Today’s session is one of the most important practical topics in ABAP development.

You will understand:

• Internal Table Operations (READ, APPEND, INSERT, DELETE, MODIFY, SORT)

• Memory Handling (CLEAR, FREE)

• CALL TRANSACTION

• HOTSPOT & Interactive Output

• SAP Memory vs ABAP Memory

• EXPORT / IMPORT

• SUBMIT

• Parameter ID Handling

This is core report programming knowledge used in real SAP projects.

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🧠 PART 1 – Internal Table Operations

Before databases, before UI — ABAP developers work heavily with internal tables.

Think of an internal table as:

A temporary Excel sheet stored in program memory.

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🔹 1. TYPE & DATA Declaration

TYPES: BEGIN OF ty_student,
         id     TYPE i,
         name   TYPE string,
         marks  TYPE i,
       END OF ty_student.

DATA: gt_student TYPE STANDARD TABLE OF ty_student,
      gs_student TYPE ty_student.

What happens here?

• ty_student → Structure (like one row)

• gt_student → Internal table (multiple rows)

• gs_student → Work area (one row at a time)

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🔹 2. APPEND – Add Record at End

gs_student-id = 1.
gs_student-name = 'HARISH'.
gs_student-marks = 85.
APPEND gs_student TO gt_student.

📌 Meaning:

Adds a new row at the end of internal table.

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🔹 3. INSERT – Insert at Specific Position

INSERT gs_student INTO gt_student INDEX 2.

📌 Inserts record at position 2.

If index does not exist → Runtime error.

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🔹 4. READ TABLE – Fetch Specific Record

READ TABLE gt_student INTO gs_student WITH KEY id = 2.
IF sy-subrc = 0.
  WRITE: / 'Read Success:', gs_student-name.
ENDIF.

Important:

sy-subrc = 0 → Success
sy-subrc ≠ 0 → Record not found

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🔹 5. MODIFY – Update Existing Row

gs_student-marks = 95.
MODIFY gt_student FROM gs_student INDEX sy-tabix.

Updates existing record at given index.

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🔹 6. DELETE – Remove Record

DELETE gt_student WHERE id = 3.

Deletes record matching condition.

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🔹 7. SORT – Arrange Records

SORT gt_student BY marks DESCENDING.

Sorts table by marks from highest to lowest.

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🔹 8. LOOP & SUM – Process Table

DATA gv_total TYPE i.

LOOP AT gt_student INTO gs_student.
  gv_total = gv_total + gs_student-marks.
ENDLOOP.

WRITE: / 'Total Marks:', gv_total.

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🖱 PART 2 – HOTSPOT & CALL TRANSACTION

🔹 HOTSPOT – Clickable Text

FORMAT HOTSPOT ON.
WRITE: / 'Click Here to Open SE11'.
FORMAT HOTSPOT OFF.

When user clicks → You can trigger AT LINE-SELECTION.

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🔹 CALL TRANSACTION

CALL TRANSACTION 'SE11'.

Opens transaction programmatically.

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🔐 PART 3 – SAP Memory vs ABAP Memory

Here is the conceptual difference:

🔷 SAP Memory (SPA/GPA)

Used for:

Passing small values across transactions.

Example:

SET PARAMETER ID 'DTB' FIELD 'SFLIGHT'.
CALL TRANSACTION 'SE11'.

• 'DTB' = Parameter ID for table name

• Opens SE11 with SFLIGHT automatically filled

Lifetime:

Until user logs off.

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🔷 ABAP Memory

Used within same internal session.

EXPORT Example:

EXPORT gv_total TO MEMORY ID 'ZTOTAL'.

IMPORT Example:

IMPORT gv_total FROM MEMORY ID 'ZTOTAL'.

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💡 Real Life Analogy

• SAP Memory → Locker assigned to you in office.

• ABAP Memory → Notebook used inside meeting room.

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🔁 PART 4 – SUBMIT

Used to call another report program.

SUBMIT z_other_program AND RETURN.

If you want to pass values:

SUBMIT z_other_program
  WITH p_carr = 'LH'
  AND RETURN.

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🧹 PART 5 – CLEAR vs FREE

🔹 CLEAR

Resets value but memory remains allocated.

CLEAR gs_student.

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🔹 FREE

Releases memory completely.

FREE gt_student.

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🔄 PART 6 – Full Combined Working Example

REPORT z_day13_demo.

TYPES: BEGIN OF ty_data,
         id TYPE i,
         name TYPE string,
       END OF ty_data.

DATA: gt_data TYPE STANDARD TABLE OF ty_data,
      gs_data TYPE ty_data.

DATA gv_count TYPE i.

* Append
gs_data-id = 1.
gs_data-name = 'ABAP'.
APPEND gs_data TO gt_data.

* Read
READ TABLE gt_data INTO gs_data INDEX 1.
IF sy-subrc = 0.
  WRITE: / 'Record Found:', gs_data-name.
ENDIF.

* Export to memory
EXPORT gv_count TO MEMORY ID 'ZCNT'.

* Call Transaction
SET PARAMETER ID 'DTB' FIELD 'SFLIGHT'.
CALL TRANSACTION 'SE11'.

* Free memory
FREE gt_data.

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📊 Complete Keyword Summary

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🎯 Final Understanding

Today you learned:

• How internal tables behave like temporary databases

• How to manipulate records dynamically

• How SAP Memory differs from ABAP Memory

• How to open transactions programmatically

• How to pass data between programs

• How to properly manage memory