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-rw-r--r--storage/connect/table.cpp805
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diff --git a/storage/connect/table.cpp b/storage/connect/table.cpp
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+++ b/storage/connect/table.cpp
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+/************** Table C++ Functions Source Code File (.CPP) ************/
+/* Name: TABLE.CPP Version 2.8 */
+/* */
+/* (C) Copyright to the author Olivier BERTRAND 1999-2017 */
+/* */
+/* This file contains the TBX, TDB and OPJOIN classes functions. */
+/***********************************************************************/
+
+/***********************************************************************/
+/* Include relevant MariaDB header file. */
+/***********************************************************************/
+#include "my_global.h"
+#include "sql_string.h"
+
+/***********************************************************************/
+/* Include required application header files */
+/* global.h is header containing all global Plug declarations. */
+/* plgdbsem.h is header containing the DB applic. declarations. */
+/* xobject.h is header containing XOBJECT derived classes declares. */
+/***********************************************************************/
+#include "global.h"
+#include "plgdbsem.h"
+#include "xtable.h"
+#include "tabcol.h"
+#include "filamtxt.h"
+#include "tabdos.h"
+//#include "catalog.h"
+#include "reldef.h"
+
+int TDB::Tnum = 0;
+
+/***********************************************************************/
+/* Utility routines. */
+/***********************************************************************/
+void NewPointer(PTABS, void *, void *);
+void AddPointer(PTABS, void *);
+
+/* ---------------------------- class TDB ---------------------------- */
+
+/***********************************************************************/
+/* TDB public constructors. */
+/***********************************************************************/
+TDB::TDB(PTABDEF tdp) : Tdb_No(++Tnum)
+{
+ To_Def = tdp;
+ Use = USE_NO;
+ To_Orig = NULL;
+ To_Filter = NULL;
+ To_CondFil = NULL;
+ Cond = NULL;
+ Next = NULL;
+ Name = (tdp) ? tdp->GetName() : NULL;
+ To_Table = NULL;
+ Columns = NULL;
+ To_SetCols = NULL;
+ Degree = (tdp) ? tdp->GetDegree() : 0;
+ Mode = MODE_ANY;
+ Cardinal = -1;
+ MaxSize = -1;
+ Read_Only = (tdp) ? tdp->IsReadOnly() : false;
+ m_data_charset = (tdp) ? tdp->data_charset() : NULL;
+ csname = (tdp) ? tdp->csname : NULL;
+} // end of TDB standard constructor
+
+TDB::TDB(PTDB tdbp) : Tdb_No(++Tnum)
+{
+ To_Def = tdbp->To_Def;
+ Use = tdbp->Use;
+ To_Orig = tdbp;
+ To_Filter = NULL;
+ To_CondFil = NULL;
+ Cond = NULL;
+ Next = NULL;
+ Name = tdbp->Name;
+ To_Table = tdbp->To_Table;
+ Columns = NULL;
+ To_SetCols = tdbp->To_SetCols; // ???
+ Degree = tdbp->Degree;
+ Mode = tdbp->Mode;
+ Cardinal = tdbp->Cardinal;
+ MaxSize = tdbp->MaxSize;
+ Read_Only = tdbp->IsReadOnly();
+ m_data_charset = tdbp->data_charset();
+ csname = tdbp->csname;
+} // end of TDB copy constructor
+
+// Methods
+/***********************************************************************/
+/* Return the pointer on the charset of this table. */
+/***********************************************************************/
+CHARSET_INFO *TDB::data_charset(void)
+{
+ // If no DATA_CHARSET is specified, we assume that character
+ // set of the remote data is the same with CHARACTER SET
+ // definition of the SQL column.
