odbcselect4.c

b树实现源码,linux和unix下运行,速度快,极好用

// create table T1 witjh 10 fileds and insert rows in it.
// prepare statement with 5 fields. 
// use SQLNumResultCols() to get the nuber of fields in prepare statements.

// AUTHOR  :  Jitendra  Lenka

#include<stdio.h>
#include<stdlib.h>
#include<sql.h>
#include<sqlext.h>
#include<string.h>
    
//*************************************************************************

inline void checkrc(int rc,int line)
{
   if(rc)
   {
       printf("ERROR %d at line %d\n",rc,line);
       exit(1);
   }
}

//*************************************************************************
int  InsertTest(SQLHANDLE env,SQLHANDLE dbc,SQLHANDLE stmt)
{
         
      int ret;
      int f1=100; // f1 field
      short int f2=20;//f2 field
      char f3[50]= "Praba";
      float f4 = 2.5;
      float f5 = 10.50;
      char f6date[15]= "2008-01-12";// f6 field.DATE Field. yyyy-mm-dd
      char f7time[20] = "11:30:55";// hh:mm:ss
      char f8timestamp[50]= "2008-01-12 11:30:55"; //YYYY-MM-DD .....HH:MM:SS
      int  f9 = 5;
      long long f10 = 15000;
      int result;

      SQLINTEGER slen = SQL_NTS;
      //***********************************
      SQL_DATE_STRUCT date;
      char strDate[30];
      
      date.year=2008;
      date.month=03;
      date.day=18;
     // strcpy(strDate,"{d '2008-03-18'}");  
      //**********************************************
      SQL_TIME_STRUCT time;
      time.hour = 5;
      time.minute = 22;
      time.second = 10;
      //*********************************************
      SQL_TIMESTAMP_STRUCT timestamp;
      timestamp.year = 2008;
      timestamp.month = 03;
      timestamp.day = 18;
      timestamp.hour = 5;
      timestamp.minute = 22;
      timestamp.second = 10;
      timestamp.fraction = 764576; 
     //*********************************************
      ret = SQLPrepare(stmt,(unsigned char*)"INSERT INTO T1 VALUES(?,?,?,?,?,?,?,?,?,?)",SQL_NTS);
      checkrc(ret,__LINE__);

      // BIND PARAMETER

      ret = SQLBindParameter(stmt,1,SQL_PARAM_INPUT,SQL_C_SLONG,SQL_INTEGER,0,0,&f1,0,NULL);
      checkrc(ret,__LINE__);

      ret = SQLBindParameter(stmt,2,SQL_PARAM_INPUT,SQL_C_SSHORT,SQL_SMALLINT,0,0,&f2,0,NULL);
      checkrc(ret,__LINE__);

      ret = SQLBindParameter(stmt,3,SQL_PARAM_INPUT,SQL_C_CHAR,SQL_CHAR,196,0,(void*)f3,0,&slen);
      checkrc(ret,__LINE__);

      ret = SQLBindParameter(stmt,4,SQL_PARAM_INPUT,SQL_C_FLOAT,SQL_FLOAT,0,0,&f4,0,NULL);
      checkrc(ret,__LINE__);

      ret = SQLBindParameter(stmt,5,SQL_PARAM_INPUT,SQL_C_FLOAT,SQL_REAL,0,0,&f5,0,NULL);
      checkrc(ret,__LINE__);
   
      ret = SQLBindParameter(stmt,6,SQL_PARAM_INPUT,SQL_C_TYPE_DATE,SQL_TYPE_DATE,196,0,&date,sizeof(date),&slen);
      checkrc(ret,__LINE__);

      ret = SQLBindParameter(stmt,7,SQL_PARAM_INPUT,SQL_C_TYPE_TIME,SQL_TYPE_TIME,196,0,&time,sizeof(time),&slen);
      checkrc(ret,__LINE__);

     ret = SQLBindParameter(stmt,8,SQL_PARAM_INPUT,SQL_C_TYPE_TIMESTAMP,SQL_TYPE_TIMESTAMP,196,0,&timestamp,sizeof(timestamp),&slen);
      checkrc(ret,__LINE__);

