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mariadb/storage/connect/tabpivot.cpp
Mikhail Chalov 2ff01e763e Fix insecure use of strcpy, strcat and sprintf in Connect 
Old style C functions `strcpy()`, `strcat()` and `sprintf()` are vulnerable to
security issues due to lacking memory boundary checks. Replace these in the
Connect storage engine with safe new and/or custom functions such as
`snprintf()` `safe_strcpy()` and `safe_strcat()`.

With this change FlawFinder and other static security analyzers report 287
fewer findings.

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.
2023-05-12 15:37:00 +01:00

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/************ TabPivot C++ Program Source Code File (.CPP) *************/
/* PROGRAM NAME: TABPIVOT */
/* ------------- */
/* Version 1.7 */
/* */
/* COPYRIGHT: */
/* ---------- */
/* (C) Copyright to the author Olivier BERTRAND 2005-2017 */
/* */
/* WHAT THIS PROGRAM DOES: */
/* ----------------------- */
/* This program are the PIVOT classes DB execution routines. */
/***********************************************************************/
/***********************************************************************/
/* Include relevant sections of the operating system header file. */
/***********************************************************************/
#include "my_global.h"
#include "table.h" // MySQL table definitions
#if defined(_WIN32)
#if defined(__BORLANDC__)
#define __MFC_COMPAT__ // To define min/max as macro
#endif
//#include <windows.h>
#elif defined(UNIX)
#include <errno.h>
#include <unistd.h>
#include "osutil.h"
#else
#include <io.h>
#endif
/***********************************************************************/
/* Include application header files: */
/* global.h is header containing all global declarations. */
/* plgdbsem.h is header containing the DB application declarations. */
/***********************************************************************/
#define FRM_VER 6
#include "sql_const.h"
#include "field.h"
#include "global.h"
#include "plgdbsem.h"
#include "xtable.h"
#include "tabext.h"
#include "tabcol.h"
#include "colblk.h"
#include "tabmysql.h"
#include "csort.h"
#include "tabutil.h"
#include "tabpivot.h"
#include "valblk.h"
#include "ha_connect.h"
/***********************************************************************/
/* Make the Pivot table column list. */
/***********************************************************************/
PQRYRES PivotColumns(PGLOBAL g, const char *tab, const char *src,
const char *picol, const char *fncol,
const char *skcol, const char *host,
const char *db, const char *user,
const char *pwd, int port)
{
PIVAID pvd(tab, src, picol, fncol, skcol, host, db, user, pwd, port);
return pvd.MakePivotColumns(g);
} // end of PivotColumns
/* --------------- Implementation of the PIVAID classe --------------- */
/***********************************************************************/
/* PIVAID constructor. */
/***********************************************************************/
PIVAID::PIVAID(const char *tab, const char *src, const char *picol,
const char *fncol, const char *skcol, const char *host,
const char *db, const char *user, const char *pwd,
int port) : CSORT(false)
{
Host = (char*)host;
User = (char*)user;
Pwd = (char*)pwd;
Qryp = NULL;
Database = (char*)db;
Tabname = (char*)tab;
Tabsrc = (char*)src;
Picol = (char*)picol;
Fncol = (char*)fncol;
Skcol = (char*)skcol;
Rblkp = NULL;
Port = (port) ? port : GetDefaultPort();
} // end of PIVAID constructor
/***********************************************************************/
/* Skip columns that are in the skipped column list. */
/***********************************************************************/
bool PIVAID::SkipColumn(PCOLRES crp, char *skc)
{
if (skc)
for (char *p = skc; *p; p += (strlen(p) + 1))
if (!stricmp(crp->Name, p))
return true;
return false;
} // end of SkipColumn
/***********************************************************************/
/* Make the Pivot table column list. */
/***********************************************************************/
PQRYRES PIVAID::MakePivotColumns(PGLOBAL g)
{
char *p, *query, *colname, *skc, buf[64];
int ndif, nblin, w = 0;
bool b = false;
PVAL valp;
PQRYRES qrp;
PCOLRES *pcrp, crp, fncrp = NULL;
try {
// Are there columns to skip?
