ABAP Select data from SAP table CMAP_MVMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMAP_MVMP
*  INTO TABLE @DATA(IT_CMAP_MVMP2).
*--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_CMAP_MVMP INDEX 1 INTO DATA(WA_CMAP_MVMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMAP_MVMP>-MANDT = 1.
<CMAP_MVMP>-CTXT = 1.
<CMAP_MVMP>-ATMP = 1.
<CMAP_MVMP>-SEQNC = 1.
<CMAP_MVMP>-PRRTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMAP_MVMP-ATTGT, sy-vline,
  WA_CMAP_MVMP-ATSRC, sy-vline,
  WA_CMAP_MVMP-VLSRC, sy-vline,
  WA_CMAP_MVMP-RGEXP, sy-vline,
  WA_CMAP_MVMP-VLTGT, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_CMAP_MVMP 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_CMAP_MVMP 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_CMAP_MVMP INTO WA_CMAP_MVMP.


*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_CMAP_MVMP_STR, 
MANDT TYPE STRING,
CTXT TYPE STRING,
ATMP TYPE STRING,
SEQNC TYPE STRING,
PRRTY TYPE STRING,
ATTGT TYPE STRING,
ATSRC TYPE STRING,
VLSRC TYPE STRING,
RGEXP TYPE STRING,
VLTGT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMAP_MVMP_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_CMAP_MVMP_STR-MANDT sy-vline 
WA_CMAP_MVMP_STR-CTXT sy-vline 
WA_CMAP_MVMP_STR-ATMP sy-vline 
WA_CMAP_MVMP_STR-SEQNC sy-vline 
WA_CMAP_MVMP_STR-PRRTY sy-vline 
WA_CMAP_MVMP_STR-ATTGT sy-vline 
WA_CMAP_MVMP_STR-ATSRC sy-vline 
WA_CMAP_MVMP_STR-VLSRC sy-vline 
WA_CMAP_MVMP_STR-RGEXP sy-vline 
WA_CMAP_MVMP_STR-VLTGT sy-vline      INTO ld_text SEPARATED BY SPACE.

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