ABAP Select data from SAP table ISUWA_GCONT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISUWA_GCONT
*  INTO TABLE @DATA(IT_ISUWA_GCONT2).
*--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_ISUWA_GCONT INDEX 1 INTO DATA(WA_ISUWA_GCONT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISUWA_GCONT>-CONT_NO = 1.
<ISUWA_GCONT>-TEMP = 1.
<ISUWA_GCONT>-ANZAHL = 1.
<ISUWA_GCONT>-MATNR = 1.
<ISUWA_GCONT>-GERAET = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISUWA_GCONT-EQUNR, sy-vline,
  WA_ISUWA_GCONT-DEVGRP, sy-vline,
  WA_ISUWA_GCONT-ANZAHLNEU, sy-vline,
  WA_ISUWA_GCONT-MATNRNEU, sy-vline,
  WA_ISUWA_GCONT-GERAETNEU, sy-vline,
  WA_ISUWA_GCONT-EQUNRNEU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISUWA_GCONT 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_ISUWA_GCONT 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_ISUWA_GCONT INTO WA_ISUWA_GCONT.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ISUWA_GCONT-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUWA_GCONT-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_ISUWA_GCONT-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUWA_GCONT-GERAET.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field MATNRNEU
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ISUWA_GCONT-MATNRNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUWA_GCONT-MATNRNEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAETNEU
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_ISUWA_GCONT-GERAETNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUWA_GCONT-GERAETNEU.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field DEVGRPNEU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISUWA_GCONT-DEVGRPNEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISUWA_GCONT-DEVGRPNEU.
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_ISUWA_GCONT_STR, 
CONT_NO TYPE STRING,
TEMP TYPE STRING,
ANZAHL TYPE STRING,
MATNR TYPE STRING,
GERAET TYPE STRING,
EQUNR TYPE STRING,
DEVGRP TYPE STRING,
ANZAHLNEU TYPE STRING,
MATNRNEU TYPE STRING,
GERAETNEU TYPE STRING,
EQUNRNEU TYPE STRING,
DEVGRPNEU TYPE STRING,
EINBDAT TYPE STRING,
AUSBDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISUWA_GCONT_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_ISUWA_GCONT_STR-CONT_NO sy-vline 
WA_ISUWA_GCONT_STR-TEMP sy-vline 
WA_ISUWA_GCONT_STR-ANZAHL sy-vline 
WA_ISUWA_GCONT_STR-MATNR sy-vline 
WA_ISUWA_GCONT_STR-GERAET sy-vline 
WA_ISUWA_GCONT_STR-EQUNR sy-vline 
WA_ISUWA_GCONT_STR-DEVGRP sy-vline 
WA_ISUWA_GCONT_STR-ANZAHLNEU sy-vline 
WA_ISUWA_GCONT_STR-MATNRNEU sy-vline 
WA_ISUWA_GCONT_STR-GERAETNEU sy-vline 
WA_ISUWA_GCONT_STR-EQUNRNEU sy-vline 
WA_ISUWA_GCONT_STR-DEVGRPNEU sy-vline 
WA_ISUWA_GCONT_STR-EINBDAT sy-vline 
WA_ISUWA_GCONT_STR-AUSBDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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