if (Skcol) {
uint n = strlen(Skcol);
skc = (char*)PlugSubAlloc(g, NULL, n + 2);
snprintf(skc, n + 2, "%s", Skcol);
skc[n + 1] = 0;
// Replace ; by nulls in skc
for (p = strchr(skc, ';'); p; p = strchr(p, ';'))
*p++ = 0;
} else
skc = NULL;
if (!Tabsrc && Tabname) {
// Locate the query
query = (char*)PlugSubAlloc(g, NULL, strlen(Tabname) + 26);
snprintf(query, strlen(Tabname) + 26, "SELECT * FROM `%s` LIMIT 1", Tabname);
} else if (!Tabsrc) {
snprintf(g->Message, sizeof(g->Message), MSG(SRC_TABLE_UNDEF));
goto err;
} else
query = (char*)Tabsrc;
// Open a MySQL connection for this table
if (!Myc.Open(g, Host, Database, User, Pwd, Port)) {
b = true;
// Returned values must be in their original character set
if (Myc.ExecSQL(g, "SET character_set_results=NULL", &w) == RC_FX)
goto err;
else
Myc.FreeResult();
} else
goto err;
// Send the source command to MySQL
if (Myc.ExecSQL(g, query, &w) == RC_FX)
goto err;
// We must have a storage query to get pivot column values
if (!(Qryp = Myc.GetResult(g, true)))
goto err;
if (!Fncol) {
for (crp = Qryp->Colresp; crp; crp = crp->Next)
if ((!Picol || stricmp(Picol, crp->Name)) && !SkipColumn(crp, skc))
Fncol = crp->Name;
if (!Fncol) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_DEF_FNCCOL));
goto err;
} // endif Fncol
} // endif Fncol
if (!Picol) {
// Find default Picol as the last one not equal to Fncol
for (crp = Qryp->Colresp; crp; crp = crp->Next)
if (stricmp(Fncol, crp->Name) && !SkipColumn(crp, skc))
Picol = crp->Name;
if (!Picol) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_DEF_PIVOTCOL));
goto err;
} // endif Picol
} // endif picol
// Prepare the column list
for (pcrp = &Qryp->Colresp; (crp = *pcrp); )
if (SkipColumn(crp, skc)) {
// Ignore this column
*pcrp = crp->Next;
} else if (!stricmp(Picol, crp->Name)) {
if (crp->Nulls) {
snprintf(g->Message, sizeof(g->Message), "Pivot column %s cannot be nullable", Picol);
goto err;
} // endif Nulls
Rblkp = crp->Kdata;
*pcrp = crp->Next;
} else if (!stricmp(Fncol, crp->Name)) {
fncrp = crp;
*pcrp = crp->Next;
} else
pcrp = &crp->Next;
if (!Rblkp) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_DEF_PIVOTCOL));
goto err;
} else if (!fncrp) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_DEF_FNCCOL));
goto err;
} // endif
if (Tabsrc) {
Myc.Close();
b = false;
// Before calling sort, initialize all
nblin = Qryp->Nblin;
Index.Size = nblin * sizeof(int);
Index.Sub = TRUE; // Should be small enough
if (!PlgDBalloc(g, NULL, Index))
goto err;
Offset.Size = (nblin + 1) * sizeof(int);
Offset.Sub = TRUE; // Should be small enough
if (!PlgDBalloc(g, NULL, Offset))
goto err;
ndif = Qsort(g, nblin);
if (ndif < 0) // error
goto err;
} else {
// The query was limited, we must get pivot column values
// Returned values must be in their original character set
// if (Myc.ExecSQL(g, "SET character_set_results=NULL", &w) == RC_FX)
// goto err;
query = (char*)PlugSubAlloc(g, NULL, 0);
sprintf(query, "SELECT DISTINCT `%s` FROM `%s`", Picol, Tabname);
PlugSubAlloc(g, NULL, strlen(query) + 1);
Myc.FreeResult();
// Send the source command to MySQL
if (Myc.ExecSQL(g, query, &w) == RC_FX)
goto err;
// We must have a storage query to get pivot column values
if (!(qrp = Myc.GetResult(g, true)))
goto err;
Myc.Close();
b = false;
// Get the column list
crp = qrp->Colresp;
Rblkp = crp->Kdata;
ndif = qrp->Nblin;
} // endif Tabsrc
// Allocate the Value used to retieve column names
if (!(valp = AllocateValue(g, Rblkp->GetType(),
Rblkp->GetVlen(),
Rblkp->GetPrec())))
goto err;
// Now make the functional columns
for (int i = 0; i < ndif; i++) {
if (i) {
crp = (PCOLRES)PlugSubAlloc(g, NULL, sizeof(COLRES));
memcpy(crp, fncrp, sizeof(COLRES));
} else
crp = fncrp;
// Get the value that will be the generated column name
