ABAP Select data from SAP table CMMDA into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CMMDA 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 CMMDA. 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 CMMDA 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_CMMDA TYPE STANDARD TABLE OF CMMDA,
      WA_CMMDA TYPE CMMDA,
      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: <CMMDA> TYPE CMMDA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMMDA
*  INTO TABLE @DATA(IT_CMMDA2).
*--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_CMMDA INDEX 1 INTO DATA(WA_CMMDA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMMDA>-EBELN = 1.
<CMMDA>-EBELP = 1.
<CMMDA>-WERKS = 1.
<CMMDA>-LGORT = 1.
<CMMDA>-PSTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMMDA-ADRNR, sy-vline,
  WA_CMMDA-ADRN2, sy-vline,
  WA_CMMDA-KUNNR, sy-vline,
  WA_CMMDA-EMLIF, sy-vline,
  WA_CMMDA-LBLKZ, sy-vline,
  WA_CMMDA-ADDRNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMMDA 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_CMMDA 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_CMMDA INTO WA_CMMDA.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMMDA-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMDA-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMMDA-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMDA-ADRNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMMDA-ADRN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMDA-ADRN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMMDA-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMDA-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EMLIF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMMDA-EMLIF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMDA-EMLIF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADDRNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMMDA-ADDRNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMMDA-ADDRNUMBER.
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_CMMDA_STR, 
EBELN TYPE STRING,
EBELP TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
PSTYP TYPE STRING,
ADRNR TYPE STRING,
ADRN2 TYPE STRING,
KUNNR TYPE STRING,
EMLIF TYPE STRING,
LBLKZ TYPE STRING,
ADDRNUMBER TYPE STRING,
ADDR_HANDLE TYPE STRING,
AFNAM TYPE STRING,
DELIVERYADDRTYPE TYPE STRING,
CHANGED_DA TYPE STRING,
DELIVERY_DATE TYPE STRING,
EINDT TYPE STRING,
LFDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMMDA_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_CMMDA_STR-EBELN sy-vline 
WA_CMMDA_STR-EBELP sy-vline 
WA_CMMDA_STR-WERKS sy-vline 
WA_CMMDA_STR-LGORT sy-vline 
WA_CMMDA_STR-PSTYP sy-vline 
WA_CMMDA_STR-ADRNR sy-vline 
WA_CMMDA_STR-ADRN2 sy-vline 
WA_CMMDA_STR-KUNNR sy-vline 
WA_CMMDA_STR-EMLIF sy-vline 
WA_CMMDA_STR-LBLKZ sy-vline 
WA_CMMDA_STR-ADDRNUMBER sy-vline 
WA_CMMDA_STR-ADDR_HANDLE sy-vline 
WA_CMMDA_STR-AFNAM sy-vline 
WA_CMMDA_STR-DELIVERYADDRTYPE sy-vline 
WA_CMMDA_STR-CHANGED_DA sy-vline 
WA_CMMDA_STR-DELIVERY_DATE sy-vline 
WA_CMMDA_STR-EINDT sy-vline 
WA_CMMDA_STR-LFDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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