ABAP Select data from SAP table PMPECOMPASMAGGNI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMPECOMPASMAGGNI
*  INTO TABLE @DATA(IT_PMPECOMPASMAGGNI2).
*--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_PMPECOMPASMAGGNI INDEX 1 INTO DATA(WA_PMPECOMPASMAGGNI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMPECOMPASMAGGNI>-MANDT = 1.
<PMPECOMPASMAGGNI>-RESERVATION = 1.
<PMPECOMPASMAGGNI>-RESERVATIONITEM = 1.
<PMPECOMPASMAGGNI>-RECORDTYPE = 1.
<PMPECOMPASMAGGNI>-OPACTYNTWKINSTANCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMPECOMPASMAGGNI-OPACTYNTWKELEMENT, sy-vline,
  WA_PMPECOMPASMAGGNI-ASSEMBLYSHOPFLOORITEM, sy-vline,
  WA_PMPECOMPASMAGGNI-SHOPFLOORITEM, sy-vline,
  WA_PMPECOMPASMAGGNI-BATCH, sy-vline,
  WA_PMPECOMPASMAGGNI-MATERIAL, sy-vline,
  WA_PMPECOMPASMAGGNI-PLANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMPECOMPASMAGGNI 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_PMPECOMPASMAGGNI 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_PMPECOMPASMAGGNI INTO WA_PMPECOMPASMAGGNI.


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

*Conversion exit CUNIT, internal->external for field MATERIALBASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PMPECOMPASMAGGNI-MATERIALBASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMPECOMPASMAGGNI-MATERIALBASEUNIT.
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_PMPECOMPASMAGGNI_STR, 
MANDT TYPE STRING,
RESERVATION TYPE STRING,
RESERVATIONITEM TYPE STRING,
RECORDTYPE TYPE STRING,
OPACTYNTWKINSTANCE TYPE STRING,
OPACTYNTWKELEMENT TYPE STRING,
ASSEMBLYSHOPFLOORITEM TYPE STRING,
SHOPFLOORITEM TYPE STRING,
BATCH TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
DEBITCREDITCODE TYPE STRING,
MATERIALCOMPONENTQUANTITY TYPE STRING,
REQUIREDQUANTITY TYPE STRING,
MATERIALBASEUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMPECOMPASMAGGNI_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_PMPECOMPASMAGGNI_STR-MANDT sy-vline 
WA_PMPECOMPASMAGGNI_STR-RESERVATION sy-vline 
WA_PMPECOMPASMAGGNI_STR-RESERVATIONITEM sy-vline 
WA_PMPECOMPASMAGGNI_STR-RECORDTYPE sy-vline 
WA_PMPECOMPASMAGGNI_STR-OPACTYNTWKINSTANCE sy-vline 
WA_PMPECOMPASMAGGNI_STR-OPACTYNTWKELEMENT sy-vline 
WA_PMPECOMPASMAGGNI_STR-ASSEMBLYSHOPFLOORITEM sy-vline 
WA_PMPECOMPASMAGGNI_STR-SHOPFLOORITEM sy-vline 
WA_PMPECOMPASMAGGNI_STR-BATCH sy-vline 
WA_PMPECOMPASMAGGNI_STR-MATERIAL sy-vline 
WA_PMPECOMPASMAGGNI_STR-PLANT sy-vline 
WA_PMPECOMPASMAGGNI_STR-DEBITCREDITCODE sy-vline 
WA_PMPECOMPASMAGGNI_STR-MATERIALCOMPONENTQUANTITY sy-vline 
WA_PMPECOMPASMAGGNI_STR-REQUIREDQUANTITY sy-vline 
WA_PMPECOMPASMAGGNI_STR-MATERIALBASEUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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