      ret = SQLBindParameter(stmt,9,SQL_PARAM_INPUT,SQL_C_TINYINT,SQL_TINYINT,0,0,&f9,0,NULL);
      checkrc(ret,__LINE__);

      ret = SQLBindParameter(stmt,10,SQL_PARAM_INPUT,SQL_C_SBIGINT,SQL_BIGINT,0,0,&f10,0,NULL);
      checkrc(ret,__LINE__);

      int i,count=0;
      for(i=0;i<2;i++)
      {
       for(int j=0;j<5;j++)
       {
         f1= f1+i;
         f2++;
         f4++;
         ret = SQLExecute(stmt);
         checkrc(ret,__LINE__);
        
         ret = SQLTransact(env,dbc,SQL_COMMIT);
         checkrc(ret,__LINE__);
         count++;
      } 
     }  
    printf("Total row inserted=%d\n",count);
  }
//***********************************************************************
// FETCH ROWS FROM THE TABLE "T1"......select * from T1;
int FetchTest(SQLHANDLE env, SQLHANDLE dbc, SQLHANDLE stmt)
{
    
      int ret;
      int f1=100; // f1 field
      short int f2=20;//f2 field
      char f3[50]= "jitendra";
      float f4 = 2.5;
      float f5 = 10.50;
      //char f6date[15]= "2008-01-12";// f6 field.DATE Field. yyyy-mm-dd
      //char f7time[20] = "11:30:55";// hh:mm:ss
      //char f8timestamp[50]= "2008-01-12 11:30:55"; //YYYY-MM-DD .....HH:MM:SS
      int  f9 = 5;
      long long f10 = 15000;
      int result;


      SQL_DATE_STRUCT date;
      char strDate[30];

      date.year=2008;
      date.month=03;
      date.day=18;
     // strcpy(strDate,"{d '2008-03-18'}");
      //**********************************************
      SQL_TIME_STRUCT time;
      time.hour = 5;
      time.minute = 22;
      time.second = 10;
      //*********************************************
      SQL_TIMESTAMP_STRUCT timestamp;
      timestamp.year = 2008;
      timestamp.month = 03;
      timestamp.day = 18;
      timestamp.hour = 5;
      timestamp.minute = 22;
      timestamp.second = 10;
      timestamp.fraction = 764576;

     ret = SQLPrepare(stmt,(unsigned char*)"SELECT F8,F10,F2,F6,F3 FROM T1 WHERE F1=100 ",SQL_NTS);
     checkrc(ret,__LINE__);

     SQLSMALLINT noc;
    SQLNumResultCols(stmt,&noc);
    printf("SQLNumResultCols() returns=%d\n",noc);

 
  
    ret = SQLBindCol(stmt,1,SQL_C_TYPE_TIMESTAMP,&timestamp,sizeof(timestamp),NULL);
    checkrc(ret,__LINE__);

    ret = SQLBindCol(stmt,2,SQL_C_SBIGINT,&f10,0,NULL);
    checkrc(ret,__LINE__);

    ret = SQLBindCol(stmt,3,SQL_C_SSHORT,&f2,0,NULL);
    checkrc(ret,__LINE__);
    
     ret = SQLBindCol(stmt,4,SQL_C_TYPE_DATE,&date,sizeof(date),NULL);
     checkrc(ret,__LINE__);

     ret = SQLBindCol(stmt,5,SQL_C_CHAR,f3,sizeof(f3),NULL);
     checkrc(ret,__LINE__);
 
   
    int j, count=0;
    ret = SQLExecute(stmt);
    checkrc(ret,__LINE__);
    printf("SELECT F8,F10,F2,F6,F3 FROM T1 WHERE F1=100 :\n");
    
     
    while(SQL_SUCCEEDED(ret = SQLFetch(stmt)))
    {
        printf("F1=%d\tF2=%d\tF3=%s\tF4=%f\tF5=%f\tDATE=%d/%d/%d\tTIME=%d-%d-%d\tTIMESTAMP=%d/%d/%d %d-%d-%d\tF9=%d\tF10=%lld\n ",f1,f2,f3,f4,f5,date.year,date.month,date.day,time.hour,time.minute,time.second,timestamp.year,timestamp.month,timestamp.day,timestamp.hour,timestamp.minute,timestamp.second,f9,f10);

 
       count++;
           
