/*************************************************************************** * Licensed Materials - Property of IBM and/or HCL * * IBM Informix Client-SDK * * (C) Copyright IBM Corporation 1997, 2004 All rights reserved. * (c) Copyright HCL Technologies Ltd. 2017. All Rights Reserved. * * * * * * Title: procW.c (Unicode counterpart of proc.c) * * Description: To execute a stored procedure returning multiple results * * The stored procedure executed is - * PROCEDURE multiReturnProc (i integer) * RETURNING integer; * define j integer; * for j in (1 to 5) * return i*j with resume; * end for; * END PROCEDURE * * Because the Informix ODBC driver version 3.3 does not * yet suport output parameters for stored procedures, * the way to get return values from a procedure is to * use SQLBindCol and SQLFetch. This works whether the * procedure returns a single value or multiple values. * * *************************************************************************** */ #include #include #include #ifndef NO_WIN32 #include #include #include #endif /*NO_WIN32*/ #include "infxcli.h" #define ERRMSG_LEN 200 SQLWCHAR defDsnW[] = L"odbc_demo"; SQLCHAR defDsn[] = "odbc_demo"; SQLINTEGER checkError (SQLRETURN rc, SQLSMALLINT handleType, SQLHANDLE handle, SQLCHAR* errmsg) { SQLRETURN retcode = SQL_SUCCESS; SQLSMALLINT errNum = 1; SQLWCHAR sqlStateW[6]; SQLCHAR *sqlState; SQLINTEGER nativeError; SQLWCHAR errMsgW[ERRMSG_LEN]; SQLCHAR *errMsg; SQLSMALLINT textLengthPtr; if ((rc != SQL_SUCCESS) && (rc != SQL_SUCCESS_WITH_INFO)) { while (retcode != SQL_NO_DATA) { retcode = SQLGetDiagRecW (handleType, handle, errNum, sqlStateW, &nativeError, errMsgW, ERRMSG_LEN, &textLengthPtr); if (retcode == SQL_INVALID_HANDLE) { fprintf (stderr, "checkError function was called with an invalid handle!!\n"); return 1; } if ((retcode == SQL_SUCCESS) || (retcode == SQL_SUCCESS_WITH_INFO)) { sqlState = (SQLCHAR *) malloc (wcslen(sqlStateW) + sizeof(char)) ; wcstombs( (char *) sqlState, sqlStateW, wcslen(sqlStateW) + sizeof(char)); errMsg = (SQLCHAR *) malloc (wcslen(errMsgW) + sizeof(char)); wcstombs( (char *) errMsg, errMsgW, wcslen(errMsgW) + sizeof(char)); fprintf (stderr, "ERROR: %d: %s : %s \n", nativeError, sqlState , errMsg); } errNum++; } fprintf (stderr, "%s\n", errmsg); return 1; /* all errors on this handle have been reported */ } else return 0; /* no errors to report */ } int main (long argc, char* argv[]) { /* Declare variables */ /* Handles */ SQLHDBC hdbc; SQLHENV henv; SQLHSTMT hstmt; /* Miscellaneous variables */ SQLWCHAR *dsnW; /*name of the DSN used for connecting to the database*/ SQLRETURN rc = 0; SQLINTEGER in; SQLWCHAR* createProcStmtW = (SQLWCHAR *) L"CREATE PROCEDURE \ multiReturnProc (i integer)\ RETURNING integer;\ define j integer;\ for j in (1 to 5)\ return i*j with resume;\ end for;\ END PROCEDURE;"; SQLWCHAR* dropProcStmtW = (SQLWCHAR *) L"DROP PROCEDURE multiReturnProc"; SQLSMALLINT inputParam = 2; SQLINTEGER retVal = 7, cbRetVal = 0, cbInputParam = 0; int lenArgv1; /* STEP 1. Get data source name from command line (or use default) ** Allocate the environment handle and set ODBC version ** Allocate the connection handle ** Establish the database connection ** Allocate the statement handle */ /* If(dsn is not explicitly passed in as arg) */ if (argc != 2) { /* Use default dsnW - odbc_demo */ fprintf (stdout, "\nUsing default DSN : %s\n", defDsn); dsnW = (SQLWCHAR *) malloc( wcslen(defDsnW) * sizeof(SQLWCHAR) + sizeof(SQLWCHAR) ); wcscpy ((SQLWCHAR *)dsnW, (SQLWCHAR *)defDsnW); } else { /* Use specified dsnW */ lenArgv1 = strlen((char *)argv[1]); dsnW = (SQLWCHAR *) malloc (lenArgv1 * sizeof(SQLWCHAR) + sizeof(SQLWCHAR)); mbstowcs (dsnW, (char *)argv[1], lenArgv1 + sizeof(char)); fprintf (stdout, "\nUsing specified DSN : %s\n", argv[1]); } /* Allocate