DBD::Informix for DBI
- Written by Alligator Descartes <descarte@mcqueen.com>
- Rewritten by Jonathan Leffler (johnl@informix.com)
18/08/95: Started.
Version 0.0.0 (Totally pre-alpha!)
17/10/95:15:39 After a good break of about a month and a half, back in the
saddle.
We have data from SELECTs coming back from the database!
Released 0.20pl0 Disney on ftp.mcqueen.com. Limited hacker
release.
14/04/96:18:04 Added support for CREATE, DROP, INSERT, UPDATE and DELETE.
Fixed $DBI::errnum and $DBI::errstr problems
Fixed Informix.pm to stop reporting MSQL_HOME errors
Fixed Makefile.PL
Removed hacky 'build' file and uses Makefile.PL exclusively
now.
0.21 Release
------------
01/09/95: Fixed truncated INTEGER bug. Other numerical types still
screwed. Patch on the way.
0.22 Release
------------
09/09/96: Added @ary = $drh->func('_ListDBs'); method for getting
a list of extant databases on the local Informix server.
(From original code and suggestion by
George.Vicherek@Sciatl.COM)
10/09/96: Fixed all numeric types to return correctly. CHAR fields don't
quite behave as planned, or perhaps they do. Added 'multicursor'
test which proves that simultanous multiple cursors fails
miserably.
0.23 Release
------------
17/09/96: Added patch for bad column names as show in George Vicherek's
splendid test case. (extratests/primitives.pl exercises this)
18/09/96: Wrapped in a patch to Makefile.PL from Christophe Martin.
Added some other Makefile.PL patches of my own. It should now
support cleaner builds on HP-UX (spit!) and correctly detect
when dbdimp.ec has changed.
18/09/96: Wrapped in patches by Terry Nightingale based on Bill Hailes'
isqlperl for supporting multi-cursors. Cleaned the type
handling code again.
0.24 Release
------------
26/09/96: Patches from Terry arrived. This'll be the 0.25 release. Seems
to work.
0.25 Release
------------
96-11-01: Control transferred to Jonathan Leffler (johnl@informix.com).
96-11-19: Rewrite of dbdimp.ec more or less complete. The ESQL/C code
has been almost totally rewritten; the Perl interface code is
still similar to what was there previously. Nearly ready to go
into release. 5.0x ESQL/C not linking OK on Solaris; not sure
why. 7.21 is doing fine.
96-11-25: Changes leading up to 0.25b1 release. Add sqlca record handling
for statements. Add use of EXEC IMMEDIATE when feasible.
96-11-26: Feedback from beta testers incorporated into build process.
Not all problems will be resolved yet. Version 0.25b2.
96-11-30: Move sqlca handling to connection (not statement).
Fix blob handling to the extent that SELECT works. (INSERT and
UPDATE still need fixing. INSERT will probably be able to adapt
the SELECT code to handle blobs. UPDATE will be very tricky.
Memory leaks may (probably) occur.
Upgrade Makefile.PL to always set INFORMIXC when compiling ESQL/C.
96-12-01: Upgrade Makefile.PL to use new Perl scripts esqlcc, esqlsed and
esqlld to protect platforms such as DEC OSF/1 where the C
compiler is not used to link shared libraries. Also, only use
GCC warnings when DBD_GCC_DEBUG is set in the environment. Also
use $(RM_F) to remove the generated C files instead of $(RM) so
that it works for platforms like SCO where $(RM) is not defined
by MAKE automatically.
96-12-02: Release 0.25b3 with some work incomplete. Update Makefile.PL so
that "make perl" works. Note that INSERT and blobs does not work!
96-12-03: Update Makefile.PL (and esqlcc) to use '$(FULLPERL) esqlcc' etc.
Rename the extratests directory to t for automatic testing as
documented in the Test::Harness module. Create (and document)
InformixTest.pm to help with the test programs. Note that
test.pl does not exploit it all that much because it has to test
some more basic stuff. However, the other tests do use it.
NB: ESQL/C 5.00 and 5.01 have a bug in the SQL descriptor code
which means that using 'char *' as a type restricts you to precisely
3 characters of data. This is fixed in 5.02 and above. Dammit!
96-12-04: Update Makefile.PL to overcome Dave Thomas problems on DEC OSF
(version 25.13 sent to him for approval, and comments incorporated
into version 25.14 .. 25.16). Also finish converting the tests in
the t directory.
96-12-05: More revisions to Makefile.PL, some putting teeth into the
prerequisites, some more dealing with DEC OSF (there's a compiler
flag to say set __STDC__, as there usually is). Rename nm_* inside
the imp_sth structure. Redefine the type of imp_sth->blobs and
upgrade code to match. Test t/blob03.t passes; some work to do to
get t/blob04.t to pass. Improved README. Etc.
