ODBC files prefixed with odbc-

1 files changed, 273 insertions, 0 deletions

diff --git a/libodbcpp/odbc-connection.cpp b/libodbcpp/odbc-connection.cpp
new file mode 100644
index 0000000..a6fa2bd
--- /dev/null
+++ b/libodbcpp/odbc-connection.cpp
@@ -0,0 +1,273 @@
+#include <sqlext.h>
+#include <stdexcept>
+#include <syslog.h>
+#include <stdio.h>
+#include <string.h>
+#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(0),
+	conn(0),
+	thinkDelStyle(DB::BulkDeleteUsingUsing),
+	thinkUpdStyle(DB::BulkUpdateUsingFromSrc),
+	txDepth(0),
+	txAborted(false)
+{
+	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, "Connect");
+	}
+	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, "Allocate handle");
+	}
+
+	dberr = SQLSetEnvAttr(env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
+	if (!SQL_SUCCEEDED(dberr)) {
+		throw ConnectionError(dberr, SQL_HANDLE_ENV, env, "Set ODBC version");
+	}
+
+	dberr = SQLAllocHandle(SQL_HANDLE_DBC, env, &conn);
+	if (!SQL_SUCCEEDED(dberr)) {
+		throw ConnectionError(dberr, SQL_HANDLE_ENV, env, "Allocate DBC handle");
+	}
+
+	dberr = SQLSetConnectAttr(conn, SQL_LOGIN_TIMEOUT, (SQLPOINTER *)5, 0);
+	if (!SQL_SUCCEEDED(dberr)) {
+		throw ConnectionError(dberr, SQL_HANDLE_ENV, env, "Set connection attributes");
+	}
+}
+
+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, "Set default auto commit");
+	}
+	char info[1024];
+	dberr = SQLGetInfo(conn, SQL_DRIVER_NAME, (SQLCHAR*)info, sizeof(info), NULL);
+	if (!SQL_SUCCEEDED(dberr)) {
+		throw ConnectionError(dberr, SQL_HANDLE_DBC, conn, "Get info");
+	}
+	// Apply known DB specific tweaks
+	if (strstr(info, "myodbc") != NULL) {
+		thinkDelStyle = DB::BulkDeleteUsingUsingAlias;
+		thinkUpdStyle = DB::BulkUpdateUsingJoin;
+	}
+}
+
+ODBC::Connection::Connection(const std::string & s) :
+	env(0),
+	conn(0),
+	thinkDelStyle(DB::BulkDeleteUsingUsing),
+	thinkUpdStyle(DB::BulkUpdateUsingFromSrc),
+	txDepth(0),
+	txAborted(false)
+{
+	connectPre();
+	RETCODE dberr = SQLDriverConnect(conn, NULL, (SQLCHAR*)s.c_str(), s.length(), NULL, 0, NULL, SQL_DRIVER_NOPROMPT);
+	if (!SQL_SUCCEEDED(dberr)) {
+		throw ConnectionError(dberr, SQL_HANDLE_DBC, conn, "Connect");
+	}
+	connectPost();
+}
+
+ODBC::Connection::~Connection()
+{
+	if (conn) {
+		if (!SQL_SUCCEEDED(SQLDisconnect(conn))) {
+			syslog(LOG_WARNING, "%s: Disconnect error", __FUNCTION__);
+		}
+		if (!SQL_SUCCEEDED(SQLFreeHandle(SQL_HANDLE_DBC, conn))) {
+			syslog(LOG_WARNING, "%s: Free connection handle error", __FUNCTION__);
+		}
+	}
+	if (env) {
+		if (!SQL_SUCCEEDED(SQLFreeHandle(SQL_HANDLE_ENV, env))) {
+			syslog(LOG_WARNING, "%s: Free connection handle error", __FUNCTION__);
+		}
+	}
+}
+
+void
+ODBC::Connection::finish() const
+{
+	if (txDepth != 0) {
+		rollbackTx();
+		throw Error("Transaction still open");
+	}
+}
+
+int
+ODBC::Connection::beginTx() const
+{
+	if (txDepth == 0) {
+		SQLRETURN dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_OFF);
+		if (!SQL_SUCCEEDED(dberr)) {
+			throw Error(dberr, SQL_HANDLE_DBC, conn, "Set default auto commit");
+		}
+	}
+	txDepth += 1;
+	return txDepth;
+}
+
+int
+ODBC::Connection::commitTx() const
+{
+	if (txDepth > 0) {