+ return m_data_charset ? m_data_charset : &my_charset_bin;
+} // end of data_charset
+
+/***********************************************************************/
+/* Return the datapath of the DB this table belongs to. */
+/***********************************************************************/
+PCSZ TDB::GetPath(void)
+{
+ return To_Def->GetPath();
+} // end of GetPath
+
+/***********************************************************************/
+/* Return true if name is a special column of this table. */
+/***********************************************************************/
+bool TDB::IsSpecial(PSZ name)
+{
+ for (PCOLDEF cdp = To_Def->GetCols(); cdp; cdp = cdp->GetNext())
+ if (!stricmp(cdp->GetName(), name) && (cdp->Flags & U_SPECIAL))
+ return true; // Special column to ignore while inserting
+
+ return false; // Not found or not special or not inserting
+} // end of IsSpecial
+
+/***********************************************************************/
+/* Initialize TDB based column description block construction. */
+/* name is used to call columns by name. */
+/* num is used by TBL to construct columns by index number. */
+/* Note: name=Null and num=0 for constructing all columns (select *) */
+/***********************************************************************/
+PCOL TDB::ColDB(PGLOBAL g, PSZ name, int num)
+{
+ int i;
+ PCOLDEF cdp;
+ PCOL cp, colp = NULL, cprec = NULL;
+
+ if (trace(1))
+ htrc("ColDB: am=%d colname=%s tabname=%s num=%d\n",
+ GetAmType(), SVP(name), Name, num);
+
+ for (cdp = To_Def->GetCols(), i = 1; cdp; cdp = cdp->GetNext(), i++)
+ if ((!name && !num) ||
+ (name && !stricmp(cdp->GetName(), name)) || num == i) {
+ /*****************************************************************/
+ /* Check for existence of desired column. */
+ /* Also find where to insert the new block. */
+ /*****************************************************************/
+ for (cp = Columns; cp; cp = cp->GetNext())
+ if ((num && cp->GetIndex() == i) ||
+ (name && !stricmp(cp->GetName(), name)))
+ break; // Found
+ else if (cp->GetIndex() < i)
+ cprec = cp;
+
+ if (trace(1))
+ htrc("cdp(%d).Name=%s cp=%p\n", i, cdp->GetName(), cp);
+
+ /*****************************************************************/
+ /* Now take care of Column Description Block. */
+ /*****************************************************************/
+ if (cp)
+ colp = cp;
+ else if (!(cdp->Flags & U_SPECIAL))
+ colp = MakeCol(g, cdp, cprec, i);
+ else if (Mode != MODE_INSERT)
+ colp = InsertSpcBlk(g, cdp);
+
+ if (trace(1))
+ htrc("colp=%p\n", colp);
+
+ if (name || num)
+ break;
+ else if (colp && !colp->IsSpecial())
+ cprec = colp;
+
+ } // endif Name
+
+ return (colp);
+} // end of ColDB
+
+/***********************************************************************/
+/* InsertSpecialColumn: Put a special column ahead of the column list.*/
+/***********************************************************************/
+PCOL TDB::InsertSpecialColumn(PCOL colp)
+{
+ if (!colp->IsSpecial())
+ return NULL;
+
+ colp->SetNext(Columns);
+ Columns = colp;
+ return colp;
+} // end of InsertSpecialColumn
+
+/***********************************************************************/
+/* Make a special COLBLK to insert in a table. */
+/***********************************************************************/
+PCOL TDB::InsertSpcBlk(PGLOBAL g, PCOLDEF cdp)
+{
+ //char *name = cdp->GetName();
+ char *name = cdp->GetFmt();
+ PCOLUMN cp;
+ PCOL colp;
+
+ cp = new(g)COLUMN(cdp->GetName());
+
+ if (!To_Table) {
+ strcpy(g->Message, "Cannot make special column: To_Table is NULL");
+ return NULL;
+ } else
+ cp->SetTo_Table(To_Table);
+
+ if (!stricmp(name, "FILEID") || !stricmp(name, "FDISK") ||
+ !stricmp(name, "FPATH") || !stricmp(name, "FNAME") ||
+ !stricmp(name, "FTYPE") || !stricmp(name, "SERVID")) {
+ if (!To_Def || !(To_Def->GetPseudo() & 2)) {
+ snprintf(g->Message, sizeof(g->Message), MSG(BAD_SPEC_COLUMN));
+ return NULL;
+ } // endif Pseudo
+
+ if (!stricmp(name, "FILEID"))
+ colp = new(g)FIDBLK(cp, OP_XX);
+ else if (!stricmp(name, "FDISK"))
+ colp = new(g)FIDBLK(cp, OP_FDISK);
