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mariadb/storage/connect/blkfil.cpp
Mikhail Chalov 19af1890b5 Use memory safe snprintf() in Connect Engine 
This commit replaces sprintf(buf, ...) with
snprintf(buf, sizeof(buf), ...),
specifically in the "easy" cases where buf is allocated with a size
known at compile time.

The changes make sure we are not write outside array/string bounds which
will lead to undefined behaviour. In case the code is trying to write
outside bounds - safe version of functions simply cut the string
messages so we process this gracefully.

All new code of the whole pull request, including one or several files
that are either new files or modified ones, are contributed under the BSD-new
license.  I am contributing on behalf of my employer Amazon Web Services,
Inc.

bsonudf.cpp warnings cleanup by Daniel Black

Reviewer: Daniel Black
2022-07-26 16:28:59 +10:00

1075 lines
35 KiB
C++
Raw Blame History

/************* BlkFil C++ Program Source Code File (.CPP) **************/
/* PROGRAM NAME: BLKFIL */
/* ------------- */
/* Version 2.6 */
/* */
/* COPYRIGHT: */
/* ---------- */
/* (C) Copyright to the author Olivier BERTRAND 2004-2017 */
/* */
/* WHAT THIS PROGRAM DOES: */
/* ----------------------- */
/* This program is the implementation of block indexing classes. */
/* */
/***********************************************************************/
/***********************************************************************/
/* Include relevant MariaDB header file. */
/***********************************************************************/
#include "my_global.h"
#include "sql_class.h"
//#include "sql_time.h"
#if defined(_WIN32)
//#include <windows.h>
#else // !_WIN32
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#endif // !_WIN32
/***********************************************************************/
/* Include application header files: */
/***********************************************************************/
#include "global.h" // global declarations
#include "plgdbsem.h" // DB application declarations
#include "xindex.h" // Key Index class declarations
#include "filamtxt.h" // File access method dcls
#include "tabdos.h" // TDBDOS and DOSCOL class dcls
#include "array.h" // ARRAY classes dcls
#include "blkfil.h" // Block Filter classes dcls
/* ------------------------ Class BLOCKFILTER ------------------------ */
/***********************************************************************/
/* BLOCKFILTER constructor. */
/***********************************************************************/
BLOCKFILTER::BLOCKFILTER(PTDBDOS tdbp, int op)
{
Tdbp = tdbp;
Correl = FALSE;
Opc = op;
Opm = 0;
Result = 0;
} // end of BLOCKFILTER constructor
/***********************************************************************/
/* Make file output of BLOCKFILTER contents. */
/***********************************************************************/
void BLOCKFILTER::Printf(PGLOBAL, FILE *f, uint n)
{
char m[64];
memset(m, ' ', n); // Make margin string
m[n] = '\0';
fprintf(f, "%sBLOCKFILTER: at %p opc=%d opm=%d result=%d\n",
m, this, Opc, Opm, Result);
} // end of Printf
/***********************************************************************/
/* Make string output of BLOCKFILTER contents. */
/***********************************************************************/
void BLOCKFILTER::Prints(PGLOBAL, char *ps, uint z)
{
strncat(ps, "BlockFilter(s)", z);
} // end of Prints
/* ---------------------- Class BLKFILLOG ---------------------------- */
/***********************************************************************/
/* BLKFILLOG constructor. */
/***********************************************************************/
BLKFILLOG::BLKFILLOG(PTDBDOS tdbp, int op, PBF *bfp, int n)
: BLOCKFILTER(tdbp, op)
{
N = n;
Fil = bfp;
for (int i = 0; i < N; i++)
if (Fil[i])
Correl |= Fil[i]->Correl;
} // end of BLKFILLOG constructor
/***********************************************************************/
/* Reset: this function is used only to check the existence of a */
/* BLKFILIN block and have it reset its Bot value for sorted columns. */
/***********************************************************************/