the Environment handle */ rc = SQLAllocHandle (SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv); if (rc != SQL_SUCCESS) { fprintf (stdout, "Environment Handle Allocation failed\nExiting!!"); return (1); } /* Set the ODBC version to 3.0 */ rc = SQLSetEnvAttr (henv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER) SQL_OV_ODBC3, 0); if (checkError (rc, SQL_HANDLE_ENV, henv, (SQLCHAR *) "Error in Step 1 -- SQLSetEnvAttr failed\nExiting!!")) return (1); /* Allocate the connection handle */ rc = SQLAllocHandle (SQL_HANDLE_DBC, henv, &hdbc); if (checkError (rc, SQL_HANDLE_ENV, henv, (SQLCHAR *) "Error in Step 1 -- Connection Handle Allocation failed\nExiting!!")) return (1); /* Establish the database connection */ rc = SQLConnectW (hdbc, dsnW, SQL_NTS, (SQLWCHAR *) L"", SQL_NTS, (SQLWCHAR *) L"", SQL_NTS); if (checkError (rc, SQL_HANDLE_DBC, hdbc, (SQLCHAR *) "Error in Step 1 -- SQLConnect failed\nExiting!!")) return (1); /* Allocate the statement handle */ rc = SQLAllocHandle (SQL_HANDLE_STMT, hdbc, &hstmt ); if (checkError (rc, SQL_HANDLE_DBC, hdbc, (SQLCHAR *) "Error in Step 1 -- Statement Handle Allocation failed\nExiting!!")) return (1); fprintf (stdout, "STEP 1 done...connected to database\n"); /* STEP 2. Create the stored procedure in the database */ /* Execute the SQL statement to create the stored procedure*/ rc = SQLExecDirectW (hstmt, createProcStmtW, SQL_NTS); if (checkError (rc, SQL_HANDLE_STMT, hstmt, (SQLCHAR *) "Error in Step 2 -- SQLExecDirect failed\n")) goto Exit; fprintf (stdout, "STEP 2 done...stored procedure created\nExecuting procedure...\n\n"); /* STEP 3. Bind the input parameter ** Execute the procedure ** Bind the result set column (return values) ** Fetch the results ** Display the results ** Close the result set cursor */ /* Bind the input parameter */ rc = SQLBindParameter (hstmt, 1, SQL_PARAM_INPUT, SQL_C_SSHORT, SQL_INTEGER, 0, 0, &inputParam, 0, &cbInputParam); if (checkError (rc, SQL_HANDLE_STMT, hstmt, (SQLCHAR *) "Error in Step 3 -- SQLBindParameter failed\n")) return (1); /* Execute the procedure */ rc = SQLExecDirectW (hstmt, (SQLWCHAR *) L"{call multiReturnProc (?)}", SQL_NTS); if (checkError (rc, SQL_HANDLE_STMT, hstmt, (SQLCHAR *) "Error in Step 3 -- SQLExecDirect failed\n")) goto Exit; /* Bind the result set column */ rc = SQLBindCol (hstmt, 1, SQL_C_SLONG, (SQLPOINTER)&retVal, 0, &cbRetVal); if (checkError (rc, SQL_HANDLE_STMT, hstmt, (SQLCHAR *) "Error in Step 3 -- SQLBindCol failed\n")) goto Exit; /* Fetch and display the results */ while (1) { rc = SQLFetch (hstmt); if (rc == SQL_NO_DATA_FOUND) break; else if (checkError (rc, SQL_HANDLE_STMT, hstmt, (SQLCHAR *) "Error in Step 3 -- SQLFetch failed\n")) goto Exit; /* Display the results */ fprintf (stdout, "Procedure returned %d\n", retVal); } /* Close the result set cursor */ rc = SQLCloseCursor (hstmt); if (checkError (rc, SQL_HANDLE_STMT, hstmt, (SQLCHAR *) "Error in Step 3 -- SQLCloseCursor failed\n")) goto Exit; fprintf (stdout, "\nSTEP 3 done...stored procedure executed\n"); Exit: /* CLEANUP: Drop the stored procedure from the database ** Close the statement handle ** Free the statement handle ** Disconnect from the datasource ** Free the connection and environment handles ** Exit */ /* Drop the stored procedure from the database */ SQLExecDirectW (hstmt, dropProcStmtW, SQL_NTS); /* Close the statement handle */ SQLFreeStmt (hstmt, SQL_CLOSE); /* Free the statement handle */ SQLFreeHandle (SQL_HANDLE_STMT, hstmt); /* Disconnect from the data source */ SQLDisconnect (hdbc); /* Free the environment handle and the database connection handle */ SQLFreeHandle (SQL_HANDLE_DBC, hdbc); SQLFreeHandle (SQL_HANDLE_ENV, henv); fprintf (stdout,"\n\nHit to terminate the program...\n\n"); in = getchar (); return (rc); }