problem with select where like ']'

hi,
i have a table (view actually) which contains field "article_name" which is
written like:
[AGD]|[Kuchenki Mikrofalowe]|[Samsung AKMS1]
i.e. some string within "[]" delimited by "|"
i want to select all record that have "[AGD]|[" in front of them
so i tried 
select * from my_view where article_name like '[AGD]|[';
this doesn't work. no errors, but no tuples returned.
i checked that the problem is character ']'.
'[' works o.k. '|' - i guess works too. 
but inserting "]" makes the whole expression doesn't work
i tried escaping of it like
\], \\]
or even
\\\]
but none of these worked.
right now i'm using comparison:
where substring (...) = '...' and it works even with those "]" signs.
but i'm just wondering why like ']' doesn't work.
any ideas?

depesz

p.s. sorry for my english.

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