ABAP Select data from SAP table BTC_Z02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BTC_Z02 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 BTC_Z02. 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 BTC_Z02 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_BTC_Z02 TYPE STANDARD TABLE OF BTC_Z02,
      WA_BTC_Z02 TYPE BTC_Z02,
      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: <BTC_Z02> TYPE BTC_Z02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BTC_Z02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BTC_Z02
  INTO TABLE IT_BTC_Z02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BTC_Z02
*  INTO TABLE @DATA(IT_BTC_Z022).
*--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_BTC_Z02 INDEX 1 INTO DATA(WA_BTC_Z022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BTC_Z02 ASSIGNING <BTC_Z02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BTC_Z02>-RSNUM = 1.
<BTC_Z02>-RSPOS = 1.
<BTC_Z02>-MATNR = 1.
<BTC_Z02>-WERKS = 1.
<BTC_Z02>-LGORT = 1.

ENDLOOP.

LOOP AT IT_BTC_Z02 INTO WA_BTC_Z02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BTC_Z02-CHARG, sy-vline,
  WA_BTC_Z02-BDTER, sy-vline,
  WA_BTC_Z02-BDMNG, sy-vline,
  WA_BTC_Z02-MEINS, sy-vline,
  WA_BTC_Z02-ENMNG, sy-vline,
  WA_BTC_Z02-BWART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BTC_Z02 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_BTC_Z02 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_BTC_Z02 INTO WA_BTC_Z02.


*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 CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BTC_Z02-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BTC_Z02-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BTC_Z02-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BTC_Z02-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_BTC_Z02-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BTC_Z02-POSNR.
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_BTC_Z02_STR, 
RSNUM TYPE STRING,
RSPOS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
BDTER TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
ENMNG TYPE STRING,
BWART TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
MATNR_EXTERNAL TYPE STRING,
MATNR_VERSION TYPE STRING,
MATNR_GUID TYPE STRING,
MATNR_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BTC_Z02_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_BTC_Z02_STR-RSNUM sy-vline 
WA_BTC_Z02_STR-RSPOS sy-vline 
WA_BTC_Z02_STR-MATNR sy-vline 
WA_BTC_Z02_STR-WERKS sy-vline 
WA_BTC_Z02_STR-LGORT sy-vline 
WA_BTC_Z02_STR-CHARG sy-vline 
WA_BTC_Z02_STR-BDTER sy-vline 
WA_BTC_Z02_STR-BDMNG sy-vline 
WA_BTC_Z02_STR-MEINS sy-vline 
WA_BTC_Z02_STR-ENMNG sy-vline 
WA_BTC_Z02_STR-BWART sy-vline 
WA_BTC_Z02_STR-AUFNR sy-vline 
WA_BTC_Z02_STR-POSNR sy-vline 
WA_BTC_Z02_STR-MATNR_EXTERNAL sy-vline 
WA_BTC_Z02_STR-MATNR_VERSION sy-vline 
WA_BTC_Z02_STR-MATNR_GUID sy-vline 
WA_BTC_Z02_STR-MATNR_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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