ABAP Select data from SAP table HAP_S_COLUMN_NAME into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HAP_S_COLUMN_NAME
*  INTO TABLE @DATA(IT_HAP_S_COLUMN_NAME2).
*--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_HAP_S_COLUMN_NAME INDEX 1 INTO DATA(WA_HAP_S_COLUMN_NAME2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HAP_S_COLUMN_NAME>-COL_IID_01 = 1.
<HAP_S_COLUMN_NAME>-NAME_01 = 1.
<HAP_S_COLUMN_NAME>-COL_IID_02 = 1.
<HAP_S_COLUMN_NAME>-NAME_02 = 1.
<HAP_S_COLUMN_NAME>-COL_IID_03 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HAP_S_COLUMN_NAME-NAME_03, sy-vline,
  WA_HAP_S_COLUMN_NAME-COL_IID_04, sy-vline,
  WA_HAP_S_COLUMN_NAME-NAME_04, sy-vline,
  WA_HAP_S_COLUMN_NAME-COL_IID_05, sy-vline,
  WA_HAP_S_COLUMN_NAME-NAME_05, sy-vline,
  WA_HAP_S_COLUMN_NAME-COL_IID_06, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HAP_S_COLUMN_NAME 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_HAP_S_COLUMN_NAME 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_HAP_S_COLUMN_NAME INTO WA_HAP_S_COLUMN_NAME.


*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_HAP_S_COLUMN_NAME_STR, 
COL_IID_01 TYPE STRING,
NAME_01 TYPE STRING,
COL_IID_02 TYPE STRING,
NAME_02 TYPE STRING,
COL_IID_03 TYPE STRING,
NAME_03 TYPE STRING,
COL_IID_04 TYPE STRING,
NAME_04 TYPE STRING,
COL_IID_05 TYPE STRING,
NAME_05 TYPE STRING,
COL_IID_06 TYPE STRING,
NAME_06 TYPE STRING,
COL_IID_07 TYPE STRING,
NAME_07 TYPE STRING,
COL_IID_08 TYPE STRING,
NAME_08 TYPE STRING,
COL_IID_09 TYPE STRING,
NAME_09 TYPE STRING,
COL_IID_10 TYPE STRING,
NAME_10 TYPE STRING,
COL_IID_11 TYPE STRING,
NAME_11 TYPE STRING,
COL_IID_12 TYPE STRING,
NAME_12 TYPE STRING,
COL_IID_13 TYPE STRING,
NAME_13 TYPE STRING,
COL_IID_14 TYPE STRING,
NAME_14 TYPE STRING,
COL_IID_15 TYPE STRING,
NAME_15 TYPE STRING,
COL_IID_16 TYPE STRING,
NAME_16 TYPE STRING,
COL_IID_17 TYPE STRING,
NAME_17 TYPE STRING,
COL_IID_18 TYPE STRING,
NAME_18 TYPE STRING,
COL_IID_19 TYPE STRING,
NAME_19 TYPE STRING,
COL_IID_20 TYPE STRING,
NAME_20 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HAP_S_COLUMN_NAME_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_HAP_S_COLUMN_NAME_STR-COL_IID_01 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_01 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_02 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_02 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_03 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_03 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_04 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_04 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_05 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_05 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_06 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_06 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_07 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_07 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_08 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_08 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_09 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_09 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_10 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_10 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_11 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_11 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_12 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_12 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_13 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_13 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_14 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_14 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_15 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_15 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_16 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_16 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_17 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_17 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_18 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_18 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_19 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_19 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-COL_IID_20 sy-vline 
WA_HAP_S_COLUMN_NAME_STR-NAME_20 sy-vline      INTO ld_text SEPARATED BY SPACE.

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