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Can this be simplified?
Message
From
22/11/2018 14:56:00
 
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
01663691
Message ID:
01663695
Views:
67
Likes (1)
>>>Hi,
>>>
>>>I have many places in my app where I use the following expression in the WHERE clause of the SQL Select. It works but what bothers me is that the expression has DTOC() and then CTOD(). I convert a date to a character and then convert the character back to date. Can it be simplified? Here is the expression:
>>>
>>>"MYTABLE.DATE_FLD >= CTOD('" + DTOC( dDateValue ) + "')"
>>>
>>>
>>>TIA
>>
>>What's wrong with
>>
>>  MYTABLE.DATE_FLD >= dDateValue
>>
>>
>>Just make sure that dDateValue variable is in scope.
>
>But I have to have this expression in the SQL Select expression. Here is an example (simplified):
>
>cWhereExpr = "MYTABLE.DATE_FLD >= CTOD('" + DTOC( dDateValue ) + "')"
>cSqlSelect = " select * from mytable where " + cWhereExpr
>
If you're passing cSqlSelect into SQLEXEC() then:
cWhereExpr = "MYTABLE.DATE_FLD >= ?dDateValue"
cSqlSelect = " select * from mytable where " + cWhereExpr
...
nRetVal = SQLEXEC(nCon, cSqlSelect, "csrResult")
As Borislav stated, make sure that dDateValue is in scope when the SQLEXEC() is executed.

If cSqlSelect is going be macro-expanded into a statement within VFP then Borislav's suggestion should work.
&cSqlSelect.
* above expands to:  select * from mytable where  MYTABLE.DATE_FLD >= dDateValue
As Borislav stated, make sure that dDateValue is in scope when the macro expansion takes place.
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