+		if (txAborted) {
+			return rollbackTx();
+		}
+		txDepth -= 1;
+		if (txDepth == 0) {
+			SQLRETURN dberr = SQLEndTran(SQL_HANDLE_DBC, conn, SQL_COMMIT);
+			if (!SQL_SUCCEEDED(dberr)) {
+				throw Error(dberr, SQL_HANDLE_DBC, conn, "SQLEndTran (SQL_COMMIT)");
+			}
+			dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON);
+			if (!SQL_SUCCEEDED(dberr)) {
+				throw Error(dberr, SQL_HANDLE_DBC, conn, "Enable auto commit");
+			}
+			txAborted = false;
+		}
+		return txDepth;
+	}
+	throw Error("Attempt to commit none existant transaction");
+}
+
+int
+ODBC::Connection::rollbackTx() const
+{
+	if (txDepth > 0) {
+		txDepth -= 1;
+		if (txDepth == 0) {
+			SQLRETURN dberr = SQLEndTran(SQL_HANDLE_DBC, conn, SQL_ROLLBACK);
+			if (!SQL_SUCCEEDED(dberr)) {
+				throw Error(dberr, SQL_HANDLE_DBC, conn, "SQLEndTran (SQL_ROLLBACK)");
+			}
+			dberr = SQLSetConnectOption(conn, SQL_ATTR_AUTOCOMMIT, SQL_AUTOCOMMIT_ON);
+			if (!SQL_SUCCEEDED(dberr)) {
+				throw Error(dberr, SQL_HANDLE_DBC, conn, "Enable auto commit");
+			}
+			txAborted = false;
+		}
+		return txDepth;
+	}
+	throw Error("Attempt to rollback none existant transaction");
+}
+
+void
+ODBC::Connection::abortTx() const
+{
+	txAborted = true;
+}
+
+bool
+ODBC::Connection::txIsAborted() const
+{
+	return txAborted;
+}
+
+bool
+ODBC::Connection::inTx() const
+{
+	return (txDepth > 0);
+}
+
+DB::BulkDeleteStyle
+ODBC::Connection::bulkDeleteStyle() const
+{
+	return thinkDelStyle;
+}
+
+DB::BulkUpdateStyle
+ODBC::Connection::bulkUpdateStyle() const
+{
+	return thinkUpdStyle;
+}
+
+DB::SelectCommand *
+ODBC::Connection::newSelectCommand(const std::string & sql) const
+{
+	return new ODBC::SelectCommand(*this, sql);
+}
+
+DB::ModifyCommand *
+ODBC::Connection::newModifyCommand(const std::string & sql) const
+{
+	return new 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, "ODBC::Connection::getAttrStr SQLGetConnectAttr");
+	}
+	rtn.resize(size);
+	return rtn;
+}
+
+SQLINTEGER
+ODBC::Connection::getAttrInt(SQLINTEGER attr) const
+{
+	SQLINTEGER result;
+	SQLINTEGER dberr = SQLGetConnectAttr(conn, attr, &result, sizeof(result), 0);
+	if (!SQL_SUCCEEDED(dberr)) {
+		throw ODBC::Error(dberr, SQL_HANDLE_DBC, conn, "ODBC::Connection::getAttrInt SQLGetConnectAttr");
+	}
+	return result;
+}
+
+void
+ODBC::Connection::ping() const
+{
+	SQLINTEGER dead = getAttrInt(SQL_ATTR_CONNECTION_DEAD);
+	if (dead != SQL_CD_FALSE) {
+		throw ODBC::Error("Connection is dead");
+	}
+}
+
+ODBC::ConnectionError::ConnectionError(RETCODE err, SQLSMALLINT handletype, SQLHANDLE handle, char const * stage) :
+	ODBC::Error(err, handletype, handle, stage),
+	DB::ConnectionError()
+{
+}
+
+ODBC::ConnectionError::ConnectionError(const ConnectionError & e) :
+	ODBC::Error(strdup(e.what())),
+	DB::ConnectionError(e.FailureTime)
+{
+}
+
+void ODBC::Connection::beginBulkUpload(const char *, const char *) const
+{
+	throw std::runtime_error("Not implemented");
+}
+void ODBC::Connection::endBulkUpload(const char *) const
+{
+	throw std::runtime_error("Not implemented");
+}
+size_t ODBC::Connection::bulkUploadData(const char *, size_t) const
+{
+	throw std::runtime_error("Not implemented");
+}
+