ABAP Select data from SAP table WDHC_CONFIG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WDHC_CONFIG
*  INTO TABLE @DATA(IT_WDHC_CONFIG2).
*--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_WDHC_CONFIG INDEX 1 INTO DATA(WA_WDHC_CONFIG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WDHC_CONFIG>-MANDT = 1.
<WDHC_CONFIG>-ACTIVE = 1.
<WDHC_CONFIG>-APPHELP_ACTIVE = 1.
<WDHC_CONFIG>-PATH = 1.
<WDHC_CONFIG>-LANG_DEPENDENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WDHC_CONFIG-POS1, sy-vline,
  WA_WDHC_CONFIG-POS2, sy-vline,
  WA_WDHC_CONFIG-POS3, sy-vline,
  WA_WDHC_CONFIG-POS4, sy-vline,
  WA_WDHC_CONFIG-POS5, sy-vline,
  WA_WDHC_CONFIG-POS6, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WDHC_CONFIG 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_WDHC_CONFIG 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_WDHC_CONFIG INTO WA_WDHC_CONFIG.


*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_WDHC_CONFIG_STR, 
MANDT TYPE STRING,
ACTIVE TYPE STRING,
APPHELP_ACTIVE TYPE STRING,
PATH TYPE STRING,
LANG_DEPENDENT TYPE STRING,
POS1 TYPE STRING,
POS2 TYPE STRING,
POS3 TYPE STRING,
POS4 TYPE STRING,
POS5 TYPE STRING,
POS6 TYPE STRING,
NOTES TYPE STRING,
FAQS TYPE STRING,
LINKS TYPE STRING,
LEARN_MATERIAL TYPE STRING,
SEARCH TYPE STRING,
SOLMAN_ACTIVE TYPE STRING,
USE_SIDEPANEL TYPE STRING,
USE_PORTAL_IVIEW TYPE STRING,
LOG_PATH TYPE STRING,
KW_PATH TYPE STRING,
KW_LOG_PATH TYPE STRING,
MAX_RESULTS TYPE STRING,
KW_TYPE TYPE STRING,
KW_HTTP TYPE STRING,
ECM_ACTIVE TYPE STRING,
EC_LIMIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WDHC_CONFIG_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_WDHC_CONFIG_STR-MANDT sy-vline 
WA_WDHC_CONFIG_STR-ACTIVE sy-vline 
WA_WDHC_CONFIG_STR-APPHELP_ACTIVE sy-vline 
WA_WDHC_CONFIG_STR-PATH sy-vline 
WA_WDHC_CONFIG_STR-LANG_DEPENDENT sy-vline 
WA_WDHC_CONFIG_STR-POS1 sy-vline 
WA_WDHC_CONFIG_STR-POS2 sy-vline 
WA_WDHC_CONFIG_STR-POS3 sy-vline 
WA_WDHC_CONFIG_STR-POS4 sy-vline 
WA_WDHC_CONFIG_STR-POS5 sy-vline 
WA_WDHC_CONFIG_STR-POS6 sy-vline 
WA_WDHC_CONFIG_STR-NOTES sy-vline 
WA_WDHC_CONFIG_STR-FAQS sy-vline 
WA_WDHC_CONFIG_STR-LINKS sy-vline 
WA_WDHC_CONFIG_STR-LEARN_MATERIAL sy-vline 
WA_WDHC_CONFIG_STR-SEARCH sy-vline 
WA_WDHC_CONFIG_STR-SOLMAN_ACTIVE sy-vline 
WA_WDHC_CONFIG_STR-USE_SIDEPANEL sy-vline 
WA_WDHC_CONFIG_STR-USE_PORTAL_IVIEW sy-vline 
WA_WDHC_CONFIG_STR-LOG_PATH sy-vline 
WA_WDHC_CONFIG_STR-KW_PATH sy-vline 
WA_WDHC_CONFIG_STR-KW_LOG_PATH sy-vline 
WA_WDHC_CONFIG_STR-MAX_RESULTS sy-vline 
WA_WDHC_CONFIG_STR-KW_TYPE sy-vline 
WA_WDHC_CONFIG_STR-KW_HTTP sy-vline 
WA_WDHC_CONFIG_STR-ECM_ACTIVE sy-vline 
WA_WDHC_CONFIG_STR-EC_LIMIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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