/**
 * Shared operator constants and utilities used by both SQLite and PostgreSQL adapters.
 *
 * These are the `$`-prefixed internal operator names that database adapters recognise.
 * User-facing operator names (e.g., `not_equals`) are converted to these by
 * `flattenWhereClause` in `@momentumcms/server-core`.
 */
/** Simple operators that map directly to `"column" OP placeholder` */
export declare const SIMPLE_OP_MAP: Record<string, string>;
/** All recognised $-prefixed operator keys (simple + special-cased) */
export declare const ALL_OPS: Set<string>;
/** Maximum number of elements allowed in $in / $nin arrays. */
export declare const MAX_IN_ARRAY_SIZE = 500;
/** Maximum string length for $like / $contains pattern values. */
export declare const MAX_PATTERN_LENGTH = 1000;
/** Checks whether an object value contains any recognised operator keys. */
export declare function hasOperatorKeys(value: object): boolean;