Hi Prashant,

Greetings to you!

Please try the below code, I have tested in my org and it is working fine. Kindly modify the code as per your requirement.

Apex:

public class DisplayOpenCasesC {
    
    @AuraEnabled 
    public static List<Case> getOpenCases(){
        List<Case> caseList=new List<Case>();
        caseList = [SELECT Id, CaseNumber, Subject, Type, Status FROM Case WHERE OwnerId =:UserInfo.getUserId() AND Status!='Closed'];
        return caseList;
    } 
}

Component:

<aura:component controller="DisplayOpenCasesC"
                implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes,force:lightningQuickAction" access="global" >
    
    <aura:attribute name="data" type="Object"/>
    <aura:attribute name="columns" type="List[]"/>
    
    <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>
    
    <lightning:datatable aura:id="casetable"
                         keyField="Id"
                         data="{!v.data}"
                         columns="{!v.columns}"
                         hideCheckboxColumn="true"/>
</aura:component>

Controller:

({
    doInit : function(component, event, helper) {
        component.set('v.columns', [
            {label: 'Case Number', fieldName: 'CaseNumber', editable: true, type: 'text'},
            {label: 'Subject', fieldName: 'Subject', editable: true, type: 'text'},
            {label: 'Type', fieldName: 'Type', editable: true, type: 'text'},
            {label: 'Status', fieldName: 'Status', editable: true, type: 'text'}
        ]);
        var action=component.get('c.getOpenCases');
        action.setCallback(this, function(response){
            var state = response.getState();
            if (state === "SUCCESS") {
                var rows = response.getReturnValue();
                component.set("v.data", rows);
                
            }
        });
        $A.enqueueAction(action);
    }
})

Application:

<aura:application extends="force:slds">
    <c:DisplayOpenCases/>
</aura:application>

I hope it helps you.

Kindly let me know if it helps you and close your query by marking it as solved so that it can help others in the future. It will help to keep this community clean.

Thanks and Regards,
Khan Anas