ABAP Select data from SAP table P12DMFA_T_BLOCK_ACT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P12DMFA_T_BLOCK_ACT 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 P12DMFA_T_BLOCK_ACT. 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 P12DMFA_T_BLOCK_ACT 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_P12DMFA_T_BLOCK_ACT TYPE STANDARD TABLE OF P12DMFA_T_BLOCK_ACT,
      WA_P12DMFA_T_BLOCK_ACT TYPE P12DMFA_T_BLOCK_ACT,
      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: <P12DMFA_T_BLOCK_ACT> TYPE P12DMFA_T_BLOCK_ACT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P12DMFA_T_BLOCK_ACT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P12DMFA_T_BLOCK_ACT
  INTO TABLE IT_P12DMFA_T_BLOCK_ACT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P12DMFA_T_BLOCK_ACT
*  INTO TABLE @DATA(IT_P12DMFA_T_BLOCK_ACT2).
*--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_P12DMFA_T_BLOCK_ACT INDEX 1 INTO DATA(WA_P12DMFA_T_BLOCK_ACT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P12DMFA_T_BLOCK_ACT ASSIGNING <P12DMFA_T_BLOCK_ACT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P12DMFA_T_BLOCK_ACT>-SECTN = 1.
<P12DMFA_T_BLOCK_ACT>-ACTIO = 1.
<P12DMFA_T_BLOCK_ACT>-BLCNM = 1.
<P12DMFA_T_BLOCK_ACT>-NOSSP = 1.
<P12DMFA_T_BLOCK_ACT>-TRSTE = 1.

ENDLOOP.

LOOP AT IT_P12DMFA_T_BLOCK_ACT INTO WA_P12DMFA_T_BLOCK_ACT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P12DMFA_T_BLOCK_ACT-QUART, sy-vline,
  WA_P12DMFA_T_BLOCK_ACT-COMID, sy-vline,
  WA_P12DMFA_T_BLOCK_ACT-CRECL, sy-vline,
  WA_P12DMFA_T_BLOCK_ACT-CRCOD, sy-vline,
  WA_P12DMFA_T_BLOCK_ACT-SEQNR, sy-vline,
  WA_P12DMFA_T_BLOCK_ACT-RSZNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P12DMFA_T_BLOCK_ACT 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_P12DMFA_T_BLOCK_ACT 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_P12DMFA_T_BLOCK_ACT INTO WA_P12DMFA_T_BLOCK_ACT.


*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_P12DMFA_T_BLOCK_ACT_STR, 
SECTN TYPE STRING,
ACTIO TYPE STRING,
BLCNM TYPE STRING,
NOSSP TYPE STRING,
TRSTE TYPE STRING,
QUART TYPE STRING,
COMID TYPE STRING,
CRECL TYPE STRING,
CRCOD TYPE STRING,
SEQNR TYPE STRING,
RSZNR TYPE STRING,
RSZCA TYPE STRING,
RSZKN TYPE STRING,
NREMP TYPE STRING,
SENUM TYPE STRING,
SERCD TYPE STRING,
RENUM TYPE STRING,
REMCD TYPE STRING,
PAYFR TYPE STRING,
RMPCT TYPE STRING,
PRCOD TYPE STRING,
COCOD TYPE STRING,
COTYP TYPE STRING,
CODDE TYPE STRING,
DTCOD TYPE STRING,
INCOD TYPE STRING,
INDEG TYPE STRING,
NPURF TYPE STRING,
WRURF TYPE STRING,
OCURF TYPE STRING,
CSQNR TYPE STRING,
EMPNT TYPE STRING,
OCCOM TYPE STRING,
CMANT TYPE STRING,
CMHNT TYPE STRING,
CMSNT TYPE STRING,
CMRNT TYPE STRING,
CIAMT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P12DMFA_T_BLOCK_ACT_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_P12DMFA_T_BLOCK_ACT_STR-SECTN sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-ACTIO sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-BLCNM sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-NOSSP sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-TRSTE sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-QUART sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-COMID sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CRECL sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CRCOD sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-SEQNR sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-RSZNR sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-RSZCA sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-RSZKN sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-NREMP sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-SENUM sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-SERCD sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-RENUM sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-REMCD sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-PAYFR sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-RMPCT sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-PRCOD sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-COCOD sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-COTYP sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CODDE sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-DTCOD sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-INCOD sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-INDEG sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-NPURF sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-WRURF sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-OCURF sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CSQNR sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-EMPNT sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-OCCOM sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CMANT sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CMHNT sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CMSNT sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CMRNT sy-vline 
WA_P12DMFA_T_BLOCK_ACT_STR-CIAMT sy-vline      INTO ld_text SEPARATED BY SPACE.

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