g_ETLPipelineSteps_ReadCursor

attributes : stringThe list of attributes that the cursor passes on to the next step in the pipeline. Simple attributes, fields of complex attributes, and aggreate values can all be specified. Example A list of simple attributes: '(firstName lastName) A list with a complex attribute: '(firstName (homeAddress city)) A list defining an aggregate value: '(firstName (: totalHoldings (sum (@ holdings value))))batchSize : stringExpression specifying the number of records to include in each batch of data. Example 2000 and (* 20 100) are both valid values.caption : stringString identifier for caption display in the UI.class : stringThe class object that the cursor will read.description : stringA description for this cursor. This text is displayed as an element note in the ETL diagram.layout : stringThis attribute captures the UI layout information for rendering the model in the editor. The values change as users moves the element in the editor.name : stringThe cursor name. This name is diplayed on the diagram.orderBy : stringA Scheme expression that controls the sorting of the data the cursor passes. The syntax of the expression is '(((first_sort_dimension) . #t) ((second_sort_dimension) . #t) ((nth_sort_dimension) . #t)) Use #t to sort in ascending order, and #f to specify a descending order. Example A cursor reads from the Person class with the following order by information: '(((@ homeAddress city) . #t) ((@ firstName) . #t)) The data is sorted first by the city name in the complex homeAddress attribute, then by the person's first name.where : stringAn expression to restrict the set of class instances that the cursor reads. Example The Where clause '(= (@ firstName) "Joe") restricts the cursor to reading only from those classes whose firstName attribute is "Joe".