Symptoms
When executing an ODBC query against Visual FoxPro tables using the Visual FoxPro ODBC Driver, no records are returned when the WHERE clause includes a date that is not in AMERICAN date format.
Cause
The Visual FoxPro ODBC Driver only accepts dates in a strict AMERICAN date format.
Resolution
Convert any dates that are passed in WHERE clause of the SELECT-SQL statement to an AMERICAN date format.
Status
This behavior is by design.
More Information
The default Visual FoxPro date setting is AMERICAN. Date formats, however, may be set to the following formats:
|
Date Setting |
Date Format |
|---|---|
|
AMERICAN |
mm/dd/yy |
|
ANSI |
yy.mm.dd |
|
BRITISH/FRENCH |
dd/mm/yy |
|
GERMAN |
dd.mm.yy |
|
ITALIAN |
dd-mm-yy |
|
JAPAN |
yy/mm/dd |
|
TAIWAN |
yy/mm/dd |
|
USA |
mm-dd-yy |
|
MDY |
mm/dd/yy |
|
DMY |
dd/mm/yy |
|
YMD |
yy/mm/dd |
|
SHORT |
Short date format determined by the Windows Control Panel short date setting. |
|
LONG |
Long date format determined by the Windows Control Panel long date setting. |
Steps to Reproduce Behavior
-
Create a program file named "Odbctest.prg," using the following code:
CLEAR
DO CASE
CASE "6.0"$VERSION()
lcConnStr="DRIVER={Microsoft Visual FoxPro Driver};" + ;
"Exclusive=No;SourceType=DBF;SourceDB="+HOME(2)+"DATA"
CASE "5.0"$VERSION()
lcConnStr="DRIVER={Microsoft Visual FoxPro Driver};" + ;
"Exclusive=No;SourceType=DBF;SourceDB="+HOME()+"SAMPLES\DATA"
CASE "3.0"$VERSION()
lcConnStr="DRIVER={Microsoft Visual FoxPro Driver};" + ;
"Exclusive=No;SourceType=DBF;SourceDB="+HOME()+"SAMPLES\DATA"
OTHERWISE && Version is VFP 7.0,8.0, or 9.0
lcConnStr="DRIVER={Microsoft Visual FoxPro Driver};" + ;
"Exclusive=No;SourceType=DBF;SourceDB="+HOME(2)+"DATA"
ENDCASE
*!* Create An ADO Connection
oConnection=CREATEOBJECT("ADODB.Connection")
oConnection.ConnectionString = lcConnStr
oConnection.CursorLocation = 3
oConnection.OPEN
* lcSQL="SELECT * FROM ORDERS WHERE ORDER_DATE < {07/22/93}"
lcSQL="SELECT * FROM ORDERS WHERE ORDER_DATE < {93/07/22}"
*!* Create An ADO recordset
rs=CREATEOBJECT("ADODB.Recordset")
rs.activeconnection = oConnection
rs.CursorLocation = 3
rs.cursortype = 1
rs.LockType = 3
rs.OPEN(lcSQL)
IF !rs.EOF
rs.movefirst
DO WHILE !rs.EOF
? rs.FIELDS(0).VALUE
rs.movenext
ENDDO
ENDIF
rs.CLOSE
oConnection.CLOSE -
Observe that no records are returned or displayed.
-
Comment the following line of code:
lcSQL="SELECT * FROM ORDERS WHERE ORDER_DATE < {93/07/22}" -
Uncomment the following line of code:
lcSQL="SELECT * FROM ORDERS WHERE ORDER_DATE < {07/22/93}" -
Re-run the program and observe that data are returned and displayed on the screen.
