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package protobuf4j.orm.sql;
import javax.annotation.Nonnull;
/**
* 表达式
*
* author: yuanwq
* date: 2018/7/11
*/
public interface IExpression extends ISqlObject {
/**
* 比较该表达式与外部运算符{@code outerOp}的优先级
*
* 若表达式优先级较低，则需要在外部使用括号包裹
*
* @param outerOp 外部运算符
* @return 1: 表达式优先级高于外部运算符；0：相同；-1：表达式优先级低于外部运算符
*/
int comparePrecedence(@Nonnull ISqlOperator outerOp);
IExpression and(IExpression right);
IExpression or(IExpression right);
IExpression xor(IExpression right);
IExpression not();
}