本文整理汇总了C++中PVAL::GetCharString方法的典型用法代码示例。如果您正苦于以下问题：C++ PVAL::GetCharString方法的具体用法？C++ PVAL::GetCharString怎么用？C++ PVAL::GetCharString使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PVAL的用法示例。
在下文中一共展示了PVAL::GetCharString方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: MakePivotColumns
//.........这里部分代码省略.........
} else
pcrp = &crp->Next;
if (!Rblkp) {
strcpy(g->Message, MSG(NO_DEF_PIVOTCOL));
goto err;
} else if (!fncrp) {
strcpy(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))
return NULL;
Offset.Size = (nblin + 1) * sizeof(int);
Offset.Sub = TRUE; // Should be small enough
if (!PlgDBalloc(g, NULL, Offset))
return NULL;
ndif = Qsort(g, nblin);
if (ndif < 0) // error
return NULL;
} else {
// The query was limited, we must get pivot column values
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())))
return NULL;
// 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 = (char*)PlugSubAlloc(g, NULL, strlen(colname) + 1);
strcpy(crp->Name, 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;
err:
if (b)
Myc.Close();
return NULL;
} // end of MakePivotColumns