ABAP Select data from SAP table /PM0/ABN_ACCDOCHEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PM0/ABN_ACCDOCHEADER table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to /PM0/ABN_ACCDOCHEADER. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the /PM0/ABN_ACCDOCHEADER table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_/PM0/ABN_ACCDOCHEADER TYPE STANDARD TABLE OF /PM0/ABN_ACCDOCHEADER,
      WA_/PM0/ABN_ACCDOCHEADER TYPE /PM0/ABN_ACCDOCHEADER,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: </PM0/ABN_ACCDOCHEADER> TYPE /PM0/ABN_ACCDOCHEADER.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/PM0/ABN_ACCDOCHEADER.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PM0/ABN_ACCDOCHEADER
  INTO TABLE IT_/PM0/ABN_ACCDOCHEADER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PM0/ABN_ACCDOCHEADER
*  INTO TABLE @DATA(IT_/PM0/ABN_ACCDOCHEADER2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_/PM0/ABN_ACCDOCHEADER INDEX 1 INTO DATA(WA_/PM0/ABN_ACCDOCHEADER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PM0/ABN_ACCDOCHEADER ASSIGNING </PM0/ABN_ACCDOCHEADER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PM0/ABN_ACCDOCHEADER>-DOCUMENTNR_ID = 1.
</PM0/ABN_ACCDOCHEADER>-DUEDATE_DT = 1.
</PM0/ABN_ACCDOCHEADER>-BNFNUMBER_VL = 1.
</PM0/ABN_ACCDOCHEADER>-POSTINGSTATE_CD = 1.
</PM0/ABN_ACCDOCHEADER>-BO_CD = 1.

ENDLOOP.

LOOP AT IT_/PM0/ABN_ACCDOCHEADER INTO WA_/PM0/ABN_ACCDOCHEADER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PM0/ABN_ACCDOCHEADER-ORIGIN_ID, sy-vline,
  WA_/PM0/ABN_ACCDOCHEADER-POLICY_ID, sy-vline,
  WA_/PM0/ABN_ACCDOCHEADER-POLICYNR_TT, sy-vline,
  WA_/PM0/ABN_ACCDOCHEADER-POLICYPRODUCT_ID, sy-vline,
  WA_/PM0/ABN_ACCDOCHEADER-APPLNR_TT, sy-vline,
  WA_/PM0/ABN_ACCDOCHEADER-JOURNALNO_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PM0/ABN_ACCDOCHEADER you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_/PM0/ABN_ACCDOCHEADER TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_/PM0/ABN_ACCDOCHEADER INTO WA_/PM0/ABN_ACCDOCHEADER.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field DOCUMENTNR_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PM0/ABN_ACCDOCHEADER-DOCUMENTNR_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PM0/ABN_ACCDOCHEADER-DOCUMENTNR_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field BNFNUMBER_VL
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_/PM0/ABN_ACCDOCHEADER-BNFNUMBER_VL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PM0/ABN_ACCDOCHEADER-BNFNUMBER_VL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field POLICYNR_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PM0/ABN_ACCDOCHEADER-POLICYNR_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PM0/ABN_ACCDOCHEADER-POLICYNR_TT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field APPLNR_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PM0/ABN_ACCDOCHEADER-APPLNR_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PM0/ABN_ACCDOCHEADER-APPLNR_TT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field APPLNR_CD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PM0/ABN_ACCDOCHEADER-APPLNR_CD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PM0/ABN_ACCDOCHEADER-APPLNR_CD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AMNNR_TT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PM0/ABN_ACCDOCHEADER-AMNNR_TT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PM0/ABN_ACCDOCHEADER-AMNNR_TT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REVERSALDOC_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PM0/ABN_ACCDOCHEADER-REVERSALDOC_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PM0/ABN_ACCDOCHEADER-REVERSALDOC_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field RATE_VL
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_/PM0/ABN_ACCDOCHEADER-RATE_VL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PM0/ABN_ACCDOCHEADER-RATE_VL.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/PM0/ABN_ACCDOCHEADER_STR, 
DOCUMENTNR_ID TYPE STRING,
DUEDATE_DT TYPE STRING,
BNFNUMBER_VL TYPE STRING,
POSTINGSTATE_CD TYPE STRING,
BO_CD TYPE STRING,
ORIGIN_ID TYPE STRING,
POLICY_ID TYPE STRING,
POLICYNR_TT TYPE STRING,
POLICYPRODUCT_ID TYPE STRING,
APPLNR_TT TYPE STRING,
JOURNALNO_ID TYPE STRING,
APPLNR_CD TYPE STRING,
AMNNR_TT TYPE STRING,
POSTING_DT TYPE STRING,
ACCOUNTFROM_DT TYPE STRING,
ACCOUNTTO_DT TYPE STRING,
DOCUMENT_DT TYPE STRING,
COMPCODE_CD TYPE STRING,
CURRENCY_ID TYPE STRING,
EXCHANGERATE_TP TYPE STRING,
REVERSALDOC_ID TYPE STRING,
BOPOLICY_ID TYPE STRING,
POLPRPM_ID TYPE STRING,
SALEPRD_ID TYPE STRING,
DOCUMENTCAT_ID TYPE STRING,
RATE_VL TYPE STRING,
RATE_DT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PM0/ABN_ACCDOCHEADER_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_/PM0/ABN_ACCDOCHEADER_STR-DOCUMENTNR_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-DUEDATE_DT sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-BNFNUMBER_VL sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-POSTINGSTATE_CD sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-BO_CD sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-ORIGIN_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-POLICY_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-POLICYNR_TT sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-POLICYPRODUCT_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-APPLNR_TT sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-JOURNALNO_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-APPLNR_CD sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-AMNNR_TT sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-POSTING_DT sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-ACCOUNTFROM_DT sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-ACCOUNTTO_DT sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-DOCUMENT_DT sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-COMPCODE_CD sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-CURRENCY_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-EXCHANGERATE_TP sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-REVERSALDOC_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-BOPOLICY_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-POLPRPM_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-SALEPRD_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-DOCUMENTCAT_ID sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-RATE_VL sy-vline 
WA_/PM0/ABN_ACCDOCHEADER_STR-RATE_DT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.