how to update table or model on button click

I have one table on hana DB, exposed it as xsodata service

service  {    "schema"."table" as "OrderItem";  }

showing the in ui5 app as

var Model = new sap.ui.model.json.JSONModel("../../services/myexp.xsodata/OrderItem", false);
sap.ui.getCore().setModel(Model,'myitem');
var oTemplate = new sap.m.ColumnListItem({        cells : [            new sap.m.Text({                text : "{myitem>Component}"            }),            new sap.m.Text({                text : "{myitem>Customer}"            }),            new sap.m.Text({                text: "{myitem>Required Date}"            }),            new sap.m.Text({                text : "{myitem>Status}"            })        ]    });
oTable.bindItems("myitem>/d/results", oTemplate);

Working fine

Now as in image I have two buttons added at the page footer as

footer: new sap.m.Bar({                contentRight: [                    new sap.m.Button({                    text: "Accept",                    type: sap.m.ButtonType.Accept                  }),                new sap.m.Button({                    text: "Reject ",                    type: sap.m.ButtonType.Reject ,                   })                ]
})

now my question is how to update the Status column on click of any button, say If i press accept status will change to accepted and same with reject. (updating the model. I guess hana table will automatically update as tyhe table is expossed as odata model)

note this table will have only one row.

Thank you