oraraw.cpp

在动态库中实现异步导出大数据量的oracle数据

#include "stdafx.h"

#define __OCICPP_INTERNAL_USE_

#include "OraRaw.h"

/*! \class OCICPP::OraRaw
  \brief Client-side representation of a raw data cell within the Oracle server
 */

OCICPP::OraRaw::OraRaw(OCIEnv *envhp,OCIError *errhp,OCIParam *paramd,ub2 type,int rows) : 
				OraType(envhp,errhp,paramd,type,rows),data(0)
{
	ub2 colSize;
	ReqType=SQLT_STR; /* Request a Null-terminating string for all types */
	CHECKERR(errhp,OCIAttrGet((dvoid *) paramd,OCI_DTYPE_PARAM,(dvoid *) &colSize,(ub4 *) 0,(ub4) OCI_ATTR_DATA_SIZE,errhp));
	size=(unsigned)(colSize*2); /* Because it return data is hex format */
	data=(char *)calloc((size+1)*nRows,sizeof(char));
	DEBUG(DLEV_DEBUG,"Size:%d\n",size);
}

OCICPP::OraRaw::~OraRaw() {
	free(data);
	OCIHandleFree(definehp,OCI_HTYPE_DEFINE);
}

void OCICPP::OraRaw::getStr(std::string &str,int row) {
	if(data) str.assign(data+(size+1)*row);
	else throw OraError("OCICPPLIB: Cannot getStr: Not fetched yet",OCICPPERROR);
}

void OCICPP::OraRaw::define(OCIStmt *stmt,int col) {
	 CHECKERR(err, OCIDefineByPos(stmt, &definehp, err, col+1, data, size+1,ReqType,
	                                (dvoid *) &null, 0, (ub2 *)0, OCI_DEFAULT));
}