103 lines
1.5 KiB
C++
103 lines
1.5 KiB
C++
/*
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* Statement.h
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* Definition of the structure used to build the syntax tree.
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*/
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#ifndef __STATEMENT_H__
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#define __STATEMENT_H__
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#include "Expr.h"
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#include "List.h"
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#include "Table.h"
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namespace hsql {
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typedef enum {
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kStmtError,
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kStmtSelect,
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kStmtJoin,
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kStmtDelete,
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kStmtInsert,
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kStmtCreate
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} StatementType;
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typedef enum {
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kOrderNone,
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kOrderAsc,
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kOrderDesc
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} OrderType;
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struct OrderDescription {
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OrderDescription(OrderType type, Expr* expr) : type(type), expr(expr) {}
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OrderType type;
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Expr* expr;
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};
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const int64_t kNoLimit = -1;
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const int64_t kNoOffset = -1;
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struct LimitDescription {
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LimitDescription(int64_t limit, int64_t offset) : limit(limit), offset(offset) {}
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int64_t limit;
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int64_t offset;
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};
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typedef enum {
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kJoinInner,
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kJoinOuter,
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kJoinLeft,
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kJoinRight
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} JoinType;
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struct Statement {
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Statement(StatementType type) : type(type) {};
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StatementType type;
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const char* parser_msg;
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};
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struct SelectStatement : Statement {
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SelectStatement() : Statement(kStmtSelect) {};
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TableRef* from_table;
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List<Expr*>* select_list;
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Expr* where_clause;
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List<Expr*>* group_by;
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OrderDescription* order;
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LimitDescription* limit;
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};
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struct JoinStatement : Statement {
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JoinStatement() : Statement(kStmtJoin) {};
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TableRef* table1;
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TableRef* table2;
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JoinType join_type;
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Expr* join_condition;
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};
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struct DeleteStatement : Statement {
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// TODO
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};
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struct InsertStatement : Statement {
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// TODO
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};
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struct CreateStatement : Statement {
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// TODO
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};
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} // namespace hsql
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#endif // __STATEMENT_H__
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