/**************************************************************************** ** (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: dynamic.sqc ** ** SAMPLE: To call the CREATE_DEPT_TABLE SQL procedure ** ** There are two parts to this program: ** 1. the dynamic executable (placed on the client) ** 2. the CREATE_DEPT_TABLE SQL procedure (created on the ** server with the dynamic.db2 CLP script) ** ** dynamic calls the CREATE_DEPT_TABLE SQL procedure by preparing ** and executing a dynamic CALL statement: ** ** sprintf(callstmt, "CALL %s (?,?)", procname); ** EXEC SQL prepare st from :callstmt; ** EXEC SQL execute st INTO :table_name:tableind USING :deptnum:deptind; ** ** When the CALL with Host Variable is used, ** the precompiler allocates and initializes an internal one ** variable SQLDA for both input and output. ** ** The CREATE_DEPT_TABLE procedure uses dynamic DDL to create ** a new table. The name of the table is based on the value ** of the IN parameter to the procedure. ** ** SQL STATEMENTS USED: ** CONNECT ** CALL ** PREPARE ** DECLARE CURSOR ** OPEN ** FETCH ** CLOSE ** ** ***************************************************************************** ** ** For more information on the sample programs, see the README file. ** ** For information on creating SQL procedures and developing C applications, ** see the Developing SQL and External Routines 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 Information Center: ** http://publib.boulder.ibm.com/infocenter/db2luw/v9r7/index.jsp ****************************************************************************/ #include <stdio.h> #include <stdlib.h> #include <sql.h> #include <sqlda.h> #include <sqlca.h> #include <string.h> #include "utilemb.h" int main(int argc, char *argv[]) { EXEC SQL BEGIN DECLARE SECTION; char database[9]; char userid[9]; char passwd[19]; char stmt[200]; char s1[200]; /* Declare a Local Variable for Holding the Procedure's Name */ char procname[254] = "CREATE_DEPT_TABLE"; /* Declare a statement string to call the procedure dynamically */ char callstmt[1200]; /* Declare Local Variables for Passing Data to SQL Procedure */ char deptnum[4]; sqlint16 deptind = 0; /* IN parameter */ char table_name[31]; sqlint16 tableind = -1; /* OUT parameter */ /* Declare Local Variables for Returning Data from New Table */ sqlint16 numrows = 0; EXEC SQL END DECLARE SECTION; /* Declare the output SQLDA */ struct sqlda *inout_sqlda = (struct sqlda *) malloc(SQLDASIZE(2)); /* Declare the SQLCA */ struct sqlca sqlca; char eBuffer[1024]; /* error message buffer */ if (argc != 4) { printf ("\nUSAGE: dynamic remote_database userid passwd\n\n"); return 1; } strcpy (database, argv[1]); strcpy (userid, argv[2]); strcpy (passwd, argv[3]); /* Connect to Remote Database */ printf("CONNECT TO Remote Database.\n"); EXEC SQL CONNECT TO :database USER :userid USING :passwd; EMB_SQL_CHECK("CONNECT TO RSAMPLE"); /********************************************************\ * Call the Remote Procedure via CALL with Host Variables * \********************************************************/ strcpy (deptnum, "D11"); printf("Use CALL with Host Variables to invoke the Server Procedure " "named %s\n", procname); sprintf(callstmt, "CALL %s (?,?)", procname); EXEC SQL prepare st from :callstmt; EMB_SQL_CHECK("PREPARE CALL STATEMENT"); EXEC SQL execute st INTO :table_name:tableind USING :deptnum:deptind; EMB_SQL_CHECK("EXECUTE CALL STATEMENT"); /********************************************************\ * Display the number of rows after issuing CALL statement * \********************************************************/ strcpy ( stmt, "SELECT COUNT(*) FROM "); strcat (stmt, table_name); EXEC SQL PREPARE s1 FROM :stmt; EMB_SQL_CHECK("PREPARE"); EXEC SQL DECLARE c1 CURSOR FOR s1; EXEC SQL OPEN c1; EMB_SQL_CHECK("OPEN"); EXEC SQL FETCH c1 INTO :numrows; EXEC SQL CLOSE c1; EMB_SQL_CHECK("CLOSE"); printf("\nNumber of rows in %11s = %d\n", table_name, numrows); /* COMMIT or ROLLBACK the transaction */ if (SQLCODE == 0) { /* Successful, but rollback the changes to the database */ EXEC SQL ROLLBACK; printf("Server Procedure Complete.\n"); } else { /* print the error message, roll back the transaction and return */ sqlaintp (eBuffer, 1024, 80, &sqlca); printf("\n%s\n", eBuffer); EXEC SQL ROLLBACK; printf("Server Procedure Transaction Rolled Back.\n\n"); return 1; } /* Free allocated memory */ free( inout_sqlda ); /* Disconnect from Remote Database */ EXEC SQL CONNECT RESET; EMB_SQL_CHECK("CONNECT RESET"); return 0; } /* end of program : dynamic.sqc */