void
itof(register sym_t *p)
{
#ifdef xOTR3
if (tTf(87, 2)) {
printf("itof: ");
prsym(p);
}
#endif
if (p->len == 4)
p->value.sym_data.f8type = p->value.sym_data.i4type;
else if (p->len == 2)
p->value.sym_data.f8type = p->value.sym_data.i2type;
else
p->value.sym_data.f8type = p->value.sym_data.i1type;
p->type = FLOAT_CONST;
p->len= 8;
#ifdef xOTR3
if (tTf(87, 2)) {
printf("itof rets: ");
prsym(p);
}
#endif
}
int
get(desc_t *d, tid_t *tid, tid_t *limtid, void *tuple, int getnxt)
{
register int i;
long pageid, lpageid;
#ifdef xATR1
if (tTf(23, 0)) {
printf("get: %.14s,", d->d_r.r_id);
dumptid(tid);
printf("get: lim");
dumptid(limtid);
}
#endif
if (get_page(d, tid)) {
return (-1);
}
if (getnxt) {
pluck_page(limtid, &lpageid);
do {
while (((++(tid->line_id)) & I1MASK) >= Acc_head->am_nextline) {
tid->line_id = -1;
pageid = Acc_head->am_overflowpg;
stuff_page(tid, &pageid);
if (pageid == 0) {
pageid = Acc_head->am_mainpg;
stuff_page(tid, &pageid);
if (pageid == 0 || pageid == lpageid + 1)
return (1);
}
if ((i = resetacc(Acc_head)) != 0)
return (i);
if ((i = get_page(d, tid)) != 0)
return (i);
}
} while (!Acc_head->am_linev[-(tid->line_id & I1MASK)]);
} else {
if ((i = invalid(tid)) != 0)
return (i);
}
get_tuple(d, tid, tuple);
#ifdef xATR2
if (tTf(23, 1)) {
printf("get: ");
printup(d, tuple);
}
#endif
return (0);
}
int
display(int pc, paramv_t *pv)
{
register int ac;
register paramv_t *av;
int err;
char err_array[PV_MAXPC];
int mode;
#ifdef xZTR1
if (tTf(50, -1)) {
printf("display: ");
prvect(pc, pv);
}
#endif
err = 0;
if (pc % 2 != 0)
syserr("display: bad param count %d", pc);
opencatalog("tree", OR_READ);
for (ac = 0, av = pv; ac < pc; av++, ac++) {
mode = atoi(av->pv_val.pv_str);
av++;
err_array[ac++] = 0;
err_array[ac] = disp(av->pv_val.pv_str, mode);
}
for (ac = 0, av = pv; ac < pc; av++, ac++) {
if (err_array[ac])
err = error(DISPERRBASE + err_array[ac], (av->pv_val).pv_str, 0);
}
return (err);
}
/*
** Check the range table to see if any
** relations changed since the last call
** to newquery. If so, they were caused
** by reformat. Restore back the orig relation
** Reopen it if reopen == TRUE.
*/
void
endquery(int *locrang, int reopen)
{
register struct rang_tab *rp;
register int *ip, i;
int old;
bool dstr_flag;
rp = De.de_rangev;
ip = locrang;
dstr_flag = FALSE;
initp();
for (i = 0; i < MAX_RANGES; i++) {
if (rp->relnum != *ip) {
#ifdef xDTR1
if (tTf(63, -1))
printf("reformat or reduct changed var %d (%d,%d)\n", i, *ip, rp->relnum);
#endif
old = new_range(i, *ip);
dstr_flag |= dstr_mark(old);
if (reopen)
openr1(i);
}
ip++;
rp++;
}
if (dstr_flag)
call_dbu(mdDESTROY, FALSE);
else
resetp();
}
/*
** PR_INTEGRITY -- print out integrity constraints on a relation
**
** Finds all integrity tuples for this unique relation, and
** calls pr_int() to print a query from them.
**
** Parameters:
** relid -- rel name
** relowner -- 2 byte owner id
**
** Returns:
** none
**
** Side Effects:
** file activity, query printing
**
** Trace Flags:
** 33, 9
*/
void
pr_integrity(char *relid, char *relowner)
{
extern desc_t Intdes;
tid_t hitid, lotid;
struct integrity key, tuple;
register int i;
#ifdef xZTR1
if (tTf(50, 9))
printf("pr_integrity(relid =%s, relowner=%s)\n",
relid, relowner);
#endif
printf("Integrity constraints on %s are:\n\n", relid);
opencatalog("integrities", OR_READ);
/* get integrities tuples for relid, relowner */
clearkeys(&Intdes);
ingres_setkey(&Intdes, &key, relid, INTRELID);
ingres_setkey(&Intdes, &key, relowner, INTRELOWNER);
if ((i = find(&Intdes, EXACTKEY, &lotid, &hitid, &key)) != 0)
syserr("pr_integrity: find %d", i);
for (;;) {
if ((i = get(&Intdes, &lotid, &hitid, &tuple, TRUE)) != 0)
break;
if (kcompare(&Intdes, &tuple, &key) == 0)
pr_int(&tuple, relid);
}
if (i != 1)
syserr("pr_integrity: get %d", i);
}
branch()
{
register char c;
register int i;
extern char getch();
# ifdef xMTR2
if (tTf(16, -1))
printf(">>branch: ");
# endif
/* see if conditional */
while ((c = getch()) > 0)
if (c != ' ' && c != '\t')
break;
if (c == '?')
{
/* got a conditional; evaluate it */
Oneline = TRUE;
macinit(&getch, 0, 0);
i = expr();
if (i <= 0)
{
/* no branch */
# ifdef xMTR2
if (tTf(16, 0))
printf("no branch\n");
# endif
getfilename();
return;
}
}
else
{
Peekch = c;
}
/* get the target label */
if (branchto(getfilename()) == 0)
if (branchto(macro("{default}")) == 0)
{
Peekch = -1;
printf("Cannot branch\n");
}
return;
}
/*
** EXEC_SQ
**
** Execute the subqueries in sqlist. Associated with
** each sub-query is a relation number stored in sqrange.
** If the sub-query has a non-null target list, the range
** table is updated to reflect the new range of the relation.
**
** If any sub-query is false, all subsequent ones are ignored
** by ovqp and exec_sq returns the var number of the false subquery.
**
** As a side effect, "disj" is incremented for each disjoint sub-query
**
** Trace Flags:
** 35
*/
int
exec_sq(qtree_t **sqlist, int *sqrange, int *disj)
{
register qtree_t *sq;
register int i, qualfound;
#ifdef xDTR1
if (tTf(35, 0))
printf("EXEC_SQ--\n");
#endif
*disj = 0;
for (i = 0; i < MAX_RANGES; i++) {
if ((sq = sqlist[i]) != 0) {
#ifdef xDTR1
if (tTf(35, 1))
printf("sq[%d]=%p\n", i, sq);
#endif
qualfound = execsq1(sq, i, sqrange[i]);
#ifdef xDTR1
if (tTf(35, 2))
printf("qualfound=%d\n", qualfound);
#endif
if (!qualfound) {
return(i);