if (Tabsrc)
valp->SetValue_pvblk(Rblkp, Pex[Pof[i]]);
else
valp->SetValue_pvblk(Rblkp, i);
colname = valp->GetCharString(buf);
crp->Name = PlugDup(g, colname);
crp->Flag = 1;
// Add this column
*pcrp = crp;
crp->Next = NULL;
pcrp = &crp->Next;
} // endfor i
// We added ndif columns and removed 2 (picol and fncol)
Qryp->Nbcol += (ndif - 2);
return Qryp;
} catch (int n) {
if (trace(1))
htrc("Exception %d: %s\n", n, g->Message);
} catch (const char *msg) {
snprintf(g->Message, sizeof(g->Message), "%s", msg);
} // end catch
err:
if (b)
Myc.Close();
return NULL;
} // end of MakePivotColumns
/***********************************************************************/
/* PIVAID: Compare routine for sorting pivot column values. */
/***********************************************************************/
int PIVAID::Qcompare(int *i1, int *i2)
{
// TODO: the actual comparison between pivot column result values.
return Rblkp->CompVal(*i1, *i2);
} // end of Qcompare
/* --------------- Implementation of the PIVOT classes --------------- */
/***********************************************************************/
/* PIVOTDEF constructor. */
/***********************************************************************/
PIVOTDEF::PIVOTDEF(void)
{
Host = User = Pwd = DB = NULL;
Tabname = Tabsrc = Picol = Fncol = Function = NULL;
GBdone = Accept = false;
Port = 0;
} // end of PIVOTDEF constructor
/***********************************************************************/
/* DefineAM: define specific AM block values from PIVOT table. */
/***********************************************************************/
bool PIVOTDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff)
{
char *p1, *p2;
PHC hc __attribute__((unused))= ((MYCAT*)Cat)->GetHandler();
if (PRXDEF::DefineAM(g, am, poff))
return TRUE;
Tabname = (char*)Tablep->GetName();
DB = (char*)Tablep->GetSchema();
Tabsrc = (char*)Tablep->GetSrc();
Host = GetStringCatInfo(g, "Host", "localhost");
User = GetStringCatInfo(g, "User", "*");
Pwd = GetStringCatInfo(g, "Password", NULL);
Picol = GetStringCatInfo(g, "PivotCol", NULL);
Fncol = GetStringCatInfo(g, "FncCol", NULL);
// If fncol is like avg(colname), separate Fncol and Function
if (Fncol && (p1 = strchr(Fncol, '(')) && (p2 = strchr(p1, ')')) &&
(*Fncol != '"') && (!*(p2+1))) {
*p1++ = '\0'; *p2 = '\0';
Function = Fncol;
Fncol = p1;
} else
Function = GetStringCatInfo(g, "Function", "SUM");
GBdone = GetBoolCatInfo("Groupby", false);
Accept = GetBoolCatInfo("Accept", false);
Port = GetIntCatInfo("Port", 3306);
Desc = (Tabsrc) ? Tabsrc : Tabname;
return FALSE;
} // end of DefineAM
/***********************************************************************/
/* GetTable: makes a new TDB of the proper type. */
/***********************************************************************/
PTDB PIVOTDEF::GetTable(PGLOBAL g, MODE)
{
return new(g) TDBPIVOT(this);
} // end of GetTable
/* ------------------------------------------------------------------- */
/***********************************************************************/
/* Implementation of the TDBPIVOT class. */
/***********************************************************************/
TDBPIVOT::TDBPIVOT(PPIVOTDEF tdp) : TDBPRX(tdp)
{
Host = tdp->Host;
Database = tdp->DB;
User = tdp->User;
Pwd = tdp->Pwd;
Port = tdp->Port;
Tabname = tdp->Tabname; // Name of source table
Tabsrc = tdp->Tabsrc; // SQL description of source table
Picol = tdp->Picol; // Pivot column name
Fncol = tdp->Fncol; // Function column name
Function = tdp->Function; // Aggregate function name
Xcolp = NULL; // To the FNCCOL column
//Xresp = NULL; // To the pivot result column
//Rblkp = NULL; // The value block of the pivot column
Fcolp = NULL; // To the function column
