/************* TabVct C++ Program Source Code File (.CPP) **************/ /* PROGRAM NAME: TABVCT */ /* ------------- */ /* Version 3.8 */ /* */ /* COPYRIGHT: */ /* ---------- */ /* (C) Copyright to the author Olivier BERTRAND 1999-2014 */ /* */ /* WHAT THIS PROGRAM DOES: */ /* ----------------------- */ /* This is the TDBVCT and VCTCOL classes implementation routines. */ /* */ /* WHAT YOU NEED TO COMPILE THIS PROGRAM: */ /* -------------------------------------- */ /* */ /* REQUIRED FILES: */ /* --------------- */ /* TABVCT.C - Source code */ /* PLGDBSEM.H - DB application declaration file */ /* TABDOS.H - TABDOS classes declaration file */ /* GLOBAL.H - Global declaration file */ /* */ /* REQUIRED LIBRARIES: */ /* ------------------- */ /* Large model C library */ /* */ /* REQUIRED PROGRAMS: */ /* ------------------ */ /* IBM, Borland, GNU or Microsoft C++ Compiler and Linker */ /* */ /***********************************************************************/ /***********************************************************************/ /* Include relevant MariaDB header file. */ /***********************************************************************/ #include "my_global.h" #if defined(WIN32) #include #include #if defined(__BORLANDC__) #define __MFC_COMPAT__ // To define min/max as macro #endif //#include #include #else #if defined(UNIX) #include #include #include #include #define NO_ERROR 0 #else #include #endif #include #endif /***********************************************************************/ /* Include application header files: */ /* global.h is header containing all global declarations. */ /* plgdbsem.h is header containing the DB application declarations. */ /* tabdos.h is header containing the TABDOS class declarations. */ /***********************************************************************/ #include "global.h" #include "plgdbsem.h" #include "reldef.h" #include "osutil.h" #include "filamvct.h" #include "tabdos.h" #include "tabvct.h" #include "valblk.h" #if defined(UNIX) //add dummy strerror (NGC) char *strerror(int num); #endif // UNIX extern "C" int trace; /***********************************************************************/ /* Char VCT column blocks are right filled with blanks (blank = true) */ /* Conversion of block values allowed conditionally for insert only. */ /***********************************************************************/ PVBLK AllocValBlock(PGLOBAL, void *, int, int, int, int, bool check = true, bool blank = true, bool un = false); /* --------------------------- Class VCTDEF -------------------------- */ /***********************************************************************/ /* DefineAM: define specific AM block values from XDB file. */ /***********************************************************************/ bool VCTDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff) { DOSDEF::DefineAM(g, "BIN", poff); Estimate = GetIntCatInfo("Estimate", 0); Split = GetIntCatInfo("Split", (Estimate) ? 0 : 1); Header = GetIntCatInfo("Header", 0); // CONNECT must have Block/Last info for VEC tables if (Estimate && !Split && !Header) { char *fn = GetStringCatInfo(g, "Filename", "?"); // No separate header file fo urbi tables Header = (*fn == '?') ? 3 : 2; } // endif Estimate Recfm = RECFM_VCT; // For packed files the logical record length is calculated in poff if (poff != Lrecl) { Lrecl = poff; SetIntCatInfo("Lrecl", poff); } // endif poff Padded = false; Blksize = 0; return false; } // end of DefineAM #if 0 /***********************************************************************/ /* Erase: This was made a separate routine because a strange thing */ /* happened when DeleteTablefile was defined for the VCTDEF class: */ /* when called from Catalog, the DOSDEF routine was still called even */ /* for a VCTDEF class. It also minimizes the specific code. */ /***********************************************************************/ bool VCTDEF::Erase(char *filename) { bool rc = false; if (Split) { char fpat[_MAX_PATH]; int i; PCOLDEF cdp; MakeFnPattern(fpat); for (i = 1, cdp = To_Cols; cdp; i++, cdp = cdp->GetNext()) { sprintf(filename, fpat, i); //#if defined(WIN32) // rc |= !DeleteFile(filename); //#else // UNIX rc |= remove(filename); //#endif // UNIX } // endfor cdp } else { rc = DOSDEF::Erase(filename); if (Estimate && Header == 2) { PlugSetPath(filename, Fn, GetPath()); strcat(PlugRemoveType(filename, filename), ".blk"); rc |= remove(filename); } // endif Header } // endif Split return rc; // Return true if error } // end of Erase #endif // 0 /***********************************************************************/ /* Prepare the column file name pattern for a split table. */ /* This function returns the number of columns of the table. */ /***********************************************************************/ int VCTDEF::MakeFnPattern(char *fpat) { char pat[8]; #if !defined(UNIX) char drive[_MAX_DRIVE]; #else char *drive = NULL; #endif char direc[_MAX_DIR]; char fname[_MAX_FNAME]; char ftype[_MAX_EXT]; // File extention int n, m, ncol = 0; PCOLDEF cdp; for (cdp = To_Cols; cdp; cdp = cdp->GetNext()) ncol++; for (n = 1, m = ncol; m /= 10; n++) ; sprintf(pat, "%%0%dd", n); _splitpath(Fn, drive, direc, fname, ftype); strcat(fname, pat); _makepath(fpat, drive, direc, fname, ftype); PlugSetPath(fpat, fpat, GetPath()); return ncol; } // end of MakeFnPattern /***********************************************************************/ /* GetTable: makes a new Table Description Block. */ /***********************************************************************/ PTDB VCTDEF::GetTable(PGLOBAL g, MODE mode) { /*********************************************************************/ /* Allocate a TDB of the proper type. */ /* Column blocks will be allocated only when needed. */ /*********************************************************************/ // Mapping not used for insert (except for true VEC not split tables) // or when UseTemp is forced bool map = Mapped && (Estimate || mode != MODE_INSERT) && !(PlgGetUser(g)->UseTemp == TMP_FORCE && (mode == MODE_UPDATE || mode == MODE_DELETE)); PTXF txfp; PTDB tdbp; if (Multiple) { strcpy(g->Message, MSG(NO_MUL_VCT)); return NULL; } // endif Multiple if (Split) { if (map) txfp = new(g) VMPFAM(this); else txfp = new(g) VECFAM(this); } else if (Huge) txfp = new(g) BGVFAM(this); else if (map) txfp = new(g) VCMFAM(this); else txfp = new(g) VCTFAM(this); tdbp = new(g) TDBVCT(this, txfp); /*********************************************************************/ /* For block tables, get eventually saved optimization values. */ /*********************************************************************/ if (mode != MODE_INSERT) if (tdbp->GetBlockValues(g)) PushWarning(g, (PTDBASE)tdbp); // return NULL; // causes a crash when deleting index return tdbp; } // end of GetTable /* --------------------------- Class TDBVCT -------------------------- */ /***********************************************************************/ /* Implementation of the TDBVCT class. */ /***********************************************************************/ TDBVCT::TDBVCT(PVCTDEF tdp, PTXF txfp) : TDBFIX(tdp, txfp) { To_SetCols = NULL; } // end of TDBVCT standard constructor TDBVCT::TDBVCT(PGLOBAL g, PTDBVCT tdbp) : TDBFIX(g, tdbp) { To_SetCols = tdbp->To_SetCols; } // end of TDBVCT copy constructor // Method PTDB TDBVCT::CopyOne(PTABS t) { PTDB tp; PVCTCOL cp1, cp2; PGLOBAL g = t->G; // Is this really useful ??? tp = new(g) TDBVCT(g, this); for (cp1 = (PVCTCOL)Columns; cp1; cp1 = (PVCTCOL)cp1->Next) { cp2 = new(g) VCTCOL(cp1, tp); // Make a copy NewPointer(t, cp1, cp2); } // endfor cp1 return tp; } // end of CopyOne /***********************************************************************/ /* Allocate VCT column description block. */ /***********************************************************************/ PCOL TDBVCT::MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n) { return new(g) VCTCOL(g, cdp, this, cprec, n); } // end of MakeCol /***********************************************************************/ /* VCT Access Method opening routine. */ /* New method now that this routine is called recursively (last table */ /* first in reverse order): index blocks are immediately linked to */ /* join block of next table if it exists or else are discarted. */ /***********************************************************************/ bool TDBVCT::OpenDB(PGLOBAL g) { if (trace) htrc("VCT OpenDB: tdbp=%p tdb=R%d use=%d key=%p mode=%d\n", this, Tdb_No, Use, To_Key_Col, Mode); if (Use == USE_OPEN) { /*******************************************************************/ /* Table already open, just replace it at its beginning. */ /*******************************************************************/ if (To_Kindex) // Table is to be accessed through a sorted index table