Row_data_memory Class Reference

Public Member Functions
	Row_data_memory (TABLE *table, size_t const len1)
	Row_data_memory (TABLE *table, size_t const len1, size_t const len2)
bool	has_memory () const
uchar *	slot (uint s)

Detailed Description

Class to handle temporary allocation of memory for row data.

The responsibilities of the class is to provide memory for packing one or two rows of packed data (depending on what constructor is called).

In order to make the allocation more efficient for "simple" rows, i.e., rows that do not contain any blobs, a pointer to the allocated memory is of memory is stored in the table structure for simple rows. If memory for a table containing a blob field is requested, only memory for that is allocated, and subsequently released when the object is destroyed.

Definition at line 8075 of file binlog.cc.

Constructor & Destructor Documentation

Row_data_memory::Row_data_memory ( TABLE *  table, size_t const  len1  )

inline

Build an object to keep track of a block-local piece of memory for storing a row of data.

Parameters

table	Table where the pre-allocated memory is stored.
length	Length of data that is needed, if the record contain blobs.

Definition at line 8087 of file binlog.cc.

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Member Function Documentation

bool Row_data_memory::has_memory ( ) const

inline

Is there memory allocated?

Return values

true	There is memory allocated
false	Memory allocation failed

Definition at line 8121 of file binlog.cc.

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

• sql/binlog.cc