54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
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/*-------------------------------------------------------------------------
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*
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* tupdesc.h--
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* POSTGRES tuple descriptor definitions.
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: tupdesc.h,v 1.1 1996/08/27 21:50:26 scrappy Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef TUPDESC_H
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#define TUPDESC_H
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#include "postgres.h"
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#include "access/attnum.h"
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#include "nodes/pg_list.h" /* for List */
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#include "catalog/pg_attribute.h"
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/*
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* a TupleDesc is an array of AttributeTupleForms, each of which is a
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* pointer to a AttributeTupleForm
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*/
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/* typedef AttributeTupleForm *TupleDesc; */
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/* a TupleDesc is a pointer to a structure which includes an array of */
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/* AttributeTupleForms, i.e. pg_attribute information, and the size of */
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/* the array, i.e. the number of attributes */
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/* in short, a TupleDesc completely captures the attribute information */
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/* for a tuple */
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typedef struct tupleDesc {
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int natts;
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AttributeTupleForm *attrs;
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} *TupleDesc;
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extern TupleDesc CreateTemplateTupleDesc(int natts);
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extern TupleDesc CreateTupleDesc(int natts, AttributeTupleForm *attrs);
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extern TupleDesc CreateTupleDescCopy(TupleDesc tupdesc);
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extern bool TupleDescInitEntry(TupleDesc desc,
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AttrNumber attributeNumber,
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char *attributeName,
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char *typeName,
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int attdim,
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bool attisset);
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extern TupleDesc BuildDescForRelation(List *schema, char *relname);
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#endif /* TUPDESC_H */
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