Problem with query length

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I have posted this mail to psql-general.  But i didn't get any answer yet.

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Hello
When i had tried to insert into text field text (length about 4000 chars), the backend have crashed with status 139.
Thiserror is happened when the query length ( SQL query) is more than 4095 chars. I am using PostgreSQL 6.4.2 on
Linux.

My questions are:
1. Is there problem with text field or with length of SQL query?
2. Would postgresql have any limits for SQL query length?
I checked the archives but only found references to the 8K limit. Any help would be greatly appreciated.
Thanks for help            Natalya Makushina             mak@rtsoft.msk.ru