ABAP Select data from SAP table ESH_S_IF_DCB_FIELD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_S_IF_DCB_FIELD
*  INTO TABLE @DATA(IT_ESH_S_IF_DCB_FIELD2).
*--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_ESH_S_IF_DCB_FIELD INDEX 1 INTO DATA(WA_ESH_S_IF_DCB_FIELD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_S_IF_DCB_FIELD>-NODE_TYPE_ID = 1.
<ESH_S_IF_DCB_FIELD>-FIELD_ID = 1.
<ESH_S_IF_DCB_FIELD>-POSI = 1.
<ESH_S_IF_DCB_FIELD>-PRIMARY_KEY = 1.
<ESH_S_IF_DCB_FIELD>-SEARCHABLE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_S_IF_DCB_FIELD-SELECT_OPTION, sy-vline,
  WA_ESH_S_IF_DCB_FIELD-LANGUAGE, sy-vline,
  WA_ESH_S_IF_DCB_FIELD-MULTI_VALUE, sy-vline,
  WA_ESH_S_IF_DCB_FIELD-TEXT_SEARCH, sy-vline,
  WA_ESH_S_IF_DCB_FIELD-INTERACTIVE_NAV, sy-vline,
  WA_ESH_S_IF_DCB_FIELD-FIELD_SEMANTICS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_S_IF_DCB_FIELD 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_ESH_S_IF_DCB_FIELD 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_ESH_S_IF_DCB_FIELD INTO WA_ESH_S_IF_DCB_FIELD.


*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_ESH_S_IF_DCB_FIELD_STR, 
NODE_TYPE_ID TYPE STRING,
FIELD_ID TYPE STRING,
POSI TYPE STRING,
PRIMARY_KEY TYPE STRING,
SEARCHABLE TYPE STRING,
SELECT_OPTION TYPE STRING,
LANGUAGE TYPE STRING,
MULTI_VALUE TYPE STRING,
TEXT_SEARCH TYPE STRING,
INTERACTIVE_NAV TYPE STRING,
FIELD_SEMANTICS TYPE STRING,
DATA_ELEMENT_ID TYPE STRING,
SELECTION TYPE STRING,
SELECTION_OBL TYPE STRING,
SELECTION_ONLY TYPE STRING,
SELECTION_OPT TYPE STRING,
NO_EXTRACTION TYPE STRING,
BACKEND_NAME TYPE STRING,
SWITCHES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_S_IF_DCB_FIELD_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_ESH_S_IF_DCB_FIELD_STR-NODE_TYPE_ID sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-FIELD_ID sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-POSI sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-PRIMARY_KEY sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-SEARCHABLE sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-SELECT_OPTION sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-LANGUAGE sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-MULTI_VALUE sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-TEXT_SEARCH sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-INTERACTIVE_NAV sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-FIELD_SEMANTICS sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-DATA_ELEMENT_ID sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-SELECTION sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-SELECTION_OBL sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-SELECTION_ONLY sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-SELECTION_OPT sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-NO_EXTRACTION sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-BACKEND_NAME sy-vline 
WA_ESH_S_IF_DCB_FIELD_STR-SWITCHES sy-vline      INTO ld_text SEPARATED BY SPACE.

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