access.comment

apache windows下的一款好

Access 97 tested through ODBC 1998.04.19, by [e-mail]

Access 97 has a bug when on executes a SELECT follwed very fast with a
DROP TABLE or a DROP INDEX command:

[Microsoft][ODBC Microsoft Access 97 Driver] The database engine couldn't lock table 'crash_q' because it's already in use by another person or process. (SQL-S1
000)(DBD: st_execute/SQLExecute err=-1)

Debugging SQL queries in Access 97 is terrible because most error messages
are of type:

Error: [Microsoft][ODBC Microsoft Access 97 Driver] Syntax error in CREATE TABLE statement. (SQL-37000)(DBD: st_prepare/SQLPrepare err=-1)

Which doesn't tell a thing!

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Access 2000 tested through ODBC 2000.01.02, by [e-mail]

crash-me takes a LONG time to run under Access 2000.

The '1+NULL' and the 'OR and AND in WHERE' tests kills
Activestate Perl, build 521, DBI-DBC with an OUT OF MEMORY error.  
The later test also kills perl/access with some internal errors.
To go around this one must run crash-me repeatedly with the --restart option.

Testing of the 'constant string size' (< 500K) takes a LOT of memory
in Access (at least 250M on My computer).

Testing of number of 'simple expressions' takes REALLY a lot of time
and memory;  At some point I was up to 350M of used memory!

To fix the above, I modified crash-me to have lower max limits in the
above tests.

Benchmarks (under Win98):

Running the connect-test will take up all available memory and this
will not be freed even after quitting perl!  There is probably some
bug in the Access connect code that eats memory!