60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
|
#ifndef __SELECT_STATEMENT_H__
|
||
|
|
#define __SELECT_STATEMENT_H__
|
||
|
|
|
||
|
|
#include "Statement.h"
|
||
|
|
#include "Expr.h"
|
||
|
|
#include "List.h"
|
||
|
|
#include "Table.h"
|
||
|
|
|
||
|
|
namespace hsql {
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @struct OrderDescription
|
||
|
|
* Description of the order by clause within a select statement
|
||
|
|
* TODO: hold multiple expressions to be sorted by
|
||
|
|
*/
|
||
|
|
typedef enum {
|
||
|
|
kOrderAsc,
|
||
|
|
kOrderDesc
|
||
|
|
} OrderType;
|
||
|
|
|
||
|
|
struct OrderDescription {
|
||
|
|
OrderDescription(OrderType type, Expr* expr) : type(type), expr(expr) {}
|
||
|
|
OrderType type;
|
||
|
|
Expr* expr;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @struct LimitDescription
|
||
|
|
* Description of the limit clause within a select statement
|
||
|
|
*/
|
||
|
|
const int64_t kNoLimit = -1;
|
||
|
|
const int64_t kNoOffset = -1;
|
||
|
|
struct LimitDescription {
|
||
|
|
LimitDescription(int64_t limit, int64_t offset) : limit(limit), offset(offset) {}
|
||
|
|
int64_t limit;
|
||
|
|
int64_t offset;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @struct SelectStatement
|
||
|
|
* Representation of a full select statement.
|
||
|
|
*/
|
||
|
|
struct SelectStatement : Statement {
|
||
|
|
SelectStatement() : Statement(kStmtSelect) {};
|
||
|
|
|
||
|
|
TableRef* from_table;
|
||
|
|
List<Expr*>* select_list;
|
||
|
|
Expr* where_clause;
|
||
|
|
|
||
|
|
List<Expr*>* group_by;
|
||
|
|
|
||
|
|
OrderDescription* order;
|
||
|
|
LimitDescription* limit;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
} // namespace hsql
|
||
|
|
|
||
|
|
#endif
|