tupdesc_details.h

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/*-------------------------------------------------------------------------
 *
 * tupdesc_details.h
 *    POSTGRES tuple descriptor definitions we can't include everywhere
 *
 *
 * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/access/tupdesc_details.h
 *
 *-------------------------------------------------------------------------
 */
 
#ifndef TUPDESC_DETAILS_H
#define TUPDESC_DETAILS_H
 
/*
 * Structure used to represent value to be used when the attribute is not
 * present at all in a tuple, i.e. when the column was created after the tuple
 */
typedef struct AttrMissing
{
    bool        am_present;     /* true if non-NULL missing value exists */
    Datum       am_value;       /* value when attribute is missing */
} AttrMissing;
 
#endif                          /* TUPDESC_DETAILS_H */