How to Create Dynamic Structure in SAP ABAP Using Runtime Techniques

Introduction

SAP ABAP (Advanced Business Appreciation Programming) provides the foundation of enterprise application development using the SAP platform. Of all the programming techniques available in ABAP, structures are among the most essential and widely used elements. From basic data containers to complex runtime-generated objects, they are the basis of everything — from database access layers through ALV reports, BAPIs, and RESTful APIs.

Whether you are a novice unsure of how to create a structure in SAP ABAP, or a seasoned consultant trying to master dynamic structure design using RTTS, this guide covers all you need to know — with real-world code examples, step-by-step instructions, and expert best practices.

What Is a Structure in SAP ABAP?

A structure in SAP ABAP is a composite data type that groups various fields — each with potentially different data types — into one named object. If you imagine an actual database table, a structure is one row in that table. It holds related pieces of data together and makes it simple to transfer information between functions, program modules, BAPIs, methods, and functions.

Structures are distinct from internal tables (which contain many rows) and elementary types (which hold a single value). They sit at the intersection of a single row with several columns.

Why Structures Are Important in ABAP Development

• Data passing — structures serve as the main means of sending complex data between methods, function modules, and remote functions (RFCs).
• Database interaction — when you use SELECT SINGLE or work in work areas, you are dealing with structures.
• ALV Reports — field catalogs and work zones in ALV grids are structured.
• BAPIs and IDocs — standard SAP interfaces rely heavily on globally defined structures.
• Dynamic programming — runtime-generated structures power generic frameworks and tools.

Understanding the full scope of how to design structures in SAP ABAP — from static to dynamic — is what differentiates the ordinary ABAP programmer from a competent one.

Difference Between a Structure and an Internal Table in SAP ABAP

Before going further, it is important to clarify the difference between internal tables and structures, as beginners often confuse the two.

Feature	Structure	Internal Table
Rows	Single row	Multiple rows
Declaration keyword	TYPES: BEGIN OF ... END OF	TYPE TABLE OF
Usage	Parameter passing, work area	Looping, data storage
Memory	Fixed (one row)	Dynamic (grows by incorporating data)
Access to fields	ls_struct-fieldname	Index or loop access

A structure is usually used as the work area for an internal table — a one-row buffer that you use to read from or write to the internal table.

How to Create a Local Structure in SAP ABAP

A locally defined structure is only available within the boundaries of the ABAP program, report, or class in which it is described. It is not included in the ABAP Dictionary and cannot be reused in other programs.

When to Use Local Structures:

• Manipulating data within a single program
• Intermediate results that do not need to be shared
• Rapid prototyping before converting to global structures

Syntax and Example:

TYPES: BEGIN OF ty_employee,
  emp_id    TYPE matnr,
  emp_name  TYPE string,
  salary    TYPE p DECIMALS 2,
  join_date TYPE d,
END OF ty_employee.

DATA: ls_employee TYPE ty_employee,
      lt_employees TYPE TABLE OF ty_employee.
" Fill in the structure
ls_employee-emp_id    = 'E001'.
ls_employee-emp_name  = 'John Doe'.
ls_employee-dept      = 'Information Technology'.
ls_employee-salary    = 75000.00.
ls_employee-join_date = '20230101'.
" Append to internal table
APPEND ls_employee TO lt_employees.
" Review and display
READ TABLE lt_employees INTO ls_employee INDEX 1.
WRITE: / ls_employee-emp_name, ls_employee-salary.

Local Structure Using DATA...BEGIN OF:

DATA: BEGIN OF ls_order,
  order_id  TYPE vbeln,
  customer  TYPE kunnr,
  order_date TYPE erdat,
  amount    TYPE netwr,
END OF ls_order.

ls_order-order_id  = '0000012345'.
ls_order-customer  = '0001000001'.
ls_order-amount    = 5000.00.

Understanding how to build local structures in SAP ABAP gives you the ability to manage data changes quickly within the confines of a single application.

