ABAP Select data from SAP table MC45W_0LST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MC45W_0LST 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 MC45W_0LST. 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 MC45W_0LST 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_MC45W_0LST TYPE STANDARD TABLE OF MC45W_0LST,
      WA_MC45W_0LST TYPE MC45W_0LST,
      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: <MC45W_0LST> TYPE MC45W_0LST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MC45W_0LST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MC45W_0LST
  INTO TABLE IT_MC45W_0LST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MC45W_0LST
*  INTO TABLE @DATA(IT_MC45W_0LST2).
*--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_MC45W_0LST INDEX 1 INTO DATA(WA_MC45W_0LST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MC45W_0LST ASSIGNING <MC45W_0LST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MC45W_0LST>-ROCANCEL = 1.
<MC45W_0LST>-ABART = 1.
<MC45W_0LST>-AEDAT = 1.
<MC45W_0LST>-BLDAT = 1.
<MC45W_0LST>-BRTWR = 1.

ENDLOOP.

LOOP AT IT_MC45W_0LST INTO WA_MC45W_0LST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MC45W_0LST-BRTWRD, sy-vline,
  WA_MC45W_0LST-BUKRS, sy-vline,
  WA_MC45W_0LST-COLLECTION_TYPE, sy-vline,
  WA_MC45W_0LST-CONTRACT, sy-vline,
  WA_MC45W_0LST-CONTRACT_TYPE, sy-vline,
  WA_MC45W_0LST-CPDK_ADDR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MC45W_0LST 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_MC45W_0LST 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_MC45W_0LST INTO WA_MC45W_0LST.