void BLKFILLOG::Reset(PGLOBAL g)
{
for (int i = 0; i < N; i++)
if (Fil[i])
Fil[i]->Reset(g);
} // end of Reset
/***********************************************************************/
/* This function is used for block filter evaluation. We use here a */
/* fuzzy logic between the values returned by evaluation blocks: */
/* -2: the condition will be always false for the rest of the file. */
/* -1: the condition will be false for the whole group. */
/* 0: the condition may be true for some of the group values. */
/* 1: the condition will be true for the whole group. */
/* 2: the condition will be always true for the rest of the file. */
/***********************************************************************/
int BLKFILLOG::BlockEval(PGLOBAL g)
{
int i, rc;
for (i = 0; i < N; i++) {
// 0: Means some block filter value may be True
rc = (Fil[i]) ? Fil[i]->BlockEval(g) : 0;
if (!i)
Result = (Opc == OP_NOT) ? -rc : rc;
else switch (Opc) {
case OP_AND:
Result = MY_MIN(Result, rc);
break;
case OP_OR:
Result = MY_MAX(Result, rc);
break;
default:
// Should never happen
Result = 0;
return Result;
} // endswitch Opc
} // endfor i
return Result;
} // end of BlockEval
/* ---------------------- Class BLKFILARI----------------------------- */
/***********************************************************************/
/* BLKFILARI constructor. */
/***********************************************************************/
BLKFILARI::BLKFILARI(PGLOBAL g, PTDBDOS tdbp, int op, PXOB *xp)
: BLOCKFILTER(tdbp, op)
{
Colp = (PDOSCOL)xp[0];
if (xp[1]->GetType() == TYPE_COLBLK) {
Cpx = (PCOL)xp[1]; // Subquery pseudo constant column
Correl = TRUE;
} else
Cpx = NULL;
Sorted = Colp->IsSorted() > 0;
// Don't remember why this was changed. Anyway it is no good for
// correlated subqueries because the Value must reflect changes
if (Cpx)
Valp = xp[1]->GetValue();
else
Valp = AllocateValue(g, xp[1]->GetValue());
} // end of BLKFILARI constructor
/***********************************************************************/
/* Reset: re-eval the constant value in the case of pseudo constant */
/* column use in a correlated subquery. */
/***********************************************************************/
void BLKFILARI::Reset(PGLOBAL g)
{
if (Cpx) {
Cpx->Reset();
Cpx->Eval(g);
MakeValueBitmap(); // Does nothing for class BLKFILARI
} // endif Cpx
} // end of Reset
/***********************************************************************/
/* Evaluate block filter for arithmetic operators. */
/***********************************************************************/
int BLKFILARI::BlockEval(PGLOBAL)
{
int mincmp, maxcmp, n;
#if defined(_DEBUG)
assert (Colp->IsClustered());
#endif
n = ((PTDBDOS)Colp->GetTo_Tdb())->GetCurBlk();
mincmp = Colp->GetMin()->CompVal(Valp, n);
maxcmp = Colp->GetMax()->CompVal(Valp, n);
switch (Opc) {
case OP_EQ:
case OP_NE:
if (mincmp < 0) // Means minval > Val
Result = (Sorted) ? -2 : -1;
else if (maxcmp > 0) // Means maxval < Val
Result = -1;
else if (!mincmp && !maxcmp) // minval = maxval = val
Result = 1;
else
Result = 0;
break;
case OP_GT:
case OP_LE:
if (mincmp < 0) // minval > Val
Result = (Sorted) ? 2 : 1;
else if (maxcmp < 0) // maxval > Val
Result = 0;
else // maxval <= Val
Result = -1;
break;
case OP_GE:
case OP_LT:
if (mincmp <= 0) // minval >= Val
Result = (Sorted) ? 2 : 1;
else if (maxcmp <= 0) // Maxval >= Val
Result = 0;
else // Maxval < Val
Result = -1;
break;
} // endswitch Opc
switch (Opc) {
case OP_NE:
case OP_LE:
case OP_LT:
Result = -Result;
break;
} // endswitch Opc
if (trace(1))
htrc("BlockEval: op=%d n=%d rc=%d\n", Opc, n, Result);
return Result;
} // end of BlockEval
/* ---------------------- Class BLKFILAR2----------------------------- */
/***********************************************************************/
/* BLKFILAR2 constructor. */
/***********************************************************************/
BLKFILAR2::BLKFILAR2(PGLOBAL g, PTDBDOS tdbp, int op, PXOB *xp)
: BLKFILARI(g, tdbp, op, xp)
{
MakeValueBitmap();
} // end of BLKFILAR2 constructor
/***********************************************************************/
