Tom Lane wrote:

If I understood what I was reading, this would take several things:
* Remove the "special UTF-8 check" in pg_verifymbstr;
* Extend pg_utf2wchar_with_len and pg_utf_mblen to handle the 4-byte case;
* Set maxmblen to 4 in the pg_wchar_table[] entry for UTF-8.

Are there any other places that would have to change?  Would this break
anything?  The testing aspect is what's bothering me at the moment.

Does this change what client_encoding = UNICODE might produce? The JDBC driver will need some tweaking to handle this -- Java uses UTF-16 internally and I think some supplementary character (?) scheme for values above 0xffff as of JDK 1.5.


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