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