import { PreparedCondition, ResolverContext, SqlDialect } from '../types';
export declare function filterZeroLengthCondFn(cond: PreparedCondition): boolean;
export declare function pruneCondition(name: string[], cond: PreparedCondition): PreparedCondition;
export declare function flatConditions(dest: PreparedCondition[], parentOp: 'and' | 'or' | 'not', cond: PreparedCondition): void;
export declare function pruneNonIndexFieldConditions(ctx: Pick<ResolverContext, 'params'>, cond: PreparedCondition, indexFieldNamesI: string[]): PreparedCondition;
export declare function getSqlConditionStringImpl(ctx: Pick<ResolverContext, 'params'>, cond: PreparedCondition, dialect: SqlDialect): string;