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#pragma once
#include "enginedata.h"
#include <vector>
#include <string>
#include <map>
using namespace std;
struct WhereClause{
int col;
vector<RowItem> values;
WhereClause(void);
WhereClause(const int _c,const vector<RowItem> &_v);
};
struct UpdateClause{
int col;
RowItem value;
UpdateClause(void);
UpdateClause(const int _c,const RowItem &_v);
};
struct QueryResult{
int res;
vector<Row> rows;
string msg; //empty message indicates success
QueryResult(void);
QueryResult(int);
QueryResult(int,const vector<Row>&);
QueryResult(int,const vector<Row>&,const string&);
QueryResult(int,const string&);
};
struct Query{
string tablename;
virtual QueryResult execute(map<string,Table>&);
virtual ~Query(void);
};
struct CreateQuery : public Query{
int nc;
ColHeader *header;
CreateQuery(void);
void setHeader(const ColHeader *hd);
QueryResult execute(map<string,Table> &tables);
};
struct FindQuery : public Query{
unsigned int limit; //-1=unlimited
vector<WhereClause> where;
FindQuery(void);
pair<vector<map<string,Row>::const_iterator>,string> executeIterators(map<string,Table> &tables);
pair<vector<map<string,Row>::const_iterator>,string> executeIterators(const Table &table);
QueryResult execute(map<string,Table> &tables);
};
struct InsertQuery : public Query{
Row row;
InsertQuery(const Row &_r);
InsertQuery(Row &&_r);
QueryResult execute(map<string,Table> &tables);
};
struct UpdateQuery : public Query{
vector<WhereClause> where;
vector<UpdateClause> updates;
UpdateQuery(void);
QueryResult execute(map<string,Table> &tables);
};
struct DeleteQuery : public Query{
vector<WhereClause> where;
DeleteQuery(void);
QueryResult execute(map<string,Table> &tables);
};
struct DropQuery : public Query{
DropQuery(void);
QueryResult execute(map<string,Table> &tables);
};
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