用otl写的oracle取数工具，执行传入在查询语句，把结果输出到文件

项目中经常需要用到此类型的工具

 #pragma warning (disable:4786)
 #include <iostream>
 #include <map>
 #include <string>
 using namespace std;
 #include <stdio.h>
 #include <stdlib.h>
 #include <algorithm>
 #define OTL_ORA9I // Compile OTL 4.0/OCI9i
 #define OTL_STREAM_READ_ITERATOR_ON
 #define OTL_STL

 #ifdef WIN32
         #include <conio.h>
 #else
         //#define PASS_SECURITY
 #endif

 #ifdef PASS_SECURITY
         #include <pass_security/TDBCrypt.h> //包含密码解析头文件
 #else
         #define DB_ENV_LEN 100
 #endif

 #include "otlv4.h" // include the OTL 4 header file

 #define OTL_BUFFER_SIZE 2000 //otl缓冲行数
 #define BUFFER_SIZE 2000 //列内容缓冲

 int select(otl_connect& db, const string &sql, FILE *fp, const string &delemer = "|") //获得sql返回，并以|为分隔符输出到文件（第一行是列名）
 { 

         // create select stream
         otl_stream stream_i;
         //将输出类型全部转成string
         stream_i.set_all_column_types(otl_all_date2str | otl_all_num2str);

         stream_i.open(OTL_BUFFER_SIZE, // buffer size
                 sql.c_str(),
                 // SELECT statement
                 db // connect object
                 ); 

         //文件头
         int desc_len;
         otl_column_desc *desc = stream_i.describe_select(desc_len);
         for(int n = ; n < desc_len; ++n){
                 fprintf(fp, "%s%s", desc[n].name, delemer.c_str());
         }
         fprintf(fp, "\n");

         //文件内容
         string content;
         int row_count = ;

         while (!stream_i.eof())
         {
                 for(int n = ; n < desc_len; ++n){
                         stream_i >> content;
                         fprintf(fp, "%s%s", content.c_str(), delemer.c_str());
                 }
                 fprintf(fp, "\n");
                 row_count++;
         }

         cerr << row_count << " rows loaded " << endl;

         return ;
 }

 int get_passwd(string& io_dbname) //通过用户名获得 user/pass@database 形式字符串
 {

         if (string::npos != io_dbname.find("/"))
         {
                 return ;
         }

 #ifdef PASS_SECURITY
         std::string strDBConnect = io_dbname;

         char sDB[DB_ENV_LEN + ],sUSR[DB_ENV_LEN + ],sPWD[DB_ENV_LEN + ];
         security::TDBCrypt Crypt;
         int iresult = Crypt.init();
         if (iresult)
         {
                 cerr << "get passfile failed" << std::endl;
                 return ;
         }

         if (Crypt.fetchUserPwd(io_dbname.c_str(), sUSR, sPWD, sDB))
         {
                 io_dbname = "";
                 io_dbname = io_dbname + sUSR + "/" + sPWD + "@" + sDB;
                 return ;
         }
         else
         {
                 cerr << "get password failed" << std::endl;
                 return ;
         }
 #else

 #ifdef PASS_SECURITY
         size_t nDBpos = io_dbname.find("@");

         string sUSR = io_dbname.substr(, nDBpos);
         string sDB = io_dbname.substr(nDBpos + , io_dbname.length() - );
         char sPWD[DB_ENV_LEN + ] = "";

         cerr << "please input password of "<< io_dbname << " : " << std::endl;

         int ch;
         size_t i = ;
         while (((ch = getch()) != '\r') && i < DB_ENV_LEN)
         {
                 if (ch != '\b')
                 {
                         sPWD[i++] = (char) ch;
                         cerr << "*";
                 }
                 else
                 {
                         if (i >= )
                         {
                                 i--;
                                 cerr << "\b \b";
                         }
                         else
                         {
                                 cerr << "\007";
                         }
                 }
         }
         sPWD[i] = '\0';
         cerr << endl;

         io_dbname = sUSR + "/" + sPWD + "@" + sDB;
 #endif

 #endif

         return ;
 }

 int main(const int argc, const char * const argv[])
 {
         if (argc < )
         {
                 cerr << "参数错误！用法示例:\t" << endl;
                 cerr << "dtload user/pass@DB sql filename" << endl;
                 return ;
         }

         map<string, string> mpParam;
         for (int i = ; i < argc; i++)
         {
             if (*argv[i] == '-')
             {
                 if (i < argc)
                 {
                     mpParam[argv[i]] = argv[i + ];
                 }
                 else
                 {
                     mpParam[argv[i]] = "";
                 }
             }
         }

         otl_connect db;

         string dbname = argv[];
         string sql = argv[];
         string file = "";
         FILE *fp = NULL;

