ABAP Select data from SAP table ESH_L_RESOURCES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ESH_L_RESOURCES 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_L_RESOURCES. 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_L_RESOURCES 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_L_RESOURCES TYPE STANDARD TABLE OF ESH_L_RESOURCES,
      WA_ESH_L_RESOURCES TYPE ESH_L_RESOURCES,
      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_L_RESOURCES> TYPE ESH_L_RESOURCES.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_L_RESOURCES
*  INTO TABLE @DATA(IT_ESH_L_RESOURCES2).
*--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_L_RESOURCES INDEX 1 INTO DATA(WA_ESH_L_RESOURCES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_L_RESOURCES>-MANDT = 1.
<ESH_L_RESOURCES>-WORKCENTERINTERNALID = 1.
<ESH_L_RESOURCES>-WORKCENTERTYPECODE = 1.
<ESH_L_RESOURCES>-CONTROLLINGAREA = 1.
<ESH_L_RESOURCES>-CONTROLLINGAREANAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_L_RESOURCES-COSTCENTER, sy-vline,
  WA_ESH_L_RESOURCES-COSTCENTERNAME, sy-vline,
  WA_ESH_L_RESOURCES-PLANT, sy-vline,
  WA_ESH_L_RESOURCES-PLANTNAME, sy-vline,
  WA_ESH_L_RESOURCES-PRODUCTIONRESOURCETYPENAME, sy-vline,
  WA_ESH_L_RESOURCES-VALIDITYENDDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_L_RESOURCES 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_L_RESOURCES 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_L_RESOURCES INTO WA_ESH_L_RESOURCES.


*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 COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_RESOURCES-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_RESOURCES-COSTCENTER.
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_ESH_L_RESOURCES_STR, 
MANDT TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
CONTROLLINGAREA TYPE STRING,
CONTROLLINGAREANAME TYPE STRING,
COSTCENTER TYPE STRING,
COSTCENTERNAME TYPE STRING,
PLANT TYPE STRING,
PLANTNAME TYPE STRING,
PRODUCTIONRESOURCETYPENAME TYPE STRING,
VALIDITYENDDATE TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
WORKCENTER TYPE STRING,
WORKCENTERCATEGORYCODE TYPE STRING,
WORKCENTERCATEGORYNAME TYPE STRING,
WORKCENTERISTOBEDELETED TYPE STRING,
WORKCENTERLOCATION TYPE STRING,
WORKCENTERLOCATIONNAME TYPE STRING,
WORKCENTERRESPONSIBLE TYPE STRING,
WORKCENTERRESPONSIBLENAME TYPE STRING,
WORKCENTERTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_L_RESOURCES_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_L_RESOURCES_STR-MANDT sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERINTERNALID sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERTYPECODE sy-vline 
WA_ESH_L_RESOURCES_STR-CONTROLLINGAREA sy-vline 
WA_ESH_L_RESOURCES_STR-CONTROLLINGAREANAME sy-vline 
WA_ESH_L_RESOURCES_STR-COSTCENTER sy-vline 
WA_ESH_L_RESOURCES_STR-COSTCENTERNAME sy-vline 
WA_ESH_L_RESOURCES_STR-PLANT sy-vline 
WA_ESH_L_RESOURCES_STR-PLANTNAME sy-vline 
WA_ESH_L_RESOURCES_STR-PRODUCTIONRESOURCETYPENAME sy-vline 
WA_ESH_L_RESOURCES_STR-VALIDITYENDDATE sy-vline 
WA_ESH_L_RESOURCES_STR-VALIDITYSTARTDATE sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTER sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERCATEGORYCODE sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERCATEGORYNAME sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERISTOBEDELETED sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERLOCATION sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERLOCATIONNAME sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERRESPONSIBLE sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERRESPONSIBLENAME sy-vline 
WA_ESH_L_RESOURCES_STR-WORKCENTERTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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