*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 CONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-CONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-CONTRACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CPDK_ADDR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-CPDK_ADDR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-CPDK_ADDR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SETTLE_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-SETTLE_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-SETTLE_DOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STAFO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-STAFO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-STAFO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WBELN_RL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-WBELN_RL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-WBELN_RL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-WKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-WKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-KUNRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-KUNRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-KUNRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-LIFRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-LIFRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRZB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-LNRZB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-LNRZB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-WBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WBELN_LF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC45W_0LST-WBELN_LF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC45W_0LST-WBELN_LF.
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_MC45W_0LST_STR, 
ROCANCEL TYPE STRING,
ABART TYPE STRING,
AEDAT TYPE STRING,
BLDAT TYPE STRING,
BRTWR TYPE STRING,
BRTWRD TYPE STRING,
BUKRS TYPE STRING,
COLLECTION_TYPE TYPE STRING,
CONTRACT TYPE STRING,
CONTRACT_TYPE TYPE STRING,
CPDK_ADDR TYPE STRING,
EKGRP TYPE STRING,
EKORG TYPE STRING,
ERDAT TYPE STRING,
FKSTO_PART TYPE STRING,
FKSTO_PARTY TYPE STRING,
GSKTO TYPE STRING,
GSKTOD TYPE STRING,
HWAER TYPE STRING,
KKBER TYPE STRING,
KURST TYPE STRING,
LANDL TYPE STRING,
LFART TYPE STRING,
LFART_RL TYPE STRING,
LFGRU TYPE STRING,
MWSBK TYPE STRING,
MWSBKD TYPE STRING,
POST_PARTY TYPE STRING,
SETTLE_CATEGORY TYPE STRING,
SETTLE_DOC TYPE STRING,
SPART TYPE STRING,
STAFO TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
WAERL TYPE STRING,
WBELN_RL TYPE STRING,
WBTYP TYPE STRING,
WDTYP TYPE STRING,
WFDAT TYPE STRING,
WFDAT_RL TYPE STRING,
WKURS TYPE STRING,
WRART TYPE STRING,
WRTYP TYPE STRING,
WSTWAE TYPE STRING,
ZEITP TYPE STRING,
KUNRE TYPE STRING,
KUNRG TYPE STRING,
KWERT_RL TYPE STRING,
LFTYP TYPE STRING,
LIFRE TYPE STRING,
LNRZB TYPE STRING,
LOGSYS TYPE STRING,
MWSBP TYPE STRING,
MWSBP_RL TYPE STRING,
NAVNW TYPE STRING,
NETWR TYPE STRING,
POSNR TYPE STRING,
WBELN TYPE STRING,
WBELN_LF TYPE STRING,
PERIV TYPE STRING,
ANZVGRL TYPE STRING,
ANZVGLF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MC45W_0LST_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_MC45W_0LST_STR-ROCANCEL sy-vline 
WA_MC45W_0LST_STR-ABART sy-vline 
WA_MC45W_0LST_STR-AEDAT sy-vline 
WA_MC45W_0LST_STR-BLDAT sy-vline 
WA_MC45W_0LST_STR-BRTWR sy-vline 
WA_MC45W_0LST_STR-BRTWRD sy-vline 
WA_MC45W_0LST_STR-BUKRS sy-vline 
WA_MC45W_0LST_STR-COLLECTION_TYPE sy-vline 
WA_MC45W_0LST_STR-CONTRACT sy-vline 
WA_MC45W_0LST_STR-CONTRACT_TYPE sy-vline 
WA_MC45W_0LST_STR-CPDK_ADDR sy-vline 
WA_MC45W_0LST_STR-EKGRP sy-vline 
WA_MC45W_0LST_STR-EKORG sy-vline 
WA_MC45W_0LST_STR-ERDAT sy-vline 
WA_MC45W_0LST_STR-FKSTO_PART sy-vline 
WA_MC45W_0LST_STR-FKSTO_PARTY sy-vline 
WA_MC45W_0LST_STR-GSKTO sy-vline 
WA_MC45W_0LST_STR-GSKTOD sy-vline 
WA_MC45W_0LST_STR-HWAER sy-vline 
WA_MC45W_0LST_STR-KKBER sy-vline 
WA_MC45W_0LST_STR-KURST sy-vline 
WA_MC45W_0LST_STR-LANDL sy-vline 
WA_MC45W_0LST_STR-LFART sy-vline 
WA_MC45W_0LST_STR-LFART_RL sy-vline 
WA_MC45W_0LST_STR-LFGRU sy-vline 
WA_MC45W_0LST_STR-MWSBK sy-vline 
WA_MC45W_0LST_STR-MWSBKD sy-vline 
WA_MC45W_0LST_STR-POST_PARTY sy-vline 
WA_MC45W_0LST_STR-SETTLE_CATEGORY sy-vline 
WA_MC45W_0LST_STR-SETTLE_DOC sy-vline 
WA_MC45W_0LST_STR-SPART sy-vline 
WA_MC45W_0LST_STR-STAFO sy-vline 
WA_MC45W_0LST_STR-VKBUR sy-vline 
WA_MC45W_0LST_STR-VKGRP sy-vline 
WA_MC45W_0LST_STR-VKORG sy-vline 
WA_MC45W_0LST_STR-VTWEG sy-vline 
WA_MC45W_0LST_STR-WAERL sy-vline 
WA_MC45W_0LST_STR-WBELN_RL sy-vline 
WA_MC45W_0LST_STR-WBTYP sy-vline 
WA_MC45W_0LST_STR-WDTYP sy-vline 
WA_MC45W_0LST_STR-WFDAT sy-vline 
WA_MC45W_0LST_STR-WFDAT_RL sy-vline 
WA_MC45W_0LST_STR-WKURS sy-vline 
WA_MC45W_0LST_STR-WRART sy-vline 
WA_MC45W_0LST_STR-WRTYP sy-vline 
WA_MC45W_0LST_STR-WSTWAE sy-vline 
WA_MC45W_0LST_STR-ZEITP sy-vline 
WA_MC45W_0LST_STR-KUNRE sy-vline 
WA_MC45W_0LST_STR-KUNRG sy-vline 
WA_MC45W_0LST_STR-KWERT_RL sy-vline 
WA_MC45W_0LST_STR-LFTYP sy-vline 
WA_MC45W_0LST_STR-LIFRE sy-vline 
WA_MC45W_0LST_STR-LNRZB sy-vline 
WA_MC45W_0LST_STR-LOGSYS sy-vline 
WA_MC45W_0LST_STR-MWSBP sy-vline 
WA_MC45W_0LST_STR-MWSBP_RL sy-vline 
WA_MC45W_0LST_STR-NAVNW sy-vline 
WA_MC45W_0LST_STR-NETWR sy-vline 
WA_MC45W_0LST_STR-POSNR sy-vline 
WA_MC45W_0LST_STR-WBELN sy-vline 
WA_MC45W_0LST_STR-WBELN_LF sy-vline 
WA_MC45W_0LST_STR-PERIV sy-vline 
WA_MC45W_0LST_STR-ANZVGRL sy-vline 
WA_MC45W_0LST_STR-ANZVGLF sy-vline      INTO ld_text SEPARATED BY SPACE.

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