How to Create a Global Structure in SAP ABAP

A global structure is defined in the SAP ABAP Dictionary (transaction SE11) and is accessible across all ABAP programs, function modules, classes, and database tables within the system. This makes it the preferred option for enterprise-level, reusable data definitions.

Step-by-Step: Creating a Global Structure in SE11

1. Start transaction SE11 (ABAP Dictionary).
2. On the initial screen, choose the "Data Type" radio button and give it a name, e.g., ZEMPLOYEE_STRUC. Always use the Z or Y namespace to identify custom objects.
3. Click "Create". In the popup, click "Structure" and confirm.
4. Add a short description (e.g., "Employee Master Structure").
5. Include fields on the Components tab:

Component	Type	Data Element / Type
EMP_ID	Type	MATNR
EMP_NAME	Type	AD_NAMTEXT
DEPT	Type	STRING
SALARY	Type	NETWR
JOIN_DATE	Type	ERDAT

1. Select the "Activate" button (Ctrl+F3) to enable the structure.

Using the Global Structure in ABAP Code:

DATA: ls_emp  TYPE zemployee_struc,
      lt_emps TYPE TABLE OF zemployee_struc.

ls_emp-emp_id   = 'E002'.
ls_emp-emp_name = 'Jane Smith'.
ls_emp-dept     = 'Finance'.
ls_emp-salary   = 92000.00.
APPEND ls_emp TO lt_emps.

Advantages of Global Structures:

• Reusable across functions, programs, modules, and classes
• Centralized maintenance — updates are reflected everywhere
• Transport-ready — can be moved across development landscapes
• Dictionary-level documentation allows field-level descriptions and helps with search

How to Create an Include Structure in SAP ABAP

An include structure lets you place one structure's fields inside another structure. Instead of repeating fields across different structures, you define them once in a separate "include" structure and reference it wherever needed.

Why Use Include Structures?

• Promotes the DRY (Don't Repeat Yourself) principle
• Simplifies maintenance — change the include, and all parent structures reflect the update
• Used extensively in SAP standard tables (e.g., MARA, VBAK, EKPO)

Creating an Include Structure in SE11:

1. Create a new structure in SE11 called ZADDRESS_INC.
2. Include fields: STREET, CITY, STATE, COUNTRY, ZIPCODE.
3. Activate it.

Using the Include Structure in Another Structure:

" In SE11, within ZCUSTOMER_STRUC:
" Add a component with type STRUCTURE and reference ZADDRESS_INC.
" This embeds every address field directly into the customer structure.

" In ABAP code:
DATA: ls_customer TYPE zcustomer_struc.
ls_customer-cust_id = 'C001'.
ls_customer-name    = 'Acme Corp'.
ls_customer-city    = 'Pune'.     " From ZADDRESS_INC
ls_customer-country = 'IN'.       " From ZADDRESS_INC

Include Structure in Local Type Definitions:

TYPES: BEGIN OF ty_vendor,
  vendor_id TYPE lifnr,
  name      TYPE string,
  INCLUDE TYPE zaddress_inc AS address,
END OF ty_vendor.

DATA: ls_vendor TYPE ty_vendor.
ls_vendor-address-city = 'Mumbai'.

The AS keyword gives the include group an alias, which is useful when accessing fields programmatically. Learning how to construct an include structure in SAP ABAP allows you to build modular, maintainable data models that are simple to expand.

How to Create an Append Structure in SAP ABAP

An append structure is a special SAP technique that lets you add custom fields to an existing SAP database table or structure without altering the original object. This is SAP's recommended method for modification.

