ABAP Select data from SAP table P21_S_BRK_SF_BLOCKS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P21_S_BRK_SF_BLOCKS 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 P21_S_BRK_SF_BLOCKS. 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 P21_S_BRK_SF_BLOCKS 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_P21_S_BRK_SF_BLOCKS TYPE STANDARD TABLE OF P21_S_BRK_SF_BLOCKS,
      WA_P21_S_BRK_SF_BLOCKS TYPE P21_S_BRK_SF_BLOCKS,
      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: <P21_S_BRK_SF_BLOCKS> TYPE P21_S_BRK_SF_BLOCKS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P21_S_BRK_SF_BLOCKS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P21_S_BRK_SF_BLOCKS
  INTO TABLE IT_P21_S_BRK_SF_BLOCKS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P21_S_BRK_SF_BLOCKS
*  INTO TABLE @DATA(IT_P21_S_BRK_SF_BLOCKS2).
*--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_P21_S_BRK_SF_BLOCKS INDEX 1 INTO DATA(WA_P21_S_BRK_SF_BLOCKS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P21_S_BRK_SF_BLOCKS ASSIGNING <P21_S_BRK_SF_BLOCKS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P21_S_BRK_SF_BLOCKS>-GRPPE = 1.
<P21_S_BRK_SF_BLOCKS>-GRPPE_TXT = 1.
<P21_S_BRK_SF_BLOCKS>-BLOCK = 1.
<P21_S_BRK_SF_BLOCKS>-IS_SUMMED = 1.
<P21_S_BRK_SF_BLOCKS>-BLOCK_SUM = 1.

ENDLOOP.

LOOP AT IT_P21_S_BRK_SF_BLOCKS INTO WA_P21_S_BRK_SF_BLOCKS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P21_S_BRK_SF_BLOCKS-SEQNO, sy-vline,
  WA_P21_S_BRK_SF_BLOCKS-LGART, sy-vline,
  WA_P21_S_BRK_SF_BLOCKS-LGTXT, sy-vline,
  WA_P21_S_BRK_SF_BLOCKS-FPPER, sy-vline,
  WA_P21_S_BRK_SF_BLOCKS-FLD01, sy-vline,
  WA_P21_S_BRK_SF_BLOCKS-FLD02, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P21_S_BRK_SF_BLOCKS 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_P21_S_BRK_SF_BLOCKS 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_P21_S_BRK_SF_BLOCKS INTO WA_P21_S_BRK_SF_BLOCKS.


*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_P21_S_BRK_SF_BLOCKS_STR, 
GRPPE TYPE STRING,
GRPPE_TXT TYPE STRING,
BLOCK TYPE STRING,
IS_SUMMED TYPE STRING,
BLOCK_SUM TYPE STRING,
SEQNO TYPE STRING,
LGART TYPE STRING,
LGTXT TYPE STRING,
FPPER TYPE STRING,
FLD01 TYPE STRING,
FLD02 TYPE STRING,
FLD03 TYPE STRING,
FLD04 TYPE STRING,
FLD05 TYPE STRING,
FLD06 TYPE STRING,
FLD07 TYPE STRING,
FLD08 TYPE STRING,
FLD09 TYPE STRING,
FLD10 TYPE STRING,
FLD11 TYPE STRING,
FLD12 TYPE STRING,
FLDSM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P21_S_BRK_SF_BLOCKS_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_P21_S_BRK_SF_BLOCKS_STR-GRPPE sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-GRPPE_TXT sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-BLOCK sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-IS_SUMMED sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-BLOCK_SUM sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-SEQNO sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-LGART sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-LGTXT sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FPPER sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD01 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD02 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD03 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD04 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD05 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD06 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD07 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD08 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD09 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD10 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD11 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLD12 sy-vline 
WA_P21_S_BRK_SF_BLOCKS_STR-FLDSM sy-vline      INTO ld_text SEPARATED BY SPACE.

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