}
if (sq->left->sym.type != TREE) {
/*
** Update the range table and open
** the relation's restricted replacement.
*/
new_range(i, sqrange[i]);
openr1(i);
} else {
(*disj)++;
}
}
}
return (-1);
}
void
i4toi2(sym_t *pp)
{
register sym_t *p;
#ifdef xOTR3
if (tTf(87, 1)) {
printf("i4toi2: ");
prsym(pp);
}
#endif
p = pp;
*(i2type *)&p->value = *(i4type *)&p->value;
p->len = 2;
#ifdef xOTR3
if (tTf(87, 1)) {
printf("i4toi2 rets: ");
prsym(p);
}
#endif
}
void
i2toi4(sym_t *pp)
{
register sym_t *p;
#ifdef xOTR3
if (tTf(87, 0)) {
printf("i2toi4: ");
prsym(pp);
}
#endif
p = pp;
*(i4type *)&p->value = *(i2type *)&p->value;
p->len = 4;
#ifdef xOTR3
if (tTf(87, 0)) {
printf("i2toi4 rets: ");
prsym(p);
}
#endif
}
void
ftoi4(register sym_t *p)
{
#ifdef xOTR3
if (tTf(87, 4)) {
printf("ftoi4: ");
prsym(p);
}
#endif
if (p->len == 4)
p->value.sym_data.i4type = p->value.sym_data.f4type;
else
p->value.sym_data.i4type = p->value.sym_data.f8type;
p->type = INT_CONST;
p->len = 4;
#ifdef xOTR3
if (tTf(87, 4)) {
printf("ftoi4 rets: ");
prsym(p);
}
#endif
}
/*
** UNDO_SQ
**
** Undo the effects of one variable detachment on
** the range table. The two parameters "limit" and
** "maxlimit" describe how far down the list of
** subqueries were processed. Maxlimit represents
** the furthest every attained and limit represents
** the last variable processed the last time.
**
** Trace Flags:
** 36
*/
void
undo_sq(qtree_t **sqlist, int *locrang, int *sqrange, int limit, int maxlimit, int reopen)
{
register qtree_t *sq;
register int i, lim;
bool dstr_flag;
dstr_flag = 0;
#ifdef xDTR1
if (tTf(36, 0))
printf("UNDO_SQ--\n");
#endif
initp(); /* setup parm vector for destroys */
lim = limit == -1 ? MAX_RANGES : limit;
if (maxlimit == -1)
maxlimit = MAX_RANGES;
for (i = 0; i < MAX_RANGES; i++)
if ((sq = sqlist[i]) != 0) {
if (sq->left->sym.type != TREE) {
if (i < lim) {
/* The query was run. Close the temp rel */
closer1(i);
}
/* mark the temporary to be destroyed */
dstr_mark(sqrange[i]);
dstr_flag = TRUE;
/* reopen the original relation. If maxlimit
** never reached the variable "i" then the
** original relation was never closed and thus
** doesn't need to be reopened.
*/
rstrang(locrang, i);
if (reopen && i < maxlimit)
openr1(i);
}
}
/* Only call destroy if there's something to destroy */
if (dstr_flag)
call_dbu(mdDESTROY, FALSE);
else
resetp();
}
/*
** MERGEVAR -- merge variable numbers to link terms
**
** One specified variable gets mapped into another, effectively
** merging those two variables. This is used for protection
** and integrity, since the constraint read from the tree
** must coincide with one of the variables in the query tree.
**
** Parameters:
** va -- the variable which will dissappear.
** vb -- the variable which 'va' gets mapped into.
** root -- the root of the tree to map.
**
** Returns:
** none
**
** Side Effects:
** The tree pointed at by 'root' gets VAR and RESDOM
** nodes mapped.
** Range table entry for 'va' is deallocated.
** The 'Qt.qt_remap' vector gets reset and left in an
** undefined state.
**
** Trace Flags:
** 72
*/
void
mergevar(register int a, register int b, qtree_t *root)
{
register int i;
#ifdef xQTR1
if (tTf(72, 0)) {
printf("\nmergevar(%d->%d)", a, b);
treepr(root);
}
#endif
/*
** Insure that 'a' and 'b' are consistant, that is,
** that they both are in range, are defined, and range over
** the same relation.
*/
if (a < 0 || b < 0 || a >= MAX_VARS + 1 || b >= MAX_VARS + 1)
syserr("mergevar: range %d %d", a, b);
if (Qt.qt_rangev[a].rngvdesc == NULL || Qt.qt_rangev[b].rngvdesc == NULL)
syserr("mergevar: undef %d %d", a, b);
if (!bequal(Qt.qt_rangev[a].rngvdesc->d_r.r_id,
Qt.qt_rangev[b].rngvdesc->d_r.r_id, MAX_NAME_SIZE) ||
!bequal(Qt.qt_rangev[a].rngvdesc->d_r.r_owner,
Qt.qt_rangev[b].rngvdesc->d_r.r_owner, 2)) {
syserr("mergevar: incon %.14s %.14s",
Qt.qt_rangev[a].rngvdesc->d_r.r_id,
Qt.qt_rangev[b].rngvdesc->d_r.r_id);
}
/*
** To do the actual mapping, we will set up 'Qt.qt_remap' and
** call 'mapvars()'. This is because I am too lazy to
** do it myself.
*/
for (i = 0; i < MAX_RANGES; i++)
Qt.qt_remap[i] = i;
Qt.qt_remap[a] = b;
mapvars(root);
/* delete a from the range table */
declare(a, NULL);
}
/*
** PR_DEF -- Print "define view" query of a view
**
** Parameters:
** relation -- relation in question
** owner -- relowner
**
** Returns:
** none
**
** Side Effects:
** reads a tree, clears range table
**
** Trace Flags:
** 33, 9
*/
void
pr_def(char *relation, char *owner)
{
register qtree_t *t;
#ifdef xZTR1
if (tTf(50, 9))
printf("pr_def(relation=\"%s\", owner=%s)\n", relation, owner);
#endif
printf("View %s defined:\n\n", relation);
clrrange();
/* Treeid == 0 because views have only one definition */
t = gettree(relation, owner, mdVIEW, 0,FALSE);
pr_range();
printf("define view ");
pr_tree(t);
}
/*
** DISP -- display integrity, permit, or define query on a relation
**
** Finds a relation owned by the user or the DBA and passes
** the name and owner to the appropritae routine depending on
** mode.
**
** Parameters:
** relation -- relation on which query is to be printed
** mode -- the print mode:
** 4 -- view
** 5 -- permit
** 6 -- integrity
**
** Returns:
** 0 -- success
** 1 -- no such relation, or none seeable by the user.
** 3 -- VIEW mode and relation not a view
** 4 -- PERMIT and no permissions on relation
** 5 -- INTEGRITY mode and no integrity constraints
**
** Trace Flags:
** 33, 8
*/
int
disp(char *relation, int mode)
{
desc_t d;
register int i;
extern char *Resrel;
#ifdef xZTR1
if (tTf(50, 8))
printf("disp: relation %s\n", relation);
#endif
Resrel = relation;
i = openr(&d, OR_RELTID, relation);
if (i > 0)
return (1);
else if (i < 0)
syserr("disp: openr(%s) ret %d", relation, i);
switch (mode) {
case 4: /* View query */
if (d.d_r.r_status & S_VIEW)
pr_def(relation, d.d_r.r_owner);
else
return (3);
break;
case 5:
if (pr_prot(relation, (relation_t *) &d))
return (4);
break;
case 6:
if (d.d_r.r_status & S_INTEG)
pr_integrity(relation, d.d_r.r_owner);
else
return (5);
break;
default:
syserr("disp: mode == %d", mode);
}
return (0);
}
/*
** CM_CLEANUP -- cleanup after interrupt or error.
**
** This routine does things like call the interrupt cleanup
** function, reset the input, etc.
**
** Parameters:
** typ -- the type of cleanup:
** 1 -- fatal error (from error [error.c]).
** 2 -- keyboard interrupt.
**
** Returns:
** never (uses non-local jump to ctlmod/main.c).
**
** Side Effects:
** Proc_name & Cm.cm_input are reset.
**
** Trace Flags:
** 0
*/
void
cm_cleanup(int typ)
{
register int i;
register func_t *f;
extern jmp_buf CmReset;
register ctx_t *ctx;
#ifdef xCTR2
if (tTf(0, 13))
printf("cm_cleanup: %d\n", typ);