Why Append Structures Matter:

• SAP upgrades can alter standard table definitions — append structures survive upgrades
• They follow SAP's modification-free enhancement principle
• Mandatory for SAP certification compliance and official customization guidelines

Step-by-Step: How to Create an Append Structure in SAP ABAP

1. Start SE11 and type the name of the table you want to enhance, e.g., MARA (Material Master).
2. Select menu: Extras → Append Structures.
3. In the dialogue box, click "Create append".
4. Give a name for your append structure, e.g., ZMARA_CUSTOM_APPEND.
5. Create your custom fields. Always use ZZ or YY prefix to prevent namespace conflicts:

Field Name	Data Element
ZZ_CUSTOM_RATING	AD_PRIORITY
ZZ_APPROVAL_FLAG	XFELD
ZZ_CREATED_BY	USNAM

1. Activate the structure — it is now part of MARA.

Using Append Structure Fields in ABAP:

DATA: ls_mara TYPE mara.

SELECT SINGLE * FROM mara INTO ls_mara
  WHERE matnr = '000000000000001234'.
" Access custom append field
WRITE: / ls_mara-zz_custom_rating.
ls_mara-zz_approval_flag = 'X'.
UPDATE mara FROM ls_mara.

Golden Rules for Append Structures:

• One append per development object (you may add more fields to an existing append)
• Do not use standard SAP field name prefixes
• Transport append structures using regular change requests
• Append structures are not supported on cluster or pooled tables

How to Create a Deep Structure in SAP ABAP

A deep structure in ABAP contains at least one element that itself has complexity — like a nested structure, an internal table, a string, or an ABAP reference variable. Deep structures contrast with flat ones, which are made up only of basic types.

Flat vs. Deep Structure:

Type	Contains	Example Use Case
Flat Structure	Only basic types (C, N, D, T, P, I)	Database table rows
Deep Structure	Strings, internal tables, nested structures	JSON object, API payload

Example: Creating a Deep Structure

" Define nested address structure
TYPES: BEGIN OF ty_address,
  street  TYPE string,
  city    TYPE string,
  state   TYPE string,
  zipcode TYPE char10,
  country TYPE char3,
END OF ty_address.

" Define nested order item
TYPES: BEGIN OF ty_order_item,
  item_no  TYPE posnr,
  material TYPE matnr,
  quantity TYPE menge_d,
  unit     TYPE meins,
  price    TYPE netwr,
END OF ty_order_item.
" Deep structure with nested structure and internal table
TYPES: BEGIN OF ty_sales_order,
  order_id  TYPE vbeln,
  customer  TYPE kunnr,
  order_date TYPE erdat,
  ship_to   TYPE ty_address,                         " Nested structure
  items     TYPE TABLE OF ty_order_item WITH EMPTY KEY, " Internal table
  notes     TYPE string,                             " Deep (string)
END OF ty_sales_order.
DATA: ls_order TYPE ty_sales_order,
      ls_item  TYPE ty_order_item.
" Populate header
ls_order-order_id         = '0000098765'.
ls_order-customer         = '0001002345'.
ls_order-ship_to-city     = 'Bengaluru'.
ls_order-ship_to-country  = 'IND'.
ls_order-notes            = 'Priority shipping required'.
" Add items
ls_item-item_no  = '000010'.
ls_item-material = 'LAPTOP-001'.
ls_item-quantity = 5.
ls_item-unit     = 'EA'.
ls_item-price    = 55000.00.
APPEND ls_item TO ls_order-items.

Important Limitations of Deep Structures:

• Cannot be saved directly in database tables — SAP's database layer supports only flat types
• Must be flattened (serialized) before database persistence
• Deep structures work well with CL_ABAP_CORRESPONDING, MOVE-CORRESPONDING, and JSON serialization

Deep Structures Using JSON Serialization (Modern ABAP):

" Serialize deep structure to JSON
DATA(lo_writer) = cl_sxml_string_writer=>create( type = if_sxml=>co_xt_json ).

CALL TRANSFORMATION id
  SOURCE order = ls_order
  RESULT XML lo_writer.
DATA(lv_json) = cl_abap_codepage=>convert_from( lo_writer->get_output( ) ).
WRITE: / lv_json.

