ABAP Select data from SAP table BAPI2001_COMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPI2001_COMP 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 BAPI2001_COMP. 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 BAPI2001_COMP 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_BAPI2001_COMP TYPE STANDARD TABLE OF BAPI2001_COMP,
      WA_BAPI2001_COMP TYPE BAPI2001_COMP,
      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: <BAPI2001_COMP> TYPE BAPI2001_COMP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BAPI2001_COMP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BAPI2001_COMP
  INTO TABLE IT_BAPI2001_COMP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI2001_COMP
*  INTO TABLE @DATA(IT_BAPI2001_COMP2).
*--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_BAPI2001_COMP INDEX 1 INTO DATA(WA_BAPI2001_COMP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BAPI2001_COMP ASSIGNING <BAPI2001_COMP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI2001_COMP>-RESERV_NO = 1.
<BAPI2001_COMP>-RES_ITEM = 1.
<BAPI2001_COMP>-ITM_NUMBER = 1.
<BAPI2001_COMP>-MATERIAL = 1.
<BAPI2001_COMP>-REQ_QUAN = 1.

ENDLOOP.

LOOP AT IT_BAPI2001_COMP INTO WA_BAPI2001_COMP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI2001_COMP-BASE_UOM, sy-vline,
  WA_BAPI2001_COMP-ORDERID, sy-vline,
  WA_BAPI2001_COMP-ACTIVITY, sy-vline,
  WA_BAPI2001_COMP-ITEM_TEXT, sy-vline,
  WA_BAPI2001_COMP-OBJECT_NO, sy-vline,
  WA_BAPI2001_COMP-COMP_INDEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI2001_COMP 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_BAPI2001_COMP 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_BAPI2001_COMP INTO WA_BAPI2001_COMP.


*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 NUMCV, internal->external for field ITM_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-ITM_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-ITM_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASE_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-BASE_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-BASE_UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORDERID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-ORDERID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-ORDERID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field ACTIVITY
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-ACTIVITY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-ACTIVITY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GL_ACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-GL_ACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-GL_ACCOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PREQ_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-PREQ_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-PREQ_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VENDOR_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-VENDOR_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-VENDOR_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AGREEMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-AGREEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-AGREEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INFO_REC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI2001_COMP-INFO_REC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI2001_COMP-INFO_REC.
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_BAPI2001_COMP_STR, 
RESERV_NO TYPE STRING,
RES_ITEM TYPE STRING,
ITM_NUMBER TYPE STRING,
MATERIAL TYPE STRING,
REQ_QUAN TYPE STRING,
BASE_UOM TYPE STRING,
ORDERID TYPE STRING,
ACTIVITY TYPE STRING,
ITEM_TEXT TYPE STRING,
OBJECT_NO TYPE STRING,
COMP_INDEX TYPE STRING,
APLZL TYPE STRING,
MATL_DESC TYPE STRING,
PLANT TYPE STRING,
STGE_LOC TYPE STRING,
BATCH TYPE STRING,
SPEC_STOCK TYPE STRING,
FIXED_QUAN TYPE STRING,
ITEM_CAT TYPE STRING,
REQ_DATE TYPE STRING,
MOVEMENT TYPE STRING,
MOVE_TYPE TYPE STRING,
VAL_PRICE TYPE STRING,
CURRENCY TYPE STRING,
GL_ACCOUNT TYPE STRING,
GR_RCPT TYPE STRING,
UNLOAD_PT TYPE STRING,
PREQ_NO TYPE STRING,
PREQ_ITEM TYPE STRING,
PRICE_UNIT TYPE STRING,
MATL_GROUP TYPE STRING,
PUR_GROUP TYPE STRING,
PURCH_ORG TYPE STRING,
VENDOR_NO TYPE STRING,
AGREEMENT TYPE STRING,
AGMT_ITEM TYPE STRING,
INFO_REC TYPE STRING,
GR_PR_TIME TYPE STRING,
PREQ_NAME TYPE STRING,
TRACKINGNO TYPE STRING,
VEND_MAT TYPE STRING,
PRODUCT_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI2001_COMP_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_BAPI2001_COMP_STR-RESERV_NO sy-vline 
WA_BAPI2001_COMP_STR-RES_ITEM sy-vline 
WA_BAPI2001_COMP_STR-ITM_NUMBER sy-vline 
WA_BAPI2001_COMP_STR-MATERIAL sy-vline 
WA_BAPI2001_COMP_STR-REQ_QUAN sy-vline 
WA_BAPI2001_COMP_STR-BASE_UOM sy-vline 
WA_BAPI2001_COMP_STR-ORDERID sy-vline 
WA_BAPI2001_COMP_STR-ACTIVITY sy-vline 
WA_BAPI2001_COMP_STR-ITEM_TEXT sy-vline 
WA_BAPI2001_COMP_STR-OBJECT_NO sy-vline 
WA_BAPI2001_COMP_STR-COMP_INDEX sy-vline 
WA_BAPI2001_COMP_STR-APLZL sy-vline 
WA_BAPI2001_COMP_STR-MATL_DESC sy-vline 
WA_BAPI2001_COMP_STR-PLANT sy-vline 
WA_BAPI2001_COMP_STR-STGE_LOC sy-vline 
WA_BAPI2001_COMP_STR-BATCH sy-vline 
WA_BAPI2001_COMP_STR-SPEC_STOCK sy-vline 
WA_BAPI2001_COMP_STR-FIXED_QUAN sy-vline 
WA_BAPI2001_COMP_STR-ITEM_CAT sy-vline 
WA_BAPI2001_COMP_STR-REQ_DATE sy-vline 
WA_BAPI2001_COMP_STR-MOVEMENT sy-vline 
WA_BAPI2001_COMP_STR-MOVE_TYPE sy-vline 
WA_BAPI2001_COMP_STR-VAL_PRICE sy-vline 
WA_BAPI2001_COMP_STR-CURRENCY sy-vline 
WA_BAPI2001_COMP_STR-GL_ACCOUNT sy-vline 
WA_BAPI2001_COMP_STR-GR_RCPT sy-vline 
WA_BAPI2001_COMP_STR-UNLOAD_PT sy-vline 
WA_BAPI2001_COMP_STR-PREQ_NO sy-vline 
WA_BAPI2001_COMP_STR-PREQ_ITEM sy-vline 
WA_BAPI2001_COMP_STR-PRICE_UNIT sy-vline 
WA_BAPI2001_COMP_STR-MATL_GROUP sy-vline 
WA_BAPI2001_COMP_STR-PUR_GROUP sy-vline 
WA_BAPI2001_COMP_STR-PURCH_ORG sy-vline 
WA_BAPI2001_COMP_STR-VENDOR_NO sy-vline 
WA_BAPI2001_COMP_STR-AGREEMENT sy-vline 
WA_BAPI2001_COMP_STR-AGMT_ITEM sy-vline 
WA_BAPI2001_COMP_STR-INFO_REC sy-vline 
WA_BAPI2001_COMP_STR-GR_PR_TIME sy-vline 
WA_BAPI2001_COMP_STR-PREQ_NAME sy-vline 
WA_BAPI2001_COMP_STR-TRACKINGNO sy-vline 
WA_BAPI2001_COMP_STR-VEND_MAT sy-vline 
WA_BAPI2001_COMP_STR-PRODUCT_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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