ABAP Select data from SAP table BRF_TEST_STRUCTURE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BRF_TEST_STRUCTURE
*  INTO TABLE @DATA(IT_BRF_TEST_STRUCTURE2).
*--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_BRF_TEST_STRUCTURE INDEX 1 INTO DATA(WA_BRF_TEST_STRUCTURE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BRF_TEST_STRUCTURE>-A_TRUE = 1.
<BRF_TEST_STRUCTURE>-A_FALSE = 1.
<BRF_TEST_STRUCTURE>-TRUE_1 = 1.
<BRF_TEST_STRUCTURE>-TRUE_2 = 1.
<BRF_TEST_STRUCTURE>-TRUE_3 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BRF_TEST_STRUCTURE-TRUE_4, sy-vline,
  WA_BRF_TEST_STRUCTURE-FALSE_1, sy-vline,
  WA_BRF_TEST_STRUCTURE-FALSE_2, sy-vline,
  WA_BRF_TEST_STRUCTURE-FALSE_3, sy-vline,
  WA_BRF_TEST_STRUCTURE-FALSE_4, sy-vline,
  WA_BRF_TEST_STRUCTURE-VALUE_1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BRF_TEST_STRUCTURE 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_BRF_TEST_STRUCTURE 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_BRF_TEST_STRUCTURE INTO WA_BRF_TEST_STRUCTURE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_BRF_TEST_STRUCTURE_STR, 
A_TRUE TYPE STRING,
A_FALSE TYPE STRING,
TRUE_1 TYPE STRING,
TRUE_2 TYPE STRING,
TRUE_3 TYPE STRING,
TRUE_4 TYPE STRING,
FALSE_1 TYPE STRING,
FALSE_2 TYPE STRING,
FALSE_3 TYPE STRING,
FALSE_4 TYPE STRING,
VALUE_1 TYPE STRING,
VI1 TYPE STRING,
VI2 TYPE STRING,
VN1 TYPE STRING,
VN2 TYPE STRING,
P1 TYPE STRING,
P2 TYPE STRING,
P3 TYPE STRING,
P4 TYPE STRING,
M1 TYPE STRING,
MC1 TYPE STRING,
F1 TYPE STRING,
F2 TYPE STRING,
F3 TYPE STRING,
F4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BRF_TEST_STRUCTURE_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_BRF_TEST_STRUCTURE_STR-A_TRUE sy-vline 
WA_BRF_TEST_STRUCTURE_STR-A_FALSE sy-vline 
WA_BRF_TEST_STRUCTURE_STR-TRUE_1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-TRUE_2 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-TRUE_3 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-TRUE_4 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-FALSE_1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-FALSE_2 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-FALSE_3 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-FALSE_4 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-VALUE_1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-VI1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-VI2 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-VN1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-VN2 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-P1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-P2 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-P3 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-P4 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-M1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-MC1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-F1 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-F2 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-F3 sy-vline 
WA_BRF_TEST_STRUCTURE_STR-F4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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