#include <Pt/Db/Result.h>
Buffered query result with random-access rows. More...
Classes | |
| class | ConstIterator |
| Random-access iterator over the rows of a Result. More... | |
Public Member Functions | |
| Result () | |
| Creates an unbound result. | |
| Result (IResult *res) | |
| Takes ownership of the backend res. | |
| Row | getRow (size_type row_num) const |
| Returns the row at row_num without range checking. | |
| Value | getValue (size_type row_num, size_type field_num) const |
| Returns the value at row_num, field_num without range checking. | |
| size_type | size () const |
| Returns the number of rows. | |
| bool | empty () const |
| Returns true if this result has no rows. | |
| size_type | getFieldCount () const |
| Returns the number of columns. | |
| Row | operator[] (size_type row_num) const |
| Returns the row at row_num without range checking. | |
| ConstIterator | begin () const |
| Returns a random-access iterator to the first row. | |
| ConstIterator | end () const |
| Returns a random-access iterator past the last row. | |
| bool | operator! () const |
| Returns true if this object is not bound to a result. | |
| const IResult * | getImpl () const |
| Returns the backend implementation. | |
Result is the in-memory result the group described. Rows are addressed by index and visited with a random-access iterator. The set can be walked more than once. It is a shared value. An unbound result is empty; operator!() is true then.
size() is the number of rows. getFieldCount() is the number of columns. empty() is true when there are no rows. operator[] and getRow() return a Row without range checking. getValue() returns a column of a row the same way. begin() and end() are random-access iterators, so the result can be used with standard algorithms.
Once a Result is returned, the connection can run another statement. For a set that should not be fully buffered, use a Cursor.