41 lines
		
	
	
		
			1.5 KiB
		
	
	
	
		
			Plaintext
		
	
	
	
		
		
			
		
	
	
			41 lines
		
	
	
		
			1.5 KiB
		
	
	
	
		
			Plaintext
		
	
	
	
|  | Access 97 tested through ODBC 1998.04.19, by monty@mysql.com | ||
|  | 
 | ||
|  | 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! | ||
|  | 
 | ||
|  | -------------- | ||
|  | 
 | ||
|  | Access 2000 tested through ODBC 2000.01.02, by monty@mysql.com | ||
|  | 
 | ||
|  | 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! |