ABAP Select data from SAP table CKMLCR_SRC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKMLCR_SRC
*  INTO TABLE @DATA(IT_CKMLCR_SRC2).
*--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_CKMLCR_SRC INDEX 1 INTO DATA(WA_CKMLCR_SRC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKMLCR_SRC>-CLIENT = 1.
<CKMLCR_SRC>-SOURCE_SYSTEM = 1.
<CKMLCR_SRC>-SOURCE_ID = 1.
<CKMLCR_SRC>-BWKEY = 1.
<CKMLCR_SRC>-BWTAR = 1.

ENDLOOP.

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

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


*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 GJAHR, internal->external for field BDATJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CKMLCR_SRC-BDATJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLCR_SRC-BDATJ.
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_CKMLCR_SRC_STR, 
CLIENT TYPE STRING,
SOURCE_SYSTEM TYPE STRING,
SOURCE_ID TYPE STRING,
BWKEY TYPE STRING,
BWTAR 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,
SOURCE_RECENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKMLCR_SRC_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_CKMLCR_SRC_STR-CLIENT sy-vline 
WA_CKMLCR_SRC_STR-SOURCE_SYSTEM sy-vline 
WA_CKMLCR_SRC_STR-SOURCE_ID sy-vline 
WA_CKMLCR_SRC_STR-BWKEY sy-vline 
WA_CKMLCR_SRC_STR-BWTAR sy-vline 
WA_CKMLCR_SRC_STR-KALNR sy-vline 
WA_CKMLCR_SRC_STR-BDATJ sy-vline 
WA_CKMLCR_SRC_STR-POPER sy-vline 
WA_CKMLCR_SRC_STR-UNTPER sy-vline 
WA_CKMLCR_SRC_STR-CURTP sy-vline 
WA_CKMLCR_SRC_STR-PEINH sy-vline 
WA_CKMLCR_SRC_STR-VPRSV sy-vline 
WA_CKMLCR_SRC_STR-STPRS sy-vline 
WA_CKMLCR_SRC_STR-PVPRS sy-vline 
WA_CKMLCR_SRC_STR-WAERS sy-vline 
WA_CKMLCR_SRC_STR-SALK3 sy-vline 
WA_CKMLCR_SRC_STR-SALKV sy-vline 
WA_CKMLCR_SRC_STR-ZUUMB_O sy-vline 
WA_CKMLCR_SRC_STR-ABPRD_O sy-vline 
WA_CKMLCR_SRC_STR-ABKDM_O sy-vline 
WA_CKMLCR_SRC_STR-ZUPRD_O sy-vline 
WA_CKMLCR_SRC_STR-ZUKDM_O sy-vline 
WA_CKMLCR_SRC_STR-VPPRD_O sy-vline 
WA_CKMLCR_SRC_STR-VPKDM_O sy-vline 
WA_CKMLCR_SRC_STR-VPPBPRD_O sy-vline 
WA_CKMLCR_SRC_STR-VPPBKDM_O sy-vline 
WA_CKMLCR_SRC_STR-VNPRD_O sy-vline 
WA_CKMLCR_SRC_STR-VNKDM_O sy-vline 
WA_CKMLCR_SRC_STR-EKPRD_O sy-vline 
WA_CKMLCR_SRC_STR-EKKDM_O sy-vline 
WA_CKMLCR_SRC_STR-PBPRD_O sy-vline 
WA_CKMLCR_SRC_STR-PBKDM_O sy-vline 
WA_CKMLCR_SRC_STR-VNPRD_EA sy-vline 
WA_CKMLCR_SRC_STR-VNKDM_EA sy-vline 
WA_CKMLCR_SRC_STR-EBPRD_EA sy-vline 
WA_CKMLCR_SRC_STR-EBKDM_EA sy-vline 
WA_CKMLCR_SRC_STR-ZUUMB_A sy-vline 
WA_CKMLCR_SRC_STR-ZUPRD_A sy-vline 
WA_CKMLCR_SRC_STR-ZUKDM_A sy-vline 
WA_CKMLCR_SRC_STR-EKPRD_A sy-vline 
WA_CKMLCR_SRC_STR-EKKDM_A sy-vline 
WA_CKMLCR_SRC_STR-PBPRD_A sy-vline 
WA_CKMLCR_SRC_STR-PBKDM_A sy-vline 
WA_CKMLCR_SRC_STR-ABPRD_MO sy-vline 
WA_CKMLCR_SRC_STR-ABKDM_MO sy-vline 
WA_CKMLCR_SRC_STR-ZUPRD_MO sy-vline 
WA_CKMLCR_SRC_STR-ZUKDM_MO sy-vline 
WA_CKMLCR_SRC_STR-VNPRD_MA sy-vline 
WA_CKMLCR_SRC_STR-VNKDM_MA sy-vline 
WA_CKMLCR_SRC_STR-EBPRD_MA sy-vline 
WA_CKMLCR_SRC_STR-EBKDM_MA sy-vline 
WA_CKMLCR_SRC_STR-ABSALK3 sy-vline 
WA_CKMLCR_SRC_STR-ZUKDM_OST sy-vline 
WA_CKMLCR_SRC_STR-EKKDM_OST sy-vline 
WA_CKMLCR_SRC_STR-PBKDM_OST sy-vline 
WA_CKMLCR_SRC_STR-VPKDM_OST sy-vline 
WA_CKMLCR_SRC_STR-VPPBKDM_OST sy-vline 
WA_CKMLCR_SRC_STR-VNKDM_OST sy-vline 
WA_CKMLCR_SRC_STR-MARKUP_O sy-vline 
WA_CKMLCR_SRC_STR-VKSAL sy-vline 
WA_CKMLCR_SRC_STR-SOURCE_RECENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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