ABAP Select data from SAP table HRCA_CONFIRMATIONS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRCA_CONFIRMATIONS
*  INTO TABLE @DATA(IT_HRCA_CONFIRMATIONS2).
*--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_HRCA_CONFIRMATIONS INDEX 1 INTO DATA(WA_HRCA_CONFIRMATIONS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRCA_CONFIRMATIONS>-RUECK = 1.
<HRCA_CONFIRMATIONS>-RMZHL = 1.
<HRCA_CONFIRMATIONS>-BUDAT = 1.
<HRCA_CONFIRMATIONS>-PERNR = 1.
<HRCA_CONFIRMATIONS>-AUFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRCA_CONFIRMATIONS-APLFL, sy-vline,
  WA_HRCA_CONFIRMATIONS-VORNR, sy-vline,
  WA_HRCA_CONFIRMATIONS-WERKS, sy-vline,
  WA_HRCA_CONFIRMATIONS-ARBPL, sy-vline,
  WA_HRCA_CONFIRMATIONS-STOKZ, sy-vline,
  WA_HRCA_CONFIRMATIONS-STZHL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRCA_CONFIRMATIONS 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_HRCA_CONFIRMATIONS 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_HRCA_CONFIRMATIONS INTO WA_HRCA_CONFIRMATIONS.


*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 ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HRCA_CONFIRMATIONS-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRCA_CONFIRMATIONS-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field APLFL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HRCA_CONFIRMATIONS-APLFL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRCA_CONFIRMATIONS-APLFL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_HRCA_CONFIRMATIONS-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRCA_CONFIRMATIONS-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SRCSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_HRCA_CONFIRMATIONS-SRCSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_HRCA_CONFIRMATIONS-SRCSYS.
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_HRCA_CONFIRMATIONS_STR, 
RUECK TYPE STRING,
RMZHL TYPE STRING,
BUDAT TYPE STRING,
PERNR TYPE STRING,
AUFNR TYPE STRING,
APLFL TYPE STRING,
VORNR TYPE STRING,
WERKS TYPE STRING,
ARBPL TYPE STRING,
STOKZ TYPE STRING,
STZHL TYPE STRING,
PDSNR TYPE STRING,
SRCSYS TYPE STRING,
AUFTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRCA_CONFIRMATIONS_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_HRCA_CONFIRMATIONS_STR-RUECK sy-vline 
WA_HRCA_CONFIRMATIONS_STR-RMZHL sy-vline 
WA_HRCA_CONFIRMATIONS_STR-BUDAT sy-vline 
WA_HRCA_CONFIRMATIONS_STR-PERNR sy-vline 
WA_HRCA_CONFIRMATIONS_STR-AUFNR sy-vline 
WA_HRCA_CONFIRMATIONS_STR-APLFL sy-vline 
WA_HRCA_CONFIRMATIONS_STR-VORNR sy-vline 
WA_HRCA_CONFIRMATIONS_STR-WERKS sy-vline 
WA_HRCA_CONFIRMATIONS_STR-ARBPL sy-vline 
WA_HRCA_CONFIRMATIONS_STR-STOKZ sy-vline 
WA_HRCA_CONFIRMATIONS_STR-STZHL sy-vline 
WA_HRCA_CONFIRMATIONS_STR-PDSNR sy-vline 
WA_HRCA_CONFIRMATIONS_STR-SRCSYS sy-vline 
WA_HRCA_CONFIRMATIONS_STR-AUFTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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