#endif
/*
** Call all interrupt cleanup functions for active
** modules.
*/
for (i = 0; i < NumFunc; i++) {
f = FuncVect[i];
if (f->fn_active > 0) {
setprocname(Ctx.ctx_name = f->fn_name);
(*f->fn_cleanup)(typ);
}
}
/* clean up memory */
for (ctx = &Ctx; ctx != NULL; ctx = ctx->ctx_link) {
if (ctx->ctx_qt != NULL) {
xfree(ctx->ctx_qt);
}
if (ctx->ctx_glob != NULL) {
bmove(ctx->ctx_glob, ctx->ctx_fn->fn_gptr, ctx->ctx_fn->fn_gsize);
xfree(ctx->ctx_glob);
}
}
/* return to top of loop */
longjmp(CmReset, typ);
}
/*
** PB_PUT -- buffered put on pipe
**
** This routine puts the named data out onto the pipe
** determined by ppb->pb_proc.
**
** Parameters:
** dp -- a pointer to the data to write.
** len -- the length of the data to write.
** ppb -- a pointer to the pipe block.
**
** Returns:
** none
**
** Side Effects:
** none
**
** Trace Flags:
** 18.8 - 18.15
*/
void
pb_put(register char *dp, register int len, register pb_t *ppb)
{
register int i;
#ifdef xCTR2
if (tTf(18, 9))
lprintf("pb_put: len %d\n", len);
#endif
/*
** Top loop.
** Loop until we have run out of things to write.
*/
while (len > 0) {
/* compute the length to move */
i = min(ppb->pb_nleft, len);
#ifdef xCM_DEBUG
if (i <= 0)
syserr("pb_put: zero");
#endif
/* move data into buffer and adjust ptrs & counts */
bmove(dp, ppb->pb_xptr, i);
dp += i;
len -= i;
ppb->pb_xptr += i;
ppb->pb_nleft -= i;
ppb->pb_nused += i;
/* flush block if full */
if (ppb->pb_nleft <= 0)
pb_write(ppb);
}
}
int
copy(int pc, paramv_t *pv)
{
extern char *Usercode;
extern int Noupdt;
register int i, pid;
register char *cp;
int stat;
int op;
#ifdef xZTR1
if (tTf(30,1)) {
printf("entered copy\n");
prvect(pc, pv);
}
#endif
Duptuple = 0;
Truncount = 0;
Tupcount = 0;
Baddoms = 0;
Relname = pv[0].pv_val.pv_str;
Into = (pv[pc-2].pv_val.pv_str[0] == 'i');
Filename = pv[pc-1].pv_val.pv_str;
/* relation must exist and not be a system relation */
/* in addition a copy "from" can't be done if the user */
/* doesn't own the relation */
/* and furthermore it can't have an index */
i = 0; /* assume all is well */
if ((op = openr(&Des, OR_WRITE, Relname)) != 0) {
if (op == AMOPNVIEW_ERR)
i = NOCPVIEW;
else {
if (op < 0)
syserr("COPY: openr 1 (%.14s) %d", Relname, op);
else
/* non-existant relation */
i = NOEXIST;
}
} else {
if (Into) {
if ((Des.d_r.r_status & S_PROTALL)
&& (Des.d_r.r_status & S_PROTRET)
&& !bequal(Usercode, Des.d_r.r_owner, USERCODE_SIZE))
i = RELPROTECT;
} else {
/* extra checking if this is a copy "from" */
/* must be owned by the user */
if (!bequal(Usercode, Des.d_r.r_owner, USERCODE_SIZE))
i = NOTOWNER;
else
/* must be updateable */
if ((Des.d_r.r_status & S_NOUPDT) && Noupdt)
i = NOUPDT;
else
/* must not be indexed */
if (Des.d_r.r_indexed > 0)
i = DESTINDEX;
}
}
if (i) {
closer(&Des);
return (error(i, Relname, 0)); /* relation doesn't exist for this user */
}
/* check that file name begins with a "/" */
cp = Filename;
while (*cp == ' ')
cp++;
if (*cp != '/') {
closer(&Des);
return (error(FULLPATH, Filename, 0));
}
/* fill map structures with transfer information */
if ((i = mapfill(&pv[1])) != 0) {
closer(&Des);
return (i); /* error in user semantics */
}
/* fork a child process which will run as the real user */
/* that child will complete the copy and exit */
if (pipe(Piped))
syserr("copy:can't make pipe");
if ((pid = fork()) < 0)
syserr("copy:can't fork");
if (pid) {
/* the ingres parent */
close(Piped[1]);
ruboff(0); /* interrupts off */
stat = fullwait(pid, "copy");
if (read(Piped[0], &Des.d_addc, 4) != 4)
syserr("copy:can't read pipe");
close(Piped[0]);
closer(&Des); /* close the rel */
rubon();
/* if stat is != 0 then add on 5800 for error */
if (stat)
stat += 5800;
return (stat); /* done */
}
/* the child. change to run as the real user */
if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
signal(SIGINT, copydone); /* clean up on rubout */
}
setuid(getuid());
setgid(getgid());
if (Into) {
/* from relation into file */
if ((File_iop = fopen(Filename, "w")) == NULL) /* create file for user */
i = nferror(NOFILECRT, Filename, 0); /* cant create file */
else {
if (Lockrel) /* set a shared lock on relation*/
setrll(A_SLP, &Des.d_tid, M_SHARE);
i = rel_file();
}
} else {
/* from UNIX file into relation */
if ((File_iop = fopen(Filename, "r")) == NULL)
i = nferror(NOFILEOPN, Filename, 0); /* cant open user file */
else {
if (Lockrel) /* set an exclusive lock on relat*/
setrll(A_SLP, &Des.d_tid, M_EXCL);
i = file_rel();
if (Duptuple)
nferror(DUPTUPS, locv(Duptuple), 0); /* warning only */
if (Baddoms)
nferror(BADDOMS, locv(Baddoms), 0); /* warning only */
}
}
copydone(i);
return(0);
}
qryproc()
{
register struct querytree *root, *q;
register int i;
int mode, result_num, retr_uniq;
struct querytree *trbuild();
extern long Accuread, Accuwrite, Accusread;
extern int derror();
extern struct querytree *readqry();
# ifdef xDTM
if (tTf(76, 1))
timtrace(23, 0);
# endif
# ifdef xDTR1
if (tTf(50, 0))
{
Accuread = 0;
Accusread = 0;
Accuwrite = 0;
}
# endif
/* initialize query buffer */
initbuf(Qbuf, QBUFSIZ, QBUFFULL, &derror);
/* init various variables in decomp for start of this query */
startdecomp();
/* Read in query, range table and mode */
root = readqry();
mode = Qmode;
/* Initialize relation descriptors */
initdesc(mode);
/* re-build the tree */
root = trbuild(root);
if (root == NULL)
derror(STACKFULL);
/* locate pointers to QLEND and TREE nodes */
for (q = root->right; q->sym.type != QLEND; q = q->right);
Qle = q;
for (q = root->left; q->sym.type != TREE; q = q->left);
Tr = q;
/* map the complete tree */
mapvar(root, 0);
/* set logical locks */
if (Lockrel)
lockit(root, Resultvar);
/* If there is no result variable then this must be a retrieve to the terminal */
Qry_mode = Resultvar < 0 ? mdRETTERM : mode;
/* if the mode is retrieve_unique, then make a result rel */
retr_uniq = mode == mdRET_UNI;
if (retr_uniq)
{
mk_unique(root);
mode = mdRETR;
}
/* get id of result relation */
if (Resultvar < 0)
result_num = NORESULT;
else
result_num = Rangev[Resultvar].relnum;
/* evaluate aggregates in query */
aggregate(root);
/* decompose and process aggregate free query */
decomp(root, mode, result_num);
/* If this is a retrieve unique, then retrieve results */
