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#include <sqlext.h>
#include <stdexcept>
#include <cstdio>
#include <cstring>
#include "odbc-connection.h"
#include "odbc-selectcommand.h"
#include "odbc-modifycommand.h"
#include "error.h"
NAMEDFACTORY("odbc", ODBC::Connection, DB::ConnectionFactory);
ODBC::Connection::Connection(const DSN& d) :
env(nullptr),
conn(nullptr),
thinkDelStyle(DB::BulkDeleteUsingUsing),
thinkUpdStyle(DB::BulkUpdateUsingFromSrc)
{
connectPre();
RETCODE dberr = SQLConnect(conn, (SQLCHAR*)d.dsn.c_str(), SQL_NTS,
(SQLCHAR*)d.username.c_str(), SQL_NTS, (SQLCHAR*)d.password.c_str(), SQL_NTS);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_DBC, conn);
}
connectPost();
}
void
ODBC::Connection::connectPre()
{
SQLRETURN dberr = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &env);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_ENV, env);
}
dberr = SQLSetEnvAttr(env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_ENV, env);
}
dberr = SQLAllocHandle(SQL_HANDLE_DBC, env, &conn);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_ENV, env);
}
dberr = SQLSetConnectAttr(conn, SQL_LOGIN_TIMEOUT, (SQLPOINTER *)5, 0);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_ENV, env);
}
}
void
ODBC::Connection::connectPost()
{
RETCODE dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_DBC, conn);
}
std::array<SQLCHAR, 1024> info {};
dberr = SQLGetInfo(conn, SQL_DRIVER_NAME, info.data(), info.size(), nullptr);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_DBC, conn);
}
// Apply known DB specific tweaks
// NOLINTNEXTLINE(hicpp-no-array-decay)
if (strcasestr((const char *)info.data(), "myodbc")) {
thinkDelStyle = DB::BulkDeleteUsingUsingAlias;
thinkUpdStyle = DB::BulkUpdateUsingJoin;
}
}
ODBC::Connection::Connection(const std::string & s) :
env(nullptr),
conn(nullptr),
thinkDelStyle(DB::BulkDeleteUsingUsing),
thinkUpdStyle(DB::BulkUpdateUsingFromSrc)
{
connectPre();
RETCODE dberr = SQLDriverConnect(conn, nullptr, (SQLCHAR*)s.c_str(), s.length(), nullptr, 0, nullptr, SQL_DRIVER_NOPROMPT);
if (!SQL_SUCCEEDED(dberr)) {
throw ConnectionError(dberr, SQL_HANDLE_DBC, conn);
}
connectPost();
}
ODBC::Connection::~Connection()
{
if (conn) {
SQLDisconnect(conn);
SQLFreeHandle(SQL_HANDLE_DBC, conn);
}
if (env) {
SQLFreeHandle(SQL_HANDLE_ENV, env);
}
}
void
ODBC::Connection::beginTxInt()
{
SQLRETURN dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_OFF);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn);
}
}
void
ODBC::Connection::commitTxInt()
{
SQLRETURN dberr = SQLEndTran(SQL_HANDLE_DBC, conn, SQL_COMMIT);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn);
}
dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn);
}
}
void
ODBC::Connection::rollbackTxInt()
{
SQLRETURN dberr = SQLEndTran(SQL_HANDLE_DBC, conn, SQL_ROLLBACK);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn);
}
dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON);
if (!SQL_SUCCEEDED(dberr)) {
throw Error(dberr, SQL_HANDLE_DBC, conn);
}
}
DB::BulkDeleteStyle
ODBC::Connection::bulkDeleteStyle() const
{
return thinkDelStyle;
}
DB::BulkUpdateStyle
ODBC::Connection::bulkUpdateStyle() const
{
return thinkUpdStyle;
}
DB::SelectCommandPtr
ODBC::Connection::select(const std::string & sql, const DB::CommandOptionsCPtr &)
{
return std::make_shared<ODBC::SelectCommand>(*this, sql);
}
DB::ModifyCommandPtr
ODBC::Connection::modify(const std::string & sql, const DB::CommandOptionsCPtr &)
{
return std::make_shared<ODBC::ModifyCommand>(*this, sql);
}
std::string
ODBC::Connection::getAttrStr(SQLINTEGER attr) const
{
std::string rtn;
rtn.resize(BUFSIZ);
SQLINTEGER size = 0;
SQLINTEGER dberr = SQLGetConnectAttr(conn, attr, (unsigned char *)rtn.c_str(), BUFSIZ, &size);
if (!SQL_SUCCEEDED(dberr)) {
throw ODBC::Error(dberr, SQL_HANDLE_DBC, conn);
}
rtn.resize(size);
return rtn;
}
SQLINTEGER
ODBC::Connection::getAttrInt(SQLINTEGER attr) const
{
SQLINTEGER result;
SQLINTEGER dberr = SQLGetConnectAttr(conn, attr, &result, sizeof(result), nullptr);
if (!SQL_SUCCEEDED(dberr)) {
throw ODBC::Error(dberr, SQL_HANDLE_DBC, conn);
}
return result;
}
void
ODBC::Connection::ping() const
{
SQLINTEGER dead = getAttrInt(SQL_ATTR_CONNECTION_DEAD);
if (dead != SQL_CD_FALSE) {
throw ODBC::ConnectionError(0, SQL_HANDLE_DBC, conn);
}
}
ODBC::ConnectionError::ConnectionError(RETCODE err, SQLSMALLINT handletype, SQLHANDLE handle) :
ODBC::Error(err, handletype, handle),
DB::ConnectionError()
{
}
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