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/*-------------------------------------------------------------------------
*
* tupconvert.h
* Tuple conversion support.
*
*
* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/tupconvert.h
*
*-------------------------------------------------------------------------
*/
#ifndef TUPCONVERT_H
#define TUPCONVERT_H
#include "access/htup.h"
#include "access/tupdesc.h"
typedef struct TupleConversionMap
{
TupleDesc indesc; /* tupdesc for source rowtype */
TupleDesc outdesc; /* tupdesc for result rowtype */
AttrNumber *attrMap; /* indexes of input fields, or 0 for null */
Datum *invalues; /* workspace for deconstructing source */
bool *inisnull;
Datum *outvalues; /* workspace for constructing result */
bool *outisnull;
} TupleConversionMap;
extern TupleConversionMap *convert_tuples_by_position(TupleDesc indesc,
TupleDesc outdesc,
const char *msg);
extern TupleConversionMap *convert_tuples_by_name(TupleDesc indesc,
TupleDesc outdesc,
const char *msg);
extern AttrNumber *convert_tuples_by_name_map(TupleDesc indesc,
TupleDesc outdesc,
const char *msg);
extern HeapTuple do_convert_tuple(HeapTuple tuple, TupleConversionMap *map);
extern void free_conversion_map(TupleConversionMap *map);
#endif /* TUPCONVERT_H */