ABAP Select data from SAP table HRPAYCH_S_PYF_PLOG_ALV_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRPAYCH_S_PYF_PLOG_ALV_HEADER
*  INTO TABLE @DATA(IT_HRPAYCH_S_PYF_PLOG_ALV_HEADER2).
*--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_HRPAYCH_S_PYF_PLOG_ALV_HEADER INDEX 1 INTO DATA(WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRPAYCH_S_PYF_PLOG_ALV_HEADER>-PLOG_VARI = 1.
<HRPAYCH_S_PYF_PLOG_ALV_HEADER>-RR_TYPE = 1.
<HRPAYCH_S_PYF_PLOG_ALV_HEADER>-FUNCO = 1.
<HRPAYCH_S_PYF_PLOG_ALV_HEADER>-FNUMB = 1.
<HRPAYCH_S_PYF_PLOG_ALV_HEADER>-PARM1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-PARM2, sy-vline,
  WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-PARM3, sy-vline,
  WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-PARM4, sy-vline,
  WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-PROTO, sy-vline,
  WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-SKIP, sy-vline,
  WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-PCAL_AS_SCDES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER 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_HRPAYCH_S_PYF_PLOG_ALV_HEADER 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_HRPAYCH_S_PYF_PLOG_ALV_HEADER INTO WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER.


*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 AHVN2, internal->external for field SVNR
CALL FUNCTION 'CONVERSION_EXIT_AHVN2_OUTPUT'
  EXPORTING
    input =                      WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-SVNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-SVNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PIDEX, internal->external for field PERSONID_EXT
CALL FUNCTION 'CONVERSION_EXIT_PIDEX_OUTPUT'
  EXPORTING
    input =                      WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-PERSONID_EXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER-PERSONID_EXT.
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_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR, 
PLOG_VARI TYPE STRING,
RR_TYPE TYPE STRING,
FUNCO TYPE STRING,
FNUMB TYPE STRING,
PARM1 TYPE STRING,
PARM2 TYPE STRING,
PARM3 TYPE STRING,
PARM4 TYPE STRING,
PROTO TYPE STRING,
SKIP TYPE STRING,
PCAL_AS_SCDES TYPE STRING,
PLOG_FU_P1_DES TYPE STRING,
PCAL_ASNUM TYPE STRING,
PCAL_ASNEXTE TYPE STRING,
LINE_NO TYPE STRING,
SVNR TYPE STRING,
PERSONID_EXT TYPE STRING,
PERNR TYPE STRING,
LINE_COUNT TYPE STRING,
FILT_VAL TYPE STRING,
PLOG_GRP_N_01 TYPE STRING,
TABSRC TYPE STRING,
TABID TYPE STRING,
RECHZ TYPE STRING,
INPOUT TYPE STRING,
MEP TYPE STRING,
PLOG_GRP_C_01 TYPE STRING,
PLOG_GRP_C_02 TYPE STRING,
PLOG_GRP_C_03 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_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_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PLOG_VARI sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-RR_TYPE sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-FUNCO sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-FNUMB sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PARM1 sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PARM2 sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PARM3 sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PARM4 sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PROTO sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-SKIP sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PCAL_AS_SCDES sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PLOG_FU_P1_DES sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PCAL_ASNUM sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PCAL_ASNEXTE sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-LINE_NO sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-SVNR sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PERSONID_EXT sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PERNR sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-LINE_COUNT sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-FILT_VAL sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PLOG_GRP_N_01 sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-TABSRC sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-TABID sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-RECHZ sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-INPOUT sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-MEP sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PLOG_GRP_C_01 sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PLOG_GRP_C_02 sy-vline 
WA_HRPAYCH_S_PYF_PLOG_ALV_HEADER_STR-PLOG_GRP_C_03 sy-vline      INTO ld_text SEPARATED BY SPACE.

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