# mysqlpp::UseQueryResult Class Reference

StoreQueryResult set type for "use" queries. More...

`#include <result.h>`

Inheritance diagram for mysqlpp::UseQueryResult:

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Collaboration diagram for mysqlpp::UseQueryResult:

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List of all members.

## Public Member Functions

| UseQueryResult ()
| Default constructor.
| UseQueryResult (MYSQL_RES *result, DBDriver *dbd, bool te=true)
| Create the object, fully initialized.
| UseQueryResult (const UseQueryResult &other)
| Create a copy of another UseQueryResult object.
| ~UseQueryResult ()
| Destroy object.
UseQueryResult & | operator= (const UseQueryResult &rhs)
| Copy another UseQueryResult object's data into this object.
const Field & | fetch_field () const
| Returns the next field in this result set.
const Field & | fetch_field (Fields::size_type i) const
| Returns the given field in this result set.
const unsigned long * | fetch_lengths () const
| Returns the lengths of the fields in the current row of the result set.
Row | fetch_row () const
| Returns the next row in a "use" query's result set.
MYSQL_ROW | fetch_raw_row () const
| Wraps mysql_fetch_row() in MySQL C API.
void | field_seek (Fields::size_type field) const
| Jumps to the given field within the result set.
| operator MYSQL_RES * () const
| Return the pointer to the underlying MySQL C API result set object.

## Detailed Description

StoreQueryResult set type for "use" queries.

See the user manual for the reason you might want to use this even though its interface is less friendly than StoreQueryResult's.

## Member Function Documentation

const unsigned long * mysqlpp::UseQueryResult::fetch_lengths | ( |  | ) | const

| Returns the lengths of the fields in the current row of the result set.

MYSQL_ROW mysqlpp::UseQueryResult::fetch_raw_row | ( |  | ) | const

| Wraps mysql_fetch_row() in MySQL C API.

Row mysqlpp::UseQueryResult::fetch_row | ( |  | ) | const

Returns the next row in a "use" query's result set.

This is a thick wrapper around DBDriver::fetch_row(). It does a lot of error checking before returning the Row object containing the row data.

See also:
  fetch_raw_row()

void mysqlpp::UseQueryResult::field_seek | ( | Fields::size_type | field | ) | const`[inline]`

| Jumps to the given field within the result set. Calling this allows you to reset the default field index used by fetch_field().

mysqlpp::UseQueryResult::operator MYSQL_RES * | ( |  | ) | const`[inline]`

Return the pointer to the underlying MySQL C API result set object.

                  Query q("....");
                  if (UseQueryResult res = q.use()) {
                      // Can use 'res', query succeeded
                  }
                  else {
                      // Query failed, call Query::error() or ::errnum() for why
                  }

The documentation for this class was generated from the following files:

- result.h
- result.cpp