ABAP Select data from SAP table HRWB_REQUISITION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRWB_REQUISITION
*  INTO TABLE @DATA(IT_HRWB_REQUISITION2).
*--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_HRWB_REQUISITION INDEX 1 INTO DATA(WA_HRWB_REQUISITION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRWB_REQUISITION>-REQUISITIONID = 1.
<HRWB_REQUISITION>-REQUISITIONNAME = 1.
<HRWB_REQUISITION>-TRANSACTION = 1.
<HRWB_REQUISITION>-SOURCE = 1.
<HRWB_REQUISITION>-DESTINATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRWB_REQUISITION-JOBNUMBER, sy-vline,
  WA_HRWB_REQUISITION-JOBNAME, sy-vline,
  WA_HRWB_REQUISITION-VALIDFROM, sy-vline,
  WA_HRWB_REQUISITION-VALIDTO, sy-vline,
  WA_HRWB_REQUISITION-PERSONNELAREA, sy-vline,
  WA_HRWB_REQUISITION-PERSONNELSUBAREA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRWB_REQUISITION 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_HRWB_REQUISITION 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_HRWB_REQUISITION INTO WA_HRWB_REQUISITION.


*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_HRWB_REQUISITION_STR, 
REQUISITIONID TYPE STRING,
REQUISITIONNAME TYPE STRING,
TRANSACTION TYPE STRING,
SOURCE TYPE STRING,
DESTINATION TYPE STRING,
JOBNUMBER TYPE STRING,
JOBNAME TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
PERSONNELAREA TYPE STRING,
PERSONNELSUBAREA TYPE STRING,
PERSONNELOFFICER TYPE STRING,
LINEMANAGER TYPE STRING,
BUSINESSAREA TYPE STRING,
JOBCOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRWB_REQUISITION_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_HRWB_REQUISITION_STR-REQUISITIONID sy-vline 
WA_HRWB_REQUISITION_STR-REQUISITIONNAME sy-vline 
WA_HRWB_REQUISITION_STR-TRANSACTION sy-vline 
WA_HRWB_REQUISITION_STR-SOURCE sy-vline 
WA_HRWB_REQUISITION_STR-DESTINATION sy-vline 
WA_HRWB_REQUISITION_STR-JOBNUMBER sy-vline 
WA_HRWB_REQUISITION_STR-JOBNAME sy-vline 
WA_HRWB_REQUISITION_STR-VALIDFROM sy-vline 
WA_HRWB_REQUISITION_STR-VALIDTO sy-vline 
WA_HRWB_REQUISITION_STR-PERSONNELAREA sy-vline 
WA_HRWB_REQUISITION_STR-PERSONNELSUBAREA sy-vline 
WA_HRWB_REQUISITION_STR-PERSONNELOFFICER sy-vline 
WA_HRWB_REQUISITION_STR-LINEMANAGER sy-vline 
WA_HRWB_REQUISITION_STR-BUSINESSAREA sy-vline 
WA_HRWB_REQUISITION_STR-JOBCOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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