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/*-------------------------------------------------------------------------
*
* tupdesc.h--
* POSTGRES tuple descriptor definitions.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: tupdesc.h,v 1.1.1.1 1996/07/09 06:21:09 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef TUPDESC_H
#define TUPDESC_H
#include "postgres.h"
#include "access/attnum.h"
#include "nodes/pg_list.h" /* for List */
#include "catalog/pg_attribute.h"
/*
* a TupleDesc is an array of AttributeTupleForms, each of which is a
* pointer to a AttributeTupleForm
*/
/* typedef AttributeTupleForm *TupleDesc; */
/* a TupleDesc is a pointer to a structure which includes an array of */
/* AttributeTupleForms, i.e. pg_attribute information, and the size of */
/* the array, i.e. the number of attributes */
/* in short, a TupleDesc completely captures the attribute information */
/* for a tuple */
typedef struct tupleDesc {
int natts;
AttributeTupleForm *attrs;
} *TupleDesc;
extern TupleDesc CreateTemplateTupleDesc(int natts);
extern TupleDesc CreateTupleDesc(int natts, AttributeTupleForm *attrs);
extern TupleDesc CreateTupleDescCopy(TupleDesc tupdesc);
extern bool TupleDescInitEntry(TupleDesc desc,
AttrNumber attributeNumber,
char *attributeName,
char *typeName,
int attdim,
bool attisset);
extern TupleDesc BuildDescForRelation(List *schema, char *relname);
#endif /* TUPDESC_H */
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