import { PodColumnBase } from './schema';
type AnyColumn = PodColumnBase<any, any, any, any>;
type ExpressionValue = unknown;
/**
 * SPARQL 表达式基类
 * 不再实现 drizzle-orm 的 SQLWrapper 接口，避免假 SQL 对象导致的问题
 */
export declare abstract class SPARQLExpression {
    readonly [Symbol.toStringTag] = "SPARQLExpression";
}
export declare class BinaryExpression extends SPARQLExpression {
    left: AnyColumn | SPARQLExpression | string;
    operator: string;
    right: ExpressionValue;
    readonly type = "binary_expr";
    constructor(left: AnyColumn | SPARQLExpression | string, operator: string, right: ExpressionValue);
}
export declare class LogicalExpression extends SPARQLExpression {
    operator: 'AND' | 'OR';
    expressions: (SPARQLExpression | ExpressionValue)[];
    readonly type = "logical_expr";
    constructor(operator: 'AND' | 'OR', expressions: (SPARQLExpression | ExpressionValue)[]);
}
export declare class UnaryExpression extends SPARQLExpression {
    operator: string;
    value: ExpressionValue;
    readonly type = "unary_expr";
    constructor(operator: string, value: ExpressionValue);
}
export declare class SelectionAliasExpression extends SPARQLExpression {
    alias: string;
    constructor(alias: string);
}
export declare class FunctionExpression extends SPARQLExpression {
    functionName: string;
    args: ExpressionValue[];
    constructor(functionName: string, args: ExpressionValue[]);
}
export {};
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