ABAP Select data from SAP table BIW_ISU_INSTLN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BIW_ISU_INSTLN
*  INTO TABLE @DATA(IT_BIW_ISU_INSTLN2).
*--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_BIW_ISU_INSTLN INDEX 1 INTO DATA(WA_BIW_ISU_INSTLN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BIW_ISU_INSTLN>-AB = 1.
<BIW_ISU_INSTLN>-ANLAGE = 1.
<BIW_ISU_INSTLN>-VSTELLE = 1.
<BIW_ISU_INSTLN>-LOEVM = 1.
<BIW_ISU_INSTLN>-SPARTE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BIW_ISU_INSTLN-BEZUG, sy-vline,
  WA_BIW_ISU_INSTLN-ANLSTAT, sy-vline,
  WA_BIW_ISU_INSTLN-AKLASSE, sy-vline,
  WA_BIW_ISU_INSTLN-ABLEINH, sy-vline,
  WA_BIW_ISU_INSTLN-TARIFTYP, sy-vline,
  WA_BIW_ISU_INSTLN-BRANCHE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BIW_ISU_INSTLN 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_BIW_ISU_INSTLN 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_BIW_ISU_INSTLN INTO WA_BIW_ISU_INSTLN.


*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 ANLAGE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BIW_ISU_INSTLN-ANLAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_ISU_INSTLN-ANLAGE.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field STREETCODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BIW_ISU_INSTLN-STREETCODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_ISU_INSTLN-STREETCODE.
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_BIW_ISU_INSTLN_STR, 
AB TYPE STRING,
ANLAGE TYPE STRING,
VSTELLE TYPE STRING,
LOEVM TYPE STRING,
SPARTE TYPE STRING,
BEZUG TYPE STRING,
ANLSTAT TYPE STRING,
AKLASSE TYPE STRING,
ABLEINH TYPE STRING,
TARIFTYP TYPE STRING,
BRANCHE TYPE STRING,
TEMP_AREA TYPE STRING,
ABLSPERR TYPE STRING,
ANLART TYPE STRING,
SPEBENE TYPE STRING,
CITY_CODE TYPE STRING,
CITYP_CODE TYPE STRING,
STREETCODE TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
REGPOLIT TYPE STRING,
STATANZ TYPE STRING,
ERDAT TYPE STRING,
AEDAT TYPE STRING,
OUCONT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BIW_ISU_INSTLN_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_BIW_ISU_INSTLN_STR-AB sy-vline 
WA_BIW_ISU_INSTLN_STR-ANLAGE sy-vline 
WA_BIW_ISU_INSTLN_STR-VSTELLE sy-vline 
WA_BIW_ISU_INSTLN_STR-LOEVM sy-vline 
WA_BIW_ISU_INSTLN_STR-SPARTE sy-vline 
WA_BIW_ISU_INSTLN_STR-BEZUG sy-vline 
WA_BIW_ISU_INSTLN_STR-ANLSTAT sy-vline 
WA_BIW_ISU_INSTLN_STR-AKLASSE sy-vline 
WA_BIW_ISU_INSTLN_STR-ABLEINH sy-vline 
WA_BIW_ISU_INSTLN_STR-TARIFTYP sy-vline 
WA_BIW_ISU_INSTLN_STR-BRANCHE sy-vline 
WA_BIW_ISU_INSTLN_STR-TEMP_AREA sy-vline 
WA_BIW_ISU_INSTLN_STR-ABLSPERR sy-vline 
WA_BIW_ISU_INSTLN_STR-ANLART sy-vline 
WA_BIW_ISU_INSTLN_STR-SPEBENE sy-vline 
WA_BIW_ISU_INSTLN_STR-CITY_CODE sy-vline 
WA_BIW_ISU_INSTLN_STR-CITYP_CODE sy-vline 
WA_BIW_ISU_INSTLN_STR-STREETCODE sy-vline 
WA_BIW_ISU_INSTLN_STR-COUNTRY sy-vline 
WA_BIW_ISU_INSTLN_STR-REGION sy-vline 
WA_BIW_ISU_INSTLN_STR-REGPOLIT sy-vline 
WA_BIW_ISU_INSTLN_STR-STATANZ sy-vline 
WA_BIW_ISU_INSTLN_STR-ERDAT sy-vline 
WA_BIW_ISU_INSTLN_STR-AEDAT sy-vline 
WA_BIW_ISU_INSTLN_STR-OUCONT sy-vline      INTO ld_text SEPARATED BY SPACE.

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