         //如果输出文件名为空，则输出到屏幕
         if (argc >= )
         {

                 file = argv[];
                 fp = fopen(file.c_str(), "w");

                 if (fp == NULL)
                 {
                         cerr << "openfile " << file << " err! maybe can not writed\n ";
                         return ;
                 }
         }
         else
         {
                 fp = stdout;
         }

         string delemer = "|";
         if (argc >= )
         {
                 delemer = argv[];
         }

         //如果输入参数不包含密码，则从dbfile里面找密码
         //get_passwd(dbname);

         otl_connect::otl_initialize(); // initialize OCI environment

         try
         {
                 db.rlogon(dbname.c_str()); // connect to Oracle
                 select(db, sql, fp, delemer); // select records from table
         }
         catch(const otl_exception& p)
         { // intercept OTL exceptions
                 cerr<<p.msg<<endl; // print out error message
                 cerr<<p.stm_text<<endl; // print out SQL that caused the error
                 cerr<<p.var_info<<endl; // print out the variable that caused the error
         }

         fclose(fp);
         db.logoff(); // disconnect from Oracle

 }

Makefile

 ## -*- Makefile -*-
 ## by hch

 top_srcdir      = ../

 DISPATCH = $(bindir)/Dispatch

 TARGETS    =    tbasload

 include $(top_srcdir)/MKFILE/Make.rules

 OBJS        = tbasload.o

 CPPFLAGS        := \
         $(ORACLE_INCLUDE) \
         -I. \
         $(CPPFLAGS)

 LDFLAGS        := \
         $(LDFLAGS) \
         $(ORACLE_LDFLAGS) 

 tbasload: $(OBJS)
     @echo "Creating executable -*- $@ -*- ..."
     @-rm -f $@
     @$(CXX) -o $@ $(LDFLAGS) $(ORACLE_LIBS) $^ 

Make.rules

 # -*-Make.rules-*-
 # by szh

 buildbits ?=
 debug ?= 

 STATICLIBS    = yes

 VERSION        = 1.0.
 SOVERSION    =
 ifeq ($(buildbits),)
     bindir        = $(top_srcdir)/bin
     libdir        = $(top_srcdir)/lib
 else
     bindir        = $(top_srcdir)/bin32
     libdir        = $(top_srcdir)/lib32
 endif
 includedir    = $(top_srcdir)/include/common

 UNAME                   := $(shell uname)

 include  $(top_srcdir)/MKFILE/Make.rules.$(UNAME)
 include  $(top_srcdir)/MKFILE/Make.rules.Customized

 CPPFLAGS    = -I$(includedir) $(ORACLE_INCLUDE)
 LDFLAGS        := $(LDFLAGS) $(CXXFLAGS) -L$(libdir)

 ifeq ($(mklibfilename),)
     mklibfilename       = $(if $(),lib$().so.$(),lib$().so)
 endif

 ifeq ($(mksoname),)
     mksoname            = $(if $(),lib$().so.$(),lib$().so)
 endif

 ifeq ($(mklibname),)
     ifeq ($(STATICLIBS),yes)
         mklibname       = lib$().a
     else
         mklibname       = lib$().so
     endif
 endif

 ifndef mklibtargets
     ifeq ($(STATICLIBS),yes)
         mklibtargets    = $()
     else
         mklibtargets    = $() $() $()
     endif
 endif

 ifeq ($(mkshlib),)
     $(error You need to define mkshlib in Make.rules.$(UNAME))
 endif

 EVERYTHING    =    all clean

 .SUFFIXES:

 %.o: %.cpp
     @echo "  $<"
     @$(CXX) -o $@ -c $(CPPFLAGS) $(CXXFLAGS) $<

 %.o: %.c
     @echo "  $<"
     @$(CC) -o $@ -c $(CPPFLAGS) $(CFLAGS) $<

 all:: warning $(SRCS) $(TARGETS)

 warning::
     @echo
     @echo "CONFIGURATION: buildbits=$(buildbits) debug=$(debug) STATICLIBS=$(STATICLIBS)"
     @echo 

 clean::
     @-rm -f $(TARGETS) $(OBJS)
     @-rm -f core *.o version.h