How to Create Dynamic Structure in SAP ABAP Using Runtime Techniques

A dynamically created structure is one built and executed at runtime, when the structure layout is not established at compile time. This is done through the SAP RTTS (Runtime Type Services) framework, specifically the class CL_ABAP_STRUCTDESCR.

Why Use Dynamic Structures?

• Building generic reports with columns derived from configuration
• Creating framework tools that can work on any table structure
• Implementing data migration tools that handle arbitrary source layouts
• Building flexible BAPIs or middleware that adapts to various schemas

The RTTS Framework: Key Classes

Class	Role
CL_ABAP_TYPEDESCR	Root class — introspects any type
CL_ABAP_ELEMDESCR	Explains and creates basic types
CL_ABAP_STRUCTDESCR	Creates and describes structure types
CL_ABAP_TABLEDESCR	Creates internal table types
CL_ABAP_CLASSDESCR	Describes class types
CL_ABAP_DATADESCR	Base for data types

Full Example: Create Dynamic Structure in SAP ABAP

REPORT zdynamic_structure_demo.

DATA: lo_elem_desc   TYPE REF TO cl_abap_elemdescr,
      lo_struct_desc TYPE REF TO cl_abap_structdescr,
      lt_components  TYPE cl_abap_structdescr=>component_table,
      ls_component   TYPE cl_abap_structdescr=>component,
      lo_data        TYPE REF TO data.
FIELD-SYMBOLS: <fs_struct> TYPE any,
               <fs_field>  TYPE any.
" ---- Step 1: Define fields dynamically ----
" Field 1: EMP_ID (Character, length 10)
ls_component-name = 'EMP_ID'.
lo_elem_desc = cl_abap_elemdescr=>get_c( p_length = 10 ).
ls_component-type = lo_elem_desc.
APPEND ls_component TO lt_components.
CLEAR ls_component.
" Field 2: EMP_NAME (String)
ls_component-name = 'EMP_NAME'.
lo_elem_desc = cl_abap_elemdescr=>get_string( ).
ls_component-type = lo_elem_desc.
APPEND ls_component TO lt_components.
CLEAR ls_component.
" Field 3: SALARY (Packed decimal, 8 digits, 2 decimals)
ls_component-name = 'SALARY'.
lo_elem_desc = cl_abap_elemdescr=>get_p( p_length = 8 p_decimals = 2 ).
ls_component-type = lo_elem_desc.
APPEND ls_component TO lt_components.
CLEAR ls_component.
" Field 4: JOIN_DATE (Date)
ls_component-name = 'JOIN_DATE'.
lo_elem_desc = cl_abap_elemdescr=>get_d( ).
ls_component-type = lo_elem_desc.
APPEND ls_component TO lt_components.
CLEAR ls_component.
" ---- Step 2: Create structure type from components ----
lo_struct_desc = cl_abap_structdescr=>create( lt_components ).
" ---- Step 3: Create data reference and assign to field symbol ----
CREATE DATA lo_data TYPE HANDLE lo_struct_desc.
ASSIGN lo_data->* TO <fs_struct>.
" ---- Step 4: Set values using ASSIGN COMPONENT ----
ASSIGN COMPONENT 'EMP_ID' OF STRUCTURE <fs_struct> TO <fs_field>.
IF sy-subrc = 0.
  <fs_field> = 'E005'.
ENDIF.
ASSIGN COMPONENT 'EMP_NAME' OF STRUCTURE <fs_struct> TO <fs_field>.
IF sy-subrc = 0.
  <fs_field> = 'Ravi Kumar'.
ENDIF.
ASSIGN COMPONENT 'SALARY' OF STRUCTURE <fs_struct> TO <fs_field>.
IF sy-subrc = 0.
  <fs_field> = 88000.
ENDIF.
ASSIGN COMPONENT 'JOIN_DATE' OF STRUCTURE <fs_struct> TO <fs_field>.
IF sy-subrc = 0.
  <fs_field> = sy-datum.
ENDIF.
" ---- Step 5: Display values ----
ASSIGN COMPONENT 'EMP_NAME' OF STRUCTURE <fs_struct> TO <fs_field>.
WRITE: / 'Employee:', <fs_field>.
ASSIGN COMPONENT 'SALARY' OF STRUCTURE <fs_struct> TO <fs_field>.
WRITE: / 'Salary:', <fs_field>.