/* MakeValueBitmap: Set the constant value bit map. It can be void */
/* if the constant value is not in the column distinct values list. */
/***********************************************************************/
void BLKFILAR2::MakeValueBitmap(void)
{
int i; // ndv = Colp->GetNdv();
bool found = FALSE;
PVBLK dval = Colp->GetDval();
assert(dval);
/*********************************************************************/
/* Here we cannot use Find because we must get the index */
/* of where to put the value if it is not found in the array. */
/* This is needed by operators other than OP_EQ or OP_NE. */
/*********************************************************************/
found = dval->Locate(Valp, i);
/*********************************************************************/
/* Set the constant value bitmap. The bitmaps are really matching */
/* the OP_EQ, OP_LE, and OP_LT operator but are also used for the */
/* other operators for which the Result will be inverted. */
/* The reason the bitmaps are not directly complemented for them is */
/* to be able to test easily the cases of sorted columns with Bxp, */
/* and the case of a void bitmap, which happens if the constant */
/* value is not in the column distinct values list. */
/*********************************************************************/
if (found) {
Bmp = 1 << i; // Bit of the found value
Bxp = Bmp - 1; // All smaller values
if (Opc != OP_LT && Opc != OP_GE)
Bxp |= Bmp; // Found value must be included
} else {
Bmp = 0;
Bxp = (1 << i) - 1;
} // endif found
if (!(Opc == OP_EQ || Opc == OP_NE))
Bmp = Bxp;
} // end of MakeValueBitmap
/***********************************************************************/
/* Evaluate XDB2 block filter for arithmetic operators. */
/***********************************************************************/
int BLKFILAR2::BlockEval(PGLOBAL)
{
#if defined(_DEBUG)
assert (Colp->IsClustered());
#endif
int n = ((PTDBDOS)Colp->GetTo_Tdb())->GetCurBlk();
uint bkmp = *(uint*)Colp->GetBmap()->GetValPtr(n);
uint bres = Bmp & bkmp;
// Set result as if Opc were OP_EQ, OP_LT, or OP_LE
if (!bres) {
if (!Bmp)
Result = -2; // No good block in the table file
else if (!Sorted)
Result = -1; // No good values in this block
else // Sorted column, test for no more good blocks in file
Result = (Bxp & bkmp) ? -1 : -2;
} else
// Test whether all block values are good or only some ones
Result = (bres == bkmp) ? 1 : 0;
// For OP_NE, OP_GE, and OP_GT the result must be inverted.
switch (Opc) {
case OP_NE:
case OP_GE:
case OP_GT:
Result = -Result;
break;
} // endswitch Opc
if (trace(1))
htrc("BlockEval2: op=%d n=%d rc=%d\n", Opc, n, Result);
return Result;
} // end of BlockEval
/* ---------------------- Class BLKFILMR2----------------------------- */
/***********************************************************************/
/* BLKFILMR2 constructor. */
/***********************************************************************/
BLKFILMR2::BLKFILMR2(PGLOBAL g, PTDBDOS tdbp, int op, PXOB *xp)
: BLKFILARI(g, tdbp, op, xp)
{
Nbm = Colp->GetNbm();
Bmp = (uint*)PlugSubAlloc(g, NULL, Nbm * sizeof(uint));
Bxp = (uint*)PlugSubAlloc(g, NULL, Nbm * sizeof(uint));
MakeValueBitmap();
} // end of BLKFILMR2 constructor
/***********************************************************************/
/* MakeValueBitmap: Set the constant value bit map. It can be void */
/* if the constant value is not in the column distinct values list. */
/***********************************************************************/
void BLKFILMR2::MakeValueBitmap(void)
{
int i; // ndv = Colp->GetNdv();
bool found = FALSE, noteq = !(Opc == OP_EQ || Opc == OP_NE);
PVBLK dval = Colp->GetDval();
assert(dval);
for (i = 0; i < Nbm; i++)
Bmp[i] = Bxp[i] = 0;
/*********************************************************************/
/* Here we cannot use Find because we must get the index */
/* of where to put the value if it is not found in the array. */
/* This is needed by operators other than OP_EQ or OP_NE. */
/*********************************************************************/
found = dval->Locate(Valp, i);
/*********************************************************************/
