ABAP Select data from SAP table P12DMUP_T_OCCU_ORIG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P12DMUP_T_OCCU_ORIG 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 P12DMUP_T_OCCU_ORIG. 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 P12DMUP_T_OCCU_ORIG 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_P12DMUP_T_OCCU_ORIG TYPE STANDARD TABLE OF P12DMUP_T_OCCU_ORIG,
      WA_P12DMUP_T_OCCU_ORIG TYPE P12DMUP_T_OCCU_ORIG,
      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: <P12DMUP_T_OCCU_ORIG> TYPE P12DMUP_T_OCCU_ORIG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P12DMUP_T_OCCU_ORIG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P12DMUP_T_OCCU_ORIG
  INTO TABLE IT_P12DMUP_T_OCCU_ORIG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P12DMUP_T_OCCU_ORIG
*  INTO TABLE @DATA(IT_P12DMUP_T_OCCU_ORIG2).
*--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_P12DMUP_T_OCCU_ORIG INDEX 1 INTO DATA(WA_P12DMUP_T_OCCU_ORIG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P12DMUP_T_OCCU_ORIG ASSIGNING <P12DMUP_T_OCCU_ORIG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P12DMUP_T_OCCU_ORIG>-SECTN = 1.
<P12DMUP_T_OCCU_ORIG>-NREMP = 1.
<P12DMUP_T_OCCU_ORIG>-OCBEG = 1.
<P12DMUP_T_OCCU_ORIG>-OCEND = 1.
<P12DMUP_T_OCCU_ORIG>-OCCOM = 1.

ENDLOOP.

LOOP AT IT_P12DMUP_T_OCCU_ORIG INTO WA_P12DMUP_T_OCCU_ORIG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P12DMUP_T_OCCU_ORIG-WDS, sy-vline,
  WA_P12DMUP_T_OCCU_ORIG-CTTYP, sy-vline,
  WA_P12DMUP_T_OCCU_ORIG-RFMWH, sy-vline,
  WA_P12DMUP_T_OCCU_ORIG-WRKRS, sy-vline,
  WA_P12DMUP_T_OCCU_ORIG-MWHWK, sy-vline,
  WA_P12DMUP_T_OCCU_ORIG-REMES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P12DMUP_T_OCCU_ORIG 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_P12DMUP_T_OCCU_ORIG 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_P12DMUP_T_OCCU_ORIG INTO WA_P12DMUP_T_OCCU_ORIG.


*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_P12DMUP_T_OCCU_ORIG_STR, 
SECTN TYPE STRING,
NREMP TYPE STRING,
OCBEG TYPE STRING,
OCEND TYPE STRING,
OCCOM TYPE STRING,
WDS TYPE STRING,
CTTYP TYPE STRING,
RFMWH TYPE STRING,
WRKRS TYPE STRING,
MWHWK TYPE STRING,
REMES TYPE STRING,
EMPLP TYPE STRING,
RETIR TYPE STRING,
APTYP TYPE STRING,
MODRM TYPE STRING,
POSCD TYPE STRING,
FLYCL TYPE STRING,
10V12 TYPE STRING,
OCURF TYPE STRING,
OCDJS TYPE STRING,
OCVNU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P12DMUP_T_OCCU_ORIG_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_P12DMUP_T_OCCU_ORIG_STR-SECTN sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-NREMP sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-OCBEG sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-OCEND sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-OCCOM sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-WDS sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-CTTYP sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-RFMWH sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-WRKRS sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-MWHWK sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-REMES sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-EMPLP sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-RETIR sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-APTYP sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-MODRM sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-POSCD sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-FLYCL sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-10V12 sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-OCURF sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-OCDJS sy-vline 
WA_P12DMUP_T_OCCU_ORIG_STR-OCVNU sy-vline      INTO ld_text SEPARATED BY SPACE.

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