ABAP Select data from SAP table MCEKKO_B into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCEKKO_B
*  INTO TABLE @DATA(IT_MCEKKO_B2).
*--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_MCEKKO_B INDEX 1 INTO DATA(WA_MCEKKO_B2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCEKKO_B>-SUPKZ = 1.
<MCEKKO_B>-MANDT = 1.
<MCEKKO_B>-EBELN = 1.
<MCEKKO_B>-BUKRS = 1.
<MCEKKO_B>-BSTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCEKKO_B-BSART, sy-vline,
  WA_MCEKKO_B-BSAKZ, sy-vline,
  WA_MCEKKO_B-LOEKZ, sy-vline,
  WA_MCEKKO_B-LIFNR, sy-vline,
  WA_MCEKKO_B-EKORG, sy-vline,
  WA_MCEKKO_B-EKGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCEKKO_B 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_MCEKKO_B 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_MCEKKO_B INTO WA_MCEKKO_B.


*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_MCEKKO_B-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKKO_B-EBELN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCEKKO_B-LOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCEKKO_B-LOGSY.
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_MCEKKO_B_STR, 
SUPKZ TYPE STRING,
MANDT TYPE STRING,
EBELN TYPE STRING,
BUKRS TYPE STRING,
BSTYP TYPE STRING,
BSART TYPE STRING,
BSAKZ TYPE STRING,
LOEKZ TYPE STRING,
LIFNR TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
WAERS TYPE STRING,
WKURS TYPE STRING,
KUFIX TYPE STRING,
BEDAT TYPE STRING,
LLIEF TYPE STRING,
KUNNR TYPE STRING,
RESWK TYPE STRING,
LBLIF TYPE STRING,
KTWRT TYPE STRING,
SUBMI TYPE STRING,
KNUMV TYPE STRING,
STAFO TYPE STRING,
LIFRE TYPE STRING,
FRGRL TYPE STRING,
STAKO TYPE STRING,
KALSM TYPE STRING,
KORNR TYPE STRING,
RESBU TYPE STRING,
MEMORY TYPE STRING,
REVNO TYPE STRING,
KONZS TYPE STRING,
LAND1 TYPE STRING,
HWAER TYPE STRING,
SYDAT TYPE STRING,
KZKPF TYPE STRING,
BUDAT TYPE STRING,
ARECH TYPE STRING,
AGUTS TYPE STRING,
BTRTYPA TYPE STRING,
BRESWK TYPE STRING,
DUMMY TYPE STRING,
FSH_TRANSACTION TYPE STRING,
FSH_ITEM_GROUP TYPE STRING,
FSH_VAS_LAST_ITEM TYPE STRING,
ORGLOGSY TYPE STRING,
LOGSY TYPE STRING,
STATU TYPE STRING,
KDATB TYPE STRING,
KDATE TYPE STRING,
ALIEF TYPE STRING,
RESBU_XX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCEKKO_B_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_MCEKKO_B_STR-SUPKZ sy-vline 
WA_MCEKKO_B_STR-MANDT sy-vline 
WA_MCEKKO_B_STR-EBELN sy-vline 
WA_MCEKKO_B_STR-BUKRS sy-vline 
WA_MCEKKO_B_STR-BSTYP sy-vline 
WA_MCEKKO_B_STR-BSART sy-vline 
WA_MCEKKO_B_STR-BSAKZ sy-vline 
WA_MCEKKO_B_STR-LOEKZ sy-vline 
WA_MCEKKO_B_STR-LIFNR sy-vline 
WA_MCEKKO_B_STR-EKORG sy-vline 
WA_MCEKKO_B_STR-EKGRP sy-vline 
WA_MCEKKO_B_STR-WAERS sy-vline 
WA_MCEKKO_B_STR-WKURS sy-vline 
WA_MCEKKO_B_STR-KUFIX sy-vline 
WA_MCEKKO_B_STR-BEDAT sy-vline 
WA_MCEKKO_B_STR-LLIEF sy-vline 
WA_MCEKKO_B_STR-KUNNR sy-vline 
WA_MCEKKO_B_STR-RESWK sy-vline 
WA_MCEKKO_B_STR-LBLIF sy-vline 
WA_MCEKKO_B_STR-KTWRT sy-vline 
WA_MCEKKO_B_STR-SUBMI sy-vline 
WA_MCEKKO_B_STR-KNUMV sy-vline 
WA_MCEKKO_B_STR-STAFO sy-vline 
WA_MCEKKO_B_STR-LIFRE sy-vline 
WA_MCEKKO_B_STR-FRGRL sy-vline 
WA_MCEKKO_B_STR-STAKO sy-vline 
WA_MCEKKO_B_STR-KALSM sy-vline 
WA_MCEKKO_B_STR-KORNR sy-vline 
WA_MCEKKO_B_STR-RESBU sy-vline 
WA_MCEKKO_B_STR-MEMORY sy-vline 
WA_MCEKKO_B_STR-REVNO sy-vline 
WA_MCEKKO_B_STR-KONZS sy-vline 
WA_MCEKKO_B_STR-LAND1 sy-vline 
WA_MCEKKO_B_STR-HWAER sy-vline 
WA_MCEKKO_B_STR-SYDAT sy-vline 
WA_MCEKKO_B_STR-KZKPF sy-vline 
WA_MCEKKO_B_STR-BUDAT sy-vline 
WA_MCEKKO_B_STR-ARECH sy-vline 
WA_MCEKKO_B_STR-AGUTS sy-vline 
WA_MCEKKO_B_STR-BTRTYPA sy-vline 
WA_MCEKKO_B_STR-BRESWK sy-vline 
WA_MCEKKO_B_STR-DUMMY sy-vline 
WA_MCEKKO_B_STR-FSH_TRANSACTION sy-vline 
WA_MCEKKO_B_STR-FSH_ITEM_GROUP sy-vline 
WA_MCEKKO_B_STR-FSH_VAS_LAST_ITEM sy-vline 
WA_MCEKKO_B_STR-ORGLOGSY sy-vline 
WA_MCEKKO_B_STR-LOGSY sy-vline 
WA_MCEKKO_B_STR-STATU sy-vline 
WA_MCEKKO_B_STR-KDATB sy-vline 
WA_MCEKKO_B_STR-KDATE sy-vline 
WA_MCEKKO_B_STR-ALIEF sy-vline 
WA_MCEKKO_B_STR-RESBU_XX sy-vline      INTO ld_text SEPARATED BY SPACE.

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