/* For bitmaps larger than a ULONG, we must know where Bmp and Bxp */
/* are positioned in the ULONG bit map block array. */
/*********************************************************************/
N = i / MAXBMP;
i %= MAXBMP;
/*********************************************************************/
/* Set the constant value bitmaps. The bitmaps are really matching */
/* the OP_EQ, OP_LE, and OP_LT operator but are also used for the */
/* other operators for which the Result will be inverted. */
/* The reason the bitmaps are not directly complemented for them is */
/* to be able to easily test the cases of sorted columns with Bxp, */
/* and the case of a void bitmap, which happens if the constant */
/* value is not in the column distinct values list. */
/*********************************************************************/
if (found) {
Bmp[N] = 1 << i;
Bxp[N] = Bmp[N] - 1;
if (Opc != OP_LT && Opc != OP_GE)
Bxp[N] |= Bmp[N]; // Found value must be included
} else
Bxp[N] = (1 << i) - 1;
if (noteq)
Bmp[N] = Bxp[N];
Void = !Bmp[N]; // There are no good values in the file
for (i = 0; i < N; i++) {
Bxp[i] = ~0;
if (noteq)
Bmp[i] = Bxp[i];
Void = Void && !Bmp[i];
} // endfor i
if (!Bmp[N] && !Bxp[N])
N--;
} // end of MakeValueBitmap
/***********************************************************************/
/* Evaluate XDB2 block filter for arithmetic operators. */
/***********************************************************************/
int BLKFILMR2::BlockEval(PGLOBAL)
{
#if defined(_DEBUG)
assert (Colp->IsClustered());
#endif
int i, n = ((PTDBDOS)Colp->GetTo_Tdb())->GetCurBlk();
bool fnd = FALSE, all = TRUE, gt = TRUE;
uint bres;
uint *bkmp = (uint*)Colp->GetBmap()->GetValPtr(n * Nbm);
// Set result as if Opc were OP_EQ, OP_LT, or OP_LE
for (i = 0; i < Nbm; i++)
if (i <= N) {
if ((bres = Bmp[i] & bkmp[i]))
fnd = TRUE; // Some good value(s) found in the block
if (bres != bkmp[i])
all = FALSE; // Not all block values are good
if (Bxp[i] & bkmp[i])
gt = FALSE; // Not all block values are > good value(s)
} else if (bkmp[i]) {
all = FALSE;
break;
} // endif's
if (!fnd) {
if (Void || (gt && Sorted))
Result = -2; // No (more) good block in file
else
Result = -1; // No good values in this block
} else
Result = (all) ? 1 : 0; // All block values are good
// For OP_NE, OP_GE, and OP_GT the result must be inverted.
switch (Opc) {
case OP_NE:
case OP_GE:
case OP_GT:
Result = -Result;
break;
} // endswitch Opc
if (trace(1))
htrc("BlockEval2: op=%d n=%d rc=%d\n", Opc, n, Result);
return Result;
} // end of BlockEval
/***********************************************************************/
/* BLKSPCARI constructor. */
/***********************************************************************/
BLKSPCARI::BLKSPCARI(PTDBDOS tdbp, int op, PXOB *xp, int bsize)
: BLOCKFILTER(tdbp, op)
{
if (xp[1]->GetType() == TYPE_COLBLK) {
Cpx = (PCOL)xp[1]; // Subquery pseudo constant column
Correl = TRUE;
} else
Cpx = NULL;
Valp = xp[1]->GetValue();
Val = (int)xp[1]->GetValue()->GetIntValue();
Bsize = bsize;
} // end of BLKFILARI constructor
/***********************************************************************/
/* Reset: re-eval the constant value in the case of pseudo constant */
/* column use in a correlated subquery. */
/***********************************************************************/
void BLKSPCARI::Reset(PGLOBAL g)
{
if (Cpx) {
Cpx->Reset();
Cpx->Eval(g);
Val = (int)Valp->GetIntValue();
} // endif Cpx
} // end of Reset
/***********************************************************************/
/* Evaluate block filter for arithmetic operators (ROWID) */
/***********************************************************************/
int BLKSPCARI::BlockEval(PGLOBAL)
{
int mincmp, maxcmp, n, m;
n = Tdbp->GetCurBlk();
m = n * Bsize + 1; // Minimum Rowid value for this block
mincmp = (Val > m) ? 1 : (Val < m) ? (-1) : 0;
m = (n + 1) * Bsize; // Maximum Rowid value for this block
maxcmp = (Val > m) ? 1 : (Val < m) ? (-1) : 0;
switch (Opc) {
case OP_EQ:
case OP_NE:
if (mincmp < 0) // Means minval > Val
Result = -2; // Always sorted
else if (maxcmp > 0) // Means maxval < Val
Result = -1;