To_Kindex->Reset(); Txfp->Rewind(); ResetBlockFilter(g); return false; } // endif Use /*********************************************************************/ /* Delete all is not handled using file mapping. */ /*********************************************************************/ if (Mode == MODE_DELETE && !Next && Txfp->GetAmType() == TYPE_AM_MAP) { Txfp = new(g) VCTFAM((PVCTDEF)To_Def); Txfp->SetTdbp(this); } // endif Mode /*********************************************************************/ /* Open according to input/output mode required and */ /* allocate the block buffers for columns used in the query. */ /*********************************************************************/ if (Txfp->OpenTableFile(g)) return true; // This was not done in previous version Use = USE_OPEN; // Do it now in case we are recursively called /*********************************************************************/ /* Allocate the block filter tree if evaluation is possible. */ /*********************************************************************/ To_BlkFil = InitBlockFilter(g, To_Filter); /*********************************************************************/ /* Reset buffer access according to indexing and to mode. */ /*********************************************************************/ Txfp->ResetBuffer(g); return false; } // end of OpenDB /***********************************************************************/ /* Data Base read routine for VCT access method. */ /* This routine just set the new block index and record position. */ /* For index accessed tables the physical reading is deferred to the */ /* ReadColumn routine so only really used column are physically read. */ /***********************************************************************/ int TDBVCT::ReadDB(PGLOBAL g) { if (trace) htrc("VCT ReadDB: R%d Mode=%d CurBlk=%d CurNum=%d key=%p link=%p Kindex=%p\n", GetTdb_No(), Mode, Txfp->CurBlk, Txfp->CurNum, To_Key_Col, To_Link, To_Kindex); if (To_Kindex) { /*******************************************************************/ /* Reading is by an index table. */ /*******************************************************************/ int recpos = To_Kindex->Fetch(g); switch (recpos) { case -1: // End of file reached return RC_EF; case -2: // No match for join return RC_NF; case -3: // Same record as last non null one // num_there++; return RC_OK; default: /***************************************************************/ /* Set the file position according to record to read. */ /***************************************************************/ if (SetRecpos(g, recpos)) return RC_FX; } // endswitch recpos } // endif To_Kindex return ReadBuffer(g); } // end of ReadDB /***********************************************************************/ /* Data Base close routine for VEC access method. */ /***********************************************************************/ void TDBVCT::CloseDB(PGLOBAL g) { if (To_Kindex) { To_Kindex->Close(); To_Kindex = NULL; } // endif Txfp->CloseTableFile(g, false); } // end of CloseDB // ------------------------ VCTCOL functions ---------------------------- /***********************************************************************/ /* VCTCOL public constructor. */ /***********************************************************************/ VCTCOL::VCTCOL(PGLOBAL g, PCOLDEF cdp, PTDB tdbp, PCOL cprec, int i) : DOSCOL(g, cdp, tdbp, cprec, i, "VCT") { Deplac = cdp->GetPoff(); Clen = cdp->GetClen(); // Length of the field in the file ColBlk = -1; ColPos = -1; Blk = NULL; Modif = 0; } // end of VCTCOL constructor /***********************************************************************/ /* VCTCOL constructor used for copying columns. */ /* tdbp is the pointer to the new table descriptor. */ /***********************************************************************/ VCTCOL::VCTCOL(VCTCOL *col1, PTDB tdbp) : DOSCOL(col1, tdbp) { ColBlk = col1->ColBlk; ColPos = col1->ColPos; Blk = col1->Blk; // Should be NULL when copying ???? Modif = col1->Modif; // Should be 0 ???? } // end of VCTCOL copy constructor /***********************************************************************/ /* SetBuffer: allocate and set the buffers needed for write operation.