ABAP Select data from SAP table ENT1044 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT1044 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 ENT1044. 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 ENT1044 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_ENT1044 TYPE STANDARD TABLE OF ENT1044,
      WA_ENT1044 TYPE ENT1044,
      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: <ENT1044> TYPE ENT1044.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT1044.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT1044
  INTO TABLE IT_ENT1044.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT1044
*  INTO TABLE @DATA(IT_ENT10442).
*--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_ENT1044 INDEX 1 INTO DATA(WA_ENT10442).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT1044 ASSIGNING <ENT1044>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT1044>-MANDT = 1.
<ENT1044>-MATNR = 1.
<ENT1044>-WERKS = 1.
<ENT1044>-LVORM = 1.
<ENT1044>-PSTAT = 1.

ENDLOOP.

LOOP AT IT_ENT1044 INTO WA_ENT1044.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT1044-PERKZ, sy-vline,
  WA_ENT1044-PERIV, sy-vline,
  WA_ENT1044-EXPME, sy-vline,
  WA_ENT1044-HERKL, sy-vline,
  WA_ENT1044-HERKR, sy-vline,
  WA_ENT1044-LADGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT1044 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_ENT1044 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_ENT1044 INTO WA_ENT1044.


*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_ENT1044-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT1044-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EXPME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ENT1044-EXPME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT1044-EXPME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT1044-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT1044-PRCTR.
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_ENT1044_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LVORM TYPE STRING,
PSTAT TYPE STRING,
PERKZ TYPE STRING,
PERIV TYPE STRING,
EXPME TYPE STRING,
HERKL TYPE STRING,
HERKR TYPE STRING,
LADGR TYPE STRING,
MTVER TYPE STRING,
MTVFP TYPE STRING,
PRCTR TYPE STRING,
STAWN TYPE STRING,
VBAMG TYPE STRING,
VBEAZ TYPE STRING,
VRVEZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT1044_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_ENT1044_STR-MANDT sy-vline 
WA_ENT1044_STR-MATNR sy-vline 
WA_ENT1044_STR-WERKS sy-vline 
WA_ENT1044_STR-LVORM sy-vline 
WA_ENT1044_STR-PSTAT sy-vline 
WA_ENT1044_STR-PERKZ sy-vline 
WA_ENT1044_STR-PERIV sy-vline 
WA_ENT1044_STR-EXPME sy-vline 
WA_ENT1044_STR-HERKL sy-vline 
WA_ENT1044_STR-HERKR sy-vline 
WA_ENT1044_STR-LADGR sy-vline 
WA_ENT1044_STR-MTVER sy-vline 
WA_ENT1044_STR-MTVFP sy-vline 
WA_ENT1044_STR-PRCTR sy-vline 
WA_ENT1044_STR-STAWN sy-vline 
WA_ENT1044_STR-VBAMG sy-vline 
WA_ENT1044_STR-VBEAZ sy-vline 
WA_ENT1044_STR-VRVEZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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