else if (!mincmp && !maxcmp) // minval = maxval = val
Result = 1;
else
Result = 0;
break;
case OP_GT:
case OP_LE:
if (mincmp < 0) // minval > Val
Result = 2; // Always sorted
else if (maxcmp < 0) // maxval > Val
Result = 0;
else // maxval <= Val
Result = -1;
break;
case OP_GE:
case OP_LT:
if (mincmp <= 0) // minval >= Val
Result = 2; // Always sorted
else if (maxcmp <= 0) // Maxval >= Val
Result = 0;
else // Maxval < Val
Result = -1;
break;
} // endswitch Opc
switch (Opc) {
case OP_NE:
case OP_LE:
case OP_LT:
Result = -Result;
break;
} // endswitch Opc
if (trace(1))
htrc("BlockEval: op=%d n=%d rc=%d\n", Opc, n, Result);
return Result;
} // end of BlockEval
/* ------------------------ Class BLKFILIN --------------------------- */
/***********************************************************************/
/* BLKFILIN constructor. */
/***********************************************************************/
BLKFILIN::BLKFILIN(PGLOBAL g, PTDBDOS tdbp, int op, int opm, PXOB *xp)
: BLOCKFILTER(tdbp, op)
{
if (op == OP_IN) {
Opc = OP_EQ;
Opm = 1;
} else {
Opc = op;
Opm = opm;
} // endif op
Colp = (PDOSCOL)xp[0];
Arap = (PARRAY)xp[1];
Type = Arap->GetResultType();
if (Colp->GetResultType() != Type) {
snprintf(g->Message, sizeof(g->Message), "BLKFILIN: %s", MSG(VALTYPE_NOMATCH));
throw g->Message;
} else if (Colp->GetValue()->IsCi())
Arap->SetPrecision(g, 1); // Case insensitive
Sorted = Colp->IsSorted() > 0;
} // end of BLKFILIN constructor
/***********************************************************************/
/* Reset: have the sorted array reset its Bot value to -1 (bottom). */
/***********************************************************************/
void BLKFILIN::Reset(PGLOBAL)
{
Arap->Reset();
// MakeValueBitmap(); // Does nothing for class BLKFILIN
} // end of Reset
/***********************************************************************/
/* Evaluate block filter for a IN operator on a constant array. */
/* Note: here we need to use the GetValPtrEx function to get a zero */
/* ended string in case of string argument. This is because the ARRAY */
/* can have a different width than the char column. */
/***********************************************************************/
int BLKFILIN::BlockEval(PGLOBAL g)
{
int n = ((PTDBDOS)Colp->GetTo_Tdb())->GetCurBlk();
void *minp = Colp->GetMin()->GetValPtrEx(n);
void *maxp = Colp->GetMax()->GetValPtrEx(n);
Result = Arap->BlockTest(g, Opc, Opm, minp, maxp, Sorted);
return Result;
} // end of BlockEval
/* ------------------------ Class BLKFILIN2 -------------------------- */
/***********************************************************************/
/* BLKFILIN2 constructor. */
/* New version that takes care of all operators and modificators. */
/* It is also ready to handle the case of correlated sub-selects. */
/***********************************************************************/
BLKFILIN2::BLKFILIN2(PGLOBAL g, PTDBDOS tdbp, int op, int opm, PXOB *xp)
: BLKFILIN(g, tdbp, op, opm, xp)
{
Nbm = Colp->GetNbm();
Valp = AllocateValue(g, Colp->GetValue());
Invert = (Opc == OP_NE || Opc == OP_GE || Opc ==OP_GT);
Bmp = (uint*)PlugSubAlloc(g, NULL, Nbm * sizeof(uint));
Bxp = (uint*)PlugSubAlloc(g, NULL, Nbm * sizeof(uint));
MakeValueBitmap();
} // end of BLKFILIN2 constructor
/***********************************************************************/
/* MakeValueBitmap: Set the constant values bit map. It can be void */
/* if the constant values are not in the column distinct values list. */
/* The bitmaps are prepared for the EQ, LE, and LT operators and */
/* takes care of the ALL and ANY modificators. If the operators are */
/* NE, GE, or GT the modificator is inverted and the result will be. */
/***********************************************************************/
void BLKFILIN2::MakeValueBitmap(void)
{
int i, k, n, ndv = Colp->GetNdv();
bool found, noteq = !(Opc == OP_EQ || Opc == OP_NE);
bool all = (!Invert) ? (Opm == 2) : (Opm != 2);
uint btp;
PVBLK dval = Colp->GetDval();
N = -1;
// Take care of special cases
if (!(n = Arap->GetNval())) {
// Return TRUE for ALL because it means that there are no item that
// does not verify the condition, which is true indeed.
