/****************************************************************************
** (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: tbloadcursor.sqc
**
** SAMPLE: How to load data into a table using either the CURSOR or
** REMOTEFETCH media types.
** This sample program uses the following argument list:
**
** tbloadcursor [dbAlias1 [dbAlias2] [user1 pswd1 [user2 pswd2]]]
**
** - if dbAlias1 is not specified, a Load from CURSOR will be
** performed against database SAMPLE.
** - if dbAlias1 is specified but dbAlias2 is not, a Load from
** CURSOR will be performed against database dbAlias1.
** - if dbAlias1 and dbAlias2 are specified, a Load from
** REMOTEFETCH media will be performed against database dbAlias1
** by fetching from dbAlias2.
**
** NOTE: You must explicitly bind tbloadcursor.bnd against both
** databases (dbAlias1 and dbAlias2) when Load from REMOTEFETCH
** media is performed.
**
** DB2 API USED:
** db2Load -- Loads data into a DB2 table
**
** STRUCTURES USED:
** sqlca
**
*****************************************************************************
**
** For more information on the sample programs, see the README file.
**
** For information on developing embedded SQL applications see the Developing Embedded SQL Applications book.
**
** For information on using SQL statements, see the SQL Reference.
**
** For the latest information on programming, building, and running DB2
** applications, visit the DB2 application development website:
** http://publib.boulder.ibm.com/infocenter/db2luw/v9r7/index.jsp
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sqlenv.h>
#include <sqlutil.h>
#include <db2ApiDf.h>
#include "utilemb.h"
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
int CreateSourceTable();
int CreateTargetTable();
int DropSourceTable();
int DropTargetTable();
int InsertInitialValuesInSourceTable(void);
int LoadData(int bDoRemoteFetch,
char *pDBName_source,
char *pUserID_source,
char *pPasswd_source);
int DisplayTableContents(void);
EXEC SQL BEGIN DECLARE SECTION;
char strStmt[256];
short c1;
EXEC SQL END DECLARE SECTION;
int main(int argc, char *argv[])
{
int rc = 0;
int bDoRemoteFetch = FALSE;
char dbAlias_source[SQL_ALIAS_SZ + 1];
char user_source[USERID_SZ + 1];
char pswd_source[PSWD_SZ + 1];
char dbAlias_target[SQL_ALIAS_SZ + 1];
char user_target[USERID_SZ + 1];
char pswd_target[PSWD_SZ + 1];
/* check the command line arguments */
rc = CmdLineArgsCheck4(argc,
argv,
dbAlias_target,
dbAlias_source,
user_target,
pswd_target,
user_source,
pswd_source);
if (rc != 0)
{
return rc;
}
/* Deciding upon which method to be used : CURSOR or REMOTEFETCH media */
/* (if both dbAlias1 and db2Alias2 are specified, use REMOTEFETCH) */
bDoRemoteFetch = (argc == 3 || argc >= 5) ? TRUE : FALSE;
if (bDoRemoteFetch)
printf("\n THIS SAMPLE SHOWS HOW TO LOAD USING REMOTEFETCH MEDIA TYPE \n");
else
printf("\n THIS SAMPLE SHOWS HOW TO LOAD USING THE CURSOR MEDIA TYPE \n");
/* User/Password must be specified for REMOTEFETCH */
if (bDoRemoteFetch &&
(strlen(user_target)==0 ||
strlen(pswd_target)==0))
{
printf("\n (error: userid & password must be provided for REMOTEFETCH media type)");
return -1;
}
/* Create SOURCE table */
if (bDoRemoteFetch)
rc = DbConn(dbAlias_source, user_source, pswd_source);
else
rc = DbConn(dbAlias_target, user_target, pswd_target);
if (rc != 0)
{
return rc;
}
(void) CreateSourceTable();
(void) InsertInitialValuesInSourceTable();
/* Create TARGET table */
if (bDoRemoteFetch)
{
rc = DbDisconn(dbAlias_source);
if (rc != 0)
{
return rc;
}
rc = DbConn(dbAlias_target, user_target, pswd_target);
if (rc != 0)
{
return rc;
}
}
(void) CreateTargetTable();
/* Perform the Load on TARGET DATABASE */
(void) LoadData(bDoRemoteFetch, dbAlias_source, user_source, pswd_source);
/* Drop table on TARGET DATABASE */
(void) DropTargetTable();
/* Drop table on SOURCE DATABASE */
if (bDoRemoteFetch)
{
rc = DbDisconn(dbAlias_target);
if (rc != 0)
{
return rc;
}
rc = DbConn(dbAlias_source, user_source, pswd_source);
