ABAP Select data from SAP table RESTY_TAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RESTY_TAB
*  INTO TABLE @DATA(IT_RESTY_TAB2).
*--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_RESTY_TAB INDEX 1 INTO DATA(WA_RESTY_TAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RESTY_TAB>-PLVAR = 1.
<RESTY_TAB>-OTYPE = 1.
<RESTY_TAB>-OBJID = 1.
<RESTY_TAB>-ISTAT = 1.
<RESTY_TAB>-SHORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RESTY_TAB-STEXT, sy-vline,
  WA_RESTY_TAB-PRIOX, sy-vline,
  WA_RESTY_TAB-KRIT, sy-vline,
  WA_RESTY_TAB-KNAPP, sy-vline,
  WA_RESTY_TAB-ORTAB, sy-vline,
  WA_RESTY_TAB-PRIOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RESTY_TAB 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_RESTY_TAB 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_RESTY_TAB INTO WA_RESTY_TAB.


*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_RESTY_TAB_STR, 
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
ISTAT TYPE STRING,
SHORT TYPE STRING,
STEXT TYPE STRING,
PRIOX TYPE STRING,
KRIT TYPE STRING,
KNAPP TYPE STRING,
ORTAB TYPE STRING,
PRIOR TYPE STRING,
DISPO TYPE STRING,
MANZL TYPE STRING,
PUNIT TYPE STRING,
XTYPE TYPE STRING,
RSIGN TYPE STRING,
RELAT TYPE STRING,
SCLAS TYPE STRING,
PROG TYPE STRING,
KAPZ1 TYPE STRING,
KAPZ2 TYPE STRING,
KAPZ3 TYPE STRING,
RNEED TYPE STRING,
RAUMX TYPE STRING,
CONT TYPE STRING,
INDEX TYPE STRING,
COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RESTY_TAB_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_RESTY_TAB_STR-PLVAR sy-vline 
WA_RESTY_TAB_STR-OTYPE sy-vline 
WA_RESTY_TAB_STR-OBJID sy-vline 
WA_RESTY_TAB_STR-ISTAT sy-vline 
WA_RESTY_TAB_STR-SHORT sy-vline 
WA_RESTY_TAB_STR-STEXT sy-vline 
WA_RESTY_TAB_STR-PRIOX sy-vline 
WA_RESTY_TAB_STR-KRIT sy-vline 
WA_RESTY_TAB_STR-KNAPP sy-vline 
WA_RESTY_TAB_STR-ORTAB sy-vline 
WA_RESTY_TAB_STR-PRIOR sy-vline 
WA_RESTY_TAB_STR-DISPO sy-vline 
WA_RESTY_TAB_STR-MANZL sy-vline 
WA_RESTY_TAB_STR-PUNIT sy-vline 
WA_RESTY_TAB_STR-XTYPE sy-vline 
WA_RESTY_TAB_STR-RSIGN sy-vline 
WA_RESTY_TAB_STR-RELAT sy-vline 
WA_RESTY_TAB_STR-SCLAS sy-vline 
WA_RESTY_TAB_STR-PROG sy-vline 
WA_RESTY_TAB_STR-KAPZ1 sy-vline 
WA_RESTY_TAB_STR-KAPZ2 sy-vline 
WA_RESTY_TAB_STR-KAPZ3 sy-vline 
WA_RESTY_TAB_STR-RNEED sy-vline 
WA_RESTY_TAB_STR-RAUMX sy-vline 
WA_RESTY_TAB_STR-CONT sy-vline 
WA_RESTY_TAB_STR-INDEX sy-vline 
WA_RESTY_TAB_STR-COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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