query.h

来自「linux 下用c++ 开发的一个小型数据库系统」· C头文件 代码 · 共 45 行

#ifndef QUERY_H
#define QUERY_H

#include "heapfile.h"

enum JoinType {NLJoin, SMJoin, HashJoin};

//
// Prototypes for query layer functions
//


const Status QU_Select(const string & result, 
		       const int projCnt, 
		       const attrInfo projNames[],
		       const attrInfo *attr, 
		       const Operator op, 
		       const char *attrValue);

const Status QU_Join(const string & result, 
		     const int projCnt, 
		     const attrInfo projNames[],
		     const attrInfo *attr1, 
		     const Operator op, 
		     const attrInfo *attr2);

const Status QU_Insert(const string & relation, 
		       const int attrCnt, 
		       const attrInfo attrList[]);

const Status QU_Delete(const string & relation, 
		       const string & attrName, 
		       const Operator op,
		       const Datatype type, 
		       const char *attrValue);

const Status QU_Update(const string & relation,
                       const int attrCnt,
                       const attrInfo attrList[],
                       const string & attrName,
                       const Operator op,
                       const Datatype type,
                       const char *attrValue);
#endif