patches for 6.5

Hi,

I have some patches for version 6.5 (postgresql.snapshot.tar.gz dated Mar 26):

varchar-array.patch this patch adds support for arrays of char() and
varchar(), which where always missing from postgres,
and also fixes a bug in the catalog definition of
array_in(). You can now define filds as:

x char(12)[],
y varchar(9)[],

block-size.patch this patch fixes many errors in the parser and other
program which happen with very large query statements
(> 8K) when using a page size other than 8192.
The patch also replaces all the occurrences of `8192'
and `1<<13' in the sources with the proper constants
defined in various include files.

I found a little problem with this patch: flex defines
an internal buffer size of 16K which is obviously
inadequate with large queries. I solved the problem
replacing 16K with 64K with sed, but this introduces
some constants hardwired in the Makefiles, which I
don't like very much. I don't even know if this fix
is portable with other versions of flex. If someone
has a better idea it is welcome.

In the .tgz attachment there are also two sql file I used for testing.

--
Massimo Dal Zotto

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