Dynamic Internal Table Derived from Dynamic Structure:

" Create a dynamic internal table based on the dynamic structure
DATA: lo_table_desc TYPE REF TO cl_abap_tabledescr,
      lo_table      TYPE REF TO data.

FIELD-SYMBOLS: <fs_table> TYPE STANDARD TABLE,
               <fs_row>   TYPE any.
lo_table_desc = cl_abap_tabledescr=>create(
  p_line_type  = lo_struct_desc
  p_table_kind = cl_abap_tabledescr=>tablekind_std
  p_unique     = abap_false ).
CREATE DATA lo_table TYPE HANDLE lo_table_desc.
ASSIGN lo_table->* TO <fs_table>.
" Add a dynamic row to the table
CREATE DATA lo_data TYPE HANDLE lo_struct_desc.
ASSIGN lo_data->* TO <fs_row>.
ASSIGN COMPONENT 'EMP_ID' OF STRUCTURE <fs_row> TO <fs_field>.
IF sy-subrc = 0.
  <fs_field> = 'E006'.
ENDIF.
APPEND <fs_row> TO <fs_table>.
WRITE: / 'Rows of dynamic table:', lines( <fs_table> ).

This is at the heart of how you build dynamic structures in SAP ABAP — an approach used in the most sophisticated ABAP toolkits, frameworks, and platforms.

How to Create a Field Catalog from Structures in SAP ABAP

A field catalog (fieldcat) is a metadata table that defines the columns in an ALV grid report, including their names, labels, output lengths, data types, and display properties. Without a field catalog, the ALV grid cannot render columns properly.

Method 1: Auto-Generate Using LVC_FIELDCATALOG_MERGE

This function module reads a global structure from the ABAP Dictionary and builds the field catalog automatically.

DATA: lt_fcat TYPE lvc_t_fcat.

CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
  EXPORTING
    i_structure_name  = 'ZEMPLOYEE_STRUC'
    i_bypassing_buffer = abap_true
  CHANGING
    ct_fieldcat       = lt_fcat
  EXCEPTIONS
    inconsistent_interface = 1
    program_error          = 2
    OTHERS                 = 3.
IF sy-subrc <> 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
    WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.

Method 2: Manual Field Catalog Construction

For custom or dynamic scenarios, create the field catalog by hand:

DATA: lt_fcat TYPE lvc_t_fcat,
      ls_fcat TYPE lvc_s_fcat.

" Field 1
ls_fcat-fieldname = 'EMP_ID'.
ls_fcat-coltext   = 'Employee ID'.
ls_fcat-outputlen = 10.
ls_fcat-key       = abap_true.
APPEND ls_fcat TO lt_fcat.
CLEAR ls_fcat.
" Field 2
ls_fcat-fieldname = 'EMP_NAME'.
ls_fcat-coltext   = 'Employee Name'.
ls_fcat-outputlen = 30.
APPEND ls_fcat TO lt_fcat.
CLEAR ls_fcat.
" Field 3
ls_fcat-fieldname = 'SALARY'.
ls_fcat-coltext   = 'Monthly Salary'.
ls_fcat-outputlen = 15.
ls_fcat-datatype  = 'CURR'.
ls_fcat-cfieldname = 'CURRENCY'.
APPEND ls_fcat TO lt_fcat.
CLEAR ls_fcat.

