ABAP Select data from SAP table CAPP_MTK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CAPP_MTK
*  INTO TABLE @DATA(IT_CAPP_MTK2).
*--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_CAPP_MTK INDEX 1 INTO DATA(WA_CAPP_MTK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CAPP_MTK>-MANDT = 1.
<CAPP_MTK>-MATNR = 1.
<CAPP_MTK>-WERKS = 1.
<CAPP_MTK>-PLNTY = 1.
<CAPP_MTK>-PLNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CAPP_MTK-PLNAL, sy-vline,
  WA_CAPP_MTK-ZKRIZ, sy-vline,
  WA_CAPP_MTK-ZAEHL, sy-vline,
  WA_CAPP_MTK-DATUV, sy-vline,
  WA_CAPP_MTK-TECHV, sy-vline,
  WA_CAPP_MTK-AENNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CAPP_MTK 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_CAPP_MTK 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_CAPP_MTK INTO WA_CAPP_MTK.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CAPP_MTK-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CAPP_MTK-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CAPP_MTK-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CAPP_MTK-PSPNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field AENNR_AUS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CAPP_MTK-AENNR_AUS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CAPP_MTK-AENNR_AUS.
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_CAPP_MTK_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
ZKRIZ TYPE STRING,
ZAEHL TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
AENNR TYPE STRING,
LOEKZ TYPE STRING,
PARKZ TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
LIFNR TYPE STRING,
KUNR TYPE STRING,
SUCHFELD TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
PSPNR TYPE STRING,
VALID_TO TYPE STRING,
LOEKZ_INHERITED TYPE STRING,
VERSN TYPE STRING,
VERSN_SOURCE TYPE STRING,
VERSN_SOURCE_ZKRIZ TYPE STRING,
MS_OBJECT TYPE STRING,
MS_OBJTYPE TYPE STRING,
DATUB TYPE STRING,
AENNR_AUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CAPP_MTK_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_CAPP_MTK_STR-MANDT sy-vline 
WA_CAPP_MTK_STR-MATNR sy-vline 
WA_CAPP_MTK_STR-WERKS sy-vline 
WA_CAPP_MTK_STR-PLNTY sy-vline 
WA_CAPP_MTK_STR-PLNNR sy-vline 
WA_CAPP_MTK_STR-PLNAL sy-vline 
WA_CAPP_MTK_STR-ZKRIZ sy-vline 
WA_CAPP_MTK_STR-ZAEHL sy-vline 
WA_CAPP_MTK_STR-DATUV sy-vline 
WA_CAPP_MTK_STR-TECHV sy-vline 
WA_CAPP_MTK_STR-AENNR sy-vline 
WA_CAPP_MTK_STR-LOEKZ sy-vline 
WA_CAPP_MTK_STR-PARKZ sy-vline 
WA_CAPP_MTK_STR-ANDAT sy-vline 
WA_CAPP_MTK_STR-ANNAM sy-vline 
WA_CAPP_MTK_STR-AEDAT sy-vline 
WA_CAPP_MTK_STR-AENAM sy-vline 
WA_CAPP_MTK_STR-LIFNR sy-vline 
WA_CAPP_MTK_STR-KUNR sy-vline 
WA_CAPP_MTK_STR-SUCHFELD sy-vline 
WA_CAPP_MTK_STR-VBELN sy-vline 
WA_CAPP_MTK_STR-POSNR sy-vline 
WA_CAPP_MTK_STR-PSPNR sy-vline 
WA_CAPP_MTK_STR-VALID_TO sy-vline 
WA_CAPP_MTK_STR-LOEKZ_INHERITED sy-vline 
WA_CAPP_MTK_STR-VERSN sy-vline 
WA_CAPP_MTK_STR-VERSN_SOURCE sy-vline 
WA_CAPP_MTK_STR-VERSN_SOURCE_ZKRIZ sy-vline 
WA_CAPP_MTK_STR-MS_OBJECT sy-vline 
WA_CAPP_MTK_STR-MS_OBJTYPE sy-vline 
WA_CAPP_MTK_STR-DATUB sy-vline 
WA_CAPP_MTK_STR-AENNR_AUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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