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Annotation of 43BSD/ingres/source/qrymod/issue.c, revision 1.1.1.1

1.1       root        1: # include      <ingres.h>
                      2: # include      <aux.h>
                      3: # include      <symbol.h>
                      4: # include      <tree.h>
                      5: # include      <pv.h>
                      6: # include      "qrymod.h"
                      7: # include      <sccs.h>
                      8: 
                      9: SCCSID(@(#)issue.c     8.1     12/31/84)
                     10: 
                     11: /*
                     12: **  ISSUE -- issue query to rest of system
                     13: **
                     14: **     This function issues a query to the rest of the INGRES system.
                     15: **     The sync from below is read, but not passed up.
                     16: **
                     17: **     Parameters:
                     18: **             tree -- pointer to tree to issue.
                     19: **
                     20: **     Returns:
                     21: **             none.
                     22: **
                     23: **     Side Effects:
                     24: **             A query is executed.
                     25: **
                     26: **     Trace Flags:
                     27: **             71
                     28: */
                     29: 
                     30: issue(state, tree)
                     31: int    state;
                     32: QTREE  *tree;
                     33: {
                     34: #      ifdef xQTR2
                     35:        if (tTf(71, 0))
                     36:                printf("issue:\n");
                     37: #      endif
                     38: 
                     39:        initp();
                     40:        setp(PV_QTREE, tree, 0);
                     41:        call(state, NULL);
                     42: }
                     43: /*
                     44: **  ISSUEINVERT -- issue a query, but invert the qualification
                     45: **
                     46: **     This routine is similar to 'issue', except that it issues
                     47: **     a query with the qualification inverted.  The inversion
                     48: **     (and subsequent tree normalization) is done on a duplicate
                     49: **     of the tree.
                     50: **
                     51: **     Parameters:
                     52: **             root -- the root of the tree to issue.
                     53: **
                     54: **     Returns:
                     55: **             none.
                     56: **
                     57: **     Side Effects:
                     58: **             'root' is issued.
                     59: **
                     60: **     Trace Flags:
                     61: **             none
                     62: */
                     63: 
                     64: issueinvert(root)
                     65: QTREE  *root;
                     66: {
                     67:        register QTREE  *t;
                     68:        register QTREE  *uop;
                     69:        extern QTREE    *treedup();
                     70:        extern QTREE    *trimqlend(), *norml();
                     71: 
                     72:        /* make duplicate of tree */
                     73:        t = treedup(root);
                     74: 
                     75:        /* prepend NOT node to qualification */
                     76:        uop = (QTREE *) need(Qbuf, QT_HDR_SIZ + sizeof(short));
                     77:        uop->left = NULL;
                     78:        uop->right = t->right;
                     79:        uop->sym.type = UOP;
                     80:        uop->sym.len = sizeof(short);
                     81:        uop->sym.value.sym_op.opno = opNOT;
                     82:        t->right = uop;
                     83: 
                     84:        /* normalize and issue */
                     85:        t->right = norml(trimqlend(t->right));
                     86:        issue(mdQRY, t);
                     87: }

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