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Related Topics | Other Library Functions |
function |
db.record-exists |
Library: Database access (OMDB)
Import: omdb.xmd |
Return type: Switch Returns: TRUE if the data cursor points to a valid row, or FALSE otherwise. |
define external switch function db.record-exists read-only db.field record
Argument definitions
Use db.record-exists to check whether or not the data cursor is positioned on an existing row.
The data cursor points to the record set's currently active row.
The function uses a db.field shelf variable in which a db.query, db.execute or db.streaming-execute stored the record set.
repeat exit unless db.record-exists my-query repeat over my-query output db.reader of my-query null '-DNF-' output '%t' when ! #last again output '%n' db.move-record my-query again
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