if (retr_uniq)
pr_unique(root, Resultvar);
if (mode != mdRETR)
i = ACK;
else
i = NOACK;
i = endovqp(i);
/* call update processor if batch mode */
if (i == UPDATE)
{
initp();
call_dbu(mdUPDATE, -1);
}
/*
** send eop back to parser to indicate completion
** if UPDATE then return block comes from dbu else
** return block comes from decomp
*/
writeback(i == UPDATE ? -1 : 1);
# ifdef xDTM
if(tTf(76, 1))
timtrace(24,0);
# endif
# ifdef xDTR1
if (tTf(50, 1))
{
printf("DECOMP read %s pages,", locv(Accuread));
printf("%s catalog pages,", locv(Accusread));
printf("wrote %s pages\n", locv(Accuwrite));
}
# endif
/* clean decomp */
reinit();
/* return */
}
/*
** STRATEGY
**
** Attempts to limit access scan to less than the entire De.ov_source
** relation by finding a key which can be used for associative
** access to the De.ov_source reln or an index thereon. The key is
** constructed from domain-value specifications found in the
** clauses of the qualification list using sub-routine findsimp
** in findsimp.c and other subroutines in file key.c
*/
int
strategy(void)
{
register int i, allexact;
acc_param_t sourceparm, indexparm;
index_t itup, rtup;
key_t lowikey[MAX_2ND_KEYS+1], highikey[MAX_2ND_KEYS+1];
key_t lowbkey[MAX_2ND_KEYS+1], highbkey[MAX_2ND_KEYS+1];
register desc_t *d;
extern desc_t Inddes;
char *tp;
long l_lid[MAXLID], h_lid[MAXLID];
int keytype;
long page, l, t;
int lidsize;
locator_t tidloc;
keytype = allexact = 0;
#ifdef xOTR1
if (tTf(70, 0))
printf("STRATEGY\tSource=%.12s\tNewq = %d\n",
De.ov_source ? De.ov_source->d_r.r_id : "(none)",
De.de_newq);
#endif
while (De.de_newq) /* if De.de_newq=TRUE then compute a new strategy */
/* NOTE: This while loop is executed only once */ {
De.ov_scanr = De.ov_source;
if (!De.ov_scanr)
return (1); /* return immediately if there is no source relation */
De.ov_fmode = NOKEY; /* assume a find mode with no key */
if (!De.ov_qlist)
break; /* if no qualification then you must scan entire rel */
/*
** Here we check for the special condition
** of a where clause consisting only of a tid.
*/
if (tid_only_test())
return(1);
/* copy structure of source relation into sourceparm */
paramd(De.ov_source, &sourceparm);
/* if source is unkeyed and has no sec index then give up */
if (sourceparm.mode == NOKEY && De.ov_source->d_r.r_indexed <= 0 && !De.ov_source->d_r.r_dim)
break;
/* find all simple clauses if any */
if (!findsimps())
break; /* break if there are no simple clauses */
/* Four steps are now performed to try and find a key.
** First if the relation is hashed then an exact key is search for
**
** Second if there are secondary indices, then a search is made
** for an exact key. If that fails then a check is made for
** a range key. The result of the rangekey check is saved.
**
** A step to check for possible use of Btrees is made here,
** although in actuality, an exact btreekey search is used
** after an exact range key search but before a range key search.
** A BTree range search is used only as a last alternative
** to a no key search.
**
** Third if the relation is an ISAM a check is made for
** an exact key or a range key.
**
** Fourth if there is a secondary index, then if step two
** found a key, that key is used.
**
** Lastly, give up and scan the entire relation
*/
/* step one. Try to find exact key on primary */
if (exactkey(&sourceparm, De.ov_lkey_struct)) {
De.ov_fmode = EXACTKEY;
break;
}
/* step two. If there is an index, try to find an exactkey on one of them */
if (De.ov_source->d_r.r_indexed > 0) {
opencatalog("indices", OR_READ);
ingres_setkey(&Inddes, &itup, De.ov_source->d_r.r_id, IRELIDP);
ingres_setkey(&Inddes, &itup, De.ov_source->d_r.r_owner, IOWNERP);
if ((i = find(&Inddes, EXACTKEY, &De.ov_lotid, &De.ov_hitid, (char *)&itup)) != 0)
syserr("strategy:find indices %d", i);
while (!(i = get(&Inddes, &De.ov_lotid, &De.ov_hitid, (char *)&itup, NXTTUP))) {
#ifdef xOTR1
if (tTf(70, 3))
printup(&Inddes, (char *)&itup);
#endif
if (!bequal(itup.i_relname, De.ov_source->d_r.r_id, MAX_NAME_SIZE) ||
!bequal(itup.i_owner, De.ov_source->d_r.r_owner, 2))
continue;
parami(&itup, &indexparm);
if (exactkey(&indexparm, De.ov_lkey_struct)) {
De.ov_fmode = EXACTKEY;
d = openindex(itup.i_index);
/* temp check for 6.0 index */
if ((int) d->d_r.r_indexed == -1)
ov_err(BADSECINDX);
De.ov_scanr = d;
break;
}
if (De.ov_fmode == LRANGEKEY)
continue; /* a range key on a s.i. has already been found */
if ((allexact = rangekey(&indexparm, lowikey, highikey)) != 0) {
bmove((char *)&itup, (char *)&rtup, sizeof(itup)); /* save tuple */
De.ov_fmode = LRANGEKEY;
}
}
if (i < 0)
syserr("stragery:bad get from index-rel %d", i);
/* If an exactkey on a secondary index was found, look no more. */
if (De.ov_fmode == EXACTKEY)
break;
}
/* attempt to use Btree in aiding search */
if ((i = btreekey(lowbkey, highbkey)) != 0) {
if (i > 0)
De.ov_fmode = BTREEKEY;
else if (De.ov_fmode != LRANGEKEY) {
/* use range key search over btree range search */
keytype = i;
De.ov_fmode = BTREERANGE;
}
}
/* step three. Look for a range key on primary */
if ((i = rangekey(&sourceparm, De.ov_lkey_struct, De.ov_hkey_struct)) != 0) {
if (i < 0)
De.ov_fmode = EXACTKEY;
else if (De.ov_fmode == BTREEKEY) {
/* use exact btree search over range search */
bmove((char *) lowbkey, (char *) De.ov_lkey_struct, sizeof(lowbkey));
bmove((char *) highbkey, (char *) De.ov_hkey_struct, sizeof(highbkey));
}
else
De.ov_fmode = LRANGEKEY;
break;
}
if (De.ov_fmode == BTREEKEY) {
bmove((char *) lowbkey, (char *) De.ov_lkey_struct, sizeof(lowbkey));
bmove((char *) highbkey, (char *) De.ov_hkey_struct, sizeof(highbkey));
break;
}
/* last step. If a secondary index range key was found, use it */
if (De.ov_fmode == LRANGEKEY) {
if (allexact < 0)
De.ov_fmode = EXACTKEY;
d = openindex(rtup.i_index);
/* temp check for 6.0 index */
if ((int) d->d_r.r_indexed == -1)
ov_err(BADSECINDX);
De.ov_scanr = d;
bmove((char *)lowikey, (char *)De.ov_lkey_struct, sizeof(lowikey));
bmove((char *)highikey, (char *)De.ov_hkey_struct, sizeof(highikey));
break;
}
/* nothing will work. give up! */
break;
}
/* check for De.de_newq = FALSE and no source relation */
if (!De.ov_scanr)
return (1);
