Notepad++ (based on Scintilla) couldn't handle it.
So I had to use another program for editing the SQL file and here comes Vim power which opened the file as it was 1MB.
Vim is often called a "programmer's editor," and so useful for
programming that many consider it an entire IDE. It's not just for programmers,
though. Vim is perfect for all kinds of text editing, from composing
email to editing configuration files.
Vim is designed for use both from a command-line interface and as a standalone application in a graphical user interface. Vim is free and open source software and is released under a license that includes some charityware clauses.
Although Vim was originally released for the Amiga, Vim has since been developed to be cross-platform, supporting many other platforms.
Download link: http://www.vim.org/download.php