Method 3: Generate a Field Catalog from a Dynamic Structure (Advanced)

" Get components of the dynamic structure created earlier
DATA: lt_comp TYPE cl_abap_structdescr=>component_table,
      ls_comp TYPE cl_abap_structdescr=>component.

lt_comp = lo_struct_desc->get_components( ).
LOOP AT lt_comp INTO ls_comp.
  CLEAR ls_fcat.
  ls_fcat-fieldname = ls_comp-name.
  ls_fcat-coltext   = ls_comp-name.
  ls_fcat-outputlen = 20.
  APPEND ls_fcat TO lt_fcat.
ENDLOOP.

This is a crucial step for fully dynamic ALV reports, where both the structure and field catalog are built at runtime.

Combining Dynamic Structures and Field Catalogs in ALV Display

The most powerful aspect of dynamic ABAP programming is combining the runtime-built structure, a dynamically created field catalog, and the ALV grid to generate a highly flexible, configurable report.

" Full dynamic ALV pattern:
" 1. Collect column configs from Z-table
" 2. Create component table from the configuration
" 3. Create dynamic structure using CL_ABAP_STRUCTDESCR
" 4. Create dynamic internal table using CL_ABAP_TABLEDESCR
" 5. Select data dynamically using dynamic WHERE clauses
" 6. Create field catalog from structure components
" 7. Display using CL_GUI_ALV_GRID

DATA: lo_alv    TYPE REF TO cl_gui_alv_grid,
      lo_custom TYPE REF TO cl_gui_custom_container.
" (Assuming dynamic structure and field catalog already built as shown above)
lo_custom = NEW cl_gui_custom_container( container_name = 'MAIN' ).
lo_alv    = NEW cl_gui_alv_grid( i_parent = lo_custom ).
lo_alv->set_table_for_first_display(
  EXPORTING
    it_fieldcatalog = lt_fcat
  CHANGING
    it_outtab       = <fs_table> ).

Real-World Use Cases for Dynamic Structures

1. Generic ALV Report Builder

Create a report that takes any database table name from a selection screen and dynamically generates the structure using metadata, retrieves the data with SELECT, and renders it as an ALV grid — without knowing the table layout at design time. One tool can replace many individual reports.

2. Data Migration Utility

A migration tool that reads source file layouts from a configuration table, dynamically constructs the destination structure, maps fields by name or position, and loads data into SAP — supporting hundreds of different formats from a single codebase.

3. Flexible BAPI Wrapper Framework

A framework that wraps several BAPIs through a single interface, dynamically constructing parameter structures based on which BAPI is being called — enabling runtime-driven orchestration based on configuration instead of hard-coded calls.

4. JSON/XML Serialization Engine

A serializer that examines any ABAP structure using RTTS, extracts field names and types dynamically, and produces a JSON or XML document for REST API integrations, OData services, and middleware layers.

5. Dynamic Form Builder

A SAP UI screen or Fiori application that retrieves field definitions from a database configuration table and creates input screens dynamically — without developer intervention for new forms.

Performance Considerations for Dynamic Structures

Although dynamic structures are extremely powerful, they carry overhead due to runtime type resolution. Keep these performance guidelines in mind:

• Cache type descriptors — avoid creating duplicate CL_ABAP_STRUCTDESCR objects inside loops; save them in static variables or class attributes.
• Reduce ASSIGN COMPONENT calls in tightly coupled loops — consider using MOVE-CORRESPONDING with field symbols where applicable.
• Use stable structures in high-frequency, performance-critical processes.
• Use buffering — when the same structure is needed across multiple programs, serialize and store component tables in a configuration table or memory object.
• Profile using SE30 and ST05 — always measure performance before and after implementing dynamic programming in production situations.

