Library: Database access (OMDB) Import: omdb.xmd

Declaration

define external  function db.move-record
       read-only db.field  record

Argument definitions

record

is a db.field shelf bound to a record set created by a SQL query

Use db.move-record to advance the data cursor within the specified record set.

Requirements

The database connection represented by db.database must be

• open (else external exception OMDB209).
• in scope (else external exception OMDB103).

The db.field shelf must be associated with a query (else external exception OMDB302).

The db.field shelf record must exist.

Usage Notes

The data cursor points to the currently active row of the record set. This function advances the cursor to the next row of the record set.

You can move the data cursor beyond the record set boundaries. However, if you attempt to retrieve a field value in this situation, external exception OMDB205 will be thrown. Before attempting to retrieve field values, you should use the db.record-exists function to verify that the data cursor is within the record set boundaries.

This function works on result sets created with either static or dynamic cursors. However, using a static cursor is recommended, as it is substantially more efficient than a dynamic cursor.

Example

        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

Related Topics Using the OMDB library db.query db.record-exists db.reader db.field db.compile-statement db.move-dynamic-record

Other Library Functions db.advance-recordset db.close db.commit db.compile-statement db.database db.delete db.discard db.document-writer-sedna db.execute db.execute-in db.field db.insert db.is-null db.move-dynamic-record db.move-record db.omdb-version db.omdb-version-oci10g db.omdb-version-oci11g db.omdb-version-oci8i db.omdb-version-oci9i db.omdb-version-odbc db.omdb-version-sedna db.open-oci10g db.open-oci11g db.open-oci8i db.open-oci9i db.open-odbc db.open-procedure db.open-sedna db.open-table db.prepare db.procedure db.query db.reader db.record-exists db.rollback db.set-transaction-type db.statement db.streaming-execute db.table db.update db.writer

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