// Return FALSE for ANY because TRUE means that there is at least
// one item that verifies the condition, which is false.
Result = (Opm == 2) ? 2 : -2;
return;
} else if (!noteq && all && n > 1) {
// An item cannot be equal to all different values
// or an item is always unequal to any different values
Result = (Opc == OP_EQ) ? -2 : 2;
return;
} // endif's
for (i = 0; i < Nbm; i++)
Bmp[i] = Bxp[i] = 0;
for (k = 0; k < n; k++) {
Arap->GetNthValue(Valp, k);
found = dval->Locate(Valp, i);
N = i / MAXBMP;
btp = 1 << (i % MAXBMP);
if (found)
Bmp[N] |= btp;
// For LT and LE if ALL the condition applies to the smallest item
// if ANY it applies to the largest item. In the case of EQ we come
// here only if ANY or if n == 1, so it does applies to the largest.
if ((!k && all) || (k == n - 1 && !all)) {
Bxp[N] = btp - 1;
if (found && Opc != OP_LT && Opc != OP_GE)
Bxp[N] |= btp; // Found value must be included
} // endif k, opm
} // endfor k
if (noteq)
Bmp[N] = Bxp[N];
Void = !Bmp[N]; // There are no good values in the file
for (i = 0; i < N; i++) {
Bxp[i] = ~0;
if (noteq) {
Bmp[i] = Bxp[i];
Void = FALSE;
} // endif noteq
} // endfor i
if (!Bmp[N] && !Bxp[N]) {
if (--N < 0)
// All array values are smaller than block values
Result = (Invert) ? 2 : -2;
} else if (N == Nbm - 1 && (signed)Bmp[N] == (1 << (ndv % MAXBMP)) - 1) {
// Condition will be always TRUE or FALSE for the whole file
Result = (Invert) ? -2 : 2;
N = -1;
} // endif's
} // end of MakeValueBitmap
/***********************************************************************/
/* Evaluate block filter for set operators on a constant array. */
/* Note: here we need to use the GetValPtrEx function to get a zero */
/* ended string in case of string argument. This is because the ARRAY */
/* can have a different width than the char column. */
/***********************************************************************/
int BLKFILIN2::BlockEval(PGLOBAL)
{
if (N < 0)
return Result; // Was set in MakeValueBitmap
int i, n = ((PTDBDOS)Colp->GetTo_Tdb())->GetCurBlk();
bool fnd = FALSE, all = TRUE, gt = TRUE;
uint bres;
uint *bkmp = (uint*)Colp->GetBmap()->GetValPtr(n * Nbm);
// Set result as if Opc were OP_EQ, OP_LT, or OP_LE
// The difference between ALL or ANY was handled in MakeValueBitmap
for (i = 0; i < Nbm; i++)
if (i <= N) {
if ((bres = Bmp[i] & bkmp[i]))
fnd = TRUE;
if (bres != bkmp[i])
all = FALSE;
if (Bxp[i] & bkmp[i])
gt = FALSE;
} else if (bkmp[i]) {
all = FALSE;
break;
} // endif's
if (!fnd) {
if (Void || (Sorted && gt))
Result = -2; // No more good block in file
else
Result = -1; // No good values in this block
} else if (all)
Result = 1; // All block values are good
else
Result = 0; // Block contains some good values
// For OP_NE, OP_GE, and OP_GT the result must be inverted.