96-12-09: Finally worked out how SQL descriptors handle blobs. Code now works
safely with blobs located in memory. However, with ESQL/C 7.21.UC1
on Solaris 2.4, there is a memory leak corresponding to the space
allocated for the blobs for a given statement unless you manually
release it before deallocating the descriptor. This is nasty, and
may not be true of other versions. Added test t/blob02.t. Note
that t/blob03.t uses the data created by t/blob02.t, so it must be
run (reasonably successfully) before t/blob03.t can be run
successfully. Use decsci.[ch] code (plus auxilliary function
decgen() inside dbdimp.ec) to format FLOAT, SMALLFLOAT, DECIMAL and
MONEY quantities. The 5.0x and 6.0x libraries do not always handle
these gracefully.
With Thanks to the DBD::Informix v0.25 Testing Team:
John Wang - wangj@aromat.com
Del Simmons - del@infoman.com
Dave Thomas - dave@thomases.com
Oyvind Gjerstad - ogj@tglobe1.tollpost.no
Jeff Rowe - j.p.rowe@larc.nasa.gov
Rodlyn Joseph - bluephi@sharpcomm.com
Duc Nguyen - dhn@benvolio.nova.att.com
Serge Davidov - serge@fcmc.com
96-12-10: Handle 5.00 and 5.01 by supplying actual array names to GET
DESCRIPTOR, thus bypassing the bug. Note that it does affect 5.01
too; edited esql5_00.h to match. Patch sent to Jeff Rowe who
confirms it works. (Note to JL: 5.01 found on Godzilla; what is
installed as 5.00 is actually 4.10 ESQL/C). Version 0.25p1 created
but not released officially or publicly.
96-12-13: Update Makefile.PL to help the AIX people. Version 0.25p2 created
but only the Makefile.PL changes sent to the dbi-users@fugue.com so
not released officially, though available publicly.
0.26 Release
------------
96-12-18: Fix bug in patched Makefile.PL (need space before __H_LOCALEDEF).
Updated dbd_ix_setconnection() to take connection information, and
updated code in dbdimp.ec to ensure that the correct connection is
set before starting work. Simple testing more or less works. Some
more major revisions, such as not passing SV* to most of the code in
dbdimp.ec (let the Informix.c code convert as much as possible to
plain C). Rework the 'do' function to completely override
DBI::_::db::do, avoiding problems with the rows() function.
96-12-19: Add install instructions to README file after Wes Gamble
(wgamble@informix.com) pointed out this omission. Add extensive
notes to Informix.PM on transaction management. Implement most
of what those notes say (WITH HOLD cursors omitted at the
moment).
96-12-20: Get transaction stuff to work, more or less, with AutoCommit On or
Off, in MODE ANSI or Logged databases. Tests t/transact0[123].t
added, but these still need to be more formally verified. They
pass with OnLine and any type of database. Clean up various tests
so that they pass on MODE ANSI databases. Add select_some_data
and select_zero_data functions to InformixTest.pm. Etc. Version
0.26a1. Use bug-fixed version of decsci.c (ouch!).
97-01-09: Updated copyright messages. Improved documentation. Fixed tests.
Add $dbh->{InTransaction} query. Clean up dbdimp.ec so that
AutoCommit works better. Etc. Version 0.26a2.
97-01-12: Use cursors WITH HOLD when a MODE ANSI database is working with
AutoCommit set On. Make transaction tests more sensitive.
This release never made public.
0.50 Release
------------
97-01-12: Version bumped to 0.50p1, for consistency with documented intentions
when 0.25 release was made.
97-01-23: Fix InformixTest.pm so it works with perldoc. It seems that perldoc
does not like lines which start with a single quote. Thanks to
Jason Bodnar (jcbodnar@mail.utexas.edu) for pointing this problem
out. Add and use stmt_err to report errors or warnings, and document
it.
97-02-13: Version 0.50 released. Handle null database names on connect so
that CREATE DATABASE, etc, can be used. ESQL/C 5.0x has to handle
this by doing nothing (successfully) in dbd_ix_database(), but the
disconnect code needs to know that there is no database so it
doesn't try to close the current database. This requires interface
changes for dbd_ix_database() and dbd_ix_connect(). Add testing.
Thanks to Serge Davidov (serge@fcmc.com) for finding the problem.
You can also use DBI->connect('@server','','','Informix'), which
actually worked in v0.25. DBD::Informix is still confused, in
general, by statements such as CLOSE DATABASE.
--------------
Jonathan Leffler (johnl@informix.com)
@(#)ChangeLog 50.3 97/02/13 12:52:17