#include <result.h>
Inheritance diagram for pqxx::result::field:
Public Types | |
typedef size_t | size_type |
Public Member Functions | |
field (const tuple &R, tuple::size_type C) | |
Constructor. | |
const char * | c_str () const |
Read as plain C string. | |
const char * | Name () const |
Column name. | |
template<typename T> bool | to (T &Obj) const |
Read value into Obj; or leave Obj untouched & return false if null. | |
template<typename T> bool | to (T &Obj, const T &Default) const |
Read value into Obj; or use Default & return false if null. | |
template<typename T> T | as (const T &Default) const |
Return value as object of given built-in type, or Default if null. | |
bool | is_null () const |
size_type | size () const |
A field represents one entry in a tuple. It represents an actual value in the result set, and can be converted to various types.
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Reimplemented from pqxx::result::tuple. |
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Constructor. Create field as reference to a field in a result set.
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Return value as object of given built-in type, or Default if null. Note that unless the function is instantiated with an explicit template argument, the Default value also determines the result type. |
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Read as plain C string. Since the field's data is stored internally in the form of a zero-terminated C string, this is the fastest way to read it. Use the to() functions to convert the string to other types such as int, or to C++ strings. |
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Column name.
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Reimplemented from pqxx::result::tuple. |
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Read value into Obj; or use Default & return false if null.
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Read value into Obj; or leave Obj untouched & return false if null.
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