+ else if (!stricmp(name, "FPATH"))
+ colp = new(g)FIDBLK(cp, OP_FPATH);
+ else if (!stricmp(name, "FNAME"))
+ colp = new(g)FIDBLK(cp, OP_FNAME);
+ else if (!stricmp(name, "FTYPE"))
+ colp = new(g)FIDBLK(cp, OP_FTYPE);
+ else
+ colp = new(g)SIDBLK(cp);
+
+ } else if (!stricmp(name, "TABID")) {
+ colp = new(g)TIDBLK(cp);
+ } else if (!stricmp(name, "PARTID")) {
+ colp = new(g)PRTBLK(cp);
+ //} else if (!stricmp(name, "CONID")) {
+ // colp = new(g) CIDBLK(cp);
+ } else if (!stricmp(name, "ROWID")) {
+ colp = new(g)RIDBLK(cp, false);
+ } else if (!stricmp(name, "ROWNUM")) {
+ colp = new(g)RIDBLK(cp, true);
+ } else {
+ snprintf(g->Message, sizeof(g->Message), MSG(BAD_SPECIAL_COL), name);
+ return NULL;
+ } // endif's name
+
+ if (!(colp = InsertSpecialColumn(colp))) {
+ snprintf(g->Message, sizeof(g->Message), MSG(BAD_SPECIAL_COL), name);
+ return NULL;
+ } // endif Insert
+
+ return (colp);
+} // end of InsertSpcBlk
+
+/***********************************************************************/
+/* Marks DOS/MAP table columns used in internal joins. */
+/* tdb2 is the top of tree or first tdb in chained tdb's and tdbp */
+/* points to the currently marked tdb. */
+/* Two questions here: exact meaning of U_J_INT ? */
+/* Why is the eventual reference to To_Key_Col not marked U_J_EXT ? */
+/***********************************************************************/
+void TDB::MarkDB(PGLOBAL, PTDB tdb2)
+{
+ if (trace(1))
+ htrc("DOS MarkDB: tdbp=%p tdb2=%p\n", this, tdb2);
+
+} // end of MarkDB
+
+/***********************************************************************/
+/* RowNumber: returns the current row ordinal number. */
+/***********************************************************************/
+int TDB::RowNumber(PGLOBAL g, bool)
+ {
+ snprintf(g->Message, sizeof(g->Message), MSG(ROWID_NOT_IMPL), GetAmName(g, GetAmType()));
+ return 0;
+ } // end of RowNumber
+
+PTDB TDB::Copy(PTABS t)
+ {
+ PTDB tp, tdb1, tdb2 = NULL, outp = NULL;
+//PGLOBAL g = t->G; // Is this really useful ???
+
+ for (tdb1 = this; tdb1; tdb1 = tdb1->Next) {
+ tp = tdb1->Clone(t);
+
+ if (!outp)
+ outp = tp;
+ else
+ tdb2->Next = tp;
+
+ tdb2 = tp;
+ NewPointer(t, tdb1, tdb2);
+ } // endfor tdb1
+
+ return outp;
+ } // end of Copy
+
+/***********************************************************************/
+/* SetRecpos: Replace the table at the specified position. */
+/***********************************************************************/
+bool TDB::SetRecpos(PGLOBAL g, int)
+{
+ strcpy(g->Message, MSG(SETRECPOS_NIY));
+ return true;
+} // end of SetRecpos
+
+void TDB::Printf(PGLOBAL g, FILE *f, uint n)
+ {
+ PCOL cp;
+ char m[64];
+
+ memset(m, ' ', n); // Make margin string
+ m[n] = '\0';
+
+ for (PTDB tp = this; tp; tp = tp->Next) {
+ fprintf(f, "%sTDB (%p) %s no=%d use=%d type=%d\n", m,
+ tp, tp->Name, tp->Tdb_No, tp->Use, tp->GetAmType());
+
+ tp->PrintAM(f, m);
+ fprintf(f, "%s Columns (deg=%d):\n", m, tp->Degree);
+
+ for (cp = tp->Columns; cp; cp = cp->GetNext())
+ cp->Printf(g, f, n);
+
+ } /* endfor tp */
+
+ } // end of Printf
+
+void TDB::Prints(PGLOBAL, char *ps, uint)
+ {
+ sprintf(ps, "R%d.%s", Tdb_No, Name);
+ } // end of Prints
+
+/* -------------------------- class TDBASE --------------------------- */
+
+/***********************************************************************/
+/* Implementation of the TDBASE class. This is the base class to all */
+/* classes for tables that can be joined together. */
+/***********************************************************************/
+TDBASE::TDBASE(PTABDEF tdp) : TDB(tdp)
+ {
+//To_Def = tdp;
+ To_Link = NULL;
+ To_Key_Col = NULL;
+ To_Kindex = NULL;
+ To_Xdp = NULL;
+//To_SetCols = NULL;
+ Ftype = RECFM_NAF;
+//MaxSize = -1;
+ Knum = 0;
+//Read_Only = (tdp) ? tdp->IsReadOnly() : false;
+//m_data_charset= (tdp) ? tdp->data_charset() : NULL;
+//csname = (tdp) ? tdp->csname : NULL;
+ } // end of TDBASE constructor
+
+TDBASE::TDBASE(PTDBASE tdbp) : TDB(tdbp)
+ {
+//To_Def = tdbp->To_Def;
+ To_Link = tdbp->To_Link;
+ To_Key_Col = tdbp->To_Key_Col;
+ To_Kindex = tdbp->To_Kindex;
+ To_Xdp = tdbp->To_Xdp;
+//To_SetCols = tdbp->To_SetCols; // ???
