ABAP Select data from SAP table SCMAPER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCMAPER
*  INTO TABLE @DATA(IT_SCMAPER2).
*--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_SCMAPER INDEX 1 INTO DATA(WA_SCMAPER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCMAPER>-ENDCOUNT = 1.
<SCMAPER>-ENDDATE = 1.
<SCMAPER>-DAY1 = 1.
<SCMAPER>-DAY2 = 1.
<SCMAPER>-WEEK1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCMAPER-CHK_MON, sy-vline,
  WA_SCMAPER-CHK_DIE, sy-vline,
  WA_SCMAPER-CHK_MIT, sy-vline,
  WA_SCMAPER-CHK_DON, sy-vline,
  WA_SCMAPER-CHK_FRE, sy-vline,
  WA_SCMAPER-CHK_SAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCMAPER 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_SCMAPER 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_SCMAPER INTO WA_SCMAPER.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_SCMAPER_STR, 
ENDCOUNT TYPE STRING,
ENDDATE TYPE STRING,
DAY1 TYPE STRING,
DAY2 TYPE STRING,
WEEK1 TYPE STRING,
CHK_MON TYPE STRING,
CHK_DIE TYPE STRING,
CHK_MIT TYPE STRING,
CHK_DON TYPE STRING,
CHK_FRE TYPE STRING,
CHK_SAM TYPE STRING,
CHK_SON TYPE STRING,
MONTH1 TYPE STRING,
MONTH2 TYPE STRING,
MONTH3 TYPE STRING,
MONTH4 TYPE STRING,
MONTH5 TYPE STRING,
YEAR1 TYPE STRING,
YEAR2 TYPE STRING,
YEAR3 TYPE STRING,
YEAR4 TYPE STRING,
YEAR5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCMAPER_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_SCMAPER_STR-ENDCOUNT sy-vline 
WA_SCMAPER_STR-ENDDATE sy-vline 
WA_SCMAPER_STR-DAY1 sy-vline 
WA_SCMAPER_STR-DAY2 sy-vline 
WA_SCMAPER_STR-WEEK1 sy-vline 
WA_SCMAPER_STR-CHK_MON sy-vline 
WA_SCMAPER_STR-CHK_DIE sy-vline 
WA_SCMAPER_STR-CHK_MIT sy-vline 
WA_SCMAPER_STR-CHK_DON sy-vline 
WA_SCMAPER_STR-CHK_FRE sy-vline 
WA_SCMAPER_STR-CHK_SAM sy-vline 
WA_SCMAPER_STR-CHK_SON sy-vline 
WA_SCMAPER_STR-MONTH1 sy-vline 
WA_SCMAPER_STR-MONTH2 sy-vline 
WA_SCMAPER_STR-MONTH3 sy-vline 
WA_SCMAPER_STR-MONTH4 sy-vline 
WA_SCMAPER_STR-MONTH5 sy-vline 
WA_SCMAPER_STR-YEAR1 sy-vline 
WA_SCMAPER_STR-YEAR2 sy-vline 
WA_SCMAPER_STR-YEAR3 sy-vline 
WA_SCMAPER_STR-YEAR4 sy-vline 
WA_SCMAPER_STR-YEAR5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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