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/***************************************************************************
my_basics.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 the basic execution of SQL *
* statements using MySQL ODBC 3.51 driver *
* *
***************************************************************************/
#include "my_utility.h" /* MyODBC 3.51 sample utility header */
/********************************************************
* Execution of BASIC SQL statements *
*********************************************************/
void my_basics(SQLHDBC hdbc, SQLHSTMT hstmt)
{
SQLRETURN rc;
SQLINTEGER nRowCount;
printf("\nmy_basics:\n");
/* drop table 'myodbc3_demo_basic' if it already exists */
rc = SQLExecDirect(hstmt,"DROP TABLE if exists myodbc3_demo_basic",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_basic(\
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 3 rows of data */
rc = SQLExecDirect(hstmt,"INSERT INTO myodbc3_demo_basic values(\
1,'MySQL')",SQL_NTS);
mystmt(hstmt,rc);
rc = SQLExecDirect(hstmt,"INSERT INTO myodbc3_demo_basic values(\
2,'MyODBC')",SQL_NTS);
mystmt(hstmt,rc);
rc = SQLExecDirect(hstmt,"INSERT INTO myodbc3_demo_basic values(\
3,'monty')",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_basic set name=\
'MyODBC 3.51' where id=2",SQL_NTS);
mystmt(hstmt,rc);
/* get the rows affected by update statement */
rc = SQLRowCount(hstmt,&nRowCount);
mystmt(hstmt,rc);
printf(" total rows updated:%d",nRowCount);
/* commit the transaction */
rc = SQLEndTran(SQL_HANDLE_DBC, hdbc, SQL_COMMIT);
mycon(hdbc,rc);
/* delete third column */
rc = SQLExecDirect(hstmt,"DELETE FROM myodbc3_demo_basic where id = 3",SQL_NTS);
mystmt(hstmt,rc);
/* get the rows affected by delete statement */
rc = SQLRowCount(hstmt,&nRowCount);
mystmt(hstmt,rc);
printf(" total rows deleted:%d",nRowCount);
/* commit the transaction */
rc = SQLEndTran(SQL_HANDLE_DBC, hdbc, SQL_COMMIT);
mycon(hdbc,rc);
/* alter the table 'myodbc3_demo_basic' to 'myodbc3_new_name' */
rc = SQLExecDirect(hstmt,"ALTER TABLE myodbc3_demo_basic RENAME myodbc3_new_name",SQL_NTS);
mystmt(hstmt,rc);
/* commit the transaction */
rc = SQLEndTran(SQL_HANDLE_DBC, hdbc, SQL_COMMIT);
mycon(hdbc,rc);
/* drop the table with the original table name, and it should
return error saying 'table not found'
*/
rc = SQLExecDirect(hstmt,"DROP TABLE myodbc3_demo_basic",SQL_NTS);
mystmt_err(hstmt, rc == SQL_ERROR, rc);
/* now drop the table, which is altered..*/
rc = SQLExecDirect(hstmt,"DROP TABLE myodbc3_new_name",SQL_NTS);
mystmt(hstmt,rc);
/* commit the transaction */
rc = SQLEndTran(SQL_HANDLE_DBC, hdbc, SQL_COMMIT);
mycon(hdbc,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_basics [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 execution of SQL statements
*/
my_basics(hdbc, hstmt);
/*
* disconnect from the server, by freeing all resources
*/
mydisconnect(&henv,&hdbc,&hstmt);
return(0);
}
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