ABAP Select data from SAP table BAPIHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPIHEADER
*  INTO TABLE @DATA(IT_BAPIHEADER2).
*--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_BAPIHEADER INDEX 1 INTO DATA(WA_BAPIHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPIHEADER>-MATERIAL = 1.
<BAPIHEADER>-PLANT = 1.
<BAPIHEADER>-VALID_FROM = 1.
<BAPIHEADER>-VALID_TO = 1.
<BAPIHEADER>-VLTN_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPIHEADER-QTYSTRDATE, sy-vline,
  WA_BAPIHEADER-CE_STATUS, sy-vline,
  WA_BAPIHEADER-LOTSIZE, sy-vline,
  WA_BAPIHEADER-CSTG_VRNT, sy-vline,
  WA_BAPIHEADER-MAT_BOM, sy-vline,
  WA_BAPIHEADER-CURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPIHEADER 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_BAPIHEADER 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_BAPIHEADER INTO WA_BAPIHEADER.


*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 MATN5, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_BAPIHEADER-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIHEADER-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATNL, internal->external for field MATERIAL_EXTERNAL
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_BAPIHEADER-MATERIAL_EXTERNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIHEADER-MATERIAL_EXTERNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNW, internal->external for field MATERIAL_VERSION
CALL FUNCTION 'CONVERSION_EXIT_MATNW_OUTPUT'
  EXPORTING
    input =                      WA_BAPIHEADER-MATERIAL_VERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIHEADER-MATERIAL_VERSION.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LEDGER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPIHEADER-LEDGER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIHEADER-LEDGER.
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_BAPIHEADER_STR, 
MATERIAL TYPE STRING,
PLANT TYPE STRING,
VALID_FROM TYPE STRING,
VALID_TO TYPE STRING,
VLTN_DATE TYPE STRING,
QTYSTRDATE TYPE STRING,
CE_STATUS TYPE STRING,
LOTSIZE TYPE STRING,
CSTG_VRNT TYPE STRING,
MAT_BOM TYPE STRING,
CURRENCY TYPE STRING,
TOTAL_AMT TYPE STRING,
FIXED_AMT TYPE STRING,
TOTAL_AMT_UPPER_LEVEL TYPE STRING,
FIXED_AMT_UPPER_LEVEL TYPE STRING,
TOTAL_AMT_LOWER_LEVEL TYPE STRING,
FIXED_AMT_LOWER_LEVEL TYPE STRING,
COST_COMPONENT_LAYOUT TYPE STRING,
LOTSIZE_UNIT TYPE STRING,
MIXED_COSTING TYPE STRING,
PROCUREMENT_ALTERNATIVE TYPE STRING,
COSTING_LEVEL TYPE STRING,
PROFIT_CTR TYPE STRING,
MATERIAL_EXTERNAL TYPE STRING,
MATERIAL_GUID TYPE STRING,
MATERIAL_VERSION TYPE STRING,
LOTSIZE_UNIT_ISO TYPE STRING,
CURRENCY_ISO TYPE STRING,
MATERIAL_LONG TYPE STRING,
LEDGER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPIHEADER_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_BAPIHEADER_STR-MATERIAL sy-vline 
WA_BAPIHEADER_STR-PLANT sy-vline 
WA_BAPIHEADER_STR-VALID_FROM sy-vline 
WA_BAPIHEADER_STR-VALID_TO sy-vline 
WA_BAPIHEADER_STR-VLTN_DATE sy-vline 
WA_BAPIHEADER_STR-QTYSTRDATE sy-vline 
WA_BAPIHEADER_STR-CE_STATUS sy-vline 
WA_BAPIHEADER_STR-LOTSIZE sy-vline 
WA_BAPIHEADER_STR-CSTG_VRNT sy-vline 
WA_BAPIHEADER_STR-MAT_BOM sy-vline 
WA_BAPIHEADER_STR-CURRENCY sy-vline 
WA_BAPIHEADER_STR-TOTAL_AMT sy-vline 
WA_BAPIHEADER_STR-FIXED_AMT sy-vline 
WA_BAPIHEADER_STR-TOTAL_AMT_UPPER_LEVEL sy-vline 
WA_BAPIHEADER_STR-FIXED_AMT_UPPER_LEVEL sy-vline 
WA_BAPIHEADER_STR-TOTAL_AMT_LOWER_LEVEL sy-vline 
WA_BAPIHEADER_STR-FIXED_AMT_LOWER_LEVEL sy-vline 
WA_BAPIHEADER_STR-COST_COMPONENT_LAYOUT sy-vline 
WA_BAPIHEADER_STR-LOTSIZE_UNIT sy-vline 
WA_BAPIHEADER_STR-MIXED_COSTING sy-vline 
WA_BAPIHEADER_STR-PROCUREMENT_ALTERNATIVE sy-vline 
WA_BAPIHEADER_STR-COSTING_LEVEL sy-vline 
WA_BAPIHEADER_STR-PROFIT_CTR sy-vline 
WA_BAPIHEADER_STR-MATERIAL_EXTERNAL sy-vline 
WA_BAPIHEADER_STR-MATERIAL_GUID sy-vline 
WA_BAPIHEADER_STR-MATERIAL_VERSION sy-vline 
WA_BAPIHEADER_STR-LOTSIZE_UNIT_ISO sy-vline 
WA_BAPIHEADER_STR-CURRENCY_ISO sy-vline 
WA_BAPIHEADER_STR-MATERIAL_LONG sy-vline 
WA_BAPIHEADER_STR-LEDGER sy-vline      INTO ld_text SEPARATED BY SPACE.

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