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Exact and deleted recs - did everybody know this but me?
Message
From
24/07/2006 13:12:04
 
 
To
24/07/2006 12:14:07
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
01139176
Message ID:
01139274
Views:
11
See line 12 in the code. Deleted is set off. Did you try running the code below? I'd appreciate it, and if you get different results, please let me know.

>Well you do have SET DELETED OFF in your code.
>
>
>
>>I just discovered that SET EXACT and SET ANSI affect whether or not a SELECT SQL statement will return deleted records as deleted or not.
>>
>>Am I the only person who didn't know this?
>>
>>According to the VFP9 help file in fact, SET EXACT is supposed to have no effect on a SELECT SQL statement at all. SET ANSI is supposed to affect how strings are compared in a SELECT statement. And I can't find anything in the help file to explain how deleted records are treated by EXACT and ANSI.
>>
>>So why do they both affect how deleted records are retrieved?
>>
>>Here is an example of what I'm seeing.
>>
>>
>>CLOSE DATABASES all
>>
>>CREATE TABLE test (field1 c(1))
>>FOR x = 1 TO 10
>>  INSERT INTO test (field1) VALUES (chr(x+64))
>>ENDFOR
>>
>>GOTO 8
>>DELETE
>>
>>CLOSE DATABASES all
>>SET DELETED OFF
>>SET ANSI OFF
>>SET EXACT OFF
>>
>>WAIT WINDOW "Ansi off, Exact off" NoWait
>>SELECT * FROM test	&& browse should show record 8 as deleted
>>CLOSE DATABASES all
>>SET EXACT ON
>>
>>WAIT WINDOW "Ansi off, Exact ON" NoWait
>>SELECT * FROM test	&& browse should show no deleted records
>>CLOSE DATABASES all
>>SET EXACT OFF
>>SET ANSI ON
>>
>>WAIT WINDOW "Ansi ON, Exact off" NoWait
>>SELECT * FROM test	&& browse should show no deleted records
>>CLOSE DATABASES all
>>SET EXACT OFF
>>SET ANSI OFF
>>
>>WAIT WINDOW "Ansi off, Exact off" NoWait
>>SELECT * FROM test	&& browse should show record 8 deleted again
>>
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