Blob_mem_storage Class Reference

Class is used as a BLOB field value storage for intermediate GROUP_CONCAT results. More...

#include <table.h>

Public Member Functions
	Blob_mem_storage ()
	~Blob_mem_storage ()
void	reset ()
char *	store (const char *from, size_t length)
	Function creates duplicate of 'from' string in 'storage' MEM_ROOT. More...
void	set_truncated_value (bool is_truncated_value)
bool	is_truncated_value () const

Private Attributes
MEM_ROOT	storage
bool	truncated_value
	Sign that some values were cut during saving into the storage. More...

Detailed Description

Class is used as a BLOB field value storage for intermediate GROUP_CONCAT results.

Used only for GROUP_CONCAT with DISTINCT or ORDER BY options.

Constructor & Destructor Documentation

Blob_mem_storage()

Blob_mem_storage::Blob_mem_storage

(

)

~Blob_mem_storage()

Blob_mem_storage::~Blob_mem_storage

(

)

Member Function Documentation

is_truncated_value()

bool Blob_mem_storage::is_truncated_value ( ) const

inline

reset()

void Blob_mem_storage::reset ( void  )

inline

set_truncated_value()

void Blob_mem_storage::set_truncated_value ( bool  is_truncated_value )

inline

store()

char * Blob_mem_storage::store ( const char *  from, size_t  length  )

inline

Function creates duplicate of 'from' string in 'storage' MEM_ROOT.

Parameters

from	string to copy
length	string length

Return values

Pointer	to the copied string.
0	if an error occurred.

Member Data Documentation

storage

MEM_ROOT Blob_mem_storage::storage

private

truncated_value

bool Blob_mem_storage::truncated_value

private

Sign that some values were cut during saving into the storage.

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

• sql/table.h
• sql/table.cc