if (rc != 0)
{
return rc;
}
}
(void) DropSourceTable();
/* Disconnect */
rc = DbDisconn(dbAlias_source);
if (rc != 0)
{
return rc;
}
return 0;
} /* end main */
/*�This function creates a table MYSCHEMA1.SOURCE1 */
int CreateSourceTable(void)
{
struct sqlca sqlca;
/* create a new table 'MYSCHEMA1.SOURCE1' */
printf("\n CREATE A NEW TABLE 'MYSCHEMA1.SOURCE1' BY INVOKING THE STATEMENT:"
"\n -----------------------------------------------------------------"
"\n CREATE TABLE MYSCHEMA1.SOURCE1 (c1 integer not null)\n\n");
EXEC SQL CREATE TABLE MYSCHEMA1.SOURCE1 (
C1 INTEGER NOT NULL);
EMB_SQL_CHECK("new table -- create");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
return 0;
}
/*�This function creates a tables MYSCHEMA1.TARGET1 */
int CreateTargetTable()
{
struct sqlca sqlca;
/* create a new table 'MYSCHEAM1.TARGET1' */
printf("\n CREATE A NEW TABLE 'MYSCHEMA1.TARGET1' BY INVOKING THE STATEMENT:"
"\n -----------------------------------------------------------------"
"\n CREATE TABLE MYSCHEMA1.TARGET1 (c1 integer not null)\n");
EXEC SQL CREATE TABLE MYSCHEMA1.TARGET1 (
C1 INTEGER NOT NULL);
EMB_SQL_CHECK("new table -- create");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
return 0;
}
/* This function inserts some values directly into table MYSCHEMA.SOURCE1 */
int InsertInitialValuesInSourceTable(void)
{
struct sqlca sqlca;
printf(" INSERT INITIAL VALUES INTO TABLE MYSCHEMA1.SOURCE1 BY INVOKING\n"
" THE STATEMENT:\n"
" ----------------------------------------------------------------\n"
" INSERT INTO MYSCHEMA1.SOURCE1 VALUES (1), (2), (3), (4), (5)\n");
/* Insert initial values into table MYSCHEMA1.SOURCE1 */
strcpy(strStmt,
"INSERT INTO MYSCHEMA1.SOURCE1 VALUES (1), (2), (3), (4), (5)");
EXEC SQL EXECUTE IMMEDIATE :strStmt;
EMB_SQL_CHECK("insert -- MYSCHEMA1.SOURCE1");
EXEC SQL COMMIT;
EMB_SQL_CHECK("commit");
return 0;
}
/* This function demonstrates how to load data using the remotefetch media */
/* type using the db2Load API */
int LoadData(int bDoRemoteFetch,
char *pDBName_source,
char *pUserID_source,
char *pPasswd_source)
{
struct sqlca sqlca;
/* Statement�for CURSOR or REMOTEFETCH media */
char *pSourceStatement = "select * from MYSCHEMA1.SOURCE1";
char actionString[256];
/* Declare the input and output structures needed to call the
db2Load API */
struct db2LoadStruct paramStruct;
struct db2LoadIn inputInfoStruct;
struct db2LoadOut outputInfoStruct;
struct sqlu_media_list mediaList;
union sqlu_media_list_targets mediaListTargets;
struct sqlu_statement_entry statementEntry;
struct sqlu_remotefetch_entry remotefetchEntry;
struct sqlchar *pAction;
char localMsgFileName[128];
/* Initialize the members of the structures to NULL or zero */
memset(¶mStruct, 0, sizeof(paramStruct));
memset(&mediaList, 0, sizeof(mediaList));
memset(&outputInfoStruct, 0, sizeof(outputInfoStruct));
memset(&inputInfoStruct, 0, sizeof(inputInfoStruct));
memset(&mediaListTargets, 0, sizeof(mediaListTargets));
memset(&statementEntry, 0, sizeof(statementEntry));
memset(&remotefetchEntry, 0, sizeof(remotefetchEntry));
printf(
"\n INITIALIZE LOAD API STRUCTURES AND INVOKE THE LOAD API"
"\n ------------------------------------------------------"
"\n CREATE db2LoadStruct, db2LoadIn, db2LoadOut, "
"\n paramStruct, inputInfoStruct, and outputInfoStruct RESPECTIVELY AND"
"\n INITIALIZE THEIR MEMBERS TO ZERO OR NULL.\n");
printf(
"\n CREATE sqlu_media_list, mediaList, remotefetchEntry or statementEntry,"
"\n sqlu_media_list_targets UNION, and mediaListTargets. INITIALIZE THEIR"
"\n MEMBERS TO ZERO OR NULL.\n");
/* Setup the input information structure */
printf("\n SET UP THE db2LoadIn STRUCTURE 'inputInfoStruct'.\n");
inputInfoStruct.iRestartphase = ' ';
inputInfoStruct.iStatsOpt = SQLU_STATS_NONE;
inputInfoStruct.iIndexingMode = SQLU_INX_AUTOSELECT;
inputInfoStruct.iNonrecoverable = SQLU_NON_RECOVERABLE_LOAD;
inputInfoStruct.iAccessLevel = SQLU_ALLOW_NO_ACCESS;
inputInfoStruct.iLockWithForce = SQLU_NO_FORCE;
