varchar => varchar2 headervalue varchar(4000) => varchar2(4000 char)
varchar => varchar2
headervalue varchar(4000) => varchar2(4000 char)

git-svn-id: 8dfb7bc8a35ad97041dc8641b33183382b83e7ae@223 aade673b-a3a6-47a5-a793-c3231508b26e

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