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How the entries are made in CDHDR and CDPOS tables?

Hi,

I have a dbtable ZTEST_DB which has one field (TESTFIELD). Its data element consists of change document enabled and I created a change document namely ZMYCHDOC in SCDO transaction and included this table and generated the function module ZMYCHDOC_WRITE_DOCUMENT .

I have written one report for adding record to dbtable.

REPORT ztest_report.

*TABLES: ztest_db.

DATA: itab TYPE TABLE OF ztest_db,

wa TYPE ztest_db.

PARAMETERS: test TYPE ztest_db-testfield.

wa-testfield = test.

INSERT into ztest_db values wa.

IF sy-subrc EQ 0.

WRITE: 'success'.

ELSE.

WRITE: 'failed'.

ENDIF.

PERFORM CD_CALL_ZMYCHDOC.

INCLUDE: fzmychdoccdt.

INCLUDE: fzmychdoccdc.

After adding the record I could not find any new entries in CDHDR and CDPOS tables. I dint understand the concept. How the entries are made in those tables when database changes occur?

I have searched many threads. But could not find how the entries are made in those tables. Should I need to use that function module in my code to write the entries?

Regards,

SAP Lover.

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