/* From V9.0 onwards, the structure member iCheckPending is */
/* deprecated and replaced with iSetIntegrityPending. Also the */
/* possible value to set this variable SQLU_CHECK_PENDING_CASCADE_DEFERRED */
/* has been replaced with SQLU_SI_PENDING_CASCADE_DEFERRED. */
inputInfoStruct.iSetIntegrityPending = SQLU_SI_PENDING_CASCADE_DEFERRED;
if (bDoRemoteFetch)
{
/* Setup the REMOTEFETCH media */
printf("\n SET UP remotefetchEntry, mediaListTargets, mediaList AND"
"\n paramStruct.\n");
remotefetchEntry.pDatabaseName = pDBName_source;
remotefetchEntry.iDatabaseNameLen = strlen(pDBName_source);
if (strlen(pUserID_source) != 0)
{
remotefetchEntry.pUserID = pUserID_source;
remotefetchEntry.iUserIDLen = strlen(pUserID_source);
}
if (strlen(pPasswd_source) != 0)
{
remotefetchEntry.pPassword = pPasswd_source;
remotefetchEntry.iPasswordLen = strlen(pPasswd_source);
}
remotefetchEntry.pStatement = pSourceStatement;
remotefetchEntry.iStatementLen = strlen(pSourceStatement);
mediaListTargets.pRemoteFetch = &remotefetchEntry;
mediaList.media_type = SQLU_REMOTEFETCH;
}
else
{
/* Setup the CURSOR media */
printf("\n SET UP statementEntry, mediaListTargets, mediaList AND"
"\n paramStruct.\n");
statementEntry.pEntry = pSourceStatement;
statementEntry.length = strlen(pSourceStatement);
mediaListTargets.pStatement = &statementEntry;
mediaList.media_type = SQLU_SQL_STMT;
}
mediaList.sessions = 1;
mediaList.target = mediaListTargets;
/* Setup action string */
strcpy(actionString, "REPLACE INTO MYSCHEMA1.TARGET1");
pAction = (struct sqlchar *)malloc(sizeof(short) +
sizeof(actionString) + 1);
pAction->length = strlen(actionString);
strcpy(pAction->data, actionString);
/* Setup the parameter structure */
paramStruct.piSourceList = &mediaList;
paramStruct.piActionString = pAction;
paramStruct.piFileType = SQL_CURSOR;
strcpy(localMsgFileName, "tbloadcursor.MSG");
paramStruct.piLocalMsgFileName = localMsgFileName;
paramStruct.piLoadInfoIn = &inputInfoStruct;
paramStruct.poLoadInfoOut = &outputInfoStruct;
paramStruct.iCallerAction = SQLU_INITIAL;
/* load data into the 'MYSCHEMA1.TARGET1' table by calling the db2Load API */
printf("\n CALL THE DB2 API db2Load()\n");
db2Load (db2Version970, ¶mStruct, &sqlca);
DB2_API_CHECK("table -- load");
/* free memory allocated */
free(pAction);
/* Display the contents of table 'MYSCHEMA1.TARGET1' after loading data into it */
printf(
"\n DISPLAY THE CONTENTS OF TABLE 'MYSCHEMA1.TARGET1' AFTER DATA IS LOADED INTO IT"
"\n ------------------------------------------------------------------------------\n");
DisplayTableContents();
return 0;
}
/* This function displays the contents of the MYSCHEMA1.TARGET1 table */
int DisplayTableContents()
{
struct sqlca sqlca;
char *selectstmt = "SELECT * FROM MYSCHEMA1.TARGET1";
printf(" %s\n\n", selectstmt);
printf(" C1\n");
printf(" ---\n");
/* Declare a CURSOR to store the results of the query specified by
'selectstmt' */
strcpy(strStmt,
selectstmt);
EXEC SQL PREPARE S1 FROM :strStmt;
EMB_SQL_CHECK("after prepare");
EXEC SQL DECLARE c1 CURSOR FOR s1;
EMB_SQL_CHECK("declare cursor");
EXEC SQL OPEN c1;
EMB_SQL_CHECK("cursor -- open");
/* Retrieve and display the results of the query */
EXEC SQL FETCH c1 INTO :c1;
EMB_SQL_CHECK("cursor -- fetch");
while (sqlca.sqlcode != 100)
{
printf(" %3d\n", c1);
EXEC SQL FETCH c1 INTO :c1;
EMB_SQL_CHECK("cursor -- fetch");
}
EXEC SQL CLOSE c1;
EMB_SQL_CHECK("cursor -- close");
return 0;
}
/*�This function drops table MYSCHEMA1.SOURCE1 */
int DropSourceTable()
{
int rc = 0;
struct sqlca sqlca;
/* drop the table 'MYSCHEMA1.SOURCE1'*/
printf("\n DROP TABLE MYSCHEMA1.SOURCE1\n");
EXEC SQL DROP TABLE MYSCHEMA1.SOURCE1;
EMB_SQL_CHECK("table MYSCHEMA1.SOURCE1 -- drop");
return 0;
}
/*�This function drops table MYSCHEMA1.SOURCE1 */
int DropTargetTable()
{
int rc = 0;
struct sqlca sqlca;
/* drop the table 'MYSCHEMA1.TARGET1'*/
printf("\n DROP TABLE MYSCHEMA1.TARGET1\n");
EXEC SQL DROP TABLE MYSCHEMA1.TARGET1;
EMB_SQL_CHECK("table MYSCHEMA1.TARGET1 -- drop");
return 0;
}