row0ext.cc File Reference

#include "row0ext.h"
#include "btr0cur.h"

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Functions
UNIV_INTERN row_ext_t *	row_ext_create (ulint n_ext, const ulint *ext, ulint flags, const dtuple_t *tuple, mem_heap_t *heap)

Detailed Description

Caching of externally stored column prefixes

Created September 2006 Marko Makela

Definition in file row0ext.cc.

Function Documentation

UNIV_INTERN row_ext_t* row_ext_create	(	ulint	n_ext,
		const ulint *	ext,
		ulint	flags,
		const dtuple_t *	tuple,
		mem_heap_t *	heap
	)

Creates a cache of column prefixes of externally stored columns.

Returns

own: column prefix cache

Parameters

n_ext	in: number of externally stored columns
ext	in: col_no's of externally stored columns in the InnoDB table object, as reported by dict_col_get_no(); NOT relative to the records in the clustered index
flags	in: table->flags
tuple	in: data tuple containing the field references of the externally stored columns; must be indexed by col_no; the clustered index record must be covered by a lock or a page latch to prevent deletion (rollback or purge).
heap	in: heap where created

Definition at line 91 of file row0ext.cc.

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