+ Ftype = tdbp->Ftype;
+//MaxSize = tdbp->MaxSize;
+ Knum = tdbp->Knum;
+//Read_Only = tdbp->Read_Only;
+//m_data_charset= tdbp->m_data_charset;
+//csname = tdbp->csname;
+ } // end of TDBASE copy constructor
+
+/***********************************************************************/
+/* Return the pointer on the DB catalog this table belongs to. */
+/***********************************************************************/
+PCATLG TDBASE::GetCat(void)
+ {
+ return (To_Def) ? To_Def->GetCat() : NULL;
+ } // end of GetCat
+
+#if 0
+/***********************************************************************/
+/* Return the pointer on the charset of this table. */
+/***********************************************************************/
+CHARSET_INFO *TDBASE::data_charset(void)
+ {
+ // If no DATA_CHARSET is specified, we assume that character
+ // set of the remote data is the same with CHARACTER SET
+ // definition of the SQL column.
+ return m_data_charset ? m_data_charset : &my_charset_bin;
+ } // end of data_charset
+
+/***********************************************************************/
+/* Return the datapath of the DB this table belongs to. */
+/***********************************************************************/
+PSZ TDBASE::GetPath(void)
+ {
+ return To_Def->GetPath();
+ } // end of GetPath
+
+/***********************************************************************/
+/* Return true if name is a special column of this table. */
+/***********************************************************************/
+bool TDBASE::IsSpecial(PSZ name)
+ {
+ for (PCOLDEF cdp = To_Def->GetCols(); cdp; cdp = cdp->GetNext())
+ if (!stricmp(cdp->GetName(), name) && (cdp->Flags & U_SPECIAL))
+ return true; // Special column to ignore while inserting
+
+ return false; // Not found or not special or not inserting
+ } // end of IsSpecial
+
+/***********************************************************************/
+/* Initialize TDBASE based column description block construction. */
+/* name is used to call columns by name. */
+/* num is used by TBL to construct columns by index number. */
+/* Note: name=Null and num=0 for constructing all columns (select *) */
+/***********************************************************************/
+PCOL TDBASE::ColDB(PGLOBAL g, PSZ name, int num)
+ {
+ int i;
+ PCOLDEF cdp;
+ PCOL cp, colp = NULL, cprec = NULL;
+
+ if (trace(1))
+ htrc("ColDB: am=%d colname=%s tabname=%s num=%d\n",
+ GetAmType(), SVP(name), Name, num);
+
+ for (cdp = To_Def->GetCols(), i = 1; cdp; cdp = cdp->GetNext(), i++)
+ if ((!name && !num) ||
+ (name && !stricmp(cdp->GetName(), name)) || num == i) {
+ /*****************************************************************/
+ /* Check for existence of desired column. */
+ /* Also find where to insert the new block. */
+ /*****************************************************************/
+ for (cp = Columns; cp; cp = cp->GetNext())
+ if ((num && cp->GetIndex() == i) ||
+ (name && !stricmp(cp->GetName(), name)))
+ break; // Found
+ else if (cp->GetIndex() < i)
+ cprec = cp;
+
+ if (trace(1))
+ htrc("cdp(%d).Name=%s cp=%p\n", i, cdp->GetName(), cp);
+
+ /*****************************************************************/
+ /* Now take care of Column Description Block. */
+ /*****************************************************************/
+ if (cp)
+ colp = cp;
+ else if (!(cdp->Flags & U_SPECIAL))
+ colp = MakeCol(g, cdp, cprec, i);
+ else if (Mode != MODE_INSERT)
+ colp = InsertSpcBlk(g, cdp);
+
+ if (trace(1))
+ htrc("colp=%p\n", colp);
+
+ if (name || num)
+ break;
+ else if (colp && !colp->IsSpecial())
+ cprec = colp;
+
+ } // endif Name
+
+ return (colp);
+ } // end of ColDB
+
