ABAP Select data from SAP table DOCR_RELAY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DOCR_RELAY
*  INTO TABLE @DATA(IT_DOCR_RELAY2).
*--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_DOCR_RELAY INDEX 1 INTO DATA(WA_DOCR_RELAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DOCR_RELAY>-RELAY_ID = 1.
<DOCR_RELAY>-RELAY_LABEL = 1.
<DOCR_RELAY>-RELAY_KIND = 1.
<DOCR_RELAY>-ACTIVE = 1.
<DOCR_RELAY>-CFG_CON_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DOCR_RELAY-CFG_CM_DISTRIBUTION, sy-vline,
  WA_DOCR_RELAY-CONTENT_ID, sy-vline,
  WA_DOCR_RELAY-CONTENT_RELEASE, sy-vline,
  WA_DOCR_RELAY-CONTENT_VERSION, sy-vline,
  WA_DOCR_RELAY-CONTENT_STATUS, sy-vline,
  WA_DOCR_RELAY-CONTENT_STEP_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DOCR_RELAY 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_DOCR_RELAY 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_DOCR_RELAY INTO WA_DOCR_RELAY.


*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_DOCR_RELAY_STR, 
RELAY_ID TYPE STRING,
RELAY_LABEL TYPE STRING,
RELAY_KIND TYPE STRING,
ACTIVE TYPE STRING,
CFG_CON_ID TYPE STRING,
CFG_CM_DISTRIBUTION TYPE STRING,
CONTENT_ID TYPE STRING,
CONTENT_RELEASE TYPE STRING,
CONTENT_VERSION TYPE STRING,
CONTENT_STATUS TYPE STRING,
CONTENT_STEP_NAME TYPE STRING,
CONTENT_OFFSET TYPE STRING,
CONTENT_BUILD_TIMESTAMP TYPE STRING,
CONTENT_AUTO_UPDATE TYPE STRING,
CHANGED_AT TYPE STRING,
CHANGED_BY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DOCR_RELAY_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_DOCR_RELAY_STR-RELAY_ID sy-vline 
WA_DOCR_RELAY_STR-RELAY_LABEL sy-vline 
WA_DOCR_RELAY_STR-RELAY_KIND sy-vline 
WA_DOCR_RELAY_STR-ACTIVE sy-vline 
WA_DOCR_RELAY_STR-CFG_CON_ID sy-vline 
WA_DOCR_RELAY_STR-CFG_CM_DISTRIBUTION sy-vline 
WA_DOCR_RELAY_STR-CONTENT_ID sy-vline 
WA_DOCR_RELAY_STR-CONTENT_RELEASE sy-vline 
WA_DOCR_RELAY_STR-CONTENT_VERSION sy-vline 
WA_DOCR_RELAY_STR-CONTENT_STATUS sy-vline 
WA_DOCR_RELAY_STR-CONTENT_STEP_NAME sy-vline 
WA_DOCR_RELAY_STR-CONTENT_OFFSET sy-vline 
WA_DOCR_RELAY_STR-CONTENT_BUILD_TIMESTAMP sy-vline 
WA_DOCR_RELAY_STR-CONTENT_AUTO_UPDATE sy-vline 
WA_DOCR_RELAY_STR-CHANGED_AT sy-vline 
WA_DOCR_RELAY_STR-CHANGED_BY sy-vline      INTO ld_text SEPARATED BY SPACE.

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