/****************************************************************************
** (c) Copyright IBM Corp. 2007 All rights reserved.
**
** The following sample of source code ("Sample") is owned by International
** Business Machines Corporation or one of its subsidiaries ("IBM") and is
** copyrighted and licensed, not sold. You may use, copy, modify, and
** distribute the Sample in any form without payment to IBM, for the purpose of
** assisting you in the development of your applications.
**
** The Sample code is provided to you on an "AS IS" basis, without warranty of
** any kind. IBM HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR
** IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do
** not allow for the exclusion or limitation of implied warranties, so the above
** limitations or exclusions may not apply to you. IBM shall not be liable for
** any damages you suffer as a result of using, copying, modifying or
** distributing the Sample, even if IBM has been advised of the possibility of
** such damages.
*****************************************************************************
**
** SOURCE FILE NAME: clisqlca.c
**
** SAMPLE: How to retrieve SQLCA-equivalent information
**
** Before running this sample, issue the following commands at the
** command line processor to ensure accurate statistics are returned:
**
** (1) db2start
** (2) db2 connect to sample
** (3) db2 runstats on table <instance>.org with distribution
** and indexes all
** where <instance> is the name of your database instance
**
** CLI FUNCTIONS USED:
** SQLAllocHandle -- Allocate Handle
** SQLConnect -- Connect to a Data Source
** SQLDisconnect -- Disconnect to a Data Source
** SQLExecute -- Execute a Statement
** SQLFreeHandle -- Free Handle Resources
** SQLGetDiagField -- Get a Field of Diagnostic Data
** SQLPrepare -- Prepare a Statement
** SQLSetConnectAttr -- Set Connection Attributes
** SQLSetStmtAttr -- Set Options Related to a Statement
**
**
*****************************************************************************
**
** For more information on the sample programs, see the README file.
**
** For information on developing CLI applications, see the CLI Guide
** and Reference.
**
** For information on using SQL statements, see the SQL Reference.
**
** For the latest information on programming, building, and running DB2
** applications, visit the DB2 Information Center:
** http://publib.boulder.ibm.com/infocenter/db2luw/v9r7/index.jsp
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sqlcli1.h>
#include "utilcli.h" /* Header file for CLI sample code */
int main(int argc, char *argv[])
{
SQLRETURN cliRC = SQL_SUCCESS;
int rc = 0;
SQLHANDLE henv; /* environment handle */
SQLHANDLE hdbc; /* connection handle */
SQLHANDLE hstmt; /* statement handle */
SQLCHAR *stmt1 = (SQLCHAR *)"SELECT * FROM org";
SQLINTEGER diagPtr;
SQLSMALLINT strLenPtr;
char dbAlias[SQL_MAX_DSN_LENGTH + 1];
char user[MAX_UID_LENGTH + 1];
char pswd[MAX_PWD_LENGTH + 1];
/* check the command line arguments */
rc = CmdLineArgsCheck1(argc, argv, dbAlias, user, pswd);
if (rc != 0)
{
return rc;
}
printf("\nTHIS SAMPLE SHOWS HOW TO RETRIEVE SQLCA-EQUIVALENT INFORMATION.\n");
printf("\n-----------------------------------------------------------");
printf("\nUSE THE CLI FUNCTIONS\n");
printf(" SQLAllocHandle\n");
printf(" SQLSetConnectAttr\n");
printf(" SQLConnect\n");
printf(" SQLSetStmtAttr\n");
