type VariableComponents = [scope: string | number | undefined, ...string[]];
type QueryValue = number | string | boolean | Date | null | number[] | boolean[] | string[] | Date[];
export declare function isValueVariable(value: QueryValue): value is string;
export declare function getVariableComponents(variable: string): VariableComponents;
export declare function varScopeType(scope: string): string;
export declare function isVariableScopeRelational(scope: string | number | undefined): scope is number;
/**
 * Given a variable, if the variable is referential, increment the scope by 1, otherwise return the variable unchanged.
 */
export declare function safeIncrementSubqueryVar(varName: string): string;
export {};