ABAP Select data from SAP table CLOISTPO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLOISTPO
*  INTO TABLE @DATA(IT_CLOISTPO2).
*--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_CLOISTPO INDEX 1 INTO DATA(WA_CLOISTPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLOISTPO>-MAST_KEY = 1.
<CLOISTPO>-MASA_KEY = 1.
<CLOISTPO>-STKO_KEY = 1.
<CLOISTPO>-MSGFN = 1.
<CLOISTPO>-ALPGR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLOISTPO-ALPOS, sy-vline,
  WA_CLOISTPO-ALPRF, sy-vline,
  WA_CLOISTPO-ALPST, sy-vline,
  WA_CLOISTPO-AUSCH, sy-vline,
  WA_CLOISTPO-AVOAU, sy-vline,
  WA_CLOISTPO-BEIKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLOISTPO 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_CLOISTPO 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_CLOISTPO INTO WA_CLOISTPO.


*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 MATN5, internal->external for field IDNRK
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_CLOISTPO-IDNRK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLOISTPO-IDNRK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CLOISTPO-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLOISTPO-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CLOISTPO-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLOISTPO-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CLOISTPO-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLOISTPO-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ROMEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CLOISTPO-ROMEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLOISTPO-ROMEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field IDNRK_LONG
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CLOISTPO-IDNRK_LONG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLOISTPO-IDNRK_LONG.
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_CLOISTPO_STR, 
MAST_KEY TYPE STRING,
MASA_KEY TYPE STRING,
STKO_KEY TYPE STRING,
MSGFN TYPE STRING,
ALPGR TYPE STRING,
ALPOS TYPE STRING,
ALPRF TYPE STRING,
ALPST TYPE STRING,
AUSCH TYPE STRING,
AVOAU TYPE STRING,
BEIKZ TYPE STRING,
CLASS TYPE STRING,
DATUB TYPE STRING,
DATUV TYPE STRING,
ERSKZ TYPE STRING,
EWAHR TYPE STRING,
FMENG TYPE STRING,
IDNRK TYPE STRING,
KLART TYPE STRING,
KZKUP TYPE STRING,
KZNFP TYPE STRING,
LGORT TYPE STRING,
LIFNR TYPE STRING,
LIFZT TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
NETAU TYPE STRING,
NFEAG TYPE STRING,
NFGRP TYPE STRING,
NLFZT TYPE STRING,
OBJTY TYPE STRING,
PEINH TYPE STRING,
POSNR TYPE STRING,
POSTP TYPE STRING,
POTPR TYPE STRING,
POTX1 TYPE STRING,
POTX2 TYPE STRING,
PREIS TYPE STRING,
REKRI TYPE STRING,
REKRS TYPE STRING,
RFORM TYPE STRING,
ROANZ TYPE STRING,
ROMEI TYPE STRING,
ROMEN TYPE STRING,
ROMS1 TYPE STRING,
ROMS2 TYPE STRING,
ROMS3 TYPE STRING,
SANFE TYPE STRING,
SANIN TYPE STRING,
SANKA TYPE STRING,
SANKO TYPE STRING,
SANVS TYPE STRING,
SCHGT TYPE STRING,
STKKZ TYPE STRING,
VERTI TYPE STRING,
WAERS TYPE STRING,
WEBAZ TYPE STRING,
IDNRK_LONG TYPE STRING,
XIDOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLOISTPO_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_CLOISTPO_STR-MAST_KEY sy-vline 
WA_CLOISTPO_STR-MASA_KEY sy-vline 
WA_CLOISTPO_STR-STKO_KEY sy-vline 
WA_CLOISTPO_STR-MSGFN sy-vline 
WA_CLOISTPO_STR-ALPGR sy-vline 
WA_CLOISTPO_STR-ALPOS sy-vline 
WA_CLOISTPO_STR-ALPRF sy-vline 
WA_CLOISTPO_STR-ALPST sy-vline 
WA_CLOISTPO_STR-AUSCH sy-vline 
WA_CLOISTPO_STR-AVOAU sy-vline 
WA_CLOISTPO_STR-BEIKZ sy-vline 
WA_CLOISTPO_STR-CLASS sy-vline 
WA_CLOISTPO_STR-DATUB sy-vline 
WA_CLOISTPO_STR-DATUV sy-vline 
WA_CLOISTPO_STR-ERSKZ sy-vline 
WA_CLOISTPO_STR-EWAHR sy-vline 
WA_CLOISTPO_STR-FMENG sy-vline 
WA_CLOISTPO_STR-IDNRK sy-vline 
WA_CLOISTPO_STR-KLART sy-vline 
WA_CLOISTPO_STR-KZKUP sy-vline 
WA_CLOISTPO_STR-KZNFP sy-vline 
WA_CLOISTPO_STR-LGORT sy-vline 
WA_CLOISTPO_STR-LIFNR sy-vline 
WA_CLOISTPO_STR-LIFZT sy-vline 
WA_CLOISTPO_STR-MEINS sy-vline 
WA_CLOISTPO_STR-MENGE sy-vline 
WA_CLOISTPO_STR-NETAU sy-vline 
WA_CLOISTPO_STR-NFEAG sy-vline 
WA_CLOISTPO_STR-NFGRP sy-vline 
WA_CLOISTPO_STR-NLFZT sy-vline 
WA_CLOISTPO_STR-OBJTY sy-vline 
WA_CLOISTPO_STR-PEINH sy-vline 
WA_CLOISTPO_STR-POSNR sy-vline 
WA_CLOISTPO_STR-POSTP sy-vline 
WA_CLOISTPO_STR-POTPR sy-vline 
WA_CLOISTPO_STR-POTX1 sy-vline 
WA_CLOISTPO_STR-POTX2 sy-vline 
WA_CLOISTPO_STR-PREIS sy-vline 
WA_CLOISTPO_STR-REKRI sy-vline 
WA_CLOISTPO_STR-REKRS sy-vline 
WA_CLOISTPO_STR-RFORM sy-vline 
WA_CLOISTPO_STR-ROANZ sy-vline 
WA_CLOISTPO_STR-ROMEI sy-vline 
WA_CLOISTPO_STR-ROMEN sy-vline 
WA_CLOISTPO_STR-ROMS1 sy-vline 
WA_CLOISTPO_STR-ROMS2 sy-vline 
WA_CLOISTPO_STR-ROMS3 sy-vline 
WA_CLOISTPO_STR-SANFE sy-vline 
WA_CLOISTPO_STR-SANIN sy-vline 
WA_CLOISTPO_STR-SANKA sy-vline 
WA_CLOISTPO_STR-SANKO sy-vline 
WA_CLOISTPO_STR-SANVS sy-vline 
WA_CLOISTPO_STR-SCHGT sy-vline 
WA_CLOISTPO_STR-STKKZ sy-vline 
WA_CLOISTPO_STR-VERTI sy-vline 
WA_CLOISTPO_STR-WAERS sy-vline 
WA_CLOISTPO_STR-WEBAZ sy-vline 
WA_CLOISTPO_STR-IDNRK_LONG sy-vline 
WA_CLOISTPO_STR-XIDOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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