ABAP Select data from SAP table PRO_ER_DTG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRO_ER_DTG
*  INTO TABLE @DATA(IT_PRO_ER_DTG2).
*--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_PRO_ER_DTG INDEX 1 INTO DATA(WA_PRO_ER_DTG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRO_ER_DTG>-BUKRS = 1.
<PRO_ER_DTG>-FPPER = 1.
<PRO_ER_DTG>-PERNR = 1.
<PRO_ER_DTG>-KOSTL = 1.
<PRO_ER_DTG>-AVWKA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRO_ER_DTG-AVWKD, sy-vline,
  WA_PRO_ER_DTG-AVWKC, sy-vline,
  WA_PRO_ER_DTG-EMPCT, sy-vline,
  WA_PRO_ER_DTG-SBGRU, sy-vline,
  WA_PRO_ER_DTG-GSBER, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PRO_ER_DTG 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_PRO_ER_DTG 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_PRO_ER_DTG INTO WA_PRO_ER_DTG.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRO_ER_DTG-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRO_ER_DTG-KOSTL.
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_PRO_ER_DTG_STR, 
BUKRS TYPE STRING,
FPPER TYPE STRING,
PERNR TYPE STRING,
KOSTL TYPE STRING,
AVWKA TYPE STRING,
AVWKD TYPE STRING,
AVWKC TYPE STRING,
EMPCT TYPE STRING,
SBGRU TYPE STRING,
GSBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRO_ER_DTG_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_PRO_ER_DTG_STR-BUKRS sy-vline 
WA_PRO_ER_DTG_STR-FPPER sy-vline 
WA_PRO_ER_DTG_STR-PERNR sy-vline 
WA_PRO_ER_DTG_STR-KOSTL sy-vline 
WA_PRO_ER_DTG_STR-AVWKA sy-vline 
WA_PRO_ER_DTG_STR-AVWKD sy-vline 
WA_PRO_ER_DTG_STR-AVWKC sy-vline 
WA_PRO_ER_DTG_STR-EMPCT sy-vline 
WA_PRO_ER_DTG_STR-SBGRU sy-vline 
WA_PRO_ER_DTG_STR-GSBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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