// Frees environment handle -- calling this will make the lodbc package unusable because all setup is performed in init()
func FreeEnvironment() error {
ret := odbc.SQLFreeHandle(odbc.SQL_HANDLE_ENV, envHandle)
if isError(ret) {
return errorEnvironment(envHandle)
}
return nil
}
func (stmt *statement) Close() error {
//Verify that stmtHandle is valid
if stmt.handle == 0 {
return nil
}
//Verify that statement has not already been closed
if stmt.isClosed {
return nil
}
var err error
//Close any open rows
if stmt.rows != nil {
err = stmt.rows.Close()
}
//Clear any bind values
stmt.bindValues = nil
//Free the statement handle
ret := odbc.SQLFreeHandle(odbc.SQL_HANDLE_STMT, stmt.handle)
if isError(ret) {
err = errorStatement(stmt.handle, stmt.sqlStmt)
}
//Mark the statement as closed with the connection
stmt.conn.closeStatement(stmt)
//Clear the handles
stmt.handle = 0
stmt.stmtDescHandle = 0
//Clear the finalizer
runtime.SetFinalizer(stmt, nil)
//Mark the rows as closed
stmt.isClosed = true
//Return any error
if err != nil {
return err
}
return nil
}
// Close invalidates and potentially stops any current
// prepared statements and transactions, marking this
// connection as no longer in use.
func (c *connection) Close() error {
// Verify that connHandle is valid
if c.handle == 0 {
return nil
}
// Verify that connection has not already been closed
if c.isClosed {
return nil
}
var err error
// Close all of the statements owned by the connection
for key, _ := range c.statements {
// Skip the statement if it is already nil
if isNil(key) {
continue
}
key.Close()
}
c.statements = nil
// If the transaction is active, roll it back
if c.isTransactionActive {
ret := odbc.SQLEndTran(odbc.SQL_HANDLE_DBC, c.handle, odbc.SQL_ROLLBACK)
if isError(ret) {
err = errorConnection(c.handle)
}
//Turn AutoCommit back on
ret = odbc.SQLSetConnectAttr(c.handle, odbc.SQL_ATTR_AUTOCOMMIT, odbc.SQLPOINTER(odbc.SQL_AUTOCOMMIT_ON), 0, nil)
if isError(ret) {
err = errorConnection(c.handle)
}
}
// Disconnect connection
ret := odbc.SQLDisconnect(c.handle)
if isError(ret) {
err = errorConnection(c.handle)
}
// Deallocate connection
ret = odbc.SQLFreeHandle(odbc.SQL_HANDLE_DBC, c.handle)
if isError(ret) {
err = errorConnection(c.handle)
}
// Clear the handle
c.handle = 0
// Set connection to closed
c.isClosed = true
//Clear the finalizer
runtime.SetFinalizer(c, nil)
// Return any error
if err != nil {
return err
}
return nil
}