ABAP Select data from SAP table CDS_M_POH_AGGR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CDS_M_POH_AGGR 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 CDS_M_POH_AGGR. 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 CDS_M_POH_AGGR 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_CDS_M_POH_AGGR TYPE STANDARD TABLE OF CDS_M_POH_AGGR,
      WA_CDS_M_POH_AGGR TYPE CDS_M_POH_AGGR,
      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: <CDS_M_POH_AGGR> TYPE CDS_M_POH_AGGR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CDS_M_POH_AGGR
  INTO TABLE IT_CDS_M_POH_AGGR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDS_M_POH_AGGR
*  INTO TABLE @DATA(IT_CDS_M_POH_AGGR2).
*--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_CDS_M_POH_AGGR INDEX 1 INTO DATA(WA_CDS_M_POH_AGGR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CDS_M_POH_AGGR ASSIGNING <CDS_M_POH_AGGR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDS_M_POH_AGGR>-MANDT = 1.
<CDS_M_POH_AGGR>-EBELN = 1.
<CDS_M_POH_AGGR>-EBELP = 1.
<CDS_M_POH_AGGR>-ZEKKN = 1.
<CDS_M_POH_AGGR>-PSTYP = 1.

ENDLOOP.

LOOP AT IT_CDS_M_POH_AGGR INTO WA_CDS_M_POH_AGGR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDS_M_POH_AGGR-ELIKZ, sy-vline,
  WA_CDS_M_POH_AGGR-MATNR, sy-vline,
  WA_CDS_M_POH_AGGR-LIFNR, sy-vline,
  WA_CDS_M_POH_AGGR-EKORG, sy-vline,
  WA_CDS_M_POH_AGGR-EKGRP, sy-vline,
  WA_CDS_M_POH_AGGR-BSTYP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDS_M_POH_AGGR 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_CDS_M_POH_AGGR 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_CDS_M_POH_AGGR INTO WA_CDS_M_POH_AGGR.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDS_M_POH_AGGR-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDS_M_POH_AGGR-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CDS_M_POH_AGGR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDS_M_POH_AGGR-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDS_M_POH_AGGR-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDS_M_POH_AGGR-LIFNR.
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_CDS_M_POH_AGGR_STR, 
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ZEKKN TYPE STRING,
PSTYP TYPE STRING,
ELIKZ TYPE STRING,
MATNR TYPE STRING,
LIFNR TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
BSTYP TYPE STRING,
BSART TYPE STRING,
WERKS TYPE STRING,
FPLNR TYPE STRING,
HSWAE TYPE STRING,
RTYPE TYPE STRING,
BEDAT TYPE STRING,
SUM_REWRB_OD TYPE STRING,
SUM_REWRT TYPE STRING,
SUM_WEWRT TYPE STRING,
SUM_REMNG TYPE STRING,
SUM_WEMNG TYPE STRING,
SUM_AREWR TYPE STRING,
SUM_REMNG_F TYPE STRING,
SUM_WEMNG_F TYPE STRING,
SUM_WESBS TYPE STRING,
SUM_WAMNG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDS_M_POH_AGGR_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_CDS_M_POH_AGGR_STR-MANDT sy-vline 
WA_CDS_M_POH_AGGR_STR-EBELN sy-vline 
WA_CDS_M_POH_AGGR_STR-EBELP sy-vline 
WA_CDS_M_POH_AGGR_STR-ZEKKN sy-vline 
WA_CDS_M_POH_AGGR_STR-PSTYP sy-vline 
WA_CDS_M_POH_AGGR_STR-ELIKZ sy-vline 
WA_CDS_M_POH_AGGR_STR-MATNR sy-vline 
WA_CDS_M_POH_AGGR_STR-LIFNR sy-vline 
WA_CDS_M_POH_AGGR_STR-EKORG sy-vline 
WA_CDS_M_POH_AGGR_STR-EKGRP sy-vline 
WA_CDS_M_POH_AGGR_STR-BSTYP sy-vline 
WA_CDS_M_POH_AGGR_STR-BSART sy-vline 
WA_CDS_M_POH_AGGR_STR-WERKS sy-vline 
WA_CDS_M_POH_AGGR_STR-FPLNR sy-vline 
WA_CDS_M_POH_AGGR_STR-HSWAE sy-vline 
WA_CDS_M_POH_AGGR_STR-RTYPE sy-vline 
WA_CDS_M_POH_AGGR_STR-BEDAT sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_REWRB_OD sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_REWRT sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_WEWRT sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_REMNG sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_WEMNG sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_AREWR sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_REMNG_F sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_WEMNG_F sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_WESBS sy-vline 
WA_CDS_M_POH_AGGR_STR-SUM_WAMNG sy-vline      INTO ld_text SEPARATED BY SPACE.

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