+/***********************************************************************/
+/* InsertSpecialColumn: Put a special column ahead of the column list.*/
+/***********************************************************************/
+PCOL TDBASE::InsertSpecialColumn(PCOL colp)
+ {
+ if (!colp->IsSpecial())
+ return NULL;
+
+ colp->SetNext(Columns);
+ Columns = colp;
+ return colp;
+ } // end of InsertSpecialColumn
+
+/***********************************************************************/
+/* Make a special COLBLK to insert in a table. */
+/***********************************************************************/
+PCOL TDBASE::InsertSpcBlk(PGLOBAL g, PCOLDEF cdp)
+ {
+//char *name = cdp->GetName();
+ char *name = cdp->GetFmt();
+ PCOLUMN cp;
+ PCOL colp;
+
+ cp= new(g) COLUMN(cdp->GetName());
+
+ if (! To_Table) {
+ strcpy(g->Message, "Cannot make special column: To_Table is NULL");
+ return NULL;
+ } else
+ cp->SetTo_Table(To_Table);
+
+ if (!stricmp(name, "FILEID") || !stricmp(name, "FDISK") ||
+ !stricmp(name, "FPATH") || !stricmp(name, "FNAME") ||
+ !stricmp(name, "FTYPE") || !stricmp(name, "SERVID")) {
+ if (!To_Def || !(To_Def->GetPseudo() & 2)) {
+ snprintf(g->Message, sizeof(g->Message), MSG(BAD_SPEC_COLUMN));
+ return NULL;
+ } // endif Pseudo
+
+ if (!stricmp(name, "FILEID"))
+ colp = new(g) FIDBLK(cp, OP_XX);
+ else if (!stricmp(name, "FDISK"))
+ colp = new(g) FIDBLK(cp, OP_FDISK);
+ else if (!stricmp(name, "FPATH"))
+ colp = new(g) FIDBLK(cp, OP_FPATH);
+ else if (!stricmp(name, "FNAME"))
+ colp = new(g) FIDBLK(cp, OP_FNAME);
+ else if (!stricmp(name, "FTYPE"))
+ colp = new(g) FIDBLK(cp, OP_FTYPE);
+ else
+ colp = new(g) SIDBLK(cp);
+
+ } else if (!stricmp(name, "TABID")) {
+ colp = new(g) TIDBLK(cp);
+ } else if (!stricmp(name, "PARTID")) {
+ colp = new(g) PRTBLK(cp);
+//} else if (!stricmp(name, "CONID")) {
+// colp = new(g) CIDBLK(cp);
+ } else if (!stricmp(name, "ROWID")) {
+ colp = new(g) RIDBLK(cp, false);
+ } else if (!stricmp(name, "ROWNUM")) {
+ colp = new(g) RIDBLK(cp, true);
+ } else {
+ snprintf(g->Message, sizeof(g->Message), MSG(BAD_SPECIAL_COL), name);
+ return NULL;
+ } // endif's name
+
+ if (!(colp = InsertSpecialColumn(colp))) {
+ snprintf(g->Message, sizeof(g->Message), MSG(BAD_SPECIAL_COL), name);
+ return NULL;
+ } // endif Insert
+
+ return (colp);
+ } // end of InsertSpcBlk
+#endif // 0
+
+/***********************************************************************/
+/* ResetTableOpt: Wrong for this table type. */
+/***********************************************************************/
+int TDBASE::ResetTableOpt(PGLOBAL g, bool, bool)
+{
+ strcpy(g->Message, "This table is not indexable");
+ return RC_INFO;
+} // end of ResetTableOpt
+
+/***********************************************************************/
+/* ResetKindex: set or reset the index pointer. */
+/***********************************************************************/
+void TDBASE::ResetKindex(PGLOBAL g, PKXBASE kxp)
+ {
+ if (To_Kindex) {
+ int pos = GetRecpos(); // To be reset in Txfp
+
+ for (PCOL colp= Columns; colp; colp= colp->GetNext())
+ colp->SetKcol(NULL);
+
+ To_Kindex->Close(); // Discard old index
+ SetRecpos(g, pos); // Ignore return value
+ } // endif To_Kindex
+
+ To_Kindex = kxp;
+ } // end of ResetKindex
+
+#if 0
+/***********************************************************************/
+/* SetRecpos: Replace the table at the specified position. */
+/***********************************************************************/
+bool TDBASE::SetRecpos(PGLOBAL g, int)
+ {
+ strcpy(g->Message, MSG(SETRECPOS_NIY));
+ return true;
+ } // end of SetRecpos
+#endif // 0
+
+/***********************************************************************/
+/* Methods */
+/***********************************************************************/
+void TDBASE::PrintAM(FILE *f, char *m)
+ {
+ fprintf(f, "%s AM(%d): mode=%d\n", m, GetAmType(), Mode);
+ } // end of PrintAM
+
+#if 0
+/***********************************************************************/
+/* Marks DOS/MAP table columns used in internal joins. */
+/* tdb2 is the top of tree or first tdb in chained tdb's and tdbp */
+/* points to the currently marked tdb. */
+/* Two questions here: exact meaning of U_J_INT ? */
+/* Why is the eventual reference to To_Key_Col not marked U_J_EXT ? */
+/***********************************************************************/
+void TDBASE::MarkDB(PGLOBAL, PTDB tdb2)
+ {
+ if (trace(1))
+ htrc("DOS MarkDB: tdbp=%p tdb2=%p\n", this, tdb2);
+
+ } // end of MarkDB
+#endif // 0
+
+/* ---------------------------TDBCAT class --------------------------- */
+
+/***********************************************************************/
+/* Implementation of the TDBCAT class. */
+/***********************************************************************/
+TDBCAT::TDBCAT(PTABDEF tdp) : TDBASE(tdp)
+ {
+ Qrp = NULL;
+ Init = false;
+ N = -1;
+ } // end of TDBCAT constructor
+
+/***********************************************************************/
+/* Allocate CAT column description block. */
+/***********************************************************************/
+PCOL TDBCAT::MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n)
+ {
+ PCATCOL colp;
+
+ colp = (PCATCOL)new(g) CATCOL(cdp, this, n);
+
+ if (cprec) {
+ colp->SetNext(cprec->GetNext());
+ cprec->SetNext(colp);
+ } else {
+ colp->SetNext(Columns);
+ Columns = colp;
+ } // endif cprec
+
+ return colp;
+ } // end of MakeCol
+
+/***********************************************************************/
+/* Initialize: Get the result query block. */
+/***********************************************************************/
+bool TDBCAT::Initialize(PGLOBAL g)
+ {
+ if (Init)
+ return false;
+
+ if (!(Qrp = GetResult(g)))
+ return true;
+
+ if (Qrp->Truncated) {
+ snprintf(g->Message, sizeof(g->Message), "Result limited to %d lines", Qrp->Maxres);
+ PushWarning(g, this);
+ } // endif Truncated
+
+ if (Qrp->BadLines) {
+ snprintf(g->Message, sizeof(g->Message), "%d bad lines in result", Qrp->BadLines);
+ PushWarning(g, this);
+ } // endif Badlines
+
+ Init = true;
+ return false;
+ } // end of Initialize
+
+/***********************************************************************/
+/* CAT: Get the number of properties. */
+/***********************************************************************/
+int TDBCAT::GetMaxSize(PGLOBAL g __attribute__((unused)))
+ {
+ if (MaxSize < 0) {
+// if (Initialize(g))
+// return -1;
+
+// MaxSize = Qrp->Nblin;
+ MaxSize = 10; // To make MariaDB happy
+ } // endif MaxSize
+
+ return MaxSize;
+ } // end of GetMaxSize
+
+/***********************************************************************/
+/* CAT Access Method opening routine. */
+/***********************************************************************/
+bool TDBCAT::OpenDB(PGLOBAL g)
+ {
+ if (Use == USE_OPEN) {
+ /*******************************************************************/
+ /* Table already open. */
+ /*******************************************************************/
+ N = -1;
+ return false;
+ } // endif use
+
+ if (Mode != MODE_READ) {
+ /*******************************************************************/
+ /* ODBC Info tables cannot be modified. */
+ /*******************************************************************/
+ strcpy(g->Message, "CAT tables are read only");
+ return true;
+ } // endif Mode
+