*/ /***********************************************************************/ bool VCTCOL::SetBuffer(PGLOBAL g, PVAL value, bool ok, bool check) { // Eventual conversion will be done when setting ValBlk from Value. Value = value; // Force To_Val == Value if (DOSCOL::SetBuffer(g, value, ok, check)) return true; if (To_Tdb->GetMode() != MODE_INSERT) { // Allocate the block buffer to use for read/writing except when // updating a mapped VCT table and Ok is true. PTDBVCT tdbp = (PTDBVCT)To_Tdb; if (tdbp->Txfp->GetAmType() == TYPE_AM_VMP && ok) { Blk = AllocValBlock(g, (void*)1, Buf_Type, tdbp->Txfp->Nrec, Format.Length, Format.Prec, check); Status |= BUF_MAPPED; // Will point into mapped file } else Blk = AllocValBlock(g, NULL, Buf_Type, tdbp->Txfp->Nrec, Format.Length, Format.Prec, check); } // endif Mode return false; } // end of SetBuffer /***********************************************************************/ /* ReadBlock: Indicate it is Ok to make updates. */ /***********************************************************************/ void VCTCOL::SetOk(void) { if (((PTDBVCT)To_Tdb)->Txfp->GetAmType() == TYPE_AM_VMP) Status |= BUF_MAPPED; Status |= BUF_EMPTY; Modif = 0; } // end of SetOk /***********************************************************************/ /* ReadBlock: Read column values from current block. */ /***********************************************************************/ void VCTCOL::ReadBlock(PGLOBAL g) { PVCTFAM txfp = (PVCTFAM)((PTDBVCT)To_Tdb)->Txfp; #if defined(_DEBUG) if (!Blk) { strcpy(g->Message, MSG(TO_BLK_IS_NULL)); longjmp(g->jumper[g->jump_level], 58); } // endif #endif /*********************************************************************/ /* Read column block according to used access method. */ /*********************************************************************/ if (txfp->ReadBlock(g, this)) longjmp(g->jumper[g->jump_level], 6); ColBlk = txfp->CurBlk; ColPos = -1; // Any invalid position } // end of ReadBlock /***********************************************************************/ /* WriteBlock: Write back current column values for one block. */ /* Note: the test of Status is meant to prevent physical writing of */ /* the block during the checking loop in mode Update. It is set to */ /* BUF_EMPTY when reopening the table between the two loops. */ /***********************************************************************/ void VCTCOL::WriteBlock(PGLOBAL g) { if (Modif && (Status & BUF_EMPTY)) { PVCTFAM txfp = (PVCTFAM)((PTDBVCT)To_Tdb)->Txfp; #if defined(_DEBUG) if (!Blk) { strcpy(g->Message, MSG(BLK_IS_NULL)); longjmp(g->jumper[g->jump_level], 56); } // endif #endif /*******************************************************************/ /* Write column block according to used access method. */ /*******************************************************************/ if (txfp->WriteBlock(g, this)) longjmp(g->jumper[g->jump_level], 6); Modif = 0; } // endif Modif } // end of WriteBlock /***********************************************************************/ /* ReadColumn: what this routine does is to check whether a column */ /* block has been read from the file, then to extract from it the */ /* field corresponding to this column and convert it to buffer type. */ /***********************************************************************/ void VCTCOL::ReadColumn(PGLOBAL g) { PTXF txfp = ((PTDBVCT)To_Tdb)->Txfp; #if defined(_DEBUG) assert (!To_Kcol); #endif if (trace > 1) htrc("VCT ReadColumn: col %s R%d coluse=%.4X status=%.4X buf_type=%d\n", Name, To_Tdb->GetTdb_No(), ColUse, Status, Buf_Type); if (ColBlk != txfp->CurBlk) ReadBlock(g); else if (ColPos == txfp->CurNum) return; // Value is already there //ColBlk = txfp->CurBlk; done in ReadBlock ColPos = txfp->CurNum; Value->SetValue_pvblk(Blk, ColPos); // Set null when applicable if (Nullable) Value->SetNull(Value->IsZero()); } // end of ReadColumn /***********************************************************************/ /* WriteColumn: Modifications are written back into column buffer. */ /* On each change of block the buffer is written back to file and */ /* in mode Insert the buffer is filled with the block to update. */ /***********************************************************************/ void VCTCOL::WriteColumn(PGLOBAL g) { PTXF txfp = ((PTDBVCT)To_Tdb)->Txfp;; if (trace > 1) htrc("VCT WriteColumn: col %s R%d coluse=%.4X status=%.4X buf_type=%d\n", Name, To_Tdb->GetTdb_No(), ColUse, Status, Buf_Type); ColBlk = txfp->CurBlk; ColPos = txfp->CurNum; Blk->SetValue(Value, ColPos); Modif++; } // end of WriteColumn /* ------------------------ End of TabVct ---------------------------- */