import type { ModelDefinition, RelationConfig } from './types';
/**
 * Relation key as it can arrive from PostgreSQL. node-pg returns integer
 * columns as JS numbers and uuid/text columns as strings, so both must be
 * accepted and compared consistently.
 */
export type RelationKey = string | number;
/**
 * A batch query plus the metadata needed to fan its rows back out to parents.
 *
 * `batchKey` is the column the rows must be grouped on; `isSingle` says whether
 * a parent takes one row (belongsTo/hasOne) or an array (hasMany).
 */
export interface BatchLoadConfig {
    query: {
        text: string;
        values: unknown[];
    };
    batchKey: string;
    isSingle: boolean;
}
/**
 * Build the batch query for a relation, dispatching on its type.
 * Accepts a pre-resolved relation to avoid redundant lookups.
 */
export declare function getBatchLoadConfig(model: ModelDefinition, relation: RelationConfig, keys: readonly RelationKey[]): BatchLoadConfig;
/**
 * Generate batch load config for belongsTo relation (public API)
 */
export declare function batchLoadBelongsTo(model: ModelDefinition, relationName: string, keys: readonly RelationKey[]): BatchLoadConfig;
/**
 * Generate batch load config for hasOne relation (public API)
 */
export declare function batchLoadHasOne(model: ModelDefinition, relationName: string, keys: readonly RelationKey[]): BatchLoadConfig;
/**
 * Generate batch load config for hasMany relation (public API)
 */
export declare function batchLoadHasMany(model: ModelDefinition, relationName: string, keys: readonly RelationKey[]): BatchLoadConfig;
/**
 * Generate batch load config for hasManyThrough relation (public API)
 */
export declare function batchLoadHasManyThrough(model: ModelDefinition, relationName: string, keys: readonly RelationKey[]): BatchLoadConfig;
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