ABAP Select data from SAP table P03_CLRNG_MLDIF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P03_CLRNG_MLDIF 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 P03_CLRNG_MLDIF. 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 P03_CLRNG_MLDIF 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_P03_CLRNG_MLDIF TYPE STANDARD TABLE OF P03_CLRNG_MLDIF,
      WA_P03_CLRNG_MLDIF TYPE P03_CLRNG_MLDIF,
      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: <P03_CLRNG_MLDIF> TYPE P03_CLRNG_MLDIF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P03_CLRNG_MLDIF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P03_CLRNG_MLDIF
  INTO TABLE IT_P03_CLRNG_MLDIF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P03_CLRNG_MLDIF
*  INTO TABLE @DATA(IT_P03_CLRNG_MLDIF2).
*--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_P03_CLRNG_MLDIF INDEX 1 INTO DATA(WA_P03_CLRNG_MLDIF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P03_CLRNG_MLDIF ASSIGNING <P03_CLRNG_MLDIF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P03_CLRNG_MLDIF>-BRSTD = 1.
<P03_CLRNG_MLDIF>-DRNGD = 1.
<P03_CLRNG_MLDIF>-TRGCD = 1.
<P03_CLRNG_MLDIF>-REFNR = 1.
<P03_CLRNG_MLDIF>-SVSNR = 1.

ENDLOOP.

LOOP AT IT_P03_CLRNG_MLDIF INTO WA_P03_CLRNG_MLDIF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P03_CLRNG_MLDIF-FAMNM, sy-vline,
  WA_P03_CLRNG_MLDIF-VORNM, sy-vline,
  WA_P03_CLRNG_MLDIF-PRJCD, sy-vline,
  WA_P03_CLRNG_MLDIF-BSTBZ, sy-vline,
  WA_P03_CLRNG_MLDIF-SAART, sy-vline,
  WA_P03_CLRNG_MLDIF-SRTBZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P03_CLRNG_MLDIF 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_P03_CLRNG_MLDIF 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_P03_CLRNG_MLDIF INTO WA_P03_CLRNG_MLDIF.


*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_P03_CLRNG_MLDIF_STR, 
BRSTD TYPE STRING,
DRNGD TYPE STRING,
TRGCD TYPE STRING,
REFNR TYPE STRING,
SVSNR TYPE STRING,
FAMNM TYPE STRING,
VORNM TYPE STRING,
PRJCD TYPE STRING,
BSTBZ TYPE STRING,
SAART TYPE STRING,
SRTBZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P03_CLRNG_MLDIF_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_P03_CLRNG_MLDIF_STR-BRSTD sy-vline 
WA_P03_CLRNG_MLDIF_STR-DRNGD sy-vline 
WA_P03_CLRNG_MLDIF_STR-TRGCD sy-vline 
WA_P03_CLRNG_MLDIF_STR-REFNR sy-vline 
WA_P03_CLRNG_MLDIF_STR-SVSNR sy-vline 
WA_P03_CLRNG_MLDIF_STR-FAMNM sy-vline 
WA_P03_CLRNG_MLDIF_STR-VORNM sy-vline 
WA_P03_CLRNG_MLDIF_STR-PRJCD sy-vline 
WA_P03_CLRNG_MLDIF_STR-BSTBZ sy-vline 
WA_P03_CLRNG_MLDIF_STR-SAART sy-vline 
WA_P03_CLRNG_MLDIF_STR-SRTBZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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