/*
** At this point the strategy is determined.
**
** If De.ov_fmode is EXACTKEY then De.ov_lkey_struct contains
** the pointers to the keys.
**
** If De.ov_fmode is LRANGEKEY then De.ov_lkey_struct contains
** the pointers to the low keys and De.ov_hkey_struct
** contains pointers to the high keys.
**
** If De.ov_fmode is BTREEKEY then De.ov_lkey_struct contains
** pointers to the key lid.
**
** If De.ov_fmode is BTREERANGE then lowbkey contains pointers
** to the low key lid and highbkey contains pointers to the
** high key lid.
**
** If De.ov_fmode is NOKEY, then a full scan will be performed
*/
#ifdef xOTR1
if (tTf(70, -1))
printf("De.ov_fmode= %d\n",De.ov_fmode);
#endif
if (De.ov_fmode == BTREERANGE) {
/* requires special type of search to limit tid scan */
for (i = 0; i < De.ov_scanr->d_r.r_dim; ++i) {
l_lid[i] = 0;
h_lid[i] = 0;
}
lidsize = LIDSIZE * De.ov_scanr->d_r.r_dim;
/* get low lids */
if (keytype == -1 || keytype == -3) {
tp = De.ov_keyl + De.ov_scanr->d_r.r_width - lidsize;
bmove(l_lid, tp, lidsize);
setallkey(lowbkey, De.ov_keyl);
bmove(tp, l_lid, lidsize);
}
/* get high lids */
if (keytype == -2 || keytype == -3) {
tp = De.ov_keyh + De.ov_scanr->d_r.r_width - lidsize;
bmove(h_lid, tp, lidsize);
setallkey(highbkey, De.ov_keyh);
bmove(tp, h_lid, lidsize);
}
setglobalint(BTREE_FD_NAME, De.ov_scanr->d_btreefd);
/* scan through lids to fill in unprovided lids and to check
** for lids that are too big
*/
page = RT;
for (i = 0; i < De.ov_scanr->d_r.r_dim; ++i) {
if (l_lid[i] <= 0)
l_lid[i] = 1;
l = last_lid(page) - 1;
if (h_lid[i] < 0)
return(0);
if (!h_lid[i] || h_lid[i] > l)
h_lid[i] = l;
if ((t = get_tid(page, h_lid[i], &tidloc)) < 0)
syserr("bad gettid in strategy, lid = %ld\n", h_lid[i]);
page = t;
}
/* check whether lo > hi */
for (i = 0; i < De.ov_scanr->d_r.r_dim; ++i)
if (l_lid[i] < h_lid[i])
break;
else if (l_lid[i] > h_lid[i])
return(0);
#ifdef xOTR1
if (tTf(70,0))
for (i = 0 ; i < De.ov_scanr->d_r.r_dim; ++i)
printf("hi = %ld, lo = %ld\n", h_lid[i], l_lid[i]);
#endif
/* find the smallest and largest possible tids of the lids
** within the provided range */
btreerange(De.ov_scanr, l_lid, h_lid, &De.ov_lotid, &De.ov_hitid);
} else {
/* set up the key tuples */
if (De.ov_fmode != NOKEY) {
if (setallkey(De.ov_lkey_struct, De.ov_keyl))
return (0); /* query false. There is a simple
** clause which can never be satisfied.
** These simple clauses can be choosey!
*/
}
if ((i = find(De.ov_scanr, De.ov_fmode, &De.ov_lotid, &De.ov_hitid, De.ov_keyl)) != 0)
syserr("strategy:find1 %.12s, %d", De.ov_scanr->d_r.r_id, i);
if (De.ov_fmode == LRANGEKEY) {
setallkey(De.ov_hkey_struct, De.ov_keyh);
if ((i = find(De.ov_scanr, HRANGEKEY, &De.ov_lotid, &De.ov_hitid, De.ov_keyh)) != 0)
syserr("strategy:find2 %.12s, %d", De.ov_scanr->d_r.r_id, i);
}
}
#ifdef xOTR1
if (tTf(70, 1)) {
printf("Lo");
dumptid(&De.ov_lotid);
printf("Hi");
dumptid(&De.ov_hitid);
}
#endif
return (1);
}
/*{
** Name: opn_ukey - useable key - can inner node be probed
**
** Description:
**
** Returns TRUE if there are enough attributes
** to use the key of the relation.
**
** The jeqc must be the first element in the ordering that is not
** satisfied by a boolfact. This is because all in order for this
** routine to return true, keys 0..N were present in the join node.
** In opn_sjeqc, we will select the join eqc after reviewing all
** possibilities. One of the joined eqc's will be the first in the
** order list. If we only return true for this one, it will be joined.
** This only matters in the BTREE case. The prnode, in this case is
** also sorted on the first equiv class.
** If we picked an arbitrary eqc as keyed, we may do a needless sort.
**
** Inputs:
** subquery ptr to subquery being analyzed
** oeqcmp available equivalence class map of
** outer node
** jeqc primary attribute's eqc of key
** keyedvar joinop range variable number of
** possibly keyed relation
** primkey TRUE - if jeqc must be first joined
** element of orderlist
**
** Outputs:
** Returns:
** TRUE - if keyed access can be used for join
** Exceptions:
** none
**
** Side Effects:
** none
**
** History:
** 31-may-86 (seputis)
** initial creation
** 10-jun-96 (inkdo01)
** Support for Rtree inners of Kjoins.
[@history_line@]...
*/
bool
opn_ukey(
OPS_SUBQUERY *subquery,
OPE_BMEQCLS *oeqcmp,
OPO_ISORT jeqc,
OPV_IVARS keyedvar,
bool primkey)
{
OPO_STORAGE storage; /* storage structure of relation */
OPV_VARS *varp; /* ptr to range variable element to
** be checked */
i4 ordercount; /* number of attributes that the
** relation is ordered on */
i4 orderindex; /* index into the OPB_MBF structure
** of the range variable element */
OPZ_AT *abase; /* ptr to base of array of ptrs to
** joinop attribute elements */
bool ret_val; /* TRUE is we can do keyed lookup */
/* Relation must be disk resident */
if (keyedvar < 0)
return (FALSE);
ret_val = FALSE;
varp = subquery->ops_vars.opv_base->opv_rt[keyedvar]; /* get ptr to range
** variable element */
storage = varp->opv_tcop->opo_storage; /* get storage structure
** of relation */
abase = subquery->ops_attrs.opz_base; /* ptr to base of array of ptrs to
** joinop attribute elements */
#if 0
/* FIXME - why is this check here */
if ((storage) < 0)
storage = -storage;
#endif
# ifdef xNTR1
if (tTf (1, 0))
{
TRdisplay("Checking for possible keyed lookup into %s.\n", Jn.Range[keyedvar]->xrelid);
TRdisplay("We %s looking for primary join key eqc %d.\n", (primkey ? "are" : "are not"), jeqc);
TRdisplay("The joinop order eqcs are:");
for (i = 0; (att = order[i]) > -1; i++)
TRdisplay("%d ", (i4) Jn.Attnums[att]->equcls);
TRdisplay("\n");
uflush();
}
# endif
/* Each attribute in the ordering must be available from the outer
** or from the boolfacts
*/
ordercount = varp->opv_mbf.opb_count; /* number of attributes that the
** relation is ordered on */
for (orderindex = 0; orderindex < ordercount; orderindex++)
{
OPZ_IATTS attr; /* current ordering attribute being
** analyzed */
OPE_IEQCLS eqcls; /* equivalence class of
** of ordering attribute */
attr = varp->opv_mbf.opb_kbase->opb_keyorder[orderindex].opb_attno;
eqcls = abase->opz_attnums[attr]->opz_equcls;
if (storage == DB_RTRE_STORE) /* special Rtree inner logic */
{
OPB_IBF bfi;
OPB_BOOLFACT *bfp;
for (bfi = 0; bfi < subquery->ops_bfs.opb_bv; bfi++)
if ((bfp = subquery->ops_bfs.opb_base->opb_boolfact[bfi])->
opb_mask & OPB_SPATJ && BTtest((i4)eqcls,
(char *)&bfp->opb_eqcmap))
{
OPE_IEQCLS eqc1;
if ((eqc1 = BTnext((i4)-1, (char *)&bfp->opb_eqcmap,
(i4)subquery->ops_eclass.ope_ev)) == eqcls)
eqc1 = BTnext((i4)eqc1, (char *)&bfp->opb_eqcmap,
(i4)subquery->ops_eclass.ope_ev);
if (BTtest((i4)eqc1, (char *)oeqcmp))
{
eqcls = eqc1;
break; /* kinda silly to let this drop into
** same test again - any alternative will
** be even uglier! */
}
}
}
if (BTtest((i4)eqcls, (char *)oeqcmp) == TRUE)
{
/* Look no further if the first eqcls in the outer
** that exists in the order for the relation is not the
** joining eqcls (if primkey)
*/
if (primkey && (jeqc != eqcls))
{
#ifdef xNTR1
if (tTf(1, 0))
{
TRdisplay("We tried to join on eqcls %d but realized that it\n", eqcls);
TRdisplay("was not the the primary attribute in the ordering and\n");
TRdisplay("that the primary attribute is available from the outer.\n");
uflush();
}
#endif
break;
}
/* Condition satisfied. If non-hash we are keyed */
ret_val = TRUE;
primkey = FALSE;
if (storage != DB_HASH_STORE)
break;
/* we are hashed and need all attrs in the key */
continue;
}
if (subquery->ops_bfs.opb_bfeqc
&&
BTtest((i4)eqcls, (char *)subquery->ops_bfs.opb_bfeqc))