switch (Opc) {
case OP_NE:
case OP_GE:
case OP_GT:
Result = -Result;
break;
} // endswitch Opc
return Result;
} // end of BlockEval
#if 0
/***********************************************************************/
/* BLKFILIN2 constructor. */
/***********************************************************************/
BLKFILIN2::BLKFILIN2(PGLOBAL g, PTDBDOS tdbp, int op, int opm, PXOB *xp)
: BLKFILIN(g, tdbp, op, opm, xp)
{
// Currently, bitmap matching is only implemented for the IN operator
if (!(Bitmap = (op == OP_IN || (op == OP_EQ && opm != 2)))) {
Nbm = Colp->GetNbm();
N = 0;
return; // Revert to standard minmax method
} // endif minmax
int i, n;
ULONG btp;
PVAL valp = AllocateValue(g, Colp->GetValue());
PVBLK dval = Colp->GetDval();
Nbm = Colp->GetNbm();
N = -1;
Bmp = (PULONG)PlugSubAlloc(g, NULL, Nbm * sizeof(ULONG));
Bxp = (PULONG)PlugSubAlloc(g, NULL, Nbm * sizeof(ULONG));
for (i = 0; i < Nbm; i++)
Bmp[i] = Bxp[i] = 0;
for (n = 0; n < Arap->GetNval(); n++) {
Arap->GetNthValue(valp, n);
if ((i = dval->Find(valp)) >= 0)
Bmp[i / MAXBMP] |= 1 << (i % MAXBMP);
} // endfor n
for (i = Nbm - 1; i >= 0; i--)
if (Bmp[i]) {
for (btp = Bmp[i]; btp; btp >>= 1)
Bxp[i] |= btp;
for (N = i--; i >= 0; i--)
Bxp[i] = ~0;
break;
} // endif Bmp
} // end of BLKFILIN2 constructor
/***********************************************************************/
/* Evaluate block filter for a IN operator on a constant array. */
/* Note: here we need to use the GetValPtrEx function to get a zero */
/* ended string in case of string argument. This is because the ARRAY */
/* can have a different width than the char column. */
/***********************************************************************/
int BLKFILIN2::BlockEval(PGLOBAL g)
{
if (N < 0)
return -2; // IN list contains no good values
int i, n = ((PTDBDOS)Colp->GetTo_Tdb())->GetCurBlk();
bool fnd = FALSE, all = TRUE, gt = TRUE;
ULONG bres;
PULONG bkmp = (PULONG)Colp->GetBmap()->GetValPtr(n * Nbm);
if (Bitmap) {
// For IN operator use the bitmap method
for (i = 0; i < Nbm; i++)
if (i <= N) {
if ((bres = Bmp[i] & bkmp[i]))
fnd = TRUE;
if (bres != bkmp[i])
all = FALSE;
if (Bxp[i] & bkmp[i])
gt = FALSE;
} else if (bkmp[i]) {
all = FALSE;
break;
} // endif's
if (!fnd) {
if (Sorted && gt)
Result = -2; // No more good block in file
else
Result = -1; // No good values in this block
} else if (all)
Result = 1; // All block values are good
else
Result = 0; // Block contains some good values
} else {
// For other than IN operators, revert to standard minmax method
int n = 0, ndv = Colp->GetNdv();
void *minp = NULL;
void *maxp = NULL;
ULONG btp;
PVBLK dval = Colp->GetDval();
for (i = 0; i < Nbm; i++)
for (btp = 1; btp && n < ndv; btp <<= 1, n++)
if (btp & bkmp[i]) {
if (!minp)
minp = dval->GetValPtrEx(n);
maxp = dval->GetValPtrEx(n);
} // endif btp
Result = Arap->BlockTest(g, Opc, Opm, minp, maxp, Colp->IsSorted());
} // endif Bitmap
return Result;
} // end of BlockEval
#endif // 0
/* ------------------------ Class BLKSPCIN --------------------------- */
/***********************************************************************/
/* BLKSPCIN constructor. */
/***********************************************************************/
BLKSPCIN::BLKSPCIN(PGLOBAL, PTDBDOS tdbp, int op, int opm,
PXOB *xp, int bsize)
: BLOCKFILTER(tdbp, op)
{
if (op == OP_IN) {
Opc = OP_EQ;
Opm = 1;
} else
Opm = opm;
Arap = (PARRAY)xp[1];
#if defined(_DEBUG)
assert (Opm);
assert (Arap->GetResultType() == TYPE_INT);
#endif
Bsize = bsize;
} // end of BLKSPCIN constructor
/***********************************************************************/
/* Reset: have the sorted array reset its Bot value to -1 (bottom). */
/***********************************************************************/
void BLKSPCIN::Reset(PGLOBAL)
{
Arap->Reset();
} // end of Reset
/***********************************************************************/
/* Evaluate block filter for a IN operator on a constant array. */
/***********************************************************************/
int BLKSPCIN::BlockEval(PGLOBAL g)
{
int n = Tdbp->GetCurBlk();
int minrow = n * Bsize + 1; // Minimum Rowid value for this block
