2.11BSD/ingres/source/iutil/paramd.c

# include	"../ingres.h"
# include	"../aux.h"
# include	"../catalog.h"
# include	"../access.h"



/*
**	get access parameters of a relation from its descriptor and return
**	them in struct pointed to by "ap".
*/


paramd(desc, param)
struct descriptor	*desc;
struct accessparam	*param;

{
	register struct descriptor	*d;
	register struct accessparam	*ap;
	register int			i;
	int				p;

	ap = param;
	d = desc;

	ap->mode = getmode(d->relspec);
	ap->sec_index = FALSE;	/* indicate that this isn't the index-rel */

	for (i = 0; i < MAXDOM+1; i++)
		ap->keydno[i] = 0;

	for (p = 1; p <= d->relatts; p++)
		if (i = d->relxtra[p])
			ap->keydno[i-1] = p;
	return (0);
}

parami(ip, param)
struct index		*ip;
struct accessparam	*param;
{
	register struct accessparam	*ap;

	ap  = param;
	ap->mode = getmode(ip->irelspeci);
	ap->sec_index = TRUE;	/* this is an index */

	bmove(ip->idom, ap->keydno, MAXKEYS);
	ap->keydno[MAXKEYS] = 0;
	return(0);
}


getmode(spec)
int	spec;
{
	switch (abs(spec))
	{
	  case M_HEAP:
		return(NOKEY);

	  case M_ISAM:
		return(LRANGEKEY);

	  case M_HASH:
		return(EXACTKEY);

	  default: 
		syserr("getmode:bad relspec %d", spec);
	}
}