continue; /* check if constant key is
** available for this attribute*/
/* eqcls is not available. If we haven't gotten all
** of the hashed key, we can't use the key.
*/
if (storage == DB_HASH_STORE)
{
# ifdef xNTR1
if (tTf(1, 0))
{
TRdisplay("Not all keys for hashed lookup were found.\n");
uflush();
}
# endif
ret_val = FALSE;
}
break;
}
# ifdef xNTR1
if (tTf(1, 0))
{
if (ret_val == TRUE)
TRdisplay("We can do keyed lookup.\n");
else
TRdisplay("We can NOT do keyed lookup.\n");
uflush();
}
# endif
return (ret_val);
}
update()
{
register int i, mode;
struct descriptor rel;
long oldtid, tupcnt;
char oldtup[MAXTUP], newtup[MAXTUP];
char *batchname();
extern int Dburetflag;
extern struct retcode Dburetcode;
# ifdef xZTR1
if (tTf(15, -1))
printf("Update on %s\n", batchname());
# endif
/* set up to read batchhd */
Batch_cnt = BATCHSIZE; /* force a read on next getbatch */
Batch_dirty = FALSE;
if ((Batch_fp = open(batchname(), 2)) < 0)
syserr("prim:can't open %s", batchname());
getbatch(&Batchhd, sizeof Batchhd);
tupcnt = Batchhd.num_updts;
# ifdef xZTR1
if (tTf(15, 0))
printf("rel=%s tups=%s\n", Batchhd.rel_name, locv(tupcnt));
# endif
Dburetflag = TRUE;
Dburetcode.rc_tupcount = 0;
if (!tupcnt)
{
rmbatch();
return (1);
}
/* update the primary relation */
if (i = openr(&rel, 2, Batchhd.rel_name))
syserr("prim:can't openr %s %d", Batchhd.rel_name, i);
mode = Batchhd.mode_up;
while (tupcnt--)
{
getbatch(&oldtid, Batchhd.tido_size); /* read old tid */
getbatch(oldtup, Batchhd.tupo_size); /* and portions of old tuple */
getbatch(newtup, Batchhd.tupn_size); /* and the newtup */
switch (mode)
{
case mdDEL:
if ((i = delete(&rel, &oldtid)) < 0)
syserr("prim:bad del %d %s", i, Batchhd.rel_name);
break;
case mdREPL:
if (i = replace(&rel, &oldtid, newtup, TRUE))
{
/* if newtuple is a duplicate, then ok */
if (i == 1)
break;
/* if this is recovery and oldtup not there, try to insert newtup */
if (Batch_recovery && i == 2)
goto upinsert;
syserr("prim:Non-functional replace on %s (%d)", i, Batchhd.rel_name);
}
Dburetcode.rc_tupcount++;
break;
case mdAPP:
upinsert:
if ((i = insert(&rel, &oldtid, newtup, TRUE)) < 0)
syserr("prim:bad insert %d %s", i, Batchhd.rel_name);
break;
default:
syserr("prim:impossible mode %d", mode);
}
putbatch(&oldtid, Batchhd.tidn_size); /* write new tid if necessary */
}
/* fix the tupchanged count if delete or append */
if (mode != mdREPL)
Dburetcode.rc_tupcount = rel.reladds >= 0 ? rel.reladds : -rel.reladds;
/* close the relation but secupdate will still use the decriptor */
if (i = closer(&rel))
syserr("prim:close err %d %s", i, Batchhd.rel_name);
batchflush();
/* if this relation is indexed, update the indexes */
if (rel.relindxd > 0)
secupdate(&rel);
rmbatch();
# ifdef xZTR1
if (tTf(15, 2))
printf("%s tups changed\n", locv(Dburetcode.rc_tupcount));
# endif
return (0);
}
void
readinput(register pb_t *ppb)
{
register int i;
resp_t *rp;
/*
** Top Loop.
** Executed once for each complete block read. Normally
** only executed once, but can be more if an error
** block is read.
**
** We mark Qbuf first, so we can free any parameters
** when they are no longer needed (such as when they
** are passed to another process).
*/
Ctx.ctx_pmark = markbuf(Qbuf);
#ifdef xCTR1
if (tTf(10, 0))
lprintf("readinput: mark %d, errfn %x, ppb %x\n", Ctx.ctx_pmark, Ctx.ctx_errfn, ppb);
#endif
rp = getresp();
for (;;) {
/* prime the input (reads first block) */
pb_prime(ppb, PB_NOTYPE);
#ifdef xCTR2
if (tTf(10, 1))
lprintf("readinput: type %d\n", ppb->pb_type);
#endif
/* if this is a response block, return immediately */
if (ppb->pb_type == PB_RESP) {
i = pb_get(ppb, (char *) rp, sizeof(resp_t));
if (i != sizeof(resp_t))
syserr("readinput: resp_t sz %d", i);
/*
read_arg(ppb, &rp->resp_rval);
*/
break;
