void Parser::delete_stmt(){
match("DELETE");
match("FROM");
match("ID");
where_clause();
match(";");
}
void Parser::query_stmt() {
match("SELECT");
select_list();
match("FROM");
match("ID");
where_clause();
match(";");
}
const Delete &delete_stmt() {
if (lookahead == DELETE) {
// delete_stmt -> DELETE FROM id where_clause SEMICOLON
match(DELETE); match(FROM);
string table_id = id();
Expr where = where_clause();
match(SEMICOLON);
return Delete(table_id, where);
} else {
throw ParseError("Syntax error");
}
}
const Query &query_stmt() {
if (lookahead == SELECT) {
// query_stmt -> SELECT select_list FROM id where_clause SEMICOLON
vector<string> columns;
match(SELECT); select_list(columns); match(FROM);
string table_id = id();
Expr where = where_clause();
match(SEMICOLON);
return Query(table_id, columns, where);
} else {
throw ParseError("Syntax error");
}
}
where_clause &select_query::where(const string &value)
{
where_ = where_clause(value);
return where_;
}
