ABAP Select data from SAP table TWISPS_NOALLOC1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TWISPS_NOALLOC1 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 TWISPS_NOALLOC1. 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 TWISPS_NOALLOC1 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_TWISPS_NOALLOC1 TYPE STANDARD TABLE OF TWISPS_NOALLOC1,
      WA_TWISPS_NOALLOC1 TYPE TWISPS_NOALLOC1,
      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: <TWISPS_NOALLOC1> TYPE TWISPS_NOALLOC1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TWISPS_NOALLOC1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TWISPS_NOALLOC1
  INTO TABLE IT_TWISPS_NOALLOC1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TWISPS_NOALLOC1
*  INTO TABLE @DATA(IT_TWISPS_NOALLOC12).
*--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_TWISPS_NOALLOC1 INDEX 1 INTO DATA(WA_TWISPS_NOALLOC12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TWISPS_NOALLOC1 ASSIGNING <TWISPS_NOALLOC1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TWISPS_NOALLOC1>-MANDT = 1.
<TWISPS_NOALLOC1>-ABELN = 1.
<TWISPS_NOALLOC1>-BEZCH = 1.
<TWISPS_NOALLOC1>-AUFAR = 1.
<TWISPS_NOALLOC1>-EKORG = 1.

ENDLOOP.

LOOP AT IT_TWISPS_NOALLOC1 INTO WA_TWISPS_NOALLOC1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TWISPS_NOALLOC1-EKGRP, sy-vline,
  WA_TWISPS_NOALLOC1-PLSZN, sy-vline,
  WA_TWISPS_NOALLOC1-PLSCH, sy-vline,
  WA_TWISPS_NOALLOC1-PLINT, sy-vline,
  WA_TWISPS_NOALLOC1-CREUSR, sy-vline,
  WA_TWISPS_NOALLOC1-CREDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TWISPS_NOALLOC1 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_TWISPS_NOALLOC1 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_TWISPS_NOALLOC1 INTO WA_TWISPS_NOALLOC1.


*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 ABELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TWISPS_NOALLOC1-ABELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TWISPS_NOALLOC1-ABELN.
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_TWISPS_NOALLOC1_STR, 
MANDT TYPE STRING,
ABELN TYPE STRING,
BEZCH TYPE STRING,
AUFAR TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
PLSZN TYPE STRING,
PLSCH TYPE STRING,
PLINT TYPE STRING,
CREUSR TYPE STRING,
CREDAT TYPE STRING,
CREUZT TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TWISPS_NOALLOC1_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_TWISPS_NOALLOC1_STR-MANDT sy-vline 
WA_TWISPS_NOALLOC1_STR-ABELN sy-vline 
WA_TWISPS_NOALLOC1_STR-BEZCH sy-vline 
WA_TWISPS_NOALLOC1_STR-AUFAR sy-vline 
WA_TWISPS_NOALLOC1_STR-EKORG sy-vline 
WA_TWISPS_NOALLOC1_STR-EKGRP sy-vline 
WA_TWISPS_NOALLOC1_STR-PLSZN sy-vline 
WA_TWISPS_NOALLOC1_STR-PLSCH sy-vline 
WA_TWISPS_NOALLOC1_STR-PLINT sy-vline 
WA_TWISPS_NOALLOC1_STR-CREUSR sy-vline 
WA_TWISPS_NOALLOC1_STR-CREDAT sy-vline 
WA_TWISPS_NOALLOC1_STR-CREUZT sy-vline 
WA_TWISPS_NOALLOC1_STR-STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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