+ /*********************************************************************/
+ /* Initialize the ODBC processing. */
+ /*********************************************************************/
+ if (Initialize(g))
+ return true;
+
+ Use = USE_OPEN;
+ return InitCol(g);
+ } // end of OpenDB
+
+/***********************************************************************/
+/* Initialize columns. */
+/***********************************************************************/
+bool TDBCAT::InitCol(PGLOBAL g)
+ {
+ PCATCOL colp;
+ PCOLRES crp;
+
+ for (colp = (PCATCOL)Columns; colp; colp = (PCATCOL)colp->GetNext()) {
+ for (crp = Qrp->Colresp; crp; crp = crp->Next)
+ if ((colp->Flag && colp->Flag == crp->Fld) ||
+ (!colp->Flag && !stricmp(colp->Name, crp->Name))) {
+ colp->Crp = crp;
+ break;
+ } // endif Flag
+
+
+ if (!colp->Crp /*&& !colp->GetValue()->IsConstant()*/) {
+ snprintf(g->Message, sizeof(g->Message), "Invalid flag %d for column %s",
+ colp->Flag, colp->Name);
+ return true;
+ } else if (crp->Fld == FLD_SCALE || crp->Fld == FLD_RADIX)
+ colp->Value->SetNullable(true);
+
+ } // endfor colp
+
+ return false;
+ } // end of InitCol
+
+/***********************************************************************/
+/* SetRecpos: Replace the table at the specified position. */
+/***********************************************************************/
+bool TDBCAT::SetRecpos(PGLOBAL, int recpos)
+ {
+ N = recpos - 1;
+ return false;
+ } // end of SetRecpos
+
+/***********************************************************************/
+/* Data Base read routine for CAT access method. */
+/***********************************************************************/
+int TDBCAT::ReadDB(PGLOBAL)
+ {
+ return (++N < Qrp->Nblin) ? RC_OK : RC_EF;
+ } // end of ReadDB
+
+/***********************************************************************/
+/* WriteDB: Data Base write routine for CAT access methods. */
+/***********************************************************************/
+int TDBCAT::WriteDB(PGLOBAL g)
+ {
+ strcpy(g->Message, "CAT tables are read only");
+ return RC_FX;
+ } // end of WriteDB
+
+/***********************************************************************/
+/* Data Base delete line routine for CAT access methods. */
+/***********************************************************************/
+int TDBCAT::DeleteDB(PGLOBAL g, int)
+ {
+ strcpy(g->Message, "Delete not enabled for CAT tables");
+ return RC_FX;
+ } // end of DeleteDB
+
+/***********************************************************************/
+/* Data Base close routine for WMI access method. */
+/***********************************************************************/
+void TDBCAT::CloseDB(PGLOBAL)
+ {
+ // Nothing to do
+ } // end of CloseDB
+
+// ------------------------ CATCOL functions ----------------------------
+
+/***********************************************************************/
+/* CATCOL public constructor. */
+/***********************************************************************/
+CATCOL::CATCOL(PCOLDEF cdp, PTDB tdbp, int n)
+ : COLBLK(cdp, tdbp, n)
+ {
+ Tdbp = (PTDBCAT)tdbp;
+ Crp = NULL;
+ Flag = cdp->GetOffset();
+ } // end of WMICOL constructor
+
+/***********************************************************************/
+/* Read the next Data Source elements. */
+/***********************************************************************/
+void CATCOL::ReadColumn(PGLOBAL)
+ {
+ bool b = (!Crp->Kdata || Crp->Kdata->IsNull(Tdbp->N));
+
+ // Get the value of the Name or Description property
+ if (!b)
+ Value->SetValue_pvblk(Crp->Kdata, Tdbp->N);
+ else
+ Value->Reset();
+
+ Value->SetNull(b);
+ } // end of ReadColumn
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 01:49:42 +0000