ABAP Select data from SAP table REMC_MASSCHANGE_GENERAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REMC_MASSCHANGE_GENERAL
*  INTO TABLE @DATA(IT_REMC_MASSCHANGE_GENERAL2).
*--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_REMC_MASSCHANGE_GENERAL INDEX 1 INTO DATA(WA_REMC_MASSCHANGE_GENERAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REMC_MASSCHANGE_GENERAL>-MASSCHANGEINTRENO = 1.
<REMC_MASSCHANGE_GENERAL>-MASSCHANGEOBJNR = 1.
<REMC_MASSCHANGE_GENERAL>-MASSCHANGEOBJECT = 1.
<REMC_MASSCHANGE_GENERAL>-MASSCHANGEIDENT = 1.
<REMC_MASSCHANGE_GENERAL>-MASSCHANGEDESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REMC_MASSCHANGE_GENERAL-MASSCHANGESTATUS, sy-vline,
  WA_REMC_MASSCHANGE_GENERAL-MASSCHANGEPERFORM, sy-vline,
  WA_REMC_MASSCHANGE_GENERAL-MASSCHANGEDELETE, sy-vline,
  WA_REMC_MASSCHANGE_GENERAL-MASSCHANGETERMNO, sy-vline,
  WA_REMC_MASSCHANGE_GENERAL-MASSCHANGEXTERMNO, sy-vline,
  WA_REMC_MASSCHANGE_GENERAL-MASSCHANGEFOLLOWEXIST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REMC_MASSCHANGE_GENERAL 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_REMC_MASSCHANGE_GENERAL 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_REMC_MASSCHANGE_GENERAL INTO WA_REMC_MASSCHANGE_GENERAL.


*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 MASSCHANGETERMNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REMC_MASSCHANGE_GENERAL-MASSCHANGETERMNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REMC_MASSCHANGE_GENERAL-MASSCHANGETERMNO.
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_REMC_MASSCHANGE_GENERAL_STR, 
MASSCHANGEINTRENO TYPE STRING,
MASSCHANGEOBJNR TYPE STRING,
MASSCHANGEOBJECT TYPE STRING,
MASSCHANGEIDENT TYPE STRING,
MASSCHANGEDESCRIPTION TYPE STRING,
MASSCHANGESTATUS TYPE STRING,
MASSCHANGEPERFORM TYPE STRING,
MASSCHANGEDELETE TYPE STRING,
MASSCHANGETERMNO TYPE STRING,
MASSCHANGEXTERMNO TYPE STRING,
MASSCHANGEFOLLOWEXIST TYPE STRING,
MASSCHANGEFOLLOWDELETE TYPE STRING,
MASSCHANGEFOLLOWCHANGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REMC_MASSCHANGE_GENERAL_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_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEINTRENO sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEOBJNR sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEOBJECT sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEIDENT sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEDESCRIPTION sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGESTATUS sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEPERFORM sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEDELETE sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGETERMNO sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEXTERMNO sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEFOLLOWEXIST sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEFOLLOWDELETE sy-vline 
WA_REMC_MASSCHANGE_GENERAL_STR-MASSCHANGEFOLLOWCHANGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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