1: # include   "../ingres.h"
   2: # include   "../aux.h"
   3: # include   "../tree.h"
   4: # include   "../pipes.h"
   5: # include   "../symbol.h"
   6: # include   "parser.h"
   7: 
   8: /*
   9: ** XDOT
  10: **	add to attribute stash any missing attributes in the
  11: **	source relation and then build tree with all attribs
  12: **	in the 'attid' order.  This algorithm assumes that
  13: **	the function 'attadd' insert attributes into the list
  14: **	in 'attid' order from 1 -> N.
  15: */
  16: struct querytree *
  17: xdot(rptr)
  18: struct rngtab   *rptr;
  19: {
  20:     struct attribute        tuple;
  21:     register struct attribute   *ktuple;
  22:     struct attribute        ktup;
  23:     struct tup_id           tid;
  24:     struct tup_id           limtid;
  25:     struct querytree        *tempt;
  26:     register struct querytree   *vnode;
  27:     int             ik;
  28:     register struct atstash     *aptr;
  29:     struct querytree        *tree();
  30:     struct querytree        *addresdom();
  31: 
  32: #	ifdef xPTR2
  33:     tTfp(15, 0, "ALL being processed for %s\n", rptr->relnm);
  34: #	endif
  35: 
  36:     /* if attstash is missing any attribs then fill in list */
  37:     if (rptr->ratts != attcount(rptr))
  38:     {
  39:         /* get all entries in attrib relation */
  40:         clearkeys(&Desc);
  41:         ktuple = &ktup;
  42:         setkey(&Desc, ktuple, rptr->relnm, ATTRELID);
  43:         setkey(&Desc, ktuple, rptr->relnowner, ATTOWNER);
  44:         if (ik = find(&Desc, EXACTKEY, &tid, &limtid, ktuple))
  45:             syserr("bad find in xdot '%d'", ik);
  46:         while (!get(&Desc, &tid, &limtid, &tuple, 1))
  47:             if (!kcompare(&Desc, &tuple, ktuple))
  48:                 /* add any that are not in the stash */
  49:                 if (!attfind(rptr, tuple.attname))
  50:                     attadd(rptr, &tuple);
  51:     }
  52: 
  53:     /* build tree for ALL */
  54:     tempt = NULL;
  55:     aptr = rptr->attlist;
  56:     while (aptr != 0)
  57:     {
  58:         vnode = tree(NULL, NULL, VAR, 6, rptr->rentno, aptr);
  59:         Trname = aptr->atbname;
  60:         tempt = addresdom(tempt, vnode);
  61:         aptr = aptr->atbnext;
  62:     }
  63:     return(tempt);
  64: }

Defined functions

xdot defined in line 16; used 1 times
Last modified: 1995-02-18
Generated: 2016-12-26
Generated by src2html V0.67
page hit count: 955
Valid CSS Valid XHTML 1.0 Strict