printf(" SQLPrepare\n");
printf(" SQLExecute\n");
printf(" SQLGetDiagField\n");
printf(" SQLDisconnect\n");
printf(" SQLFreeHandle\n");
printf("TO SHOW HOW TO RETRIEVE INFORMATION EQUIVALENT TO SQLERRD(3) and SQLERRD(4):\n");
/* allocate an environment handle */
cliRC = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);
if (cliRC != SQL_SUCCESS)
{
printf("\n--ERROR while allocating the environment handle.\n");
printf(" cliRC = %d\n", cliRC);
printf(" line = %d\n", __LINE__);
printf(" file = %s\n", __FILE__);
return 1;
}
/* set attribute to enable application to run as ODBC 3.0 application */
cliRC = SQLSetEnvAttr(henv,
SQL_ATTR_ODBC_VERSION,
(void *)SQL_OV_ODBC3,
0);
ENV_HANDLE_CHECK(henv, cliRC);
/* allocate a database connection handle */
cliRC = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc);
ENV_HANDLE_CHECK(henv, cliRC);
/* set AUTOCOMMIT on */
cliRC = SQLSetConnectAttr(hdbc,
SQL_ATTR_AUTOCOMMIT,
(SQLPOINTER)SQL_AUTOCOMMIT_ON,
SQL_NTS);
DBC_HANDLE_CHECK(hdbc, cliRC);
printf("\n Connecting to the database %s...\n", dbAlias);
/* connect to the database */
cliRC = SQLConnect(hdbc,
(SQLCHAR *)dbAlias,
SQL_NTS,
(SQLCHAR *)user,
SQL_NTS,
(SQLCHAR *)pswd,
SQL_NTS);
DBC_HANDLE_CHECK(hdbc, cliRC);
printf(" Connected to the database %s.\n", dbAlias);
/* allocate a statement handle */
cliRC = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt);
DBC_HANDLE_CHECK(hdbc, cliRC);
printf("\n Disable deferred prepare.\n");
/* disable deferred prepare */
cliRC = SQLSetStmtAttr(hstmt,
SQL_ATTR_DEFERRED_PREPARE,
(SQLPOINTER)SQL_DEFERRED_PREPARE_OFF,
0);
STMT_HANDLE_CHECK(hstmt, hdbc, cliRC);
/* set the cursor type to use */
cliRC = SQLSetStmtAttr (hstmt,
SQL_ATTR_CURSOR_TYPE,
(SQLPOINTER) SQL_CURSOR_STATIC,
0);
/********* Start using the statement handle *******************/
printf("\n Prepare the statement\n");
printf(" %s\n", stmt1);
/* prepare the statement */
cliRC = SQLPrepare(hstmt, stmt1, SQL_NTS);
STMT_HANDLE_CHECK(hstmt, hdbc, cliRC);
/* execute the statement */
/*cliRC = SQLExecute(hstmt);
STMT_HANDLE_CHECK(hstmt, hdbc, cliRC);*/
printf("\n Call SQLGetDiagField to retrieve sqlerrd(3):\n");
/* get the SQLCA-equivalent information - sqlerrd(3)*/
cliRC = SQLGetDiagField (SQL_HANDLE_STMT,
hstmt,
0,
SQL_DIAG_CURSOR_ROW_COUNT,
&diagPtr,
SQL_IS_INTEGER,
&strLenPtr);
STMT_HANDLE_CHECK(hstmt, hdbc, cliRC);
printf(" Estimated number of rows that are returned: %d\n", diagPtr);
printf("\n Call SQLGetDiagField to retrieve sqlerrd(4):\n");
/* get the SQLCA-equivalent information - sqlerrd(4)*/
cliRC = SQLGetDiagField (SQL_HANDLE_STMT,
hstmt,
0,
SQL_DIAG_RELATIVE_COST_ESTIMATE,
&diagPtr,
SQL_IS_INTEGER,
&strLenPtr);
STMT_HANDLE_CHECK(hstmt, hdbc, cliRC);
printf(" Estimated cost of prepare: %d\n", diagPtr);
/********* Stop using the statement handles ********************/
/* free the statement handle */
cliRC = SQLFreeHandle(SQL_HANDLE_STMT, hstmt);
STMT_HANDLE_CHECK(hstmt, hdbc, cliRC);
printf("\n Disconnecting from the database %s...\n", dbAlias);
/* disconnect from the database */
cliRC = SQLDisconnect(hdbc);
DBC_HANDLE_CHECK(hdbc, cliRC);
printf(" Disconnected from the database %s.\n", dbAlias);
/* free the connection handle */
cliRC = SQLFreeHandle(SQL_HANDLE_DBC, hdbc);
DBC_HANDLE_CHECK(hdbc, cliRC);
/* free the environment handle */
cliRC = SQLFreeHandle(SQL_HANDLE_ENV, henv);
ENV_HANDLE_CHECK(henv, cliRC);
return 0;
} /* main */