ABAP Select data from SAP table /MDGMM/_S_MM_ES_MARASTOR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /MDGMM/_S_MM_ES_MARASTOR 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 /MDGMM/_S_MM_ES_MARASTOR. 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 /MDGMM/_S_MM_ES_MARASTOR 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_/MDGMM/_S_MM_ES_MARASTOR TYPE STANDARD TABLE OF /MDGMM/_S_MM_ES_MARASTOR,
      WA_/MDGMM/_S_MM_ES_MARASTOR TYPE /MDGMM/_S_MM_ES_MARASTOR,
      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: </MDGMM/_S_MM_ES_MARASTOR> TYPE /MDGMM/_S_MM_ES_MARASTOR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /MDGMM/_S_MM_ES_MARASTOR
  INTO TABLE IT_/MDGMM/_S_MM_ES_MARASTOR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MDGMM/_S_MM_ES_MARASTOR
*  INTO TABLE @DATA(IT_/MDGMM/_S_MM_ES_MARASTOR2).
*--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_/MDGMM/_S_MM_ES_MARASTOR INDEX 1 INTO DATA(WA_/MDGMM/_S_MM_ES_MARASTOR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/MDGMM/_S_MM_ES_MARASTOR ASSIGNING </MDGMM/_S_MM_ES_MARASTOR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MDGMM/_S_MM_ES_MARASTOR>-USMD_ACTIVE = 1.
</MDGMM/_S_MM_ES_MARASTOR>-SEARCH_RANK = 1.
</MDGMM/_S_MM_ES_MARASTOR>-MATERIAL = 1.
</MDGMM/_S_MM_ES_MARASTOR>-BEHVO = 1.
</MDGMM/_S_MM_ES_MARASTOR>-ETIAR = 1.

ENDLOOP.

LOOP AT IT_/MDGMM/_S_MM_ES_MARASTOR INTO WA_/MDGMM/_S_MM_ES_MARASTOR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MDGMM/_S_MM_ES_MARASTOR-ETIFO, sy-vline,
  WA_/MDGMM/_S_MM_ES_MARASTOR-IPRKZ, sy-vline,
  WA_/MDGMM/_S_MM_ES_MARASTOR-MHDHB, sy-vline,
  WA_/MDGMM/_S_MM_ES_MARASTOR-MHDLP, sy-vline,
  WA_/MDGMM/_S_MM_ES_MARASTOR-MHDRZ, sy-vline,
  WA_/MDGMM/_S_MM_ES_MARASTOR-RAUBE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MDGMM/_S_MM_ES_MARASTOR 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_/MDGMM/_S_MM_ES_MARASTOR 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_/MDGMM/_S_MM_ES_MARASTOR INTO WA_/MDGMM/_S_MM_ES_MARASTOR.


*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_/MDGMM/_S_MM_ES_MARASTOR-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MDGMM/_S_MM_ES_MARASTOR-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERKZ, internal->external for field IPRKZ
CALL FUNCTION 'CONVERSION_EXIT_PERKZ_OUTPUT'
  EXPORTING
    input =                      WA_/MDGMM/_S_MM_ES_MARASTOR-IPRKZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MDGMM/_S_MM_ES_MARASTOR-IPRKZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRG, internal->external for field SCMM_MDUR
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_/MDGMM/_S_MM_ES_MARASTOR-SCMM_MDUR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MDGMM/_S_MM_ES_MARASTOR-SCMM_MDUR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRG, internal->external for field SCMM_SLRM
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_/MDGMM/_S_MM_ES_MARASTOR-SCMM_SLRM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MDGMM/_S_MM_ES_MARASTOR-SCMM_SLRM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN3, internal->external for field STOMARAST
CALL FUNCTION 'CONVERSION_EXIT_MATN3_OUTPUT'
  EXPORTING
    input =                      WA_/MDGMM/_S_MM_ES_MARASTOR-STOMARAST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MDGMM/_S_MM_ES_MARASTOR-STOMARAST.
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_/MDGMM/_S_MM_ES_MARASTOR_STR, 
USMD_ACTIVE TYPE STRING,
SEARCH_RANK TYPE STRING,
MATERIAL TYPE STRING,
BEHVO TYPE STRING,
ETIAR TYPE STRING,
ETIFO TYPE STRING,
IPRKZ TYPE STRING,
MHDHB TYPE STRING,
MHDLP TYPE STRING,
MHDRZ TYPE STRING,
RAUBE TYPE STRING,
RDMHD TYPE STRING,
SCMM_MDUR TYPE STRING,
SCMM_SLRM TYPE STRING,
STOMARAST TYPE STRING,
TEMPB TYPE STRING,
WESCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MDGMM/_S_MM_ES_MARASTOR_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_/MDGMM/_S_MM_ES_MARASTOR_STR-USMD_ACTIVE sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-SEARCH_RANK sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-MATERIAL sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-BEHVO sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-ETIAR sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-ETIFO sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-IPRKZ sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-MHDHB sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-MHDLP sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-MHDRZ sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-RAUBE sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-RDMHD sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-SCMM_MDUR sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-SCMM_SLRM sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-STOMARAST sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-TEMPB sy-vline 
WA_/MDGMM/_S_MM_ES_MARASTOR_STR-WESCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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