}
/*
** Parameter Loop.
** Wander through and start reading parameters.
*/
for (Ctx.ctx_pc = 0; Ctx.ctx_pc < PV_MAXPC; Ctx.ctx_pc++) {
if (read_arg(ppb, &Ctx.ctx_pv[Ctx.ctx_pc]) == PV_EOF)
break;
}
/* out of loop, check for vector overflow */
if (Ctx.ctx_pc >= PV_MAXPC)
syserr("readinput: overflow");
/* check for error blocks */
if (ppb->pb_type == PB_ERR) {
proc_err(ppb, Ctx.ctx_pc, Ctx.ctx_pv);
syserr("readinput: proc_err");
}
/* non-error block */
#ifdef xCM_DEBUG
if (ppb->pb_type != PB_REG)
syserr("readinput: pb_type %d", ppb->pb_type);
#endif
Ctx.ctx_resp = ppb->pb_resp;
break;
}
#ifdef xCTR1
if (tTf(10, 4)) {
lprintf("readinput: ");
pb_dump(ppb, FALSE);
}
#endif
}
strategy()
{
register int i, allexact;
struct accessparam sourceparam, indexparam;
struct index itup, rtup;
struct key lowikey[MAXKEYS+1], highikey[MAXKEYS+1];
register struct descriptor *d;
extern struct descriptor Inddes;
struct descriptor *openindex();
# ifdef xOTR1
if (tTf(31, 0))
printf("STRATEGY\tSource=%.12s\tNewq = %d\n", Source ? Source->relid : "(none)", Newq);
# endif
while (Newq) /* if Newq=TRUE then compute a new strategy */
/* NOTE: This while loop is executed only once */
{
Scanr = Source;
if (!Scanr)
return (1); /* return immediately if there is no source relation */
Fmode = NOKEY; /* assume a find mode with no key */
if (!Qlist)
break; /* if no qualification then you must scan entire rel */
/* copy structure of source relation into sourceparam */
paramd(Source, &sourceparam);
/* if source is unkeyed and has no sec index then give up */
if (sourceparam.mode == NOKEY && Source->relindxd <= 0)
break;
/* find all simple clauses if any */
if (!findsimps())
break; /* break if there are no simple clauses */
/* Four steps are now performed to try and find a key.
** First if the relation is hashed then an exact key is search for
**
** Second if there are secondary indexes, then a search is made
** for an exact key. If that fails then a check is made for
** a range key. The result of the rangekey check is saved.
**
** Third if the relation is an ISAM a check is made for
** an exact key or a range key.
**
** Fourth if there is a secondary index, then if step two
** found a key, that key is used.
**
** Lastly, give up and scan the entire relation
*/
/* step one. Try to find exact key on primary */
if (exactkey(&sourceparam, &Lkey_struct))
{
Fmode = EXACTKEY;
break;
}
/* step two. If there is an index, try to find an exactkey on one of them */
if (Source->relindxd)
{
opencatalog("indexes", 0);
setkey(&Inddes, &itup, Source->relid, IRELIDP);
setkey(&Inddes, &itup, Source->relowner, IOWNERP);
if (i = find(&Inddes, EXACTKEY, &Lotid, &Hitid, &itup))
syserr("strategy:find indexes %d", i);
while (!(i = get(&Inddes, &Lotid, &Hitid, &itup, NXTTUP)))
{
# ifdef xOTR1
if (tTf(31, 3))
printup(&Inddes, &itup);
# endif
if (!bequal(itup.irelidp, Source->relid, MAXNAME) ||
!bequal(itup.iownerp, Source->relowner, 2))
continue;
parami(&itup, &indexparam);
if (exactkey(&indexparam, &Lkey_struct))
{
Fmode = EXACTKEY;
d = openindex(itup.irelidi);
/* temp check for 6.0 index */
if (d->relindxd == -1)
ov_err(BADSECINDX);
Scanr = d;
break;
}
if (Fmode == LRANGEKEY)
continue; /* a range key on a s.i. has already been found */
if (allexact = rangekey(&indexparam, &lowikey, &highikey))
{
bmove(&itup, &rtup, sizeof itup); /* save tuple */
Fmode = LRANGEKEY;
}
}
if (i < 0)
syserr("stragery:bad get from index-rel %d", i);
/* If an exactkey on a secondary index was found, look no more. */
if (Fmode == EXACTKEY)
break;
}
/* step three. Look for a range key on primary */
if (i = rangekey(&sourceparam, &Lkey_struct, &Hkey_struct))
{
if (i < 0)
Fmode = EXACTKEY;
else
Fmode = LRANGEKEY;
break;
}
/* last step. If a secondary index range key was found, use it */
if (Fmode == LRANGEKEY)
{
if (allexact < 0)
Fmode = EXACTKEY;
d = openindex(rtup.irelidi);
/* temp check for 6.0 index */
if (d->relindxd == -1)
ov_err(BADSECINDX);
Scanr = d;
bmove(&lowikey, &Lkey_struct, sizeof lowikey);
bmove(&highikey, &Hkey_struct, sizeof highikey);
break;
}
/* nothing will work. give up! */
break;
}
/* check for Newq = FALSE and no source relation */
if (!Scanr)
return (1);
/*
** At this point the strategy is determined.
**
** If Fmode is EXACTKEY then Lkey_struct contains
** the pointers to the keys.
**
** If Fmode is LRANGEKEY then Lkey_struct contains
** the pointers to the low keys and Hkey_struct
** contains pointers to the high keys.
**
** If Fmode is NOKEY, then a full scan will be performed
*/
# ifdef xOTR1
if (tTf(31, -1))
printf("Fmode= %d\n",Fmode);
# endif
/* set up the key tuples */
if (Fmode != NOKEY)
{
if (setallkey(&Lkey_struct, Keyl))
return (0); /* query false. There is a simple
** clause which can never be satisfied.
** These simple clauses can be choosey!
*/
}
if (i = find(Scanr, Fmode, &Lotid, &Hitid, Keyl))
syserr("strategy:find1 %.12s, %d", Scanr->relid, i);
if (Fmode == LRANGEKEY)
{
setallkey(&Hkey_struct, Keyh);
if (i = find(Scanr, HRANGEKEY, &Lotid, &Hitid, Keyh))
syserr("strategy:find2 %.12s, %d", Scanr->relid, i);
}
# ifdef xOTR1
if (tTf(31, 1))
{
printf("Lo");
dumptid(&Lotid);
printf("Hi");
dumptid(&Hitid);
}
# endif
return (1);
}
int
proc_err(pb_t *ppb, int pc, paramv_t *pv)
{
register func_t *f;
register int i;
register ctx_t *ctx;
#ifdef xCTR2
if (tTf(6, 8))
lprintf("proc_err: new = %d\n", Ctx.ctx_new);
#endif
pb_prime(ppb, PB_ERR);
/*
** Scan back on the list of context dependencies.
** If we come to someone who can process this message,
** we go ahead and do it. We also take this
** opportunity to unwind the context list & call the
** cleanup functions.
*/
for (ctx = &Ctx; ctx != NULL; ctx = ctx->ctx_link) {
setprocname(ctx->ctx_name);
f = ctx->ctx_fn;
#ifdef xCTR2
if (tTf(6, 9))
lprintf("proc_err: unwinding %s: errfn=%x, ppb=%x, link=%x, resp=%d, fn=%x\n",
getprocname(), ctx->ctx_errfn, ctx->ctx_ppb,
ctx->ctx_link, ctx->ctx_resp, f);
#endif
/* Do the actual error processing. */
ppb->pb_proc = ctx->ctx_resp;
if (ctx->ctx_errfn != NULL)
i = (*ctx->ctx_errfn)(pc, pv);
else
i = -1;
#ifdef xCTR2
if (tTf(6, 11))
lprintf("proc_err: errcode %d\n", i);
#endif
if (i == 0)
break;
else if (i > 0) {
/* turn into nonfatal error */
ppb->pb_stat |= PB_INFO;
ppb->pb_proc = PB_FRONT;
} else {
/* call the cleanup function */
if (f != NULL && f->fn_active > 0) {
(*f->fn_cleanup)(1);
}
}
/* arrange to leave if parent not in this process */
if (ppb->pb_proc != Cm.cm_myproc) {
send_off(ppb, pc, pv);
pb_flush(ppb);
/* throw away dead contexts and exit */
break;
}
}
if (ctx == NULL) {
syserr("proc_err: no parent");
}
#ifdef xCTR3
MonPpb = getmonppb();
if (tTf(6, 12)) {
lprintf("proc_err: cleanup: ctx=%x, ->_link=%x, MonPpb = ", ctx, ctx->ctx_link);
pb_dump(MonPpb, TRUE);
}
#endif
/* pop contexts down to ctx and exit */
ctx = ctx->ctx_link;
while (Ctx.ctx_link != ctx) {
if (Ctx.ctx_link == NULL)
syserr("proc_err: underflow");
Ctx.ctx_new = TRUE;
resetp();
