ABAP Select data from SAP table E3MKALL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E3MKALL 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 E3MKALL. 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 E3MKALL 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_E3MKALL TYPE STANDARD TABLE OF E3MKALL,
      WA_E3MKALL TYPE E3MKALL,
      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: <E3MKALL> TYPE E3MKALL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E3MKALL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E3MKALL
  INTO TABLE IT_E3MKALL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E3MKALL
*  INTO TABLE @DATA(IT_E3MKALL2).
*--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_E3MKALL INDEX 1 INTO DATA(WA_E3MKALL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E3MKALL ASSIGNING <E3MKALL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E3MKALL>-MATNR = 1.
<E3MKALL>-WERKS = 1.
<E3MKALL>-VERID = 1.
<E3MKALL>-BDATU = 1.
<E3MKALL>-ADATU = 1.

ENDLOOP.

LOOP AT IT_E3MKALL INTO WA_E3MKALL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E3MKALL-STLAL, sy-vline,
  WA_E3MKALL-STLAN, sy-vline,
  WA_E3MKALL-PLNTY, sy-vline,
  WA_E3MKALL-PLNNR, sy-vline,
  WA_E3MKALL-ALNAL, sy-vline,
  WA_E3MKALL-TEXT1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E3MKALL 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_E3MKALL 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_E3MKALL INTO WA_E3MKALL.


*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_E3MKALL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MKALL-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3MKALL-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MKALL-STLAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3MKALL-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MKALL-PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ALNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3MKALL-ALNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MKALL-ALNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_E3MKALL-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MKALL-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXE_STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3MKALL-EXE_STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MKALL-EXE_STLAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXE_PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3MKALL-EXE_PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MKALL-EXE_PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXE_ALNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3MKALL-EXE_ALNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3MKALL-EXE_ALNAL.
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_E3MKALL_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
VERID TYPE STRING,
BDATU TYPE STRING,
ADATU TYPE STRING,
STLAL TYPE STRING,
STLAN TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
ALNAL TYPE STRING,
TEXT1 TYPE STRING,
MEINS TYPE STRING,
BSTMI TYPE STRING,
BSTMA TYPE STRING,
MKSP TYPE STRING,
VERSIND TYPE STRING,
DIFFPLANEXEMSTR TYPE STRING,
EWM_LGNUM TYPE STRING,
EWM_LGPLA TYPE STRING,
EXE_STLAL TYPE STRING,
EXE_STLAN TYPE STRING,
EXE_PLNTY TYPE STRING,
EXE_PLNNR TYPE STRING,
EXE_ALNAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E3MKALL_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_E3MKALL_STR-MATNR sy-vline 
WA_E3MKALL_STR-WERKS sy-vline 
WA_E3MKALL_STR-VERID sy-vline 
WA_E3MKALL_STR-BDATU sy-vline 
WA_E3MKALL_STR-ADATU sy-vline 
WA_E3MKALL_STR-STLAL sy-vline 
WA_E3MKALL_STR-STLAN sy-vline 
WA_E3MKALL_STR-PLNTY sy-vline 
WA_E3MKALL_STR-PLNNR sy-vline 
WA_E3MKALL_STR-ALNAL sy-vline 
WA_E3MKALL_STR-TEXT1 sy-vline 
WA_E3MKALL_STR-MEINS sy-vline 
WA_E3MKALL_STR-BSTMI sy-vline 
WA_E3MKALL_STR-BSTMA sy-vline 
WA_E3MKALL_STR-MKSP sy-vline 
WA_E3MKALL_STR-VERSIND sy-vline 
WA_E3MKALL_STR-DIFFPLANEXEMSTR sy-vline 
WA_E3MKALL_STR-EWM_LGNUM sy-vline 
WA_E3MKALL_STR-EWM_LGPLA sy-vline 
WA_E3MKALL_STR-EXE_STLAL sy-vline 
WA_E3MKALL_STR-EXE_STLAN sy-vline 
WA_E3MKALL_STR-EXE_PLNTY sy-vline 
WA_E3MKALL_STR-EXE_PLNNR sy-vline 
WA_E3MKALL_STR-EXE_ALNAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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