    }
    
        
    ret = SQLCloseCursor(stmt);
    checkrc(ret,__LINE__);
    
    ret = SQLTransact(env,dbc,SQL_COMMIT);
    checkrc(ret,__LINE__);
    
    printf("Total row fetched=%d\n",count);
} 
 
 
int main()
{
  SQLHENV env;
  SQLHDBC dbc;
  SQLHSTMT stmt;
  SQLRETURN ret;
  SQLCHAR outstr[1024];
  SQLSMALLINT outstrlen;
  
  // Aloocate an environment handle
  ret=SQLAllocHandle(SQL_HANDLE_ENV,SQL_NULL_HANDLE,&env);
  checkrc(ret,__LINE__);
  
   //we need odbc3 support
   ret = SQLSetEnvAttr(env,SQL_ATTR_ODBC_VERSION,(void*)SQL_OV_ODBC3,0);
   checkrc(ret,__LINE__);
  //ALLOCATE A Connection handle
  ret = SQLAllocHandle(SQL_HANDLE_DBC,env,&dbc);
  checkrc(ret,__LINE__);
    
  // connect to the DSN mydsn
   ret = SQLConnect (dbc,
                   (SQLCHAR *) "test", (SQLSMALLINT) strlen ("test"),
                   (SQLCHAR *) "root",
                   (SQLSMALLINT) strlen ("root"),
                   (SQLCHAR *) "manager",
                   (SQLSMALLINT) strlen (""));

  if(SQL_SUCCEEDED(ret))
  {
     printf("\nConnected to the Data Source..\n");
       
     
  }
   else
   {
        printf("Error in conenction\n");
   
        ret = SQLFreeHandle(SQL_HANDLE_DBC,dbc);
        checkrc(ret,__LINE__);

        ret = SQLFreeHandle(SQL_HANDLE_ENV,env);
        checkrc(ret,__LINE__); 
        return 1;
   }

   
   //******************************************************************
   // TABLE CREATED
   ret = SQLAllocHandle(SQL_HANDLE_STMT,dbc,&stmt);
   checkrc(ret,__LINE__);
   
   SQLCHAR table[200]=
     "CREATE TABLE T1(F1 INT,F2 SMALLINT,F3 CHAR(30),F4 FLOAT,F5 FLOAT,F6 DATE,F7 TIME,F8 TIMESTAMP,F9 TINYINT,F10 BIGINT)";
   ret = SQLPrepare(stmt,table,SQL_NTS);
   checkrc(ret,__LINE__);
   
   ret = SQLExecute(stmt);
   checkrc(ret,__LINE__);
   printf("\nTABLE CREATED\n"); 
   //****************************************************************
   
   InsertTest(env,dbc,stmt);  
   //*****************************************************************

    FetchTest(env,dbc,stmt);

   //****************************************************************      
    SQLCHAR drop[100]="DROP TABLE T1";
    ret = SQLPrepare(stmt,drop,SQL_NTS);
    checkrc(ret,__LINE__);
    
    ret = SQLExecute(stmt);
    if(ret!=0)
       printf("Statement failed\n");
    else
       printf("Table dropped successfully\n");  
    checkrc(ret,__LINE__);
  
    ret = SQLFreeHandle(SQL_HANDLE_STMT,stmt);
    checkrc(ret,__LINE__);

   ret = SQLDisconnect(dbc);
   checkrc(ret,__LINE__);
   
   ret = SQLFreeHandle(SQL_HANDLE_DBC,dbc);
   checkrc(ret,__LINE__);
   
   ret = SQLFreeHandle(SQL_HANDLE_ENV,env);
   checkrc(ret,__LINE__);
   return 0;
}