}
/*
** Flush input pipe.
** THIS CODE IS ONLY NEEDED TO MAKE READMON WORK, AND
** SHOULD BE REMOVED WHEN READMON GOES AWAY!!
*/
if (ctx == NULL) {
Cm.cm_input = Cm.cm_rinput;
MonPpb = getmonppb();
while (!BITISSET(PB_EOF, MonPpb->pb_stat)) {
pb_read(MonPpb);
}
MonPpb->pb_st = PB_UNKNOWN;
}
longjmp(Ctx.ctx_jbuf, 1);
}
int
indexx(int pc, paramv_t *pv)
{
register int i;
int j;
register struct dom *dom;
register paramv_t *p;
char *primary, *indx;
int ndoms, newpc;
struct tup_id tid, hitid;
struct tup_id xtid;
paramv_t newpv[MAX_2ND_KEYS * 2 + 4];
char primtup[MAX_TUP_SIZE], systup[MAX_TUP_SIZE];
desc_t desc, pridesc;
extern desc_t Reldes;
extern desc_t Attdes;
extern desc_t Inddes;
relation_t relkey, reltup;
attr_t attkey, atttup;
index_t indtup;
struct dom domain[MAX_2ND_KEYS];
primary = pv[0].pv_val.pv_str;
indx = pv[1].pv_val.pv_str;
#ifdef xZTR1
if (tTf(33, -1))
printf("index: (pri %s ind %s)\n", primary, indx);
#endif
i = openr(&pridesc, OR_READ, primary);
if (i == AMOPNVIEW_ERR)
return (error(NOINDVIEW, primary, 0));
if (i > 0)
return (error(NOPRIMREL, primary, 0));
if (i < 0)
syserr("INDEX : openr (%.14s) %d", primary, i);
if (!bequal(pridesc.d_r.r_owner, Usercode, USERCODE_SIZE)) {
i = NOTOWNED;
} else if (pridesc.d_r.r_status & S_CATALOG) {
i = NOINDXSYSREL;
} else if (pridesc.d_r.r_indexed == SECINDEX) {
i = ALREADYINDX;
}
if (i) {
closer(&pridesc);
return (error(i, primary, 0));
}
/*
** GATHER INFO. ON DOMAINS
*/
opencatalog("attribute", OR_WRITE);
ingres_setkey(&Attdes, &attkey, primary, ATTRELID);
ingres_setkey(&Attdes, &attkey, pridesc.d_r.r_owner, ATTOWNER);
pc -= 2;
p = &pv[2];
dom = domain;
for (i = 0; i < pc; i++) {
if (i >= MAX_2ND_KEYS) {
closer(&pridesc);
return (error(TOOMUCHDOMS, (p->pv_val).pv_str, primary, 0)); /* too many keys */
}
ingres_setkey(&Attdes, &attkey, (p->pv_val).pv_str, ATTNAME);
j = getequal(&Attdes, &attkey, &atttup, &tid);
if (j < 0)
syserr("INDEX: geteq att %d", j);
if (j) {
closer(&pridesc);
return (error(NODOM, (p->pv_val).pv_str, 0)); /* key not in relation */
}
if (pridesc.d_r.r_dim > 0 && atttup.a_id == pridesc.d_r.r_attrc) {
/* attempting to use lid field as part of index */
closer(&pridesc);
return(error(NOINDXLID, primary, (p->pv_val).pv_str, 0));
}
dom->id = atttup.a_id;
dom->off = atttup.a_off;
dom->frml = atttup.a_len & I1MASK;
dom->frm[0] = atttup.a_fmt;
p++;
dom++;
}
ndoms = i;
noclose(&Attdes);
/*
** The "order" of the steps have been altered to improve
** recovery possibilities
*/
/*
** STEP 1 & 2: CREATE INDEX RELATION.
*/
newpv[0].pv_val.pv_str = "0202";
newpv[1].pv_val.pv_str = indx;
newpc = 2;
p = &pv[2];
dom = domain;
for (i = 0; i < pc; i++) {
newpv[newpc++].pv_val.pv_str = (p->pv_val).pv_str;
itoa(dom->frml, &dom->frm[1]);
newpv[newpc++].pv_val.pv_str = dom->frm;
dom++;
p++;
}
newpv[newpc++].pv_val.pv_str = "tidp";
newpv[newpc++].pv_val.pv_str = "i4";
newpv[newpc].pv_type = PV_EOF;
if (create(newpc, newpv)) {
closer(&pridesc);
return (-1);
}
/* This is done for concurrency reasons */
if (noclose(&Reldes))
syserr("index: noclose");
/*
** STEP 5: FILL UP THE SECONDARY INDEX FILE ITSELF
*/
if (Lockrel) {
/* set a shared relation lock */
setrll(A_SLP, &pridesc.d_tid, M_SHARE);
}
if ((i = openr(&desc, OR_WRITE, indx)) != 0)
syserr("INDEX: openr %.14s %d", indx, i);
find(&pridesc, NOKEY, &tid, &hitid, (void *) NULL);
while ((i = get(&pridesc, &tid, &hitid, primtup, TRUE)) == 0) {
dom = domain;
for (i = j = 0; j < ndoms; j++) {
#ifdef BIG_ENDIAN
if (dom->frm[0] != 'c')
i = ((i-1)|(dom->frml-1))+1;
#endif
bmove(&primtup[dom->off], &systup[i], dom->frml);
i += dom->frml;
dom++;
}
#ifdef BIG_ENDIAN
i = ((i-1)|3)+1;
#endif
/* move in pointer */
bmove(&tid, &systup[i], sizeof(tid));
if ((j = insert(&desc, &xtid, systup, TRUE)) < 0) {
syserr("INDEX: insert %.14s %d", indx, j);
}
}
if (i < 0) {
syserr("INDEX: get %.14s %d", primary, i);
}
closer(&pridesc);
closer(&desc);
/*
** STEP 3: ENTRIES TO INDEX-REL
*/
/* mv in primary name */
pmove(primary, indtup.i_relname, MAX_NAME_SIZE, ' ');
/* primary owner */
bmove(pridesc.d_r.r_owner, indtup.i_owner, sizeof(pridesc.d_r.r_owner));
/* index name */
pmove(indx, indtup.i_index, MAX_NAME_SIZE, ' ');
indtup.i_indrelspec = M_HEAP;
for (i = 0; i < MAX_2ND_KEYS; i++) {
indtup.i_dom[i] = (i < ndoms) ? domain[i].id : 0;
}
opencatalog("indices", OR_WRITE);
if ((i = insert(&Inddes, &tid, (char *) &indtup, TRUE)) < 0)
syserr("INDEX: insert ix %d", i);
/*
** STEP 4: TURN BIT ON IN PRIMARY RELATION TO SHOW IT IS BEING INDEXED
*/
opencatalog("relation", OR_WRITE);
ingres_setkey(&Reldes, &relkey, primary, RELID);
ingres_setkey(&Reldes, &relkey, pridesc.d_r.r_owner, RELOWNER);
if ((i = getequal(&Reldes, &relkey, &reltup, &tid)) != 0)
syserr("INDEX: geteq rel %d", i);
reltup.r_indexed = SECBASE;
if ((i = replace(&Reldes, &tid, &reltup, TRUE)) < 0)
syserr("INDEX: replace rel %d", i);
if (Lockrel)
unlrl(&pridesc.d_tid); /* release relation lock */
return (0);
}