ABAP Select data from SAP table ENT2049 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT2049 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 ENT2049. 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 ENT2049 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_ENT2049 TYPE STANDARD TABLE OF ENT2049,
      WA_ENT2049 TYPE ENT2049,
      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: <ENT2049> TYPE ENT2049.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT2049.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT2049
  INTO TABLE IT_ENT2049.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT2049
*  INTO TABLE @DATA(IT_ENT20492).
*--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_ENT2049 INDEX 1 INTO DATA(WA_ENT20492).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT2049 ASSIGNING <ENT2049>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT2049>-MANDT = 1.
<ENT2049>-LAND1 = 1.
<ENT2049>-ZLSCH = 1.
<ENT2049>-TEXT1 = 1.
<ENT2049>-XBKKT = 1.

ENDLOOP.

LOOP AT IT_ENT2049 INTO WA_ENT2049.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT2049-XSTRA, sy-vline,
  WA_ENT2049-XEINZ, sy-vline,
  WA_ENT2049-XESRD, sy-vline,
  WA_ENT2049-XPGIR, sy-vline,
  WA_ENT2049-XEZER, sy-vline,
  WA_ENT2049-XSCHK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT2049 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_ENT2049 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_ENT2049 INTO WA_ENT2049.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ENT2049_STR, 
MANDT TYPE STRING,
LAND1 TYPE STRING,
ZLSCH TYPE STRING,
TEXT1 TYPE STRING,
XBKKT TYPE STRING,
XSTRA TYPE STRING,
XEINZ TYPE STRING,
XESRD TYPE STRING,
XPGIR TYPE STRING,
XEZER TYPE STRING,
XSCHK TYPE STRING,
PROGN TYPE STRING,
XWECH TYPE STRING,
XWANF TYPE STRING,
XPSKT TYPE STRING,
XWECS TYPE STRING,
BLART TYPE STRING,
BLARV TYPE STRING,
UMSKZ TYPE STRING,
XSWEC TYPE STRING,
TXTSL TYPE STRING,
ZLSTN TYPE STRING,
WLSTN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT2049_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_ENT2049_STR-MANDT sy-vline 
WA_ENT2049_STR-LAND1 sy-vline 
WA_ENT2049_STR-ZLSCH sy-vline 
WA_ENT2049_STR-TEXT1 sy-vline 
WA_ENT2049_STR-XBKKT sy-vline 
WA_ENT2049_STR-XSTRA sy-vline 
WA_ENT2049_STR-XEINZ sy-vline 
WA_ENT2049_STR-XESRD sy-vline 
WA_ENT2049_STR-XPGIR sy-vline 
WA_ENT2049_STR-XEZER sy-vline 
WA_ENT2049_STR-XSCHK sy-vline 
WA_ENT2049_STR-PROGN sy-vline 
WA_ENT2049_STR-XWECH sy-vline 
WA_ENT2049_STR-XWANF sy-vline 
WA_ENT2049_STR-XPSKT sy-vline 
WA_ENT2049_STR-XWECS sy-vline 
WA_ENT2049_STR-BLART sy-vline 
WA_ENT2049_STR-BLARV sy-vline 
WA_ENT2049_STR-UMSKZ sy-vline 
WA_ENT2049_STR-XSWEC sy-vline 
WA_ENT2049_STR-TXTSL sy-vline 
WA_ENT2049_STR-ZLSTN sy-vline 
WA_ENT2049_STR-WLSTN sy-vline      INTO ld_text SEPARATED BY SPACE.

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