C++ UNIX Code Sample for Connecting to TDV Server

The following example shows a small test program written in C++ for UNIX. The string “dsn” uses the connection string format rather than DSN format. It is used in SQLDriverConnect call to connect to the database.

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#include <sql.h>

#include <sqlext.h>

#include <stdio.h>

#include <string.h>

int SQLSuccess(SQLRETURN rc) {

	return (rc == SQL_SUCCESS || rc == SQL_SUCCESS_WITH_INFO);

}

void extract_error(const char* sqlFunc, SQLHANDLE handle, SQLSMALLINT type) {

	SQLINTEGER i = 0;

	SQLINTEGER native;

	SQLCHAR state[7];

	SQLCHAR text[256];

	SQLSMALLINT len;

	SQLRETURN ret;

	memset(state, 0, sizeof(state));

	memset(text, 0, sizeof(text));

	do {

		ret = SQLGetDiagRec(type, handle, ++i, state, &native, text, sizeof(text), &len);

		if (SQL_SUCCEEDED(ret)) {

			printf("%s:%ld:%ld:%s\n", state, i, native, text);

		}

	} while (ret == SQL_SUCCESS);

	exit(0);

}

int fetchResultSet(SQLHSTMT stmt)

{

	SQLLEN indicator;

	SQLRETURN ret;

	char buf[512];

	SQLSMALLINT columns;

	int i=0,rows=0;

	SQLNumResultCols(stmt, &columns);

	//Fetch all data

	while(1){

		ret = SQLFetch(stmt);

		if ( SQL_NO_DATA == ret ){

			break;

		}else if (!SQLSuccess(ret)) {

			extract_error("SQLFetch", stmt, SQL_HANDLE_STMT);

		}

		rows++;

		for(i=1;i<columns;i++){

			ret = SQLGetData(stmt, i, SQL_C_CHAR, buf, sizeof(buf), &indicator);

			if (!SQLSuccess(ret)) {

				extract_error("SQLGetData", stmt, SQL_HANDLE_STMT);

			}

		}

	}

	return rows;

}

int main(int argc, char * argv[])

{

	printf("sizeof(SQLULEN)=%d\n",sizeof(SQLULEN));

	printf("sizeof(SQLUINTEGER)=%d\n",sizeof(SQLUINTEGER));

	printf("sizeof(SQLUSMALLINT)=%d\n",sizeof(SQLUSMALLINT));

	SQLRETURN ret;

	SQLCHAR tableCat[64];

	SQLCHAR tableSchem[64];

	SQLCHAR tableName[64];

	SQLCHAR tableType[64];

	SQLCHAR remarks[64];

	SQLLEN Str_Len;

	SQLSMALLINT colCount=0;

	SQLCHAR dsn[] = "Driver={TDV 8.0};Server=localhost;Port=9401;Domain=composite;dataSource=system;user=admin;password=admin;validateRemoteHostname=false;connectTimeout=3000;enableFastExec=false";

	SQLCHAR query[] ="select * from ALL_TABLES";

	SQLHENV env;

	SQLHDBC dbc;

	SQLHSTMT stmt;

	SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &env);

	SQLSetEnvAttr(env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);

	SQLAllocHandle(SQL_HANDLE_DBC, env, &dbc);

	ret = SQLDriverConnect(dbc, NULL, (SQLCHAR*) dsn, SQL_NTS, NULL, 0, NULL, SQL_DRIVER_NOPROMPT);

	if (!SQLSuccess(ret)) {

		extract_error("SQLDriverConnect", dbc, SQL_HANDLE_DBC);

	}

	SQLCHAR ver[512];

	SQLGetInfo(dbc,

		SQL_DRIVER_NAME,

		ver,

		512,

		NULL);

	printf("%s\n",ver);

	SQLGetInfo(dbc,

		SQL_DRIVER_VER,

		ver,

		512,

		NULL);

	printf("%s\n",ver);

	SQLGetInfo(dbc,

		SQL_DBMS_NAME,

		ver,

		512,

		NULL);

	printf("%s\n",ver);

	SQLGetInfo(dbc,

		SQL_DBMS_VER,

		ver,

		512,

		NULL);

	printf("%s\n",ver);

	ret = SQLAllocHandle(SQL_HANDLE_STMT, dbc, &stmt);

	if (!SQLSuccess(ret)) {

		extract_error("SQLAllocHandle", dbc, SQL_HANDLE_DBC);

	}

	ret = SQLTables(stmt,(SQLCHAR*)"",0,(SQLCHAR*)"",0,(SQLCHAR*)"",0,(SQLCHAR*)"TABLE",SQL_NTS);

	ret= SQLNumResultCols(stmt,&colCount);

	ret = SQLBindCol(stmt, 1, SQL_C_CHAR, tableCat, sizeof(tableName), &Str_Len);

	ret = SQLBindCol(stmt, 2, SQL_C_CHAR, tableSchem, sizeof(tableName), &Str_Len);

	ret = SQLBindCol(stmt, 3, SQL_C_CHAR, tableName, sizeof(tableName), &Str_Len);

	ret = SQLBindCol(stmt, 4, SQL_C_CHAR, tableType, sizeof(tableName), &Str_Len);

	ret = SQLBindCol(stmt, 5, SQL_C_CHAR, remarks, sizeof(tableName), &Str_Len);

	while( (ret=SQLFetch(stmt))==SQL_SUCCESS){

		printf("%s\n",tableName);

	}

	ret = SQLExecDirect(stmt, (SQLCHAR*) query, SQL_NTS);

	//ret= SQLPrepareW(stmt,(SQLWCHAR*)query,10);

	ret= SQLNumResultCols(stmt,&colCount);

	if (!SQLSuccess(ret)) {

		extract_error("SQLExecDirect", stmt, SQL_HANDLE_STMT);

	}

	int totalRows = fetchResultSet(stmt);

	SQLFreeHandle(SQL_HANDLE_STMT, stmt);

	SQLDisconnect(dbc);

	ret = SQLFreeHandle(SQL_HANDLE_DBC, dbc);

	ret = SQLFreeHandle(SQL_HANDLE_ENV, env);

	printf("Execute query completed, total rows %d.\n",totalRows);

	return 0;

}

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