ABAP Select data from SAP table HRP1820 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HRP1820 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 HRP1820. 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 HRP1820 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_HRP1820 TYPE STANDARD TABLE OF HRP1820,
      WA_HRP1820 TYPE HRP1820,
      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: <HRP1820> TYPE HRP1820.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HRP1820.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HRP1820
  INTO TABLE IT_HRP1820.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRP1820
*  INTO TABLE @DATA(IT_HRP18202).
*--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_HRP1820 INDEX 1 INTO DATA(WA_HRP18202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HRP1820 ASSIGNING <HRP1820>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRP1820>-MANDT = 1.
<HRP1820>-PLVAR = 1.
<HRP1820>-OTYPE = 1.
<HRP1820>-OBJID = 1.
<HRP1820>-SUBTY = 1.

ENDLOOP.

LOOP AT IT_HRP1820 INTO WA_HRP1820.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRP1820-ISTAT, sy-vline,
  WA_HRP1820-BEGDA, sy-vline,
  WA_HRP1820-ENDDA, sy-vline,
  WA_HRP1820-LANGU, sy-vline,
  WA_HRP1820-FILLER, sy-vline,
  WA_HRP1820-SEQNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRP1820 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_HRP1820 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_HRP1820 INTO WA_HRP1820.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_HRP1820-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRP1820-LANGU.
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_HRP1820_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
LANGU TYPE STRING,
FILLER TYPE STRING,
SEQNR TYPE STRING,
INFTY TYPE STRING,
OTJID TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
REASN TYPE STRING,
HISTO TYPE STRING,
ITXNR TYPE STRING,
SC_SIG_TF TYPE STRING,
SC_SIG_Y TYPE STRING,
SC_SIG TYPE STRING,
SC_FLAG TYPE STRING,
TABNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRP1820_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_HRP1820_STR-MANDT sy-vline 
WA_HRP1820_STR-PLVAR sy-vline 
WA_HRP1820_STR-OTYPE sy-vline 
WA_HRP1820_STR-OBJID sy-vline 
WA_HRP1820_STR-SUBTY sy-vline 
WA_HRP1820_STR-ISTAT sy-vline 
WA_HRP1820_STR-BEGDA sy-vline 
WA_HRP1820_STR-ENDDA sy-vline 
WA_HRP1820_STR-LANGU sy-vline 
WA_HRP1820_STR-FILLER sy-vline 
WA_HRP1820_STR-SEQNR sy-vline 
WA_HRP1820_STR-INFTY sy-vline 
WA_HRP1820_STR-OTJID sy-vline 
WA_HRP1820_STR-AEDTM sy-vline 
WA_HRP1820_STR-UNAME sy-vline 
WA_HRP1820_STR-REASN sy-vline 
WA_HRP1820_STR-HISTO sy-vline 
WA_HRP1820_STR-ITXNR sy-vline 
WA_HRP1820_STR-SC_SIG_TF sy-vline 
WA_HRP1820_STR-SC_SIG_Y sy-vline 
WA_HRP1820_STR-SC_SIG sy-vline 
WA_HRP1820_STR-SC_FLAG sy-vline 
WA_HRP1820_STR-TABNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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