ABAP Select data from SAP table /SAPAPO/PUIA_DEM_DMDH_DETAIL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/PUIA_DEM_DMDH_DETAIL 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 /SAPAPO/PUIA_DEM_DMDH_DETAIL. 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 /SAPAPO/PUIA_DEM_DMDH_DETAIL 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_/SAPAPO/PUIA_DEM_DMDH_DETAIL TYPE STANDARD TABLE OF /SAPAPO/PUIA_DEM_DMDH_DETAIL,
      WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL TYPE /SAPAPO/PUIA_DEM_DMDH_DETAIL,
      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: </SAPAPO/PUIA_DEM_DMDH_DETAIL> TYPE /SAPAPO/PUIA_DEM_DMDH_DETAIL.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/PUIA_DEM_DMDH_DETAIL
  INTO TABLE IT_/SAPAPO/PUIA_DEM_DMDH_DETAIL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/PUIA_DEM_DMDH_DETAIL
*  INTO TABLE @DATA(IT_/SAPAPO/PUIA_DEM_DMDH_DETAIL2).
*--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_/SAPAPO/PUIA_DEM_DMDH_DETAIL INDEX 1 INTO DATA(WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/PUIA_DEM_DMDH_DETAIL ASSIGNING </SAPAPO/PUIA_DEM_DMDH_DETAIL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/PUIA_DEM_DMDH_DETAIL>-KEYFIGURE = 1.
</SAPAPO/PUIA_DEM_DMDH_DETAIL>-PERIOD = 1.
</SAPAPO/PUIA_DEM_DMDH_DETAIL>-LOCATION = 1.
</SAPAPO/PUIA_DEM_DMDH_DETAIL>-TPOP = 1.
</SAPAPO/PUIA_DEM_DMDH_DETAIL>-VCPSTOCKING = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/PUIA_DEM_DMDH_DETAIL INTO WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL-CHANGEDATE, sy-vline,
  WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL-CHANGEDFROM, sy-vline,
  WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL-CHANGETIME, sy-vline,
  WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL-CREATEDATE, sy-vline,
  WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL-CREATEFROM, sy-vline,
  WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL-CREATETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL 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_/SAPAPO/PUIA_DEM_DMDH_DETAIL 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_/SAPAPO/PUIA_DEM_DMDH_DETAIL INTO WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL.


*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_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR, 
KEYFIGURE TYPE STRING,
PERIOD TYPE STRING,
LOCATION TYPE STRING,
TPOP TYPE STRING,
VCPSTOCKING TYPE STRING,
CHANGEDATE TYPE STRING,
CHANGEDFROM TYPE STRING,
CHANGETIME TYPE STRING,
CREATEDATE TYPE STRING,
CREATEFROM TYPE STRING,
CREATETIME TYPE STRING,
REALIGNSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_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_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-KEYFIGURE sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-PERIOD sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-LOCATION sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-TPOP sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-VCPSTOCKING sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-CHANGEDATE sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-CHANGEDFROM sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-CHANGETIME sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-CREATEDATE sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-CREATEFROM sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-CREATETIME sy-vline 
WA_/SAPAPO/PUIA_DEM_DMDH_DETAIL_STR-REALIGNSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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