ABAP Select data from SAP table IESCHEDLDRDNGRRC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IESCHEDLDRDNGRRC
*  INTO TABLE @DATA(IT_IESCHEDLDRDNGRRC2).
*--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_IESCHEDLDRDNGRRC INDEX 1 INTO DATA(WA_IESCHEDLDRDNGRRC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IESCHEDLDRDNGRRC>-MANDT = 1.
<IESCHEDLDRDNGRRC>-UTILITIESINSTALLATION = 1.
<IESCHEDLDRDNGRRC>-UTILITIESLOGICALREGISTERNUMBER = 1.
<IESCHEDLDRDNGRRC>-SCHEDULEDMETERREADINGDATE = 1.
<IESCHEDLDRDNGRRC>-EQUIPMENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IESCHEDLDRDNGRRC-UTILITIESREGISTER, sy-vline,
  WA_IESCHEDLDRDNGRRC-UTILITIESDIVISIONCATEGORY, sy-vline,
  WA_IESCHEDLDRDNGRRC-UTILITIESREGISTERTYPE, sy-vline,
  WA_IESCHEDLDRDNGRRC-UTILITIESREGISTERCATEGORY, sy-vline,
  WA_IESCHEDLDRDNGRRC-METERREADINGUNIT, sy-vline,
  WA_IESCHEDLDRDNGRRC-METERREADINGREASON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IESCHEDLDRDNGRRC 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_IESCHEDLDRDNGRRC 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_IESCHEDLDRDNGRRC INTO WA_IESCHEDLDRDNGRRC.


*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 UTILITIESINSTALLATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IESCHEDLDRDNGRRC-UTILITIESINSTALLATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IESCHEDLDRDNGRRC-UTILITIESINSTALLATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUIPMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IESCHEDLDRDNGRRC-EQUIPMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IESCHEDLDRDNGRRC-EQUIPMENT.
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_IESCHEDLDRDNGRRC_STR, 
MANDT TYPE STRING,
UTILITIESINSTALLATION TYPE STRING,
UTILITIESLOGICALREGISTERNUMBER TYPE STRING,
SCHEDULEDMETERREADINGDATE TYPE STRING,
EQUIPMENT TYPE STRING,
UTILITIESREGISTER TYPE STRING,
UTILITIESDIVISIONCATEGORY TYPE STRING,
UTILITIESREGISTERTYPE TYPE STRING,
UTILITIESREGISTERCATEGORY TYPE STRING,
METERREADINGUNIT TYPE STRING,
METERREADINGREASON TYPE STRING,
SCHEDLDMTRREADINGCATEGORY TYPE STRING,
UTILSREGISTERVALIDITYSTARTDATE TYPE STRING,
UTILSREGISTERVALIDITYENDDATE TYPE STRING,
UTILITIESPORTION TYPE STRING,
UTILSREGSCHEDLDMTRRDNGDTEID TYPE STRING,
NMBROFSCHEDLDRDNGRELEVANTREG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IESCHEDLDRDNGRRC_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_IESCHEDLDRDNGRRC_STR-MANDT sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILITIESINSTALLATION sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILITIESLOGICALREGISTERNUMBER sy-vline 
WA_IESCHEDLDRDNGRRC_STR-SCHEDULEDMETERREADINGDATE sy-vline 
WA_IESCHEDLDRDNGRRC_STR-EQUIPMENT sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILITIESREGISTER sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILITIESDIVISIONCATEGORY sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILITIESREGISTERTYPE sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILITIESREGISTERCATEGORY sy-vline 
WA_IESCHEDLDRDNGRRC_STR-METERREADINGUNIT sy-vline 
WA_IESCHEDLDRDNGRRC_STR-METERREADINGREASON sy-vline 
WA_IESCHEDLDRDNGRRC_STR-SCHEDLDMTRREADINGCATEGORY sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILSREGISTERVALIDITYSTARTDATE sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILSREGISTERVALIDITYENDDATE sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILITIESPORTION sy-vline 
WA_IESCHEDLDRDNGRRC_STR-UTILSREGSCHEDLDMTRRDNGDTEID sy-vline 
WA_IESCHEDLDRDNGRRC_STR-NMBROFSCHEDLDRDNGRELEVANTREG sy-vline      INTO ld_text SEPARATED BY SPACE.

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