ABAP Select data from SAP table ISU_INSTLN_CHANGE_DIRECT_X into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU_INSTLN_CHANGE_DIRECT_X
*  INTO TABLE @DATA(IT_ISU_INSTLN_CHANGE_DIRECT_X2).
*--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_ISU_INSTLN_CHANGE_DIRECT_X INDEX 1 INTO DATA(WA_ISU_INSTLN_CHANGE_DIRECT_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU_INSTLN_CHANGE_DIRECT_X>-ABLSPERR = 1.
<ISU_INSTLN_CHANGE_DIRECT_X>-BAPERTYP = 1.
<ISU_INSTLN_CHANGE_DIRECT_X>-ANSCHREI = 1.
<ISU_INSTLN_CHANGE_DIRECT_X>-SPEBENE = 1.
<ISU_INSTLN_CHANGE_DIRECT_X>-ANLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU_INSTLN_CHANGE_DIRECT_X-BEZUG, sy-vline,
  WA_ISU_INSTLN_CHANGE_DIRECT_X-ABLESARTST, sy-vline,
  WA_ISU_INSTLN_CHANGE_DIRECT_X-NODISCONCT, sy-vline,
  WA_ISU_INSTLN_CHANGE_DIRECT_X-SERVICE, sy-vline,
  WA_ISU_INSTLN_CHANGE_DIRECT_X-DEREGSTAT, sy-vline,
  WA_ISU_INSTLN_CHANGE_DIRECT_X-INFOREL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISU_INSTLN_CHANGE_DIRECT_X 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_ISU_INSTLN_CHANGE_DIRECT_X 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_ISU_INSTLN_CHANGE_DIRECT_X INTO WA_ISU_INSTLN_CHANGE_DIRECT_X.


*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_ISU_INSTLN_CHANGE_DIRECT_X_STR, 
ABLSPERR TYPE STRING,
BAPERTYP TYPE STRING,
ANSCHREI TYPE STRING,
SPEBENE TYPE STRING,
ANLART TYPE STRING,
BEZUG TYPE STRING,
ABLESARTST TYPE STRING,
NODISCONCT TYPE STRING,
SERVICE TYPE STRING,
DEREGSTAT TYPE STRING,
INFOREL TYPE STRING,
TARIFTYP TYPE STRING,
KONZBEFR TYPE STRING,
PAUSCHAL TYPE STRING,
BRANCHE TYPE STRING,
AKLASSE TYPE STRING,
ABLEINH TYPE STRING,
TEMP_AREA TYPE STRING,
KONZVER TYPE STRING,
BILLING_PARTY TYPE STRING,
INVOICING_PARTY TYPE STRING,
PROV_LAST_RES TYPE STRING,
MAININST TYPE STRING,
INSTROLE TYPE STRING,
INSTGRTYPE TYPE STRING,
ISTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU_INSTLN_CHANGE_DIRECT_X_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_ISU_INSTLN_CHANGE_DIRECT_X_STR-ABLSPERR sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-BAPERTYP sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-ANSCHREI sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-SPEBENE sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-ANLART sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-BEZUG sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-ABLESARTST sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-NODISCONCT sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-SERVICE sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-DEREGSTAT sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-INFOREL sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-TARIFTYP sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-KONZBEFR sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-PAUSCHAL sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-BRANCHE sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-AKLASSE sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-ABLEINH sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-TEMP_AREA sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-KONZVER sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-BILLING_PARTY sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-INVOICING_PARTY sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-PROV_LAST_RES sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-MAININST sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-INSTROLE sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-INSTGRTYPE sy-vline 
WA_ISU_INSTLN_CHANGE_DIRECT_X_STR-ISTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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