ABAP Select data from SAP table MAWM_FUNC_INTERFACE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MAWM_FUNC_INTERFACE
*  INTO TABLE @DATA(IT_MAWM_FUNC_INTERFACE2).
*--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_MAWM_FUNC_INTERFACE INDEX 1 INTO DATA(WA_MAWM_FUNC_INTERFACE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MAWM_FUNC_INTERFACE>-LGNUM = 1.
<MAWM_FUNC_INTERFACE>-LGTYP = 1.
<MAWM_FUNC_INTERFACE>-SPRAS = 1.
<MAWM_FUNC_INTERFACE>-LAISO = 1.
<MAWM_FUNC_INTERFACE>-BNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MAWM_FUNC_INTERFACE-TCODE, sy-vline,
  WA_MAWM_FUNC_INTERFACE-SDATE, sy-vline,
  WA_MAWM_FUNC_INTERFACE-STIME, sy-vline,
  WA_MAWM_FUNC_INTERFACE-VARIA, sy-vline,
  WA_MAWM_FUNC_INTERFACE-XFLAG, sy-vline,
  WA_MAWM_FUNC_INTERFACE-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MAWM_FUNC_INTERFACE 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_MAWM_FUNC_INTERFACE 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_MAWM_FUNC_INTERFACE INTO WA_MAWM_FUNC_INTERFACE.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MAWM_FUNC_INTERFACE-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAWM_FUNC_INTERFACE-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RCVPRN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MAWM_FUNC_INTERFACE-RCVPRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MAWM_FUNC_INTERFACE-RCVPRN.
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_MAWM_FUNC_INTERFACE_STR, 
LGNUM TYPE STRING,
LGTYP TYPE STRING,
SPRAS TYPE STRING,
LAISO TYPE STRING,
BNAME TYPE STRING,
TCODE TYPE STRING,
SDATE TYPE STRING,
STIME TYPE STRING,
VARIA TYPE STRING,
XFLAG TYPE STRING,
WAERS TYPE STRING,
BWLVS TYPE STRING,
LNUMT TYPE STRING,
LTYPT TYPE STRING,
REPID TYPE STRING,
RCVPRN TYPE STRING,
IACID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MAWM_FUNC_INTERFACE_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_MAWM_FUNC_INTERFACE_STR-LGNUM sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-LGTYP sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-SPRAS sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-LAISO sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-BNAME sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-TCODE sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-SDATE sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-STIME sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-VARIA sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-XFLAG sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-WAERS sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-BWLVS sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-LNUMT sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-LTYPT sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-REPID sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-RCVPRN sy-vline 
WA_MAWM_FUNC_INTERFACE_STR-IACID sy-vline      INTO ld_text SEPARATED BY SPACE.

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