Opt_trace_iterator Class Reference

Iterator over the list of remembered traces. More...

#include <opt_trace.h>

Public Member Functions
	Opt_trace_iterator (Opt_trace_context *ctx)
void	next ()
	Advances iterator to next trace. More...
void	get_value (Opt_trace_info *info) const
	Provides information about the trace on which the iterator is positioned. More...
bool	at_end () const

Private Attributes
Opt_trace_context *	ctx
	Pointer to context, from which traces are retrieved. More...
const Opt_trace_stmt *	cursor
	trace which the iterator is positioned on More...
long	row_count
	how many traces retrieved so far More...

Detailed Description

Iterator over the list of remembered traces.

Note

due to implementation, the list must not change during an iterator's lifetime, or results may be unexpected (no crash though).

Constructor & Destructor Documentation

Opt_trace_iterator()

Opt_trace_iterator::Opt_trace_iterator

(

Opt_trace_context *

ctx

)

Parameters

ctx

context

Member Function Documentation

at_end()

bool Opt_trace_iterator::at_end ( ) const

inline

Returns

whether iterator is positioned to the end.

get_value()

void Opt_trace_iterator::get_value

(

Opt_trace_info *

info

)

const

Provides information about the trace on which the iterator is positioned.

Parameters

[out]

info

information returned. The usage pattern is 1) instantiate the iterator 2) test at_end(), if false: call get_value() and then next() 3) repeat (2) until at_end() is true.

next()

void Opt_trace_iterator::next

(

)

Advances iterator to next trace.

Member Data Documentation

ctx

Opt_trace_context* Opt_trace_iterator::ctx

private

Pointer to context, from which traces are retrieved.

cursor

const Opt_trace_stmt* Opt_trace_iterator::cursor

private

trace which the iterator is positioned on

row_count

long Opt_trace_iterator::row_count

private

how many traces retrieved so far

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

• sql/opt_trace.h
• sql/opt_trace.cc