Best Practices for Working with Structures in SAP ABAP

• Follow naming conventions — always prefix custom structures with Z or Y (e.g., ZORDER_STRUC). Use ZZ_ or YY_ for custom fields in append structures.
• Use global structures for reuse — when a structure will be used across multiple programs or function modules, define it in SE11 globally.
• Document your structures — use the Dictionary's short description and field documentation features to save time during audits and maintenance.
• Keep flat structures for DB tables — SAP's database layer does not support deep types. Always flatten deep structures before persistence.
• Use include structures strategically — group logically related fields (e.g., address fields, audit fields) into include structures to support clear, DRY data models.
• Test append structures in development before production — always develop and test in the development system before transporting to QA or production.
• Limit RTTS use to frameworks — dynamic programming reduces readability and testability. Use it at framework level and document it thoroughly.
• Validate the field catalog before displaying ALV — incorrect or missing entries can cause runtime dumps. Always test the display before deployment.
• Use meaningful names for dynamic structure components — even though fields are built at runtime, their names should follow naming conventions for maintainability.
• Handle SY-SUBRC after ASSIGN COMPONENT — never assume a field exists in a dynamic structure. Always check the return code before accessing the field symbol.

Common Errors and How to Fix Them

Error / Symptom	Root Cause	Solution
Type is not yet invented	Structure is not active in SE11	Open SE11 and activate the structure
ASSIGN COMPONENT returns SY-SUBRC <> 0	Field name mismatch (case-sensitive)	Ensure the field name is uppercase
LVC_FIELDCATALOG_MERGE dumps	Structure not listed in Dictionary or inactive	Activate the global structure in SE11
Deep structure in database table error	SAP DB layer does not support deep types	Flatten the structure before DB operations
Performance degradation in loops	RTTS calls repeated inside the loop	Cache type descriptor objects
Append structure fields not visible	Transport not fully imported or not activated	Import the transport and activate in the target system
CREATE DATA TYPE HANDLE not working	Incomplete or invalid component table	Verify all components have proper types assigned
MOVE-CORRESPONDING misses fields	Field names differ between structures	Ensure field names match exactly
Short dump in ALV display	Field catalog contains wrong data type	Verify the inttype entries in the field catalog

Summary Table: Types of Structures in SAP ABAP

Structure Type	Where Defined	Scope	Primary Use Case	Supports Deep Types
Local Structure	ABAP Program	Program-only	Temporary data handling	Yes
Global Structure	SE11 Dictionary	System-wide	Reusable data definitions	Limited
Include Structure	SE11 Dictionary	In parent	Modular field grouping	No
Append Structure	SE11 (on existing object)	Extension of target	Upgrade-safe customization	No
Deep Structure	ABAP Program / SE11	Program/Global	Hierarchical data models	Yes
Dynamic Structure	Runtime (RTTS)	Runtime-generated	Generic/flexible programming	Yes

Conclusion

From the basics to the most cutting-edge runtime methods, this guide covers the entire spectrum of building structures in SAP ABAP. Structures are the foundation of ABAP programming, and the ability to use them efficiently at every level is what separates great SAP developers from average ones.

Here is a quick summary of what you have learned:

• Local structures are your program-scoped data containers — easy to define and great for short-term use.
• Global structures are stored in the ABAP Dictionary and reused throughout the enterprise — the basis of a consistent data model.
• Include structures provide modular, clean design by embedding reused field groups without repetition.
• Append structures are a safe, upgrade-proof way to extend SAP standard objects with custom fields.
• Deep structures provide complex, hierarchical data models required for modern API and integration tasks.
• Dynamic structures built with RTTS unlock the most flexible and powerful programming patterns available in ABAP.
• Field catalogs connect your data structures to ALV display — they can be built automatically or manually for full control.

Whether you are creating your first SAP report or building complex general-purpose frameworks, the skills covered in this guide will serve you throughout your ABAP development career. Practice each technique in the SAP development environment, explore the RTTS classes in Class Builder (SE24), and gradually integrate dynamic programming into your toolkit.

The path from creating a structure in SAP ABAP to mastering fully dynamic runtime structures is what makes a professional ABAP developer — and this guide provides the complete path to get there.