ABAP Select data from SAP table BAPIMATHEAD into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPIMATHEAD 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 BAPIMATHEAD. 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 BAPIMATHEAD 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_BAPIMATHEAD TYPE STANDARD TABLE OF BAPIMATHEAD,
      WA_BAPIMATHEAD TYPE BAPIMATHEAD,
      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: <BAPIMATHEAD> TYPE BAPIMATHEAD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPIMATHEAD
*  INTO TABLE @DATA(IT_BAPIMATHEAD2).
*--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_BAPIMATHEAD INDEX 1 INTO DATA(WA_BAPIMATHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPIMATHEAD>-MATERIAL = 1.
<BAPIMATHEAD>-IND_SECTOR = 1.
<BAPIMATHEAD>-MATL_TYPE = 1.
<BAPIMATHEAD>-BASIC_VIEW = 1.
<BAPIMATHEAD>-SALES_VIEW = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPIMATHEAD-PURCHASE_VIEW, sy-vline,
  WA_BAPIMATHEAD-MRP_VIEW, sy-vline,
  WA_BAPIMATHEAD-FORECAST_VIEW, sy-vline,
  WA_BAPIMATHEAD-WORK_SCHED_VIEW, sy-vline,
  WA_BAPIMATHEAD-PRT_VIEW, sy-vline,
  WA_BAPIMATHEAD-STORAGE_VIEW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPIMATHEAD 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_BAPIMATHEAD 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_BAPIMATHEAD INTO WA_BAPIMATHEAD.


*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_BAPIMATHEAD-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIMATHEAD-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNL, internal->external for field MATERIAL_EXTERNAL
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_BAPIMATHEAD-MATERIAL_EXTERNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIMATHEAD-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_BAPIMATHEAD-MATERIAL_VERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIMATHEAD-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_BAPIMATHEAD-MATERIAL_LONG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIMATHEAD-MATERIAL_LONG.
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_BAPIMATHEAD_STR, 
MATERIAL TYPE STRING,
IND_SECTOR TYPE STRING,
MATL_TYPE TYPE STRING,
BASIC_VIEW TYPE STRING,
SALES_VIEW TYPE STRING,
PURCHASE_VIEW TYPE STRING,
MRP_VIEW TYPE STRING,
FORECAST_VIEW TYPE STRING,
WORK_SCHED_VIEW TYPE STRING,
PRT_VIEW TYPE STRING,
STORAGE_VIEW TYPE STRING,
WAREHOUSE_VIEW TYPE STRING,
QUALITY_VIEW TYPE STRING,
ACCOUNT_VIEW TYPE STRING,
COST_VIEW TYPE STRING,
INP_FLD_CHECK TYPE STRING,
MATERIAL_EXTERNAL TYPE STRING,
MATERIAL_GUID TYPE STRING,
MATERIAL_VERSION TYPE STRING,
MATERIAL_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPIMATHEAD_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_BAPIMATHEAD_STR-MATERIAL sy-vline 
WA_BAPIMATHEAD_STR-IND_SECTOR sy-vline 
WA_BAPIMATHEAD_STR-MATL_TYPE sy-vline 
WA_BAPIMATHEAD_STR-BASIC_VIEW sy-vline 
WA_BAPIMATHEAD_STR-SALES_VIEW sy-vline 
WA_BAPIMATHEAD_STR-PURCHASE_VIEW sy-vline 
WA_BAPIMATHEAD_STR-MRP_VIEW sy-vline 
WA_BAPIMATHEAD_STR-FORECAST_VIEW sy-vline 
WA_BAPIMATHEAD_STR-WORK_SCHED_VIEW sy-vline 
WA_BAPIMATHEAD_STR-PRT_VIEW sy-vline 
WA_BAPIMATHEAD_STR-STORAGE_VIEW sy-vline 
WA_BAPIMATHEAD_STR-WAREHOUSE_VIEW sy-vline 
WA_BAPIMATHEAD_STR-QUALITY_VIEW sy-vline 
WA_BAPIMATHEAD_STR-ACCOUNT_VIEW sy-vline 
WA_BAPIMATHEAD_STR-COST_VIEW sy-vline 
WA_BAPIMATHEAD_STR-INP_FLD_CHECK sy-vline 
WA_BAPIMATHEAD_STR-MATERIAL_EXTERNAL sy-vline 
WA_BAPIMATHEAD_STR-MATERIAL_GUID sy-vline 
WA_BAPIMATHEAD_STR-MATERIAL_VERSION sy-vline 
WA_BAPIMATHEAD_STR-MATERIAL_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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