ABAP Select data from SAP table BIW_IQ_C into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BIW_IQ_C 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_IQ_C. 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_IQ_C 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_IQ_C TYPE STANDARD TABLE OF BIW_IQ_C,
      WA_BIW_IQ_C TYPE BIW_IQ_C,
      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_IQ_C> TYPE BIW_IQ_C.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BIW_IQ_C
*  INTO TABLE @DATA(IT_BIW_IQ_C2).
*--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_IQ_C INDEX 1 INTO DATA(WA_BIW_IQ_C2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BIW_IQ_C>-GNJHR = 1.
<BIW_IQ_C>-POSID = 1.
<BIW_IQ_C>-FISCVAR = 1.
<BIW_IQ_C>-KOKRS = 1.
<BIW_IQ_C>-VERSI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BIW_IQ_C-MEASTYPE, sy-vline,
  WA_BIW_IQ_C-VTYPE, sy-vline,
  WA_BIW_IQ_C-WIDAT, sy-vline,
  WA_BIW_IQ_C-KAPWRT, sy-vline,
  WA_BIW_IQ_C-WAERS, sy-vline,
  WA_BIW_IQ_C-CURTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BIW_IQ_C 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_IQ_C 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_IQ_C INTO WA_BIW_IQ_C.


*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 GJAHR, internal->external for field GNJHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_BIW_IQ_C-GNJHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_IQ_C-GNJHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REQID, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_REQID_OUTPUT'
  EXPORTING
    input =                      WA_BIW_IQ_C-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_IQ_C-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BIW_IQ_C-VERSI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BIW_IQ_C-VERSI.
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_IQ_C_STR, 
GNJHR TYPE STRING,
POSID TYPE STRING,
FISCVAR TYPE STRING,
KOKRS TYPE STRING,
VERSI TYPE STRING,
MEASTYPE TYPE STRING,
VTYPE TYPE STRING,
WIDAT TYPE STRING,
KAPWRT TYPE STRING,
WAERS TYPE STRING,
CURTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BIW_IQ_C_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_IQ_C_STR-GNJHR sy-vline 
WA_BIW_IQ_C_STR-POSID sy-vline 
WA_BIW_IQ_C_STR-FISCVAR sy-vline 
WA_BIW_IQ_C_STR-KOKRS sy-vline 
WA_BIW_IQ_C_STR-VERSI sy-vline 
WA_BIW_IQ_C_STR-MEASTYPE sy-vline 
WA_BIW_IQ_C_STR-VTYPE sy-vline 
WA_BIW_IQ_C_STR-WIDAT sy-vline 
WA_BIW_IQ_C_STR-KAPWRT sy-vline 
WA_BIW_IQ_C_STR-WAERS sy-vline 
WA_BIW_IQ_C_STR-CURTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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