ABAP Select data from SAP table ISU_BI_MASTER_DATA_DSP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISU_BI_MASTER_DATA_DSP 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_BI_MASTER_DATA_DSP. 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_BI_MASTER_DATA_DSP 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_BI_MASTER_DATA_DSP TYPE STANDARD TABLE OF ISU_BI_MASTER_DATA_DSP,
      WA_ISU_BI_MASTER_DATA_DSP TYPE ISU_BI_MASTER_DATA_DSP,
      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_BI_MASTER_DATA_DSP> TYPE ISU_BI_MASTER_DATA_DSP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU_BI_MASTER_DATA_DSP
*  INTO TABLE @DATA(IT_ISU_BI_MASTER_DATA_DSP2).
*--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_BI_MASTER_DATA_DSP INDEX 1 INTO DATA(WA_ISU_BI_MASTER_DATA_DSP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU_BI_MASTER_DATA_DSP>-TABNAME = 1.
<ISU_BI_MASTER_DATA_DSP>-OBJNAME = 1.
<ISU_BI_MASTER_DATA_DSP>-OBJKEY1 = 1.
<ISU_BI_MASTER_DATA_DSP>-OBJKEY2 = 1.
<ISU_BI_MASTER_DATA_DSP>-OBJKEY3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU_BI_MASTER_DATA_DSP-SPARTE, sy-vline,
  WA_ISU_BI_MASTER_DATA_DSP-AKLASSE, sy-vline,
  WA_ISU_BI_MASTER_DATA_DSP-OBJTEXT, sy-vline,
  WA_ISU_BI_MASTER_DATA_DSP-ST1, sy-vline,
  WA_ISU_BI_MASTER_DATA_DSP-ST2, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_ISU_BI_MASTER_DATA_DSP 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_BI_MASTER_DATA_DSP 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_BI_MASTER_DATA_DSP INTO WA_ISU_BI_MASTER_DATA_DSP.


*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_BI_MASTER_DATA_DSP_STR, 
TABNAME TYPE STRING,
OBJNAME TYPE STRING,
OBJKEY1 TYPE STRING,
OBJKEY2 TYPE STRING,
OBJKEY3 TYPE STRING,
SPARTE TYPE STRING,
AKLASSE TYPE STRING,
OBJTEXT TYPE STRING,
ST1 TYPE STRING,
ST2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU_BI_MASTER_DATA_DSP_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_BI_MASTER_DATA_DSP_STR-TABNAME sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-OBJNAME sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-OBJKEY1 sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-OBJKEY2 sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-OBJKEY3 sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-SPARTE sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-AKLASSE sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-OBJTEXT sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-ST1 sy-vline 
WA_ISU_BI_MASTER_DATA_DSP_STR-ST2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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