ABAP Select data from SAP table T5FDSN_PREDMELOG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T5FDSN_PREDMELOG 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 T5FDSN_PREDMELOG. 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 T5FDSN_PREDMELOG 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_T5FDSN_PREDMELOG TYPE STANDARD TABLE OF T5FDSN_PREDMELOG,
      WA_T5FDSN_PREDMELOG TYPE T5FDSN_PREDMELOG,
      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: <T5FDSN_PREDMELOG> TYPE T5FDSN_PREDMELOG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T5FDSN_PREDMELOG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T5FDSN_PREDMELOG
  INTO TABLE IT_T5FDSN_PREDMELOG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T5FDSN_PREDMELOG
*  INTO TABLE @DATA(IT_T5FDSN_PREDMELOG2).
*--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_T5FDSN_PREDMELOG INDEX 1 INTO DATA(WA_T5FDSN_PREDMELOG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T5FDSN_PREDMELOG ASSIGNING <T5FDSN_PREDMELOG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T5FDSN_PREDMELOG>-MANDT = 1.
<T5FDSN_PREDMELOG>-GLBID = 1.
<T5FDSN_PREDMELOG>-LAUFD = 1.
<T5FDSN_PREDMELOG>-LAUFI = 1.
<T5FDSN_PREDMELOG>-ZBUKR = 1.

ENDLOOP.

LOOP AT IT_T5FDSN_PREDMELOG INTO WA_T5FDSN_PREDMELOG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T5FDSN_PREDMELOG-VBLNR, sy-vline,
  WA_T5FDSN_PREDMELOG-DEMOI, sy-vline,
  WA_T5FDSN_PREDMELOG-RBETR, sy-vline,
  WA_T5FDSN_PREDMELOG-WAERS, sy-vline,
  WA_T5FDSN_PREDMELOG-LAND1, sy-vline,
  WA_T5FDSN_PREDMELOG-OPSID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T5FDSN_PREDMELOG 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_T5FDSN_PREDMELOG 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_T5FDSN_PREDMELOG INTO WA_T5FDSN_PREDMELOG.


*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 ALPHA, internal->external for field VBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T5FDSN_PREDMELOG-VBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T5FDSN_PREDMELOG-VBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field ZSPRA
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_T5FDSN_PREDMELOG-ZSPRA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T5FDSN_PREDMELOG-ZSPRA.
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_T5FDSN_PREDMELOG_STR, 
MANDT TYPE STRING,
GLBID TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
ZBUKR TYPE STRING,
VBLNR TYPE STRING,
DEMOI TYPE STRING,
RBETR TYPE STRING,
WAERS TYPE STRING,
LAND1 TYPE STRING,
OPSID TYPE STRING,
ZNME1 TYPE STRING,
ZLAND TYPE STRING,
ZSWIF TYPE STRING,
ZIBAN TYPE STRING,
ZSPRA TYPE STRING,
ZALDT TYPE STRING,
RZAWE TYPE STRING,
HKTID TYPE STRING,
HBKID TYPE STRING,
ZBNKL TYPE STRING,
AUSFD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T5FDSN_PREDMELOG_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_T5FDSN_PREDMELOG_STR-MANDT sy-vline 
WA_T5FDSN_PREDMELOG_STR-GLBID sy-vline 
WA_T5FDSN_PREDMELOG_STR-LAUFD sy-vline 
WA_T5FDSN_PREDMELOG_STR-LAUFI sy-vline 
WA_T5FDSN_PREDMELOG_STR-ZBUKR sy-vline 
WA_T5FDSN_PREDMELOG_STR-VBLNR sy-vline 
WA_T5FDSN_PREDMELOG_STR-DEMOI sy-vline 
WA_T5FDSN_PREDMELOG_STR-RBETR sy-vline 
WA_T5FDSN_PREDMELOG_STR-WAERS sy-vline 
WA_T5FDSN_PREDMELOG_STR-LAND1 sy-vline 
WA_T5FDSN_PREDMELOG_STR-OPSID sy-vline 
WA_T5FDSN_PREDMELOG_STR-ZNME1 sy-vline 
WA_T5FDSN_PREDMELOG_STR-ZLAND sy-vline 
WA_T5FDSN_PREDMELOG_STR-ZSWIF sy-vline 
WA_T5FDSN_PREDMELOG_STR-ZIBAN sy-vline 
WA_T5FDSN_PREDMELOG_STR-ZSPRA sy-vline 
WA_T5FDSN_PREDMELOG_STR-ZALDT sy-vline 
WA_T5FDSN_PREDMELOG_STR-RZAWE sy-vline 
WA_T5FDSN_PREDMELOG_STR-HKTID sy-vline 
WA_T5FDSN_PREDMELOG_STR-HBKID sy-vline 
WA_T5FDSN_PREDMELOG_STR-ZBNKL sy-vline 
WA_T5FDSN_PREDMELOG_STR-AUSFD sy-vline      INTO ld_text SEPARATED BY SPACE.

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