, field: string): boolean;
    static bucketField(relation: PqsRelation, field: string): boolean;
}
export interface PqsSchemaClient {
    query(query: string, values: readonly unknown[]): Promise<{
        readonly rows: readonly Record<string, unknown>[];
    }>;
}
export declare function validatePqsSchemaAsync(client: PqsSchemaClient, profile: PqsSchemaProfileV1): Promise<void>;
export declare function assertPqsSchemaIdentifier(schema: string): void;