int maxrow = (n + 1) * Bsize; // Maximum Rowid value for this block
Result = Arap->BlockTest(g, Opc, Opm, &minrow, &maxrow, TRUE);
return Result;
} // end of BlockEval
/* ------------------------------------------------------------------- */
#if 0
/***********************************************************************/
/* Implementation of the BLOCKINDEX class. */
/***********************************************************************/
BLOCKINDEX::BLOCKINDEX(PBX nx, PDOSCOL cp, PKXBASE kp)
{
Next = nx;
Tdbp = (cp) ? (PTDBDOS)cp->GetTo_Tdb() : NULL;
Colp = cp;
Kxp = kp;
Type = (cp) ? cp->GetResultType() : TYPE_ERROR;
Sorted = (cp) ? cp->IsSorted() > 0 : FALSE;
Result = 0;
} // end of BLOCKINDEX constructor
/***********************************************************************/
/* Reset Bot and Top values of optimized Kindex blocks. */
/***********************************************************************/
void BLOCKINDEX::Reset(void)
{
if (Next)
Next->Reset();
Kxp->Reset();
} // end of Reset
/***********************************************************************/
/* Evaluate block indexing test. */
/***********************************************************************/
int BLOCKINDEX::BlockEval(PGLOBAL g)
{
#if defined(_DEBUG)
assert (Tdbp && Colp);
#endif
int n = Tdbp->GetCurBlk();
void *minp = Colp->GetMin()->GetValPtr(n);
void *maxp = Colp->GetMax()->GetValPtr(n);
Result = Kxp->BlockTest(g, minp, maxp, Type, Sorted);
return Result;
} // end of BlockEval
/***********************************************************************/
/* Make file output of BLOCKINDEX contents. */
/***********************************************************************/
void BLOCKINDEX::Printf(PGLOBAL g, FILE *f, UINT n)
{
char m[64];
memset(m, ' ', n); // Make margin string
m[n] = '\0';
fprintf(f, "%sBLOCKINDEX: at %p next=%p col=%s kxp=%p result=%d\n",
m, this, Next, (Colp) ? Colp->GetName() : "Rowid", Kxp, Result);
if (Next)
Next->Printf(g, f, n);
} // end of Printf
/***********************************************************************/
/* Make string output of BLOCKINDEX contents. */
/***********************************************************************/
void BLOCKINDEX::Prints(PGLOBAL g, char *ps, UINT z)
{
strncat(ps, "BlockIndex(es)", z);
} // end of Prints
/* ------------------------------------------------------------------- */
/***********************************************************************/
/* Implementation of the BLOCKINDX2 class. */
/***********************************************************************/
BLOCKINDX2::BLOCKINDX2(PBX nx, PDOSCOL cp, PKXBASE kp)
: BLOCKINDEX(nx, cp, kp)
{
Nbm = Colp->GetNbm();
Dval = Colp->GetDval();
Bmap = Colp->GetBmap();
#if defined(_DEBUG)
assert(Dval && Bmap);
#endif
} // end of BLOCKINDX2 constructor
/***********************************************************************/
/* Evaluate block indexing test. */
/***********************************************************************/
int BLOCKINDX2::BlockEval(PGLOBAL g)
{
int n = Tdbp->GetCurBlk();
PUINT bmp = (PUINT)Bmap->GetValPtr(n * Nbm);
Result = Kxp->BlockTst2(g, Dval, bmp, Nbm, Type, Sorted);
return Result;
} // end of BlockEval
/* ------------------------------------------------------------------- */
/***********************************************************************/
/* Implementation of the BLKSPCINDX class. */
/***********************************************************************/
BLKSPCINDX::BLKSPCINDX(PBX nx, PTDBDOS tp, PKXBASE kp, int bsize)
: BLOCKINDEX(nx, NULL, kp)
{
Tdbp = tp;
Bsize = bsize;
Type = TYPE_INT;
Sorted = TRUE;
} // end of BLKSPCINDX constructor
/***********************************************************************/
/* Evaluate block indexing test. */
/***********************************************************************/
int BLKSPCINDX::BlockEval(PGLOBAL g)
{
int n = Tdbp->GetCurBlk();
int minrow = n * Bsize + 1; // Minimum Rowid value for this block
int maxrow = (n + 1) * Bsize; // Maximum Rowid value for this block
Result = Kxp->BlockTest(g, &minrow, &maxrow, TYPE_INT, TRUE);
return Result;
} // end of BlockEval
#endif // 0
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