Omron CX-SUPERVISOR - SCRIPT REFERENCE REV2.0 Reference Manual page 130

OMRON
Note: Some Providers do not support moving in the "Previous" direction i.e. cursors are
'Forward-Only'. Some 'Forward-Only' providers do allow moving "First", while
some are strictly Forward-Only i.e. the Recordset has to be Re-queried effectively a
combined Close then Open operation to reset the cursor back to the start of the
Recordset. Some Providers that do support moving "Previous" do not support moving
to "Position". However, in order to be consistent, CX-Supervisor ensures that that all
operations (except "Bookmarks") will work for any connection to any provider but you
need to bear in mind when designing applications that use 'Forward-Only' cursors, that
there may be some 'long-winded' acrobatics being performed behind the scenes. See
DBSupports() for details of how to check the type of cursor in force.
Note: Bookmarks will only work if specifically supported by the Provider.
DBOpen
Description
Opens a Connection or Recordset. Opening a Connection will automatically open all recordsets
associated with it, that are marked as auto open. Recordsets can be opened in isolation by selecting
the appropriate level.
Syntax
returnstate = DBOpen(level)
Remarks
Argument
returnstate
level
Typical Examples
DBOpen("Northwind")
Open the connection to the Northwind database, and automatically open any Recordsets set to open
on connection.
done = DBOpen("Northwind.Order Details")
Just open a specific Recordset.
Revision 2.0
Type
bool 1 if the function is successful otherwise 0
text A text point or constant specifying the connection level. This
may be a Connection or Recordset level.
CHAPTER 6 – Functions and Methods
Description
Page 117