In enterprise applications built with SAP-UI5, working with large datasets is a common challenge. Whether you're displaying thousands of records in tables or charts, efficient handling of large volumes of data is critical to maintain a responsive user interface and optimal performance. This article explores the best practices and techniques for handling large datasets effectively in SAP-UI5 applications.
Loading and rendering large datasets naively can lead to several issues such as:
To overcome these challenges, SAP-UI5 offers multiple features and design patterns for efficient data handling.
SAP-UI5 commonly uses OData services to retrieve data. To avoid fetching the entire dataset at once, leverage OData query options such as:
$top: Limits the number of records returned.$skip: Skips a specified number of records.$filter: Filters data on the server side.$select: Retrieves only needed fields.oModel.read("/EntitySet", {
urlParameters: {
"$top": "50",
"$skip": "0",
"$filter": "Status eq 'Active'"
},
success: function(oData) {
// Process first page of 50 records
},
error: function(oError) {
// Handle error
}
});
This reduces the payload size and network traffic by retrieving only a subset of data.
For tables or lists, SAP-UI5 provides built-in support for growing mode and infinite scrolling to load data progressively.
<Table id="myTable" items="{/EntitySet}" growing="true" growingScrollToLoad="true" growingThreshold="50">
<columns>
<Column><Text text="ID"/></Column>
<Column><Text text="Name"/></Column>
</columns>
<items>
<ColumnListItem>
<cells>
<Text text="{ID}"/>
<Text text="{Name}"/>
</cells>
</ColumnListItem>
</items>
</Table>
This allows loading data in manageable chunks, improving initial load performance.
For smaller datasets that can be fully loaded on the client, implement client-side paging and sorting using JSON models with UI controls like sap.m.Table and sap.ui.table.Table.
However, client-side handling is not recommended for very large datasets due to memory and performance limits.
The sap.ui.table.Table control supports virtual scrolling where only the visible rows are rendered and updated dynamically as the user scrolls.
Configure row count and visible row settings carefully to optimize rendering performance.
To reduce the number of network calls when loading multiple datasets or performing multiple operations, use batch requests with deferred groups in OData models.
var oModel = new sap.ui.model.odata.v2.ODataModel("/sap/opu/odata/sap/ZMY_SERVICE_SRV/", { useBatch: true });
oModel.setDeferredGroups(["batchGroup1"]);
oModel.read("/EntitySet1", {
groupId: "batchGroup1",
success: function(oData) { /* ... */ }
});
oModel.read("/EntitySet2", {
groupId: "batchGroup1",
success: function(oData) { /* ... */ }
});
oModel.submitChanges({
groupId: "batchGroup1",
success: function() { /* ... */ }
});
Batching reduces server round-trips and improves overall performance.
Efficient handling of large datasets is a joint effort between frontend and backend:
$count for total record count.Handling large datasets in SAP-UI5 requires a thoughtful combination of server-side optimization and frontend UI techniques. By implementing server-side paging, growing tables, virtual scrolling, and batch requests, developers can build applications that scale gracefully and provide a seamless user experience.
Investing time in optimizing data handling not only improves performance but also enhances user satisfaction and application maintainability.