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/*-------------------------------------------------------------------------
*
* tupdesc.h
* POSTGRES tuple descriptor definitions.
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: tupdesc.h,v 1.32 2001/10/28 06:25:59 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef TUPDESC_H
#define TUPDESC_H
#include "access/attnum.h"
#include "catalog/pg_attribute.h"
#include "nodes/pg_list.h"
typedef struct attrDefault
{
AttrNumber adnum;
char *adbin; /* nodeToString representation of expr */
} AttrDefault;
typedef struct constrCheck
{
char *ccname;
char *ccbin; /* nodeToString representation of expr */
} ConstrCheck;
/* This structure contains constraints of a tuple */
typedef struct tupleConstr
{
AttrDefault *defval; /* array */
ConstrCheck *check; /* array */
uint16 num_defval;
uint16 num_check;
bool has_not_null;
} TupleConstr;
/*
* This structure contains all information (i.e. from Classes
* pg_attribute, pg_attrdef, pg_relcheck) for a tuple.
*/
typedef struct tupleDesc
{
int natts; /* Number of attributes in the tuple */
Form_pg_attribute *attrs;
/* attrs[N] is a pointer to the description of Attribute Number N+1. */
TupleConstr *constr;
} *TupleDesc;
extern TupleDesc CreateTemplateTupleDesc(int natts);
extern TupleDesc CreateTupleDesc(int natts, Form_pg_attribute *attrs);
extern TupleDesc CreateTupleDescCopy(TupleDesc tupdesc);
extern TupleDesc CreateTupleDescCopyConstr(TupleDesc tupdesc);
extern void FreeTupleDesc(TupleDesc tupdesc);
extern bool equalTupleDescs(TupleDesc tupdesc1, TupleDesc tupdesc2);
extern bool TupleDescInitEntry(TupleDesc desc,
AttrNumber attributeNumber,
char *attributeName,
Oid oidtypeid,
int32 typmod,
int attdim,
bool attisset);
extern TupleDesc BuildDescForRelation(List *schema, char *relname);
#endif /* TUPDESC_H */
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