/***************************************************************************                          my_result.c  -  description                             ---------------------    begin                : Wed Sep 8 2001    copyright            : (C) MySQL AB 1995-2002, www.mysql.com    author               : venu ( venu@mysql.com ) ***************************************************************************//*************************************************************************** *                                                                         * *   This program is free software; you can redistribute it and/or modify  * *   it under the terms of the GNU General Public License as published by  * *   the Free Software Foundation; either version 2 of the License, or     * *   (at your option) any later version.                                   * *                                                                         * ***************************************************************************//*************************************************************************** *                                                                         * *  This is a basic sample to demonstrate how to get the resultset         * *  using  MySQL ODBC 3.51 driver                                          * *                                                                         * ***************************************************************************/#include "my_utility.h" /* MyODBC 3.51 sample utility header *//********************************************************* result set demo                                       **********************************************************/void my_resultset(SQLHDBC hdbc, SQLHSTMT hstmt){  SQLRETURN   rc;  SQLUINTEGER nRowCount=0, pcColDef;  SQLCHAR     szColName[MAX_NAME_LEN];  SQLCHAR     szData[MAX_COLUMNS][MAX_ROW_DATA_LEN]={0};  SQLSMALLINT nIndex,ncol,pfSqlType, pcbScale, pfNullable;  printf("\nmy_resultset:\n");    /* drop table 'myodbc3_demo_result' if it already exists */    rc = SQLExecDirect(hstmt,"DROP TABLE if exists myodbc3_demo_result",SQL_NTS);    mystmt(hstmt,rc);    /* commit the transaction */    rc = SQLEndTran(SQL_HANDLE_DBC, hdbc, SQL_COMMIT);     mycon(hdbc,rc);    /* create the table 'myodbc3_demo_result' */    rc = SQLExecDirect(hstmt,"CREATE TABLE myodbc3_demo_result(\                              id int primary key auto_increment,\                              name varchar(20))",SQL_NTS);    mystmt(hstmt,rc);    rc = SQLEndTran(SQL_HANDLE_DBC, hdbc, SQL_COMMIT);    mycon(hdbc,rc);        /* insert 2 rows of data */        rc = SQLExecDirect(hstmt,"INSERT INTO myodbc3_demo_result values(\                              1,'MySQL')",SQL_NTS);    mystmt(hstmt,rc);        rc = SQLExecDirect(hstmt,"INSERT INTO myodbc3_demo_result values(\                              2,'MyODBC')",SQL_NTS);    mystmt(hstmt,rc);    /* commit the transaction */    rc = SQLEndTran(SQL_HANDLE_DBC, hdbc, SQL_COMMIT);     mycon(hdbc,rc);    /* update second row */        rc = SQLExecDirect(hstmt,"UPDATE myodbc3_demo_result set name=\                              'MyODBC 3.51' where id=2",SQL_NTS);    mystmt(hstmt,rc);    /* commit the transaction */    rc = SQLEndTran(SQL_HANDLE_DBC, hdbc, SQL_COMMIT);     mycon(hdbc,rc);    /* now fetch back..*/       rc = SQLExecDirect(hstmt,"SELECT * from myodbc3_demo_result",SQL_NTS);    mystmt(hstmt,rc);    /* get total number of columns from the resultset */    rc = SQLNumResultCols(hstmt,&ncol);    mystmt(hstmt,rc);    printf(" total columns in resultset:%d\n\n",ncol);    /* print the column names  and do the row bind */    for(nIndex = 1; nIndex <= ncol; nIndex++)    {      rc = SQLDescribeCol(hstmt,nIndex,szColName, MAX_NAME_LEN+1, NULL,                          &pfSqlType,&pcColDef,&pcbScale,&pfNullable);      mystmt(hstmt,rc);      printf(" %s\t",szColName);      rc = SQLBindCol(hstmt,nIndex, SQL_C_CHAR, szData[nIndex-1],                      MAX_ROW_DATA_LEN+1,NULL);      mystmt(hstmt,rc);    }    printf("\n--------------------\n");    /* now fetch row by row */    rc = SQLFetch(hstmt);    while(rc == SQL_SUCCESS || rc == SQL_SUCCESS_WITH_INFO)    {       nRowCount++;       for(nIndex=0; nIndex< ncol; nIndex++)         printf(" %s\t",szData[nIndex]);            printf("\n");       rc = SQLFetch(hstmt);     }     SQLFreeStmt(hstmt,SQL_UNBIND);     printf("\n total rows fetched:%d\n",nRowCount);     /* free the statement row bind resources */     rc = SQLFreeStmt(hstmt, SQL_UNBIND);     mystmt(hstmt,rc);     /* free the statement cursor */     rc = SQLFreeStmt(hstmt, SQL_CLOSE);     mystmt(hstmt,rc);     printf(" success!!\n");}/********************************************************* main routine                                          **********************************************************/int main(int argc, char *argv[]){  SQLHENV    henv;  SQLHDBC    hdbc;   SQLHSTMT   hstmt;  SQLINTEGER narg;      /*     *  show the usage string when the user asks for this    */          printf("***********************************************\n");      printf("usage: my_result [DSN] [UID] [PWD] \n");        printf("***********************************************\n");          /*     * if connection string supplied through arguments, overrite     * the default one..    */    for(narg = 1; narg < argc; narg++)    {           if ( narg == 1 )        mydsn = argv[1];      else if ( narg == 2 )        myuid = argv[2];      else if ( narg == 3 )        mypwd = argv[3];          }       /*      * connect to MySQL server    */    myconnect(&henv,&hdbc,&hstmt);     /*      * simple resultset demo    */    my_resultset(hdbc, hstmt);    /*      * disconnect from the server, by freeing all resources    */    mydisconnect(&henv,&hdbc,&hstmt);  return(0);}