ABAP Select data from SAP table PSLOWNOMOMATTIDX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSLOWNOMOMATTIDX
*  INTO TABLE @DATA(IT_PSLOWNOMOMATTIDX2).
*--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_PSLOWNOMOMATTIDX INDEX 1 INTO DATA(WA_PSLOWNOMOMATTIDX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSLOWNOMOMATTIDX>-MANDT = 1.
<PSLOWNOMOMATTIDX>-YEARPERIOD = 1.
<PSLOWNOMOMATTIDX>-MATERIAL = 1.
<PSLOWNOMOMATTIDX>-PLANT = 1.
<PSLOWNOMOMATTIDX>-MATERIALBASEUNIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSLOWNOMOMATTIDX-STARTDATE, sy-vline,
  WA_PSLOWNOMOMATTIDX-ENDDATE, sy-vline,
  WA_PSLOWNOMOMATTIDX-MATLWRHSSTKQTYINMATLBASEUNIT, sy-vline,
  WA_PSLOWNOMOMATTIDX-CONSUMPTIONQUANTITY, sy-vline,
  WA_PSLOWNOMOMATTIDX-CONSUMPTIONTOSTOCKRATIO, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PSLOWNOMOMATTIDX 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_PSLOWNOMOMATTIDX 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_PSLOWNOMOMATTIDX INTO WA_PSLOWNOMOMATTIDX.


*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_PSLOWNOMOMATTIDX-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSLOWNOMOMATTIDX-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MATERIALBASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSLOWNOMOMATTIDX-MATERIALBASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSLOWNOMOMATTIDX-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_PSLOWNOMOMATTIDX_STR, 
MANDT TYPE STRING,
YEARPERIOD TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
MATERIALBASEUNIT TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
MATLWRHSSTKQTYINMATLBASEUNIT TYPE STRING,
CONSUMPTIONQUANTITY TYPE STRING,
CONSUMPTIONTOSTOCKRATIO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSLOWNOMOMATTIDX_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_PSLOWNOMOMATTIDX_STR-MANDT sy-vline 
WA_PSLOWNOMOMATTIDX_STR-YEARPERIOD sy-vline 
WA_PSLOWNOMOMATTIDX_STR-MATERIAL sy-vline 
WA_PSLOWNOMOMATTIDX_STR-PLANT sy-vline 
WA_PSLOWNOMOMATTIDX_STR-MATERIALBASEUNIT sy-vline 
WA_PSLOWNOMOMATTIDX_STR-STARTDATE sy-vline 
WA_PSLOWNOMOMATTIDX_STR-ENDDATE sy-vline 
WA_PSLOWNOMOMATTIDX_STR-MATLWRHSSTKQTYINMATLBASEUNIT sy-vline 
WA_PSLOWNOMOMATTIDX_STR-CONSUMPTIONQUANTITY sy-vline 
WA_PSLOWNOMOMATTIDX_STR-CONSUMPTIONTOSTOCKRATIO sy-vline      INTO ld_text SEPARATED BY SPACE.

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