Dcolp = NULL; // To the dump column
GBdone = tdp->GBdone;
Accept = tdp->Accept;
Mult = -1; // Estimated table size
N = 0; // The current table index
M = 0; // The occurence rank
FileStatus = 0; // Logical End-of-File
RowFlag = 0; // 0: Ok, 1: Same, 2: Skip
} // end of TDBPIVOT constructor
/***********************************************************************/
/* Allocate source column description block. */
/***********************************************************************/
PCOL TDBPIVOT::MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n)
{
PCOL colp;
if (cdp->GetOffset()) {
colp = new(g) FNCCOL(cdp, this, cprec, n);
if (cdp->GetOffset() > 1)
Dcolp = colp;
} else
colp = new(g) SRCCOL(cdp, this, cprec, n);
return colp;
} // end of MakeCol
/***********************************************************************/
/* Find default fonction and pivot columns. */
/***********************************************************************/
bool TDBPIVOT::FindDefaultColumns(PGLOBAL g)
{
PCOLDEF cdp;
PTABDEF defp = Tdbp->GetDef();
if (!Fncol) {
for (cdp = defp->GetCols(); cdp; cdp = cdp->GetNext())
if (!Picol || stricmp(Picol, cdp->GetName()))
Fncol = cdp->GetName();
if (!Fncol) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_DEF_FNCCOL));
return true;
} // endif Fncol
} // endif Fncol
if (!Picol) {
// Find default Picol as the last one not equal to Fncol
for (cdp = defp->GetCols(); cdp; cdp = cdp->GetNext())
if (stricmp(Fncol, cdp->GetName()))
Picol = cdp->GetName();
if (!Picol) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_DEF_PIVOTCOL));
return true;
} // endif Picol
} // endif Picol
return false;
} // end of FindDefaultColumns
/***********************************************************************/
/* Prepare the source table Query. */
/***********************************************************************/
bool TDBPIVOT::GetSourceTable(PGLOBAL g)
{
if (Tdbp)
return false; // Already done
if (!Tabsrc && Tabname) {
// Get the table description block of this table
if (!(Tdbp = GetSubTable(g, ((PPIVOTDEF)To_Def)->Tablep, true)))
return true;
if (!GBdone) {
char *colist;
PCOLDEF cdp;
if (FindDefaultColumns(g))
return true;
// Locate the suballocated colist (size is not known yet)
*(colist = (char*)PlugSubAlloc(g, NULL, 0)) = 0;
// Make the column list
for (cdp = To_Def->GetCols(); cdp; cdp = cdp->GetNext())
if (!cdp->GetOffset())
strcat(strcat(colist, cdp->GetName()), ", ");
// Add the Pivot column at the end of the list
strcat(colist, Picol);
// Now we know how much was suballocated
PlugSubAlloc(g, NULL, strlen(colist) + 1);
// Locate the source string (size is not known yet)
Tabsrc = (char*)PlugSubAlloc(g, NULL, 0);
// Start making the definition
strcat(strcat(strcpy(Tabsrc, "SELECT "), colist), ", ");
// Make it suitable for Pivot by doing the group by
strcat(strcat(Tabsrc, Function), "(");
strcat(strcat(strcat(Tabsrc, Fncol), ") "), Fncol);
strcat(strcat(Tabsrc, " FROM "), Tabname);
strcat(strcat(Tabsrc, " GROUP BY "), colist);
if (Tdbp->IsView()) // Until MariaDB bug is fixed
strcat(strcat(Tabsrc, " ORDER BY "), colist);
// Now we know how much was suballocated
PlugSubAlloc(g, NULL, strlen(Tabsrc) + 1);
} // endif !GBdone
} else if (!Tabsrc) {
snprintf(g->Message, sizeof(g->Message), MSG(SRC_TABLE_UNDEF));
return true;
} // endif
if (Tabsrc) {
// Get the new table description block of this source table
PTABLE tablep = new(g) XTAB("whatever", Tabsrc);
tablep->SetSchema(Database);
if (!(Tdbp = GetSubTable(g, tablep, true)))
return true;
} // endif Tabsrc
return false;
} // end of GetSourceTable
/***********************************************************************/
/* Make the required pivot columns. */
/***********************************************************************/
bool TDBPIVOT::MakePivotColumns(PGLOBAL g)
{
if (!Tdbp->IsView()) {
// This was not done yet if GBdone is true
if (FindDefaultColumns(g))
return true;
// Now it is time to allocate the pivot and function columns
if (!(Fcolp = Tdbp->ColDB(g, Fncol, 0))) {
// Function column not found in table
snprintf(g->Message, sizeof(g->Message), MSG(COL_ISNOT_TABLE), Fncol, Tabname);
return true;
} else if (Fcolp->InitValue(g))
return true;
if (!(Xcolp = Tdbp->ColDB(g, Picol, 0))) {
// Pivot column not found in table
snprintf(g->Message, sizeof(g->Message), MSG(COL_ISNOT_TABLE), Picol, Tabname);
return true;
} else if (Xcolp->InitValue(g))
return true;
// Check and initialize the subtable columns
for (PCOL cp = Columns; cp; cp = cp->GetNext())
if (cp->GetAmType() == TYPE_AM_SRC) {
if (((PSRCCOL)cp)->Init(g, NULL))
return TRUE;
} else if (cp->GetAmType() == TYPE_AM_FNC)
if (((PFNCCOL)cp)->InitColumn(g))
return TRUE;
} // endif isview
return false;
} // end of MakePivotColumns
/***********************************************************************/
/* Make the required pivot columns for an object view. */
/***********************************************************************/
bool TDBPIVOT::MakeViewColumns(PGLOBAL g)
{
if (Tdbp->IsView()) {
// Tdbp is a view ColDB cannot be used
PCOL colp, cp;
PTDBMY tdbp;
if (Tdbp->GetAmType() != TYPE_AM_MYSQL) {
snprintf(g->Message, sizeof(g->Message),"View is not MySQL");
return true;
} else
tdbp = (PTDBMY)Tdbp;
if (!Fncol && !(Fncol = tdbp->FindFieldColumn(Picol))) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_DEF_FNCCOL));
return true;
} // endif Fncol
if (!Picol && !(Picol = tdbp->FindFieldColumn(Fncol))) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_DEF_PIVOTCOL));
return true;
} // endif Picol
// Now it is time to allocate the pivot and function columns
if (!(Fcolp = tdbp->MakeFieldColumn(g, Fncol)))
return true;
if (!(Xcolp = tdbp->MakeFieldColumn(g, Picol)))
return true;
// Check and initialize the subtable columns
for (cp = Columns; cp; cp = cp->GetNext())
if (cp->GetAmType() == TYPE_AM_SRC) {
if ((colp = tdbp->MakeFieldColumn(g, cp->GetName()))) {
((PSRCCOL)cp)->Colp = colp;
((PSRCCOL)cp)->To_Val = colp->GetValue();
cp->AddStatus(BUF_READ); // All is done here
} else
return true;
} else if (cp->GetAmType() == TYPE_AM_FNC)
if (((PFNCCOL)cp)->InitColumn(g))
return TRUE;
} // endif isview
return false;
} // end of MakeViewColumns
/***********************************************************************/
/* PIVOT GetMaxSize: returns the maximum number of rows in the table. */
/***********************************************************************/
int TDBPIVOT::GetMaxSize(PGLOBAL g __attribute__((unused)))
{
#if 0
if (MaxSize < 0)
MaxSize = MakePivotColumns(g);
return MaxSize;
#endif // 0
return 10;
} // end of GetMaxSize
/***********************************************************************/
/* In this sample, ROWID will be the (virtual) row number, */
/* while ROWNUM will be the occurence rank in the multiple column. */
/***********************************************************************/
int TDBPIVOT::RowNumber(PGLOBAL, bool b)
{
return (b) ? M : N;
} // end of RowNumber
/***********************************************************************/
/* PIVOT Access Method opening routine. */
/***********************************************************************/
bool TDBPIVOT::OpenDB(PGLOBAL g)
{
if (Use == USE_OPEN) {
/*******************************************************************/
/* Table already open, just replace it at its beginning. */
/*******************************************************************/
N = M = 0;
RowFlag = 0;
FileStatus = 0;
return FALSE;
} // endif use
if (Mode != MODE_READ) {
/*******************************************************************/
/* Currently PIVOT tables cannot be modified. */
/*******************************************************************/
snprintf(g->Message, sizeof(g->Message), MSG(TABLE_READ_ONLY), "PIVOT");
return TRUE;
} // endif Mode
if (To_Key_Col || To_Kindex) {
/*******************************************************************/
/* Direct access of PIVOT tables is not implemented yet. */
/*******************************************************************/
snprintf(g->Message, sizeof(g->Message), MSG(NO_PIV_DIR_ACC));
return TRUE;
} // endif To_Key_Col
/*********************************************************************/
/* Do it here if not done yet (should not be the case). */
/*********************************************************************/
if (GetSourceTable(g))
return TRUE;
// For tables, columns must be allocated before opening
if (MakePivotColumns(g))
return TRUE;
/*********************************************************************/
/* Physically open the object table. */
/*********************************************************************/
if (Tdbp->OpenDB(g))
return TRUE;
Use = USE_OPEN; // Do it now in case we are recursively called
/*********************************************************************/
/* Make all required pivot columns for object views. */
/*********************************************************************/
return MakeViewColumns(g);
} // end of OpenDB
/***********************************************************************/
/* Data Base read routine for PIVOT access method. */
/***********************************************************************/
int TDBPIVOT::ReadDB(PGLOBAL g)
{
int rc = RC_OK;
bool newrow = FALSE;
PCOL colp;
if (FileStatus == 2)
return RC_EF;
if (FileStatus)
for (colp = Columns; colp; colp = colp->GetNext())
if (colp->GetAmType() == TYPE_AM_SRC)
((PSRCCOL)colp)->SetColumn();
// New row, reset all function column values
for (colp = Columns; colp; colp = colp->GetNext())
if (colp->GetAmType() == TYPE_AM_FNC)
colp->GetValue()->Reset();
/*********************************************************************/
/* Now start the multi reading process. */
/*********************************************************************/
do {
if (RowFlag != 1) {
if ((rc = Tdbp->ReadDB(g)) != RC_OK) {
if (FileStatus && rc == RC_EF) {
// A prepared row remains to be sent
FileStatus = 2;
rc = RC_OK;
} // endif FileStatus
break;
} // endif rc
for (colp = Tdbp->GetColumns(); colp; colp = colp->GetNext())
colp->ReadColumn(g);
for (colp = Columns; colp; colp = colp->GetNext())
{
if (colp->GetAmType() == TYPE_AM_SRC)
{
if (FileStatus) {
if (((PSRCCOL)colp)->CompareLast()) {
newrow = (RowFlag) ? TRUE : FALSE;
break;
} // endif CompareLast
} else
((PSRCCOL)colp)->SetColumn();
}
}
FileStatus = 1;
} // endif RowFlag
if (newrow) {
RowFlag = 1;
break;
} else
RowFlag = 2;
// Look for the column having this header
for (colp = Columns; colp; colp = colp->GetNext())
if (colp->GetAmType() == TYPE_AM_FNC) {
if (((PFNCCOL)colp)->CompareColumn())
break;
} // endif AmType
if (!colp && !(colp = Dcolp)) {
if (!Accept) {
snprintf(g->Message, sizeof(g->Message), MSG(NO_MATCH_COL));
return RC_FX;
} else
continue;
} // endif colp
// Set the value of the matching column from the fonction value
colp->GetValue()->SetValue_pval(Fcolp->GetValue());
} while (RowFlag == 2);
N++;
return rc;
} // end of ReadDB
/***********************************************************************/
/* WriteDB: Data Base write routine for PIVOT access methods. */
/***********************************************************************/
int TDBPIVOT::WriteDB(PGLOBAL g)
{
snprintf(g->Message, sizeof(g->Message), MSG(TABLE_READ_ONLY), "PIVOT");
return RC_FX;
} // end of WriteDB
/***********************************************************************/
/* Data Base delete line routine for PIVOT access methods. */
/***********************************************************************/
int TDBPIVOT::DeleteDB(PGLOBAL g, int)
{
snprintf(g->Message, sizeof(g->Message), MSG(NO_TABLE_DEL), "PIVOT");
return RC_FX;
} // end of DeleteDB
/***********************************************************************/
/* Data Base close routine for PIVOT access method. */
/***********************************************************************/
void TDBPIVOT::CloseDB(PGLOBAL g)
{
if (Tdbp)
Tdbp->CloseDB(g);
} // end of CloseDB
// ------------------------ FNCCOL functions ----------------------------
/***********************************************************************/
/* FNCCOL public constructor. */
/***********************************************************************/
FNCCOL::FNCCOL(PCOLDEF cdp, PTDB tdbp, PCOL cprec, int i)
: COLBLK(cdp, tdbp, i)
{
if (cprec) {
Next = cprec->GetNext();
cprec->SetNext(this);
} else {
Next = tdbp->GetColumns();
tdbp->SetColumns(this);
} // endif cprec
Value = NULL; // We'll get a new one later
Hval = NULL; // The unconverted header value
Xcolp = NULL;
} // end of FNCCOL constructor
/***********************************************************************/
/* FNCCOL initialization function. */
/***********************************************************************/
bool FNCCOL::InitColumn(PGLOBAL g)
{
// Must have its own value block
if (InitValue(g))
return TRUE;
// Make a value from the column name
Hval = AllocateValue(g, Name, TYPE_STRING);
Hval->SetPrec(1); // Case insensitive
Xcolp = ((PTDBPIVOT)To_Tdb)->Xcolp;
AddStatus(BUF_READ); // All is done here
return FALSE;
} // end of InitColumn
/***********************************************************************/
/* CompareColumn: Compare column value with source column value. */
/***********************************************************************/
bool FNCCOL::CompareColumn(void)
{
// Compare the unconverted values
return Hval->IsEqual(Xcolp->GetValue(), false);
} // end of CompareColumn
// ------------------------ SRCCOL functions ----------------------------
/***********************************************************************/
/* SRCCOL public constructor. */
/***********************************************************************/
SRCCOL::SRCCOL(PCOLDEF cdp, PTDB tdbp, PCOL cprec, int n)
: PRXCOL(cdp, tdbp, cprec, n)
{
} // end of SRCCOL constructor
/***********************************************************************/
/* Initialize the column as pointing to the source column. */
/***********************************************************************/
bool SRCCOL::Init(PGLOBAL g, PTDB tp)
{
if (PRXCOL::Init(g, tp))
return true;
AddStatus(BUF_READ); // All is done here
return false;
} // end of SRCCOL constructor
/***********************************************************************/
/* SetColumn: have the column value set from the source column. */
/***********************************************************************/
void SRCCOL::SetColumn(void)
{
Value->SetValue_pval(To_Val);
} // end of SetColumn
/***********************************************************************/
/* SetColumn: Compare column value with source column value. */
/***********************************************************************/
bool SRCCOL::CompareLast(void)
{
// Compare the unconverted values
return !Value->IsEqual(To_Val, true);
} // end of CompareColumn
/* --------------------- End of TabPivot/TabQrs ---------------------- */
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