Databases
StackOverflow2013
Postsdbo
POWhy extremely occasionally will one of bof/eof be true for a new non-empty recordset
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POWhy extremely occasionally will one of bof/eof be true for a new non-empty recordset
    primarykey
    data
    text
    <pre><code> set recordsetname = databasename.openrecordset(SQLString) if recordsetname.bof &lt;&gt; true and recordsetname.eof &lt;&gt; true then 'do something end if </code></pre> <p>2 questions :</p> <ol> <li><p>the above test can evaluate to false incorrectly but only extremely rarely (I've had one lurking in my code and it failed today, I believe for the first time in 5 years of daily use-that's how I found it). Why very occasionally will one of bof/eof be true for a non-empty recordset. It seems so rare that I wonder why it occurs at all.</p></li> <li><p>Is this a foolproof replacement:</p> <pre><code>if recordsetname.bof &lt;&gt; true or recordsetname.eof &lt;&gt; true then </code></pre></li> </ol> <p><strong>Edit to add details of code :</strong></p> <p>Customers have orders, each order begins with a <code>BeginOrder</code> item and end with an <code>EndOrder</code> item and in between are the items in the order.</p> <p>The SQL is:</p> <pre><code>' ids are autoincrement long integers ' SQLString = "select * from Orders where type = OrderBegin or type = OrderEnd" Dim OrderOpen as Boolean OrderOpen = False Set rs = db.Openrecordset(SQLString) If rs.bof &lt;&gt; True And rs.eof &lt;&gt; True Then myrec.movelast If rs.fields("type").value = BeginOrder Then OrderOpen = True End If End If If OrderOpen F False Then 'code here to add new BeginOrder Item to Orders table ' End If ShowOrderHistory 'displays the customer's Order history ' </code></pre> <p>In this case which looks this this</p> <pre><code>BeginOrder Item a Item b ... Item n EndOrder BeginOrder Item a Item b ... Item n EndOrder BeginOrder Item a item b ... Item m BeginOrder &lt;----should not be there as previous order still open </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USRenaud Bompuis
    1. USjjb
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POWhy extremely occasionally will one of bof/eof be true for a new non-empty recordset
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POWhy extremely occasionally will one of bof/eof be true for a new non-empty recordset
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhat's in your SQLSTRING?
      singulars
      1. POWhy extremely occasionally will one of bof/eof be true for a new non-empty recordset
      1. USNotMe
    2. COIt's just a simple select on a single table that in the case it failed on did/should have returned about a dozen records.
      singulars
      1. POWhy extremely occasionally will one of bof/eof be true for a new non-empty recordset
      1. USjjb
    3. CO"one of bof/eof be true" -- do you mean xor ("bit-wise comparison of two expressions using exclusive-or logic") i.e. one is true and the other is false?
      singulars
      1. POWhy extremely occasionally will one of bof/eof be true for a new non-empty recordset
      1. USonedaywhen
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload