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Annotation of 42BSD/ingres/source/qrymod/issue.c, revision 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     7.1     2/5/81)
        !            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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