ABAP Select data from SAP table MDG_BS_MAT_S_MLA_CKMLCR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDG_BS_MAT_S_MLA_CKMLCR
*  INTO TABLE @DATA(IT_MDG_BS_MAT_S_MLA_CKMLCR2).
*--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_MDG_BS_MAT_S_MLA_CKMLCR INDEX 1 INTO DATA(WA_MDG_BS_MAT_S_MLA_CKMLCR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDG_BS_MAT_S_MLA_CKMLCR>-MATNR = 1.
<MDG_BS_MAT_S_MLA_CKMLCR>-BWKEY = 1.
<MDG_BS_MAT_S_MLA_CKMLCR>-BWTAR = 1.
<MDG_BS_MAT_S_MLA_CKMLCR>-MANDT = 1.
<MDG_BS_MAT_S_MLA_CKMLCR>-KALNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDG_BS_MAT_S_MLA_CKMLCR-BDATJ, sy-vline,
  WA_MDG_BS_MAT_S_MLA_CKMLCR-POPER, sy-vline,
  WA_MDG_BS_MAT_S_MLA_CKMLCR-UNTPER, sy-vline,
  WA_MDG_BS_MAT_S_MLA_CKMLCR-CURTP, sy-vline,
  WA_MDG_BS_MAT_S_MLA_CKMLCR-PEINH, sy-vline,
  WA_MDG_BS_MAT_S_MLA_CKMLCR-VPRSV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDG_BS_MAT_S_MLA_CKMLCR 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_MDG_BS_MAT_S_MLA_CKMLCR 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_MDG_BS_MAT_S_MLA_CKMLCR INTO WA_MDG_BS_MAT_S_MLA_CKMLCR.


*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_MDG_BS_MAT_S_MLA_CKMLCR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_BS_MAT_S_MLA_CKMLCR-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field BDATJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MDG_BS_MAT_S_MLA_CKMLCR-BDATJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_BS_MAT_S_MLA_CKMLCR-BDATJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDG_BS_MAT_S_MLA_CKMLCR-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_BS_MAT_S_MLA_CKMLCR-RLDNR.
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_MDG_BS_MAT_S_MLA_CKMLCR_STR, 
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
MANDT TYPE STRING,
KALNR TYPE STRING,
BDATJ TYPE STRING,
POPER TYPE STRING,
UNTPER TYPE STRING,
CURTP TYPE STRING,
PEINH TYPE STRING,
VPRSV TYPE STRING,
STPRS TYPE STRING,
PVPRS TYPE STRING,
WAERS TYPE STRING,
SALK3 TYPE STRING,
SALKV TYPE STRING,
ZUUMB_O TYPE STRING,
ABPRD_O TYPE STRING,
ABKDM_O TYPE STRING,
ZUPRD_O TYPE STRING,
ZUKDM_O TYPE STRING,
VPPRD_O TYPE STRING,
VPKDM_O TYPE STRING,
VPPBPRD_O TYPE STRING,
VPPBKDM_O TYPE STRING,
VNPRD_O TYPE STRING,
VNKDM_O TYPE STRING,
EKPRD_O TYPE STRING,
EKKDM_O TYPE STRING,
PBPRD_O TYPE STRING,
PBKDM_O TYPE STRING,
VNPRD_EA TYPE STRING,
VNKDM_EA TYPE STRING,
EBPRD_EA TYPE STRING,
EBKDM_EA TYPE STRING,
ZUUMB_A TYPE STRING,
ZUPRD_A TYPE STRING,
ZUKDM_A TYPE STRING,
EKPRD_A TYPE STRING,
EKKDM_A TYPE STRING,
PBPRD_A TYPE STRING,
PBKDM_A TYPE STRING,
ABPRD_MO TYPE STRING,
ABKDM_MO TYPE STRING,
ZUPRD_MO TYPE STRING,
ZUKDM_MO TYPE STRING,
VNPRD_MA TYPE STRING,
VNKDM_MA TYPE STRING,
EBPRD_MA TYPE STRING,
EBKDM_MA TYPE STRING,
ABSALK3 TYPE STRING,
ZUKDM_OST TYPE STRING,
EKKDM_OST TYPE STRING,
PBKDM_OST TYPE STRING,
VPKDM_OST TYPE STRING,
VPPBKDM_OST TYPE STRING,
VNKDM_OST TYPE STRING,
MARKUP_O TYPE STRING,
VKSAL TYPE STRING,
SDM_VERSION TYPE STRING,
BWTTY TYPE STRING,
RLDNR TYPE STRING,
EXT_CURTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDG_BS_MAT_S_MLA_CKMLCR_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_MDG_BS_MAT_S_MLA_CKMLCR_STR-MATNR sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-BWKEY sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-BWTAR sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-MANDT sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-KALNR sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-BDATJ sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-POPER sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-UNTPER sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-CURTP sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-PEINH sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VPRSV sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-STPRS sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-PVPRS sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-WAERS sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-SALK3 sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-SALKV sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUUMB_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ABPRD_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ABKDM_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUPRD_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUKDM_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VPPRD_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VPKDM_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VPPBPRD_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VPPBKDM_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VNPRD_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VNKDM_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EKPRD_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EKKDM_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-PBPRD_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-PBKDM_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VNPRD_EA sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VNKDM_EA sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EBPRD_EA sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EBKDM_EA sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUUMB_A sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUPRD_A sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUKDM_A sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EKPRD_A sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EKKDM_A sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-PBPRD_A sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-PBKDM_A sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ABPRD_MO sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ABKDM_MO sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUPRD_MO sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUKDM_MO sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VNPRD_MA sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VNKDM_MA sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EBPRD_MA sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EBKDM_MA sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ABSALK3 sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-ZUKDM_OST sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EKKDM_OST sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-PBKDM_OST sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VPKDM_OST sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VPPBKDM_OST sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VNKDM_OST sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-MARKUP_O sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-VKSAL sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-SDM_VERSION sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-BWTTY sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-RLDNR sy-vline 
WA_MDG_BS_MAT_S_MLA_CKMLCR_STR-EXT_CURTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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