ABAP Select data from SAP table ENT1045 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT1045 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 ENT1045. 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 ENT1045 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_ENT1045 TYPE STANDARD TABLE OF ENT1045,
      WA_ENT1045 TYPE ENT1045,
      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: <ENT1045> TYPE ENT1045.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT1045.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT1045
  INTO TABLE IT_ENT1045.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT1045
*  INTO TABLE @DATA(IT_ENT10452).
*--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_ENT1045 INDEX 1 INTO DATA(WA_ENT10452).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT1045 ASSIGNING <ENT1045>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT1045>-MANDT = 1.
<ENT1045>-MATNR = 1.
<ENT1045>-WERKS = 1.
<ENT1045>-LVORM = 1.
<ENT1045>-PSTAT = 1.

ENDLOOP.

LOOP AT IT_ENT1045 INTO WA_ENT1045.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT1045-PERKZ, sy-vline,
  WA_ENT1045-PERIV, sy-vline,
  WA_ENT1045-EKGRP, sy-vline,
  WA_ENT1045-EXPME, sy-vline,
  WA_ENT1045-HERKL, sy-vline,
  WA_ENT1045-HERKR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT1045 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_ENT1045 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_ENT1045 INTO WA_ENT1045.


*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_ENT1045-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT1045-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EXPME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ENT1045-EXPME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT1045-EXPME.
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_ENT1045_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LVORM TYPE STRING,
PSTAT TYPE STRING,
PERKZ TYPE STRING,
PERIV TYPE STRING,
EKGRP TYPE STRING,
EXPME TYPE STRING,
HERKL TYPE STRING,
HERKR TYPE STRING,
KAUTB TYPE STRING,
KORDB TYPE STRING,
STAWN TYPE STRING,
KZKRI TYPE STRING,
MMSTA TYPE STRING,
QMATV TYPE STRING,
USEQU TYPE STRING,
WEBAZ TYPE STRING,
XCHPF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT1045_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_ENT1045_STR-MANDT sy-vline 
WA_ENT1045_STR-MATNR sy-vline 
WA_ENT1045_STR-WERKS sy-vline 
WA_ENT1045_STR-LVORM sy-vline 
WA_ENT1045_STR-PSTAT sy-vline 
WA_ENT1045_STR-PERKZ sy-vline 
WA_ENT1045_STR-PERIV sy-vline 
WA_ENT1045_STR-EKGRP sy-vline 
WA_ENT1045_STR-EXPME sy-vline 
WA_ENT1045_STR-HERKL sy-vline 
WA_ENT1045_STR-HERKR sy-vline 
WA_ENT1045_STR-KAUTB sy-vline 
WA_ENT1045_STR-KORDB sy-vline 
WA_ENT1045_STR-STAWN sy-vline 
WA_ENT1045_STR-KZKRI sy-vline 
WA_ENT1045_STR-MMSTA sy-vline 
WA_ENT1045_STR-QMATV sy-vline 
WA_ENT1045_STR-USEQU sy-vline 
WA_ENT1045_STR-WEBAZ sy-vline 
WA_ENT1045_STR-XCHPF sy-vline      INTO ld_text SEPARATED BY SPACE.

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