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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/PDEM_DEMHIS_STR
*  INTO TABLE @DATA(IT_/SAPAPO/PDEM_DEMHIS_STR2).
*--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/PDEM_DEMHIS_STR INDEX 1 INTO DATA(WA_/SAPAPO/PDEM_DEMHIS_STR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/PDEM_DEMHIS_STR>-PRODUCT = 1.
</SAPAPO/PDEM_DEMHIS_STR>-FACING = 1.
</SAPAPO/PDEM_DEMHIS_STR>-STOCKING = 1.
</SAPAPO/PDEM_DEMHIS_STR>-DEM_CAT = 1.
</SAPAPO/PDEM_DEMHIS_STR>-CALWEEK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/PDEM_DEMHIS_STR-CALMONTH, sy-vline,
  WA_/SAPAPO/PDEM_DEMHIS_STR-CALPERIOD, sy-vline,
  WA_/SAPAPO/PDEM_DEMHIS_STR-FISCVAR, sy-vline,
  WA_/SAPAPO/PDEM_DEMHIS_STR-TPOP, sy-vline,
  WA_/SAPAPO/PDEM_DEMHIS_STR-VCP_FA, sy-vline,
  WA_/SAPAPO/PDEM_DEMHIS_STR-VCP_ST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/PDEM_DEMHIS_STR 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/PDEM_DEMHIS_STR 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/PDEM_DEMHIS_STR INTO WA_/SAPAPO/PDEM_DEMHIS_STR.


*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 PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/PDEM_DEMHIS_STR-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/PDEM_DEMHIS_STR-PRODUCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI6, internal->external for field CALWEEK
CALL FUNCTION 'CONVERSION_EXIT_PERI6_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/PDEM_DEMHIS_STR-CALWEEK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/PDEM_DEMHIS_STR-CALWEEK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI6, internal->external for field CALMONTH
CALL FUNCTION 'CONVERSION_EXIT_PERI6_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/PDEM_DEMHIS_STR-CALMONTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/PDEM_DEMHIS_STR-CALMONTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field CALPERIOD
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/PDEM_DEMHIS_STR-CALPERIOD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/PDEM_DEMHIS_STR-CALPERIOD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASE_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/PDEM_DEMHIS_STR-BASE_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/PDEM_DEMHIS_STR-BASE_UOM.
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_/SAPAPO/PDEM_DEMHIS_STR_STR, 
PRODUCT TYPE STRING,
FACING TYPE STRING,
STOCKING TYPE STRING,
DEM_CAT TYPE STRING,
CALWEEK TYPE STRING,
CALMONTH TYPE STRING,
CALPERIOD TYPE STRING,
FISCVAR TYPE STRING,
TPOP TYPE STRING,
VCP_FA TYPE STRING,
VCP_ST TYPE STRING,
EMER_ORD TYPE STRING,
FCSTABLE TYPE STRING,
RECORDMODE TYPE STRING,
BASE_UOM TYPE STRING,
ORD_LINE TYPE STRING,
DEM_QTY TYPE STRING,
SC_QTY_W TYPE STRING,
SC_QTY_P TYPE STRING,
SC_QTY_M TYPE STRING,
SC_EN_M TYPE STRING,
SC_EN_P TYPE STRING,
SC_EN_W TYPE STRING,
FIN_QTY_W TYPE STRING,
FIN_QTY_P TYPE STRING,
FIN_QTY_M TYPE STRING,
FIN_EN_M TYPE STRING,
FIN_EN_P TYPE STRING,
FIN_EN_W TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/PDEM_DEMHIS_STR_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/PDEM_DEMHIS_STR_STR-PRODUCT sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FACING sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-STOCKING sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-DEM_CAT sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-CALWEEK sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-CALMONTH sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-CALPERIOD sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FISCVAR sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-TPOP sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-VCP_FA sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-VCP_ST sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-EMER_ORD sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FCSTABLE sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-RECORDMODE sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-BASE_UOM sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-ORD_LINE sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-DEM_QTY sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-SC_QTY_W sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-SC_QTY_P sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-SC_QTY_M sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-SC_EN_M sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-SC_EN_P sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-SC_EN_W sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FIN_QTY_W sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FIN_QTY_P sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FIN_QTY_M sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FIN_EN_M sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FIN_EN_P sy-vline 
WA_/SAPAPO/PDEM_DEMHIS_STR_STR-FIN_EN